Liabilities / Assets
19th percentile
Tied with the lowest-debt nonprofits in its peer group.
MDM Observatory Consortium Inc
EIN 02-0513199 • 501(c)3 • Hanover, NH
Profile
MDM Observatory Consortium, Inc.'s mission is to provide opportunities for education and research in the fields of astronomy and astrophysics; to promote and advance the studies of astronomy, astrophysics and related fields; to own, lease, operate, acquire, purchase, dispose of, transfer, sell and otherwise deal with facilities appropriate to the foregoing purposes including without limitation, observatories, telescopes, and other items.
Refreshing map…
Siviq Scores
Precomputed percentiles relative to similar nonprofits. These scores are descriptive rather than judgmental.
0.00x
Liabilities / Revenue
20th percentile
Tied with the lowest-debt nonprofits in its peer group.
Net Margin
72nd percentile
Higher net margin than 72% of similar nonprofits.
Top Officer Pay
40th percentile
Higher top officer pay than 40% of similar nonprofits.
Top officer pay equals 0.0% of source-year revenue.
Asset Growth
59th percentile
Faster asset growth than 59% of similar nonprofits.
Revenue Growth
20th percentile
Faster revenue growth than 20% of similar nonprofits.
Balance Sheet
Assets
Up$1,697,884
Up $111,748 (+7.0%) from 2024
Liabilities
Flat$0
Flat from 2024
Net Assets
Up$1,697,884
Up $111,748 (+7.0%) from 2024
Revenue
Down$577,696
Down $91,661 (-14%) from 2024
Expenses
Down$465,947
Down $76,227 (-14%) from 2024
Net Income
Down$111,749
Down $15,434 (-12%) from 2024
Trend Graphs
Filings
Most recent year
2025 • Form 990Facts available. Structured filing facts are available, but richer extracted sections are limited.
- Assets
- $1,697,884
- Liabilities
- $0
- Net assets
- $1,697,884
- Revenue
- $577,696
- Expenses
- $465,947
- Net income
- $111,749
Latest Filing Detail
Jump To
Filing Snapshot
- Filing Period
- Jul 1, 2024 to Jun 30, 2025
- Signed
- Nov 13, 2025
- Return Version
- 2024v5.1
- Gross Receipts
- $577,696
Mission and Program Overview
Mission
MDM Observatory Consortium Inc.'s mission is to provide opportunities for education and research in the fields of astronomy and astrophysics; to promote and advance the studies of astronomy, astrophysics, and related fields; to own, lease, operate, acquire, purchase, dispose of, transfer, sell and otherwise deal with facilities appropriate to the foregoing purposes including without limitation, observatories, telescopes, and other items.
To provide opportunities for education and research in the fields of astronomy and astrophysics.
Balance Sheet Detail
| Line | Beginning | End | Change |
|---|---|---|---|
| Assets | |||
| Accounts Receivable | $1,486,763 | $1,620,821 | ▲ $134,058 |
| Land, Buildings, and Equipment, Net | $94,373 | $72,063 | ▼ $22,310 |
| Cash and Non-Interest-Bearing Accounts | $5,000 | $5,000 | → $0 |
| Savings and Temporary Cash Investments | $0 | - | - |
| Other Notes and Loans Receivable, Net | $0 | - | - |
| Pledges and Grants Receivable | $0 | - | - |
| Receivable From Disqualified Prsn | $0 | $0 | → $0 |
| Receivables From Officers Etc | $0 | $0 | → $0 |
| Investments Other Securities | $0 | - | - |
| Investments Program Related | $0 | - | - |
| Investments in Publicly Traded Securities | $0 | - | - |
| Intangible Assets | $0 | - | - |
| Inventories for Sale or Use | $0 | - | - |
| Loans From Officers Directors | $0 | $0 | → $0 |
| Prepaid Expenses and Deferred Charges | $0 | - | - |
| Total Assets | $1,586,136 | $1,697,884 | ▲ $111,748 |
| Other Assets Total | $0 | $0 | → $0 |
| Liabilities | |||
| Accounts Payable and Accrued Expenses | $0 | - | - |
| Grants Payable | $0 | - | - |
| Mortgage Notes Payable Secured by Investment Property | $0 | - | - |
| Unsecured Notes Loans Payable | $0 | - | - |
| Other Liabilities | $0 | $0 | → $0 |
| Deferred Revenue | $0 | - | - |
| Escrow Account Liability | $0 | - | - |
| Tax Exempt Bond Liabilities | $0 | - | - |
| Total Liabilities | $0 | $0 | → $0 |
| Net Assets / Fund Balance | |||
| Net Assets Without Donor Restrictions | $1,586,136 | $1,697,884 | ▲ $111,748 |
| Net Assets With Donor Restrictions | $0 | - | - |
| Total Net Assets Fund Balance | $1,586,136 | $1,697,884 | ▲ $111,748 |
| Total Liabilities and Net Assets / Fund Balance | $1,586,136 | $1,697,884 | ▲ $111,748 |
Asset Categories
| Asset | Book Value | Depreciation | Basis |
|---|---|---|---|
| Equipment | $57,829 | $3,456,598 | $3,514,427 |
| Buildings | $14,234 | $1,029,029 | $1,043,263 |
Compensation and Service Providers
Board Members and Trustees
| Name | Title |
|---|---|
| John Thorstensen | President/Trustee |
| Jules Halpern | Secretary/Trustee |
| Christopher Miller | Trustee |
| Douglas Clowe | Trustee |
| Krzysztof Stanek | Trustee |
| Kate Soule | Treasurer |
Highest Paid Contractors
| Contractor | Services | Location | Compensation |
|---|---|---|---|
| University of Michigan | Personnel Services | West Hall 1085 S University, Ann Arbor, MI 48109-1107 | $137,063 |
Revenue and Support
Revenue Composition
- Contributions and Grants
- $0
- Program Service Revenue
- $504,840
- Investment Income
- $72,856
- Other Revenue
- $0
- Change in Net Assets
- $111,749
Expenses and Functional Allocation
Major Expense Lines
| Line Item | Amount |
|---|---|
| Other Expenses | $465,947 |
| Grants and Similar Amounts Paid | $0 |
| Professional Fundraising Fees | $0 |
| Salaries, Compensation, and Employee Benefits | $0 |
| Total Fundraising Expense | $0 |
Functional Expense Allocation
| Line Item | Program | Management | Fundraising | Total |
|---|---|---|---|---|
| Insurance | $173,411 | - | - | $173,411 |
| Fees for Services Other | $171,142 | $0 | $0 | $171,142 |
| Office Expenses | $45,234 | - | - | $45,234 |
| Occupancy | $28,695 | - | - | $28,695 |
| Other Expenses | $23,757 | - | - | $23,757 |
| Depreciation Depletion | $22,310 | - | - | $22,310 |
| Travel | $1,398 | - | - | $1,398 |
| Total Functional Expenses | $465,947 | $0 | $0 | $465,947 |
Fundraising, Events, and Gaming
- Fundraising activities
- No
- Gaming activities
- No
- Professional fundraiser used
- No
Fundraising and Gaming Totals
| Line Item | Amount |
|---|---|
| Professional Fundraising Fees | $0 |
Political and Lobbying Activity
- Political campaign activity
- No
- Lobbying activity
- No
- Subject to proxy tax
- No
Insider Transactions and Loans
Loans and Receivables
| Line Item | Beginning | End | Change |
|---|---|---|---|
| Loans from Officers, Directors, Trustees, and Key Employees | $0 | $0 | → $0 |
| Receivables from Disqualified Persons | $0 | $0 | → $0 |
| Receivables from Officers, Directors, Trustees, and Key Employees | $0 | $0 | → $0 |
Governance and Compliance
Governance Checklist
- Compiled or reviewed by an accountant
- No
- Annual disclosure for covered persons
- Yes
- Business relationship with 35% controlled entity
- No
- Business relationship with family members
- No
- Business relationship with organization members
- No
- Material changes to governing documents
- No
- Compensation from other sources disclosed
- No
- CEO compensation reviewed
- No
- Other officer compensation reviewed
- No
- Conflict-of-interest policy
- Yes
- Audited financial statements prepared
- No
- Key decisions subject to board approval
- No
- Management duties delegated
- No
Governance Explanations
Form 990, Part VI, Line 6 Classes of members or stockholders
“Membership of the Corporation is made up of the following: Dartmouth College (25%), The Ohio State University (25%), Columbia University (25%), University of Michigan (17%) and Ohio University (8%).”
Form 990, Part VI, Line 7A Members or stockholders electing members of governing body
“At the annual meeting, each member appoints one person as a trustee of the corporation. The trustee is a faculty member of the member University, appointed by a Provost, Dean or Vice President of the member University.”
Form 990, Part VI, Line 8B Documentation of meetings held by committees of governing body
“The organization did not form any committee with the authority to act on behalf of the governing body.”
Form 990, Part VI, Line 11B Review of form 990 by governing body
“Form 990 is prepared by personnel in the Controller's Office of Dartmouth College, one of the Corporation's member institutions. Prior to the return being filed, a draft of the completed Form 990 is sent to the Treasurer of the Corporation. The Treasurer of the Corporation meets with the Controller's Office personnel to review the draft 990, the process by which it was prepared and to discuss items of significance, and resolve any questions. Prior to filing, the 990 is sent to the full board.”
Form 990, Part VI, Line 12C Conflict of interest policy
“Potential conflicts of interest are discussed by officers and directors prior to engaging in transactions for significant purchases of equipment or services. In addition, a report of any family or business relationships is required of all officers and directors annually. The Treasurer of the Corporation reviews all reports.”
Form 990, Part VI, Line 19 Required documents available to the public
“Governing documents and conflict of interest policy are available upon request from the Treasurer of the Corporation.”
Filing and Contact Details
Filer
- Filer Name
- MDM Observatory Consortium Inc
- EIN
- 02-0513199
- Phone
- 6036463011
- Address
- c/o Dartmouth 7 Lebanon St No 302, Hanover, NH 03755
Signing Officer
- Name
- Kate Soule
- Title
- Treasurer
- Signed
- 2025-11-13
Organization Details
- Formed
- 1998
- Legal Domicile
- Nh
- Voting Board Members
- 5
- Independent Board Members
- 5
- Employees
- 0
- Volunteers
- 6
Supplemental Narrative
Additional Explanations
Form 990, Part IX, Line 11G Other Fees
“Personnel Services - Total Expense: 137063, Program Service Expense: 137063, Management and General Expenses: , Fundraising Expenses: ; Technical Support - Total Expense: 34079, Program Service Expense: 34079, Management and General Expenses: , Fundraising Expenses: ;”
Form 990, Part XI, Line 9 Other changes in net assets or fund balances
“ROUNDING - -1; Total - -1;”
Raw XML AppendixShowing 400 of 409 raw XML fields
This appendix keeps the raw XML leaves available for debugging and edge-case review. The human report above is the primary experience.
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| IRS990/OthNotesLoansReceivableNetGrp/BOYAmt | 0 | 0 |
| IRS990/PartialLiquidationInd | 0 | false |
| IRS990/PayPremiumsPrsnlBnftCntrctInd | 0 | false |
| IRS990/PledgesAndGrantsReceivableGrp/BOYAmt | 0 | 0 |
| IRS990/PoliciesReferenceChaptersInd | 0 | false |
| IRS990/PoliticalCampaignActyInd | 0 | false |
| IRS990/PrepaidExpensesDefrdChargesGrp/BOYAmt | 0 | 0 |
| IRS990/PrincipalOfcrBusinessName/BusinessNameLine1Txt | 0 | John Thorstensen |
| IRS990/ProfessionalFundraisingInd | 0 | false |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 0 | 541900 |
| IRS990/ProgramServiceRevenueGrp/Desc | 0 | Memberships |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 0 | 504840 |
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| IRS990/ProhibitedTaxShelterTransInd | 0 | false |
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| IRS990/PYExcessBenefitTransInd | 0 | false |
| IRS990/PYInvestmentIncomeAmt | 0 | 82068 |
| IRS990/PYOtherExpensesAmt | 0 | 542174 |
| IRS990/PYProgramServiceRevenueAmt | 0 | 587289 |
| IRS990/PYRevenuesLessExpensesAmt | 0 | 127183 |
| IRS990/PYTotalExpensesAmt | 0 | 542174 |
| IRS990/PYTotalRevenueAmt | 0 | 669357 |
| IRS990/QuidProQuoContributionsInd | 0 | false |
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| IRS990/RcvFndsToPayPrsnlBnftCntrctInd | 0 | false |
| IRS990/ReceivablesFromOfficersEtcGrp/BOYAmt | 0 | 0 |
| IRS990/ReceivablesFromOfficersEtcGrp/EOYAmt | 0 | 0 |
| IRS990/ReconcilationRevenueExpnssAmt | 0 | 111749 |
| IRS990/RegularMonitoringEnfrcInd | 0 | true |
| IRS990/RelatedEntityInd | 0 | false |
| IRS990/RelatedOrganizationCtrlEntInd | 0 | false |
| IRS990/RentalIncomeOrLossGrp/PersonalAmt | 0 | 0 |
| IRS990/RentalIncomeOrLossGrp/RealAmt | 0 | 0 |
| IRS990/ReportInvestmentsOtherSecInd | 0 | false |
| IRS990/ReportLandBuildingEquipmentInd | 0 | true |
| IRS990/ReportOtherAssetsInd | 0 | false |
| IRS990/ReportOtherLiabilitiesInd | 0 | false |
| IRS990/ReportProgramRelatedInvstInd | 0 | false |
| IRS990/RevenueAmt | 0 | 504840 |
| IRS990/SavingsAndTempCashInvstGrp/BOYAmt | 0 | 0 |
| IRS990ScheduleA/CollegeOrganizationInd | 0 | X |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearAmt | 0 | 504840 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus1YearAmt | 0 | 587289 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 553860 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 513447 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 504984 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/TotalAmt | 0 | 2664420 |
| IRS990ScheduleA/GovtFurnSrvcFcltsVl170Grp/CurrentTaxYearAmt | 0 | 0 |
| IRS990ScheduleA/GovtFurnSrvcFcltsVl170Grp/CurrentTaxYearMinus1YearAmt | 0 | 0 |
| IRS990ScheduleA/GovtFurnSrvcFcltsVl170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 0 |
| IRS990ScheduleA/GovtFurnSrvcFcltsVl170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 0 |
| IRS990ScheduleA/GovtFurnSrvcFcltsVl170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 0 |
| IRS990ScheduleA/GovtFurnSrvcFcltsVl170Grp/TotalAmt | 0 | 0 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearAmt | 0 | 72856 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus1YearAmt | 0 | 82068 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 53476 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 4604 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 754 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/TotalAmt | 0 | 213758 |
| IRS990ScheduleA/GrossReceiptsRltdActivitiesAmt | 0 | 0 |
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| IRS990ScheduleA/OtherIncome170Grp/CurrentTaxYearMinus1YearAmt | 0 | 0 |
| IRS990ScheduleA/OtherIncome170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 0 |
| IRS990ScheduleA/OtherIncome170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 0 |
| IRS990ScheduleA/OtherIncome170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 0 |
| IRS990ScheduleA/OtherIncome170Grp/TotalAmt | 0 | 0 |
| IRS990ScheduleA/PublicSupportCY170Pct | 0 | 0.92573 |
| IRS990ScheduleA/PublicSupportPY170Pct | 0 | 0.94595 |
| IRS990ScheduleA/PublicSupportTotal170Amt | 0 | 2664420 |
| IRS990ScheduleA/SubstantialContributorsTotAmt | 0 | 0 |
| IRS990ScheduleA/TaxRevLeviedOrgnztnlBnft170Grp/CurrentTaxYearAmt | 0 | 0 |
| IRS990ScheduleA/TaxRevLeviedOrgnztnlBnft170Grp/CurrentTaxYearMinus1YearAmt | 0 | 0 |
| IRS990ScheduleA/TaxRevLeviedOrgnztnlBnft170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 0 |
| IRS990ScheduleA/TaxRevLeviedOrgnztnlBnft170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 0 |
| IRS990ScheduleA/TaxRevLeviedOrgnztnlBnft170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 0 |
| IRS990ScheduleA/TaxRevLeviedOrgnztnlBnft170Grp/TotalAmt | 0 | 0 |
| IRS990ScheduleA/ThirtyThrPctSuprtTestsCY170Ind | 0 | X |
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| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus1YearAmt | 0 | 587289 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 553860 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 513447 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 504984 |
| IRS990ScheduleA/TotalCalendarYear170Grp/TotalAmt | 0 | 2664420 |
| IRS990ScheduleA/TotalSupportAmt | 0 | 2878178 |
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| IRS990ScheduleA/UnrelatedBusinessNetIncm170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 0 |
| IRS990ScheduleA/UnrelatedBusinessNetIncm170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 0 |
| IRS990ScheduleA/UnrelatedBusinessNetIncm170Grp/TotalAmt | 0 | 0 |
| IRS990/ScheduleBRequiredInd | 0 | false |
| IRS990ScheduleD/BuildingsGrp/BookValueAmt | 0 | 14234 |
| IRS990ScheduleD/BuildingsGrp/DepreciationAmt | 0 | 1029029 |
| IRS990ScheduleD/BuildingsGrp/OtherCostOrOtherBasisAmt | 0 | 1043263 |
| IRS990ScheduleD/EquipmentGrp/BookValueAmt | 0 | 57829 |
| IRS990ScheduleD/EquipmentGrp/DepreciationAmt | 0 | 3456598 |
| IRS990ScheduleD/EquipmentGrp/OtherCostOrOtherBasisAmt | 0 | 3514427 |
| IRS990ScheduleD/TotalBookValueLandBuildingsAmt | 0 | 72063 |
| IRS990/ScheduleJRequiredInd | 0 | false |
| IRS990/ScheduleORequiredInd | 0 | true |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 0 | Membership of the Corporation is made up of the following: Dartmouth College (25%), The Ohio State University (25%), Columbia University (25%), University of Michigan (17%) and Ohio University (8%). |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 1 | At the annual meeting, each member appoints one person as a trustee of the corporation. The trustee is a faculty member of the member University, appointed by a Provost, Dean or Vice President of the member University. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 2 | The organization did not form any committee with the authority to act on behalf of the governing body. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 3 | Form 990 is prepared by personnel in the Controller's Office of Dartmouth College, one of the Corporation's member institutions. Prior to the return being filed, a draft of the completed Form 990 is sent to the Treasurer of the Corporation. The Treasurer of the Corporation meets with the Controller's Office personnel to review the draft 990, the process by which it was prepared and to discuss items of significance, and resolve any questions. Prior to filing, the 990 is sent to the full board. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 4 | Potential conflicts of interest are discussed by officers and directors prior to engaging in transactions for significant purchases of equipment or services. In addition, a report of any family or business relationships is required of all officers and directors annually. The Treasurer of the Corporation reviews all reports. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 5 | Governing documents and conflict of interest policy are available upon request from the Treasurer of the Corporation. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 6 | Personnel Services - Total Expense: 137063, Program Service Expense: 137063, Management and General Expenses: , Fundraising Expenses: ; Technical Support - Total Expense: 34079, Program Service Expense: 34079, Management and General Expenses: , Fundraising Expenses: ; |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 7 | ROUNDING - -1; Total - -1; |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | Form 990, Part VI, Line 6 Classes of members or stockholders |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 1 | Form 990, Part VI, Line 7a Members or stockholders electing members of governing body |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 2 | Form 990, Part VI, Line 8b Documentation of meetings held by committees of governing body |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 3 | Form 990, Part VI, Line 11b Review of form 990 by governing body |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 4 | Form 990, Part VI, Line 12c Conflict of interest policy |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 5 | Form 990, Part VI, Line 19 Required documents available to the public |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 6 | Form 990, Part IX, Line 11g Other Fees |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 7 | Form 990, Part XI, Line 9 Other changes in net assets or fund balances |
| IRS990/SchoolOperatingInd | 0 | false |
| IRS990/SignificantChangeInd | 0 | false |
| IRS990/SignificantNewProgramSrvcInd | 0 | false |
| IRS990/SubjectToExcsTaxNetInvstIncInd | 0 | false |
| IRS990/SubjectToProxyTaxInd | 0 | false |
| IRS990/SubjToTaxRmnrtnExPrchtPymtInd | 0 | false |
| IRS990/TaxablePartyNotificationInd | 0 | false |
| IRS990/TaxExemptBondLiabilitiesGrp/BOYAmt | 0 | 0 |
| IRS990/TaxExemptBondsInd | 0 | false |
| IRS990/TerminateOperationsInd | 0 | false |
| IRS990/TotalAssetsBOYAmt | 0 | 1586136 |
| IRS990/TotalAssetsEOYAmt | 0 | 1697884 |
| IRS990/TotalAssetsGrp/BOYAmt | 0 | 1586136 |
| IRS990/TotalAssetsGrp/EOYAmt | 0 | 1697884 |
| IRS990/TotalCompGreaterThan150KInd | 0 | false |
| IRS990/TotalContributionsAmt | 0 | 0 |
| IRS990/TotalEmployeeCnt | 0 | 0 |
| IRS990/TotalFunctionalExpensesGrp/FundraisingAmt | 0 | 0 |
| IRS990/TotalFunctionalExpensesGrp/ManagementAndGeneralAmt | 0 | 0 |
| IRS990/TotalFunctionalExpensesGrp/ProgramServicesAmt | 0 | 465947 |
| IRS990/TotalFunctionalExpensesGrp/TotalAmt | 0 | 465947 |
| IRS990/TotalGrossUBIAmt | 0 | 0 |
| IRS990/TotalLiabilitiesBOYAmt | 0 | 0 |
| IRS990/TotalLiabilitiesEOYAmt | 0 | 0 |
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| IRS990/TotalLiabilitiesGrp/EOYAmt | 0 | 0 |
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| IRS990/TotalNetAssetsFundBalanceGrp/EOYAmt | 0 | 1697884 |
| IRS990/TotalOtherCompensationAmt | 0 | 0 |
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| IRS990/TotalRevenueGrp/TotalRevenueColumnAmt | 0 | 577696 |
| IRS990/TotalRevenueGrp/UnrelatedBusinessRevenueAmt | 0 | 0 |
| IRS990/TotalVolunteersCnt | 0 | 6 |
| IRS990/TotLiabNetAssetsFundBalanceGrp/BOYAmt | 0 | 1586136 |
| IRS990/TotLiabNetAssetsFundBalanceGrp/EOYAmt | 0 | 1697884 |
| IRS990/TotReportableCompRltdOrgAmt | 0 | 0 |
| IRS990/TransactionWithControlEntInd | 0 | false |
| IRS990/TravelGrp/ProgramServicesAmt | 0 | 1398 |
| IRS990/TravelGrp/TotalAmt | 0 | 1398 |
| IRS990/TrnsfrExmptNonChrtblRltdOrgInd | 0 | false |
| IRS990/TypeOfOrganizationCorpInd | 0 | X |
| IRS990/UnrelatedBusIncmOverLimitInd | 0 | false |
| IRS990/UnsecuredNotesLoansPayableGrp/BOYAmt | 0 | 0 |
| IRS990/UponRequestInd | 0 | X |
| IRS990/USAddress/AddressLine1Txt | 0 | c/o Dartmouth 7 Lebanon St No 302 |
| IRS990/USAddress/CityNm | 0 | Hanover |
| IRS990/USAddress/StateAbbreviationCd | 0 | NH |
| IRS990/USAddress/ZIPCd | 0 | 03755 |
| IRS990/VotingMembersGoverningBodyCnt | 0 | 5 |
| IRS990/VotingMembersIndependentCnt | 0 | 5 |
| IRS990/WebsiteAddressTxt | 0 | http://mdm.kpno.noirlab.edu |
| IRS990/WhistleblowerPolicyInd | 0 | true |
| IRS990/WrittenPolicyOrProcedureInd | 0 | false |
| ReturnHeader/BuildTS | 0 | 2025-03-06 01:10:19Z |
| ReturnHeader/BusinessOfficerGrp/PersonNm | 0 | Kate Soule |
| ReturnHeader/BusinessOfficerGrp/PersonTitleTxt | 0 | Treasurer |
| ReturnHeader/BusinessOfficerGrp/SignatureDt | 0 | 2025-11-13 |
| ReturnHeader/Filer/BusinessName/BusinessNameLine1Txt | 0 | MDM Observatory Consortium Inc |
| ReturnHeader/Filer/BusinessNameControlTxt | 0 | MDMO |
| ReturnHeader/Filer/EIN | 0 | 020513199 |
| ReturnHeader/Filer/PhoneNum | 0 | 6036463011 |
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