ASTROPHYSICAL RESEARCH CONSORTIUM: Form 990, tax year 2024

View the entire original 990 at ProPublica ↗

Organization: ASTROPHYSICAL RESEARCH CONSORTIUM (EIN 91-1265806)
Tax period: 2024-01-01 to 2024-12-31
Filed: 2025-10-22
IRS object ID: 202522959349301382
Schema version: 2024v5.2
Source: Download XML · Original 990 at ProPublica

Every field in the e-filed return. Faint text is the IRS element name, for citing.

Return header
Form 990
Schedule A
Schedule B
Schedule D
Schedule F
Schedule J
Schedule O

Return header ReturnHeader

Field	Value	IRS element (for citing)
Return	2025-10-22T12:55:26-05:00	ReturnTs
Tax Period End	2024-12-31	TaxPeriodEndDt

Preparer Firm PreparerFirmGrp

Field	Value	IRS element (for citing)
Preparer Firm EIN	911194016	PreparerFirmEIN

Preparer Firm Name PreparerFirmName

Field	Value	IRS element (for citing)
Business Name Line1	Clark Nuber PS	BusinessNameLine1Txt

Preparer US Address PreparerUSAddress

Field	Value	IRS element (for citing)
Address Line1	10900 NE 4th Street Suite 1400	AddressLine1Txt
City	Bellevue	CityNm
State Abbreviation	WA	StateAbbreviationCd
ZIP	98004	ZIPCd

Field	Value	IRS element (for citing)
Return Type	990	ReturnTypeCd
Tax Period Begin	2024-01-01	TaxPeriodBeginDt

Filer Filer

Field	Value	IRS element (for citing)
EIN	911265806	EIN

Business Name BusinessName

Field	Value	IRS element (for citing)
Business Name Line1	Astrophysical Research Consortium	BusinessNameLine1Txt

Field	Value	IRS element (for citing)
Business Name Control	ASTR	BusinessNameControlTxt
Phone	2066160035	PhoneNum

US Address USAddress

Field	Value	IRS element (for citing)
Address Line1	co Astronomy Dept Box 351580 UW	AddressLine1Txt
City	Seattle	CityNm
State Abbreviation	WA	StateAbbreviationCd
ZIP	981951580	ZIPCd

Business Officer BusinessOfficerGrp

Field	Value	IRS element (for citing)
Person	Henry Chip Kobulnicky	PersonNm
Person Title	Secretary and Treasurer	PersonTitleTxt
Phone	2066160035	PhoneNum
Signature	2025-10-16	SignatureDt
Discuss With Paid Preparer	Yes (1)	DiscussWithPaidPreparerInd

Field	Value	IRS element (for citing)
IRS Responsible Prty Info Curr	0	IRSResponsiblePrtyInfoCurrInd

Preparer Person PreparerPersonGrp

Field	Value	IRS element (for citing)
Preparer Person	Karen L Dunn	PreparerPersonNm
PTIN	P00192887	PTIN
Phone	4254544919	PhoneNum
Preparation	2025-10-16	PreparationDt

Field	Value	IRS element (for citing)
Tax	2024	TaxYr
Build TS	2025-03-06 01:10:19Z	BuildTS

Form 990 IRS990

Field	Value	IRS element (for citing)
Principal Officer	Henry Chip Kobulnicky	PrincipalOfficerNm

US Address USAddress

Field	Value	IRS element (for citing)
Address Line1	c/o Astronomy Dept Box 351580 UW	AddressLine1Txt
City	Seattle	CityNm
State Abbreviation	WA	StateAbbreviationCd
ZIP	981951580	ZIPCd

Field	Value	IRS element (for citing)
Gross Receipts	$7,477,567	GrossReceiptsAmt
Group Return For Affiliates	0	GroupReturnForAffiliatesInd
Organization501c3	Yes (X)	Organization501c3Ind
Website Address	HTTP://ARC.APO.NMSU.EDU	WebsiteAddressTxt
Type Of Organization Corp	Yes (X)	TypeOfOrganizationCorpInd
Formation	1984	FormationYr
Legal Domicile State	WA	LegalDomicileStateCd
Activity Or Mission	Astrophysical Research Consortium was established to design, build and operate a variety of sizes and shapes of telescopes at its Apache Point site at Sunspot, New Mexico.	ActivityOrMissionDesc
Voting Members Governing Body	18	VotingMembersGoverningBodyCnt
Voting Members Independent	17	VotingMembersIndependentCnt
Total Employee	60	TotalEmployeeCnt
Total Volunteers	18	TotalVolunteersCnt
Total Gross UBI	$0	TotalGrossUBIAmt
Net Unrelated Bus Txbl Incm	$0	NetUnrelatedBusTxblIncmAmt
PY Contributions Grants	$3,323,812	PYContributionsGrantsAmt
CY Contributions Grants	$58,527	CYContributionsGrantsAmt
PY Program Service Revenue	$4,681,191	PYProgramServiceRevenueAmt
CY Program Service Revenue	$4,558,799	CYProgramServiceRevenueAmt
PY Investment Income	$249,569	PYInvestmentIncomeAmt
CY Investment Income	$582,665	CYInvestmentIncomeAmt
PY Other Revenue	$9,841	PYOtherRevenueAmt
CY Other Revenue	$10,566	CYOtherRevenueAmt
PY Total Revenue	$8,264,413	PYTotalRevenueAmt
CY Total Revenue	$5,210,557	CYTotalRevenueAmt
PY Grants And Similar Paid	$0	PYGrantsAndSimilarPaidAmt
CY Grants And Similar Paid	$0	CYGrantsAndSimilarPaidAmt
PY Benefits Paid To Members	$0	PYBenefitsPaidToMembersAmt
CY Benefits Paid To Members	$0	CYBenefitsPaidToMembersAmt
PY Salaries Comp Emp Bnft Paid	$2,657,153	PYSalariesCompEmpBnftPaidAmt
CY Salaries Comp Emp Bnft Paid	$3,238,282	CYSalariesCompEmpBnftPaidAmt
PY Total Prof Fndrsng Expns	$0	PYTotalProfFndrsngExpnsAmt
CY Total Prof Fndrsng Expns	$0	CYTotalProfFndrsngExpnsAmt
CY Total Fundraising Expense	$0	CYTotalFundraisingExpenseAmt
PY Other Expenses	$7,716,164	PYOtherExpensesAmt
CY Other Expenses	$7,937,544	CYOtherExpensesAmt
PY Total Expenses	$10,373,317	PYTotalExpensesAmt
CY Total Expenses	$11,175,826	CYTotalExpensesAmt
PY Revenues Less Expenses	-$2,108,904	PYRevenuesLessExpensesAmt
CY Revenues Less Expenses	-$5,965,269	CYRevenuesLessExpensesAmt
Total Assets BOY	$40,684,195	TotalAssetsBOYAmt
Total Assets EOY	$34,675,831	TotalAssetsEOYAmt
Total Liabilities BOY	$3,106,723	TotalLiabilitiesBOYAmt
Total Liabilities EOY	$3,028,595	TotalLiabilitiesEOYAmt
Net Assets Or Fund Balances BOY	$37,577,472	NetAssetsOrFundBalancesBOYAmt
Net Assets Or Fund Balances EOY	$31,647,236	NetAssetsOrFundBalancesEOYAmt
Info In Schedule O Part III	Yes (X)	InfoInScheduleOPartIIIInd
Mission	Astrophysical Research Consortium operates two telescopes at the Apache Point Observatory. There is a 3.5-meter general purpose telescope and a survey specialized 2.5-meter Sloan Foundation telescope. The telescopes have distinct purposes in the service of their constituencies.	MissionDesc
Significant New Program Srvc	0	SignificantNewProgramSrvcInd
Significant Change	0	SignificantChangeInd
Expense	$10,714,519	ExpenseAmt
Revenue	$4,566,465	RevenueAmt
Desc	The 3.5-meter telescope benefits the research faculty, graduate and undergraduate students, and public outreach programs of each member institution. Using innovative remote software, astronomers can operate and collect data from anywhere in the world. The telescope has a suite of cameras and spectrographs that serve a wide variety of scientific endeavors, resulting in more than 50 refereed science results being published each year. The telescope is also used regularly for a NASA-funded lunar laser ranging project. There is an active outreach program at the observatory and at member institutions.The 2.5-meter telescope, which operates the SDSS-IV and SDSS-V survey projects, had a productive year. The SDSS-IV project was completed in December 2021. The SDSS-V survey began in October 2020 (slightly delayed due to COVID19) and is still fund-raising (trying to have more member institutions joined). A new corrector lens was built for the Sloan telescope. A new robotic fiber positioning system ("The FPS") was installed and commissioned at APO in November and December of 2021 and a second FPS was installed and commissioned at LCO in August and September of 2022. Operations are ongoing at APO and at LCO. The Local Volume Mapper Instrument (LVMi) has been installed at LCO starting February of 2023. LVMi operations began in 2023. Since December 2024 LVMi has been robotically operated.	Desc
Total Program Service Expenses	$10,714,519	TotalProgramServiceExpensesAmt
Described In Section501c3	Yes (1)	DescribedInSection501c3Ind
Schedule B Required	Yes (1)	ScheduleBRequiredInd
Political Campaign Acty	0	PoliticalCampaignActyInd
Lobbying Activities	0	LobbyingActivitiesInd
Subject To Proxy Tax	0	SubjectToProxyTaxInd
Donor Advised Fund	0	DonorAdvisedFundInd
Conservation Easements	0	ConservationEasementsInd
Collections Of Art	0	CollectionsOfArtInd
Credit Counseling	0	CreditCounselingInd
Donor Rstr Or Quasi Endowments	0	DonorRstrOrQuasiEndowmentsInd
Report Land Building Equipment	Yes (1)	ReportLandBuildingEquipmentInd
Report Investments Other Sec	0	ReportInvestmentsOtherSecInd
Report Program Related Invst	0	ReportProgramRelatedInvstInd
Report Other Assets	0	ReportOtherAssetsInd
Report Other Liabilities	0	ReportOtherLiabilitiesInd
Include FIN48 Footnote	0	IncludeFIN48FootnoteInd
Independent Audit Fincl Stmt	Yes (1)	IndependentAuditFinclStmtInd
Consolidated Audit Fincl Stmt	0	ConsolidatedAuditFinclStmtInd
School Operating	0	SchoolOperatingInd
Foreign Office	Yes (1)	ForeignOfficeInd
Foreign Activities	Yes (1)	ForeignActivitiesInd
More Than5000 K To Org	0	MoreThan5000KToOrgInd
More Than5000 K To Individuals	0	MoreThan5000KToIndividualsInd
Professional Fundraising	0	ProfessionalFundraisingInd
Fundraising Activities	0	FundraisingActivitiesInd
Gaming Activities	0	GamingActivitiesInd
Operate Hospital	0	OperateHospitalInd
Grants To Organizations	0	GrantsToOrganizationsInd
Grants To Individuals	0	GrantsToIndividualsInd
Schedule J Required	Yes (1)	ScheduleJRequiredInd
Tax Exempt Bonds	0	TaxExemptBondsInd
Engaged In Excess Benefit Trans	0	EngagedInExcessBenefitTransInd
PY Excess Benefit Trans	0	PYExcessBenefitTransInd
Loan Outstanding	0	LoanOutstandingInd
Grant To Related Person	0	GrantToRelatedPersonInd
Business Rln With Org Mem	0	BusinessRlnWithOrgMemInd
Business Rln With Fam Mem	0	BusinessRlnWithFamMemInd
Business Rln With35 Ctrl Ent	0	BusinessRlnWith35CtrlEntInd
Deductible Non Cash Contri	0	DeductibleNonCashContriInd
Deductible Art Contribution	0	DeductibleArtContributionInd
Terminate Operations	0	TerminateOperationsInd
Partial Liquidation	0	PartialLiquidationInd
Disregarded Entity	0	DisregardedEntityInd
Related Entity	0	RelatedEntityInd
Related Organization Ctrl Ent	0	RelatedOrganizationCtrlEntInd
Trnsfr Exmpt Non Chrtbl Rltd Org	0	TrnsfrExmptNonChrtblRltdOrgInd
Activities Conducted Prtshp	0	ActivitiesConductedPrtshpInd
Schedule O Required	Yes (1)	ScheduleORequiredInd
IRP Document	34	IRPDocumentCnt
IRP Document W2 G	0	IRPDocumentW2GCnt
Employee	60	EmployeeCnt
Employment Tax Returns Filed	Yes (1)	EmploymentTaxReturnsFiledInd
Unrelated Bus Incm Over Limit	0	UnrelatedBusIncmOverLimitInd
Foreign Financial Account	0	ForeignFinancialAccountInd
Prohibited Tax Shelter Trans	0	ProhibitedTaxShelterTransInd
Taxable Party Notification	0	TaxablePartyNotificationInd
Nondeductible Contributions	0	NondeductibleContributionsInd
Quid Pro Quo Contributions	0	QuidProQuoContributionsInd
Form8282 Property Disposed Of	0	Form8282PropertyDisposedOfInd
Rcv Fnds To Pay Prsnl Bnft Cntrct	0	RcvFndsToPayPrsnlBnftCntrctInd
Pay Premiums Prsnl Bnft Cntrct	0	PayPremiumsPrsnlBnftCntrctInd
Indoor Tanning Services	0	IndoorTanningServicesInd
Subj To Tax Rmnrtn Ex Prcht Pymt	0	SubjToTaxRmnrtnExPrchtPymtInd
Subject To Excs Tax Net Invst Inc	0	SubjectToExcsTaxNetInvstIncInd
Info In Schedule O Part VI	Yes (X)	InfoInScheduleOPartVIInd
Governing Body Voting Members	18	GoverningBodyVotingMembersCnt
Independent Voting Member	17	IndependentVotingMemberCnt
Family Or Business Rln	0	FamilyOrBusinessRlnInd
Delegation Of Mgmt Duties	0	DelegationOfMgmtDutiesInd
Change To Org Documents	0	ChangeToOrgDocumentsInd
Material Diversion Or Misuse	0	MaterialDiversionOrMisuseInd
Members Or Stockholders	Yes (1)	MembersOrStockholdersInd
Election Of Board Members	Yes (1)	ElectionOfBoardMembersInd
Decisions Subject To Approva	Yes (1)	DecisionsSubjectToApprovaInd
Minutes Of Governing Body	Yes (1)	MinutesOfGoverningBodyInd
Minutes Of Committees	Yes (1)	MinutesOfCommitteesInd
Officer Mailing Address	0	OfficerMailingAddressInd
Local Chapters	0	LocalChaptersInd
Form990 Provided To Gvrn Body	Yes (1)	Form990ProvidedToGvrnBodyInd
Conflict Of Interest Policy	Yes (1)	ConflictOfInterestPolicyInd
Annual Disclosure Covered Prsn	Yes (1)	AnnualDisclosureCoveredPrsnInd
Regular Monitoring Enfrc	Yes (1)	RegularMonitoringEnfrcInd
Whistleblower Policy	Yes (1)	WhistleblowerPolicyInd
Document Retention Policy	Yes (1)	DocumentRetentionPolicyInd
Compensation Process CEO	0	CompensationProcessCEOInd
Compensation Process Other	0	CompensationProcessOtherInd
Investment In Joint Venture	0	InvestmentInJointVentureInd
States Where Copy Of Return Is Fld	WA	StatesWhereCopyOfReturnIsFldCd
Upon Request	Yes (X)	UponRequestInd

Books In Care Of Detail BooksInCareOfDetail

Business Name BusinessName

Field	Value	IRS element (for citing)
Business Name Line1	ALIM PATTEN	BusinessNameLine1Txt

Field	Value	IRS element (for citing)
Phone	2066160035	PhoneNum

US Address USAddress

Field	Value	IRS element (for citing)
Address Line1	c/o Astronomy Dept Box 351580 UW	AddressLine1Txt
City	Seattle	CityNm
State Abbreviation	WA	StateAbbreviationCd
ZIP	981951202	ZIPCd

Form990 Part VII Section A Form990PartVIISectionAGrp (19 entries)

TitleTitleTxt	Average Hours Per WeekAverageHoursPerWeekRt	Individual Trustee Or DirectorIndividualTrusteeOrDirectorInd	OfficerOfficerInd	Reportable Comp From OrgReportableCompFromOrgAmt	Reportable Comp From Rltd OrgReportableCompFromRltdOrgAmt	Other CompensationOtherCompensationAmt
Michael Crenshaw
Board Chair	4.00	Yes (X)	Yes (X)	$12,500	$0	$0
Henry Chip Kobulnicky
Secretary and Treasurer	1.00	Yes (X)	Yes (X)	$0	$0	$0
Suzanne Hawley
Trustee	1.00	Yes (X)		$0	$0	$0
Daniel Pollack
Trustee	0.90	Yes (X)		$0	$0	$0
Michele Shuster
Trustee	0.90	Yes (X)		$0	$0	$0
Jon Holtzman
Trustee	0.90	Yes (X)		$0	$0	$0
Victor M Bright
Trustee	0.90	Yes (X)		$0	$0	$0
Jeremy Darling
Trustee	0.50	Yes (X)		$0	$0	$0
Laura Galloway
Trustee	0.40	Yes (X)		$0	$0	$0
Steve Majewski
Trustee	0.50	Yes (X)		$0	$0	$0
Bertrand Garcia-Moreno
Trustee	0.10	Yes (X)		$0	$0	$0
Rosemary F G Wyse
Trustee	1.50	Yes (X)		$0	$0	$0
Donald Hamelberg
Trustee	0.10	Yes (X)		$0	$0	$0
Georgia Kosmopoulou
Trustee	0.10	Yes (X)		$0	$0	$0
Karen Leighly
Trustee	0.30	Yes (X)		$0	$0	$0
Parag Chitnis
Trustee	0.10	Yes (X)		$0	$0	$0
Eric Hintz
Trustee	0.60	Yes (X)		$0	$0	$0
Aleksandr Mosenkov
Trustee	0.90	Yes (X)		$0	$0	$0
Alim Patten
Business Manager	50.00		Yes (X)	$116,354	$0	$26,934

Field	Value	IRS element (for citing)
Total Reportable Comp From Org	$128,854	TotalReportableCompFromOrgAmt
Tot Reportable Comp Rltd Org	$0	TotReportableCompRltdOrgAmt
Total Other Compensation	$26,934	TotalOtherCompensationAmt
Indiv Rcvd Greater Than100 K	1	IndivRcvdGreaterThan100KCnt
Former Ofcr Employees Listed	0	FormerOfcrEmployeesListedInd
Total Comp Greater Than150 K	0	TotalCompGreaterThan150KInd
Compensation From Other Srcs	Yes (1)	CompensationFromOtherSrcsInd

Contractor Compensation ContractorCompensationGrp (5 entries)

Address Line1ContractorAddress/USAddress/AddressLine1Txt	CityContractorAddress/USAddress/CityNm	State AbbreviationContractorAddress/USAddress/StateAbbreviationCd	ZIPContractorAddress/USAddress/ZIPCd	ServicesServicesDesc	CompensationCompensationAmt
New Mexico St Univ
Astronomy Dept 30001 Dept 4500	Las Cruces	NM	88003	Observatory Operations Support	$2,923,475
University of Washington
Box 351580 Astronomy Dept	Seattle	WA	98195	Observatory Operations Support	$1,052,471
Carnegie Institution
813 Santa Barbara Street	Pasadena	CA	91101	Observatory Operations Support	$808,846
University of Utah
201 S Presidents Circle Rm 406	Salt Lake City	UT	84112	Observatory Operations Support	$311,270
Johns Hopkins University
3400 N Charles Street	Baltimore	MD	21218	Observatory Operations Support	$217,883

Field	Value	IRS element (for citing)
Cntrct Rcvd Greater Than100 K	8	CntrctRcvdGreaterThan100KCnt
Government Grants	$58,527	GovernmentGrantsAmt
Total Contributions	$58,527	TotalContributionsAmt

Program Service Revenue ProgramServiceRevenueGrp (3 entries)

DescDesc	BusinessBusinessCd	Total Revenue ColumnTotalRevenueColumnAmt	Related Or Exempt Func IncomeRelatedOrExemptFuncIncomeAmt
Member assessments	541700	$2,405,776	$2,405,776
Participant Fees	541700	$1,895,531	$1,895,531
Other Telescope Fees	541900	$257,492	$257,492

Field	Value	IRS element (for citing)
Total Program Service Revenue	$4,558,799	TotalProgramServiceRevenueAmt

Investment Income InvestmentIncomeGrp

Field	Value	IRS element (for citing)
Total Revenue Column	$642,885	TotalRevenueColumnAmt
Exclusion	$642,885	ExclusionAmt

Gross Amount Sales Assets GrossAmountSalesAssetsGrp

Field	Value	IRS element (for citing)
Securities	$2,206,790	SecuritiesAmt

Less Cost Oth Basis Sales Expnss LessCostOthBasisSalesExpnssGrp

Field	Value	IRS element (for citing)
Securities	$2,267,010	SecuritiesAmt

Gain Or Loss GainOrLossGrp

Field	Value	IRS element (for citing)
Securities	-$60,220	SecuritiesAmt

Net Gain Or Loss Investments NetGainOrLossInvestmentsGrp

Field	Value	IRS element (for citing)
Total Revenue Column	-$60,220	TotalRevenueColumnAmt
Exclusion	-$60,220	ExclusionAmt

Other Revenue Misc OtherRevenueMiscGrp (2 entries)

DescDesc	BusinessBusinessCd	Total Revenue ColumnTotalRevenueColumnAmt	Related Or Exempt Func IncomeRelatedOrExemptFuncIncomeAmt	ExclusionExclusionAmt
Telescope	900099	$7,666	$7,666
Cash Rewards	900099	$2,900		$2,900

Field	Value	IRS element (for citing)
Other Revenue Total	$10,566	OtherRevenueTotalAmt

Total Revenue TotalRevenueGrp

Field	Value	IRS element (for citing)
Total Revenue Column	$5,210,557	TotalRevenueColumnAmt
Related Or Exempt Func Income	$4,566,465	RelatedOrExemptFuncIncomeAmt
Unrelated Business Revenue	$0	UnrelatedBusinessRevenueAmt
Exclusion	$585,565	ExclusionAmt

Comp Current Ofcr Directors CompCurrentOfcrDirectorsGrp

Field	Value	IRS element (for citing)
Total	$155,788	TotalAmt
Management And General	$155,788	ManagementAndGeneralAmt

Other Salaries And Wages OtherSalariesAndWagesGrp

Field	Value	IRS element (for citing)
Total	$2,410,532	TotalAmt
Program Services	$2,259,454	ProgramServicesAmt
Management And General	$151,078	ManagementAndGeneralAmt

Other Employee Benefits OtherEmployeeBenefitsGrp

Field	Value	IRS element (for citing)
Total	$671,962	TotalAmt
Program Services	$671,962	ProgramServicesAmt

Fees For Services Accounting FeesForServicesAccountingGrp

Field	Value	IRS element (for citing)
Total	$60,425	TotalAmt
Management And General	$60,425	ManagementAndGeneralAmt

Fees For Srvc Invst Mgmnt Fees FeesForSrvcInvstMgmntFeesGrp

Field	Value	IRS element (for citing)
Total	$33,226	TotalAmt
Management And General	$33,226	ManagementAndGeneralAmt

Office Expenses OfficeExpensesGrp

Field	Value	IRS element (for citing)
Total	$93,082	TotalAmt
Program Services	$90,926	ProgramServicesAmt
Management And General	$2,156	ManagementAndGeneralAmt

Occupancy OccupancyGrp

Field	Value	IRS element (for citing)
Total	$2,003,774	TotalAmt
Program Services	$2,003,774	ProgramServicesAmt

Travel TravelGrp

Field	Value	IRS element (for citing)
Total	$64,892	TotalAmt
Program Services	$64,892	ProgramServicesAmt

Depreciation Depletion DepreciationDepletionGrp

Field	Value	IRS element (for citing)
Total	$5,623,511	TotalAmt
Program Services	$5,623,511	ProgramServicesAmt

Insurance InsuranceGrp

Field	Value	IRS element (for citing)
Total	$47,335	TotalAmt
Management And General	$47,335	ManagementAndGeneralAmt

All Other Expenses AllOtherExpensesGrp

Field	Value	IRS element (for citing)
Total	$11,299	TotalAmt
Management And General	$11,299	ManagementAndGeneralAmt

Total Functional Expenses TotalFunctionalExpensesGrp

Field	Value	IRS element (for citing)
Total	$11,175,826	TotalAmt
Program Services	$10,714,519	ProgramServicesAmt
Management And General	$461,307	ManagementAndGeneralAmt
Fundraising	$0	FundraisingAmt

Cash Non Interest Bearing CashNonInterestBearingGrp

Field	Value	IRS element (for citing)
BOY	$16,012,341	BOYAmt
EOY	$14,663,633	EOYAmt

Savings And Temp Cash Invst SavingsAndTempCashInvstGrp

Field	Value	IRS element (for citing)
BOY	$3,168,742	BOYAmt
EOY	$2,945,840	EOYAmt

Field	Value	IRS element (for citing)
Land Bldg Equip Cost Or Other Bss	$105,469,045	LandBldgEquipCostOrOtherBssAmt
Land Bldg Equip Accum Deprec	$89,233,082	LandBldgEquipAccumDeprecAmt

Land Bldg Equip Basis Net LandBldgEquipBasisNetGrp

Field	Value	IRS element (for citing)
BOY	$20,704,117	BOYAmt
EOY	$16,235,963	EOYAmt

Investments Pub Traded Sec InvestmentsPubTradedSecGrp

Field	Value	IRS element (for citing)
BOY	$798,995	BOYAmt
EOY	$830,395	EOYAmt

Total Assets TotalAssetsGrp

Field	Value	IRS element (for citing)
BOY	$40,684,195	BOYAmt
EOY	$34,675,831	EOYAmt

Deferred Revenue DeferredRevenueGrp

Field	Value	IRS element (for citing)
BOY	$3,106,723	BOYAmt
EOY	$3,028,595	EOYAmt

Total Liabilities TotalLiabilitiesGrp

Field	Value	IRS element (for citing)
BOY	$3,106,723	BOYAmt
EOY	$3,028,595	EOYAmt

Field	Value	IRS element (for citing)
Organization Follows FASB117	Yes (X)	OrganizationFollowsFASB117Ind

No Donor Restriction Net Assets NoDonorRestrictionNetAssetsGrp

Field	Value	IRS element (for citing)
BOY	$17,748,229	BOYAmt
EOY	$6,291,235	EOYAmt

Donor Restriction Net Assets DonorRestrictionNetAssetsGrp

Field	Value	IRS element (for citing)
BOY	$19,829,243	BOYAmt
EOY	$25,356,001	EOYAmt

Total Net Assets Fund Balance TotalNetAssetsFundBalanceGrp

Field	Value	IRS element (for citing)
BOY	$37,577,472	BOYAmt
EOY	$31,647,236	EOYAmt

Tot Liab Net Assets Fund Balance TotLiabNetAssetsFundBalanceGrp

Field	Value	IRS element (for citing)
BOY	$40,684,195	BOYAmt
EOY	$34,675,831	EOYAmt

Field	Value	IRS element (for citing)
Reconcilation Revenue Expnss	-$5,965,269	ReconcilationRevenueExpnssAmt
Net Unrlzd Gains Losses Invst	$35,033	NetUnrlzdGainsLossesInvstAmt
Other Changes In Net Assets	$0	OtherChangesInNetAssetsAmt
Method Of Accounting Other	Yes (X)	MethodOfAccountingOtherInd
Accountant Compile Or Review	0	AccountantCompileOrReviewInd
FS Audited	Yes (1)	FSAuditedInd

FS Audited Basis FSAuditedBasisGrp

Field	Value	IRS element (for citing)
Separate Basis Fincl Stmt	Yes (X)	SeparateBasisFinclStmtInd

Field	Value	IRS element (for citing)
Audit Committee	Yes (1)	AuditCommitteeInd
Federal Grant Audit Required	Yes (1)	FederalGrantAuditRequiredInd
Federal Grant Audit Performed	Yes (1)	FederalGrantAuditPerformedInd

Schedule A IRS990ScheduleA

Field	Value	IRS element (for citing)
Public Organization170	Yes (X)	PublicOrganization170Ind

Gifts Grants Contri Rcvd170 GiftsGrantsContriRcvd170Grp

Field	Value	IRS element (for citing)
Current Tax Year Minus4 Years	$933,492	CurrentTaxYearMinus4YearsAmt
Current Tax Year Minus3 Years	$5,631,981	CurrentTaxYearMinus3YearsAmt
Current Tax Year Minus2 Years	$9,588,120	CurrentTaxYearMinus2YearsAmt
Current Tax Year Minus1 Year	$3,323,812	CurrentTaxYearMinus1YearAmt
Current Tax Year	$58,527	CurrentTaxYearAmt
Total	$19,535,932	TotalAmt

Govt Furn Srvc Fclts Vl170 GovtFurnSrvcFcltsVl170Grp

Field	Value	IRS element (for citing)
Current Tax Year Minus4 Years	$726,346	CurrentTaxYearMinus4YearsAmt
Current Tax Year Minus3 Years	$660,520	CurrentTaxYearMinus3YearsAmt
Current Tax Year Minus2 Years	$466,941	CurrentTaxYearMinus2YearsAmt
Current Tax Year Minus1 Year	$263,698	CurrentTaxYearMinus1YearAmt
Current Tax Year	$135,664	CurrentTaxYearAmt
Total	$2,253,169	TotalAmt

Total Calendar Year170 TotalCalendarYear170Grp

Field	Value	IRS element (for citing)
Current Tax Year Minus4 Years	$1,659,838	CurrentTaxYearMinus4YearsAmt
Current Tax Year Minus3 Years	$6,292,501	CurrentTaxYearMinus3YearsAmt
Current Tax Year Minus2 Years	$10,055,061	CurrentTaxYearMinus2YearsAmt
Current Tax Year Minus1 Year	$3,587,510	CurrentTaxYearMinus1YearAmt
Current Tax Year	$194,191	CurrentTaxYearAmt
Total	$21,789,101	TotalAmt

Field	Value	IRS element (for citing)
Substantial Contributors Tot	$12,423,862	SubstantialContributorsTotAmt
Public Support Total170	$9,365,239	PublicSupportTotal170Amt

Gross Investment Income170 GrossInvestmentIncome170Grp

Field	Value	IRS element (for citing)
Current Tax Year Minus4 Years	$89,060	CurrentTaxYearMinus4YearsAmt
Current Tax Year Minus3 Years	$18,177	CurrentTaxYearMinus3YearsAmt
Current Tax Year Minus2 Years	$32,188	CurrentTaxYearMinus2YearsAmt
Current Tax Year Minus1 Year	$270,080	CurrentTaxYearMinus1YearAmt
Current Tax Year	$609,659	CurrentTaxYearAmt
Total	$1,019,164	TotalAmt

Other Income170 OtherIncome170Grp

Field	Value	IRS element (for citing)
Current Tax Year Minus4 Years	$12,402	CurrentTaxYearMinus4YearsAmt
Current Tax Year Minus3 Years	$122	CurrentTaxYearMinus3YearsAmt
Current Tax Year Minus2 Years	$2,225	CurrentTaxYearMinus2YearsAmt
Current Tax Year Minus1 Year	$2,525	CurrentTaxYearMinus1YearAmt
Current Tax Year	$2,900	CurrentTaxYearAmt
Total	$20,174	TotalAmt

Field	Value	IRS element (for citing)
Total Support	$22,828,439	TotalSupportAmt
Gross Receipts Rltd Activities	$18,214,096	GrossReceiptsRltdActivitiesAmt
Public Support CY170	0.41020	PublicSupportCY170Pct
Public Support PY170	0.37290	PublicSupportPY170Pct
Thirty Thr Pct Suprt Tests CY170	Yes (X)	ThirtyThrPctSuprtTestsCY170Ind

Schedule B IRS990ScheduleB

Contributor Information ContributorInformationGrp

Field	Value	IRS element (for citing)
Contributor	RESTRICTED	ContributorNum

Contributor Business Name ContributorBusinessName

Field	Value	IRS element (for citing)
Business Name Line1	RESTRICTED	BusinessNameLine1

Contributor US Address ContributorUSAddress

Field	Value	IRS element (for citing)
Address Line1	RESTRICTED	AddressLine1
Address Line2	RESTRICTED	AddressLine2
City	RESTRICTED	City
State	RESTRICTED	State
ZIP Code	RESTRICTED	ZIPCode

Field	Value	IRS element (for citing)
Total Contributions	RESTRICTED	TotalContributionsAmt

Schedule D IRS990ScheduleD

Buildings BuildingsGrp

Field	Value	IRS element (for citing)
Other Cost Or Other Basis	$105,369,045	OtherCostOrOtherBasisAmt
Depreciation	$89,133,082	DepreciationAmt
Book Value	$16,235,963	BookValueAmt

Equipment EquipmentGrp

Field	Value	IRS element (for citing)
Other Cost Or Other Basis	$100,000	OtherCostOrOtherBasisAmt
Depreciation	$100,000	DepreciationAmt
Book Value	$0	BookValueAmt

Field	Value	IRS element (for citing)
Total Book Value Land Buildings	$16,235,963	TotalBookValueLandBuildingsAmt
Total Rev Etc Audited Fincl Stmt	$6,218,015	TotalRevEtcAuditedFinclStmtAmt
Net Unrealized Gains Invst	$35,033	NetUnrealizedGainsInvstAmt
Donated Services And Use Fclts	$1,005,651	DonatedServicesAndUseFcltsAmt
Revenue Not Reported	$1,040,684	RevenueNotReportedAmt
Revenue Subtotal	$5,177,331	RevenueSubtotalAmt
Investment Expenses Not Incld	$33,226	InvestmentExpensesNotIncldAmt
Revenue Not Reported Fincl Stmt	$33,226	RevenueNotReportedFinclStmtAmt
Total Revenue Per Form990	$5,210,557	TotalRevenuePerForm990Amt
Tot Expns Etc Audited Fincl Stmt	$12,148,251	TotExpnsEtcAuditedFinclStmtAmt
Donated Services Use Fclts	$1,005,651	DonatedServicesUseFcltsAmt
Expenses Not Reported	$1,005,651	ExpensesNotReportedAmt
Expenses Subtotal	$11,142,600	ExpensesSubtotalAmt
Investment Expenses Not Incld2	$33,226	InvestmentExpensesNotIncld2Amt
Expenses Not Rpt Fincl Stmt	$33,226	ExpensesNotRptFinclStmtAmt
Total Expenses Per Form990	$11,175,826	TotalExpensesPerForm990Amt

Schedule F IRS990ScheduleF

Account Activities Outside US AccountActivitiesOutsideUSGrp (6 entries)

RegionRegionTxt	EmployeeEmployeeCnt	Type Of Activities ConductedTypeOfActivitiesConductedTxt	Specific Services ProvidedSpecificServicesProvidedTxt	Region Total ExpendituresRegionTotalExpendituresAmt
South America	2	Program services	Support for LCO SDSS-V program	$586,235
East Asia and the Pacific	1	Program services	Support for APO (3.5m and SDSS-V)	$8,865
Europe (including Iceland and Greenland)	4	Program services	Support for SDSS-IV & SDSS-V programs	$204,648
North America	1	Program services	Support for APO (3.5m and SDSS-V)	$6,456
Middle East and North Africa	0	Program services	Support for SDSS-V program	$1,000
South Asia	0	Program services	Support for SDSS-V program	$1,000

Field	Value	IRS element (for citing)
Subtotal Offices	0	SubtotalOfficesCnt
Subtotal Employees	8	SubtotalEmployeesCnt
Continuation Total Office	0	ContinuationTotalOfficeCnt
Continuation Total Employee	0	ContinuationTotalEmployeeCnt
Total Office	0	TotalOfficeCnt
Total Employee	8	TotalEmployeeCnt
Subtotal Spent	$808,204	SubtotalSpentAmt
Continuation Spent	$0	ContinuationSpentAmt
Total Spent	$808,204	TotalSpentAmt
Transfer To Foreign Corp	0	TransferToForeignCorpInd
Interest In Foreign Trust	0	InterestInForeignTrustInd
Foreign Corp Ownership	0	ForeignCorpOwnershipInd
Passive Foreign Investmest Co	0	PassiveForeignInvestmestCoInd
Foreign Partnership	0	ForeignPartnershipInd
Boycott Countries	0	BoycottCountriesInd

Supplemental Information Detail SupplementalInformationDetail

Field	Value	IRS element (for citing)
Form And Line Reference	Part I, line 3:	FormAndLineReferenceDesc
Explanation	THE MODIFIED CASH METHOD WAS USED IN ACCOUNTING FOR EXPENDITURES IN PART I.	ExplanationTxt

Schedule J IRS990ScheduleJ

Field	Value	IRS element (for citing)
Severance Payment	0	SeverancePaymentInd
Supplemental Nonqual Rtr Plan	0	SupplementalNonqualRtrPlanInd
Equity Based Comp Arrngm	0	EquityBasedCompArrngmInd
Comp Based On Revenue Of Flng Org	0	CompBasedOnRevenueOfFlngOrgInd
Comp Bsd On Rev Related Orgs	0	CompBsdOnRevRelatedOrgsInd
Comp Bsd Net Earns Flng Org	0	CompBsdNetEarnsFlngOrgInd
Comp Bsd Net Earns Rltd Orgs	0	CompBsdNetEarnsRltdOrgsInd
Any Non Fixed Payments	0	AnyNonFixedPaymentsInd
Initial Contract Exception	0	InitialContractExceptionInd

Rltd Org Officer Trst Key Empl RltdOrgOfficerTrstKeyEmplGrp

Field	Value	IRS element (for citing)
Person	Alim Patten	PersonNm
Title	Business Manager	TitleTxt
Base Compensation Filing Org	$116,354	BaseCompensationFilingOrgAmt
Compensation Based On Rltd Orgs	$0	CompensationBasedOnRltdOrgsAmt
Bonus Filing Organization	$0	BonusFilingOrganizationAmount
Bonus Related Organizations	$0	BonusRelatedOrganizationsAmt
Other Compensation Filing Org	$0	OtherCompensationFilingOrgAmt
Other Compensation Rltd Orgs	$0	OtherCompensationRltdOrgsAmt
Deferred Compensation Flng Org	$0	DeferredCompensationFlngOrgAmt
Deferred Comp Rltd Orgs	$0	DeferredCompRltdOrgsAmt
Nontaxable Benefits Filing Org	$26,934	NontaxableBenefitsFilingOrgAmt
Nontaxable Benefits Rltd Orgs	$0	NontaxableBenefitsRltdOrgsAmt
Total Compensation Filing Org	$143,288	TotalCompensationFilingOrgAmt
Total Compensation Rltd Orgs	$0	TotalCompensationRltdOrgsAmt
Comp Report Prior990 Filing Org	$0	CompReportPrior990FilingOrgAmt
Comp Report Prior990 Rltd Orgs	$0	CompReportPrior990RltdOrgsAmt

Supplemental Information Detail SupplementalInformationDetail

Field	Value	IRS element (for citing)
Form And Line Reference	Schedule J, Part I, #3 and Part II:	FormAndLineReferenceDesc
Explanation	Alim Patten receives compensation and benefits for her work with Astrophysical Research Consortium (ARC) from the University of Washington (UW), an unrelated exempt organization. ARC reimburses UW for her compensation and benefits. Alim Patten also participates in the University of Washington's defined-benefit pension plan. The organization has made reasonable efforts to obtain the annual value of this pension plan, but the value is not available.	ExplanationTxt

Schedule O IRS990ScheduleO

Supplemental Information Detail SupplementalInformationDetail (7 entries)

Form And Line ReferenceFormAndLineReferenceDesc	ExplanationExplanationTxt
Form 990, Part I, Line 6, Volunteers:	The volunteers are the board members.
Form 990, Part VI, Section A, line 6	ARC is a consortium consisting of nine member universities in 2024.
Form 990, Part VI, Section A, line 7a	Each member of ARC has two representatives on the Board of Governors, who are appointed by the member institution's academic administration.
Form 990, Part VI, Section A, line 7b	Members have approval rights in accordance with the WA Nonprofit Corporation Act, Chapter 24.03A RCW.
Form 990, Part VI, Section B, line 11b	Each member of the Board of Governors is given a copy of the Form 990 prior to its submission.
Form 990, Part VI, Section B, line 12c	All Board members and officers of ARC are covered by a Conflict of Interest Policy. There are bi-annual reviews of the individual Conflict of Interest statements by the governance committee, which determines whether a conflict exists. All statements are kept on file. Board members are expected to disclose conflicts as they may arise on the honor system, with the oversight of the governance committee. If a conflict exists or arises during the course of the business, the governance committee investigates and determines any action to take in accordance with the policy. This may include a member being prohibited from participating in the deliberations and decisions with respect to the transaction.
Form 990, Part VI, Section C, line 19	ARC makes governing documents available to the public upon request.