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        <AdministrativeExpensesAmt>0</AdministrativeExpensesAmt>
        <EndYearBalanceAmt>316890</EndYearBalanceAmt>
      </CYMinus3YrEndwmtFundGrp>
      <CYMinus4YrEndwmtFundGrp>
        <BeginningYearBalanceAmt>320381</BeginningYearBalanceAmt>
        <ContributionsAmt>1978</ContributionsAmt>
        <InvestmentEarningsOrLossesAmt>6223</InvestmentEarningsOrLossesAmt>
        <GrantsOrScholarshipsAmt>0</GrantsOrScholarshipsAmt>
        <OtherExpendituresAmt>0</OtherExpendituresAmt>
        <AdministrativeExpensesAmt>0</AdministrativeExpensesAmt>
        <EndYearBalanceAmt>328582</EndYearBalanceAmt>
      </CYMinus4YrEndwmtFundGrp>
      <BoardDesignatedBalanceEOYPct>1</BoardDesignatedBalanceEOYPct>
      <PrmnntEndowmentBalanceEOYPct>0</PrmnntEndowmentBalanceEOYPct>
      <TermEndowmentBalanceEOYPct>0</TermEndowmentBalanceEOYPct>
      <EndowmentsHeldUnrelatedOrgInd>0</EndowmentsHeldUnrelatedOrgInd>
      <EndowmentsHeldRelatedOrgInd>0</EndowmentsHeldRelatedOrgInd>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule D, Part V, Line 4</FormAndLineReferenceDesc>
        <ExplanationTxt>The primary purpose for the ALPO Endowment Fund is to provide support for establishing a future, permanent brick and mortar home for our organization. A base of operations could support our volunteer staff by providing resources and assistance in managing their sections as well as better service to our dues paying members. This fund currently reinvest 70 percent of its annual dividends and interest for growth in the fund until such time that the fund can help support a permanent home for the ALPO. As a secondary purpose, the fund utilizes 30 percent of its annual dividends and interest to support current operations.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleD>
    <IRS990ScheduleO documentId="R000004" softwareId="24021167" softwareVersionNum="v1.00">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part IV, Line 2</FormAndLineReferenceDesc>
        <ExplanationTxt>No single contributor exceeded donations totaling $5,000 in 2024, therefore Schedule B was not filed.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section A, Line 1b</FormAndLineReferenceDesc>
        <ExplanationTxt>The ALPO Board of Directors and its officers receive no compensation. Therefore, if the term "compensation" is used as the single criteria for independence, all seven Board members are independent. If independence is defined as purely not holding an office in the corporation, then the ALPO only has four independent Board directors, not seven.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section A, Line 3</FormAndLineReferenceDesc>
        <ExplanationTxt>One former trustee, Jackie Buecher, resigned in December 2023. A replacement, Ronald Gafron, was elected to take her place after the reporting year ended in January 2025.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section A, Line 9</FormAndLineReferenceDesc>
        <ExplanationTxt>The following are the names and addresses of ALPO officers and directors. Kenneth T. Poshedly, Executive Director, Publications Coordinator, and Board Director, 1741 Bruckner Ct, Snellville, GA 30078-2784. Timothy J. Robertson, Associate Executive Director and Board Member, 195 Tierra Rejada Rd #148, Simi Valley, CA 93065-2930. Matthew L. Will, Secretary, Treasurer, and Board Director, PO Box 13456, Springfield, IL 62791-3456. Julius L. Benton, Jr. Board Director, PO Box 30545, Savannah, GA 31410-0545. Carl Hergenrother, Board Director, 4101 N Sunnywood Pl, Tucson, AZ 85749-9119. Sanjay Limaye, Board Director, Atmospheric Oceanic Space Bldg, University of Wisconsin, 1225 W Dayton St, Madison, WI 54706-1612. Richard W. Schmude, Jr., Board Director, 109 Tyus St, Barnesville, GA 30204-1637.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, Line 11b</FormAndLineReferenceDesc>
        <ExplanationTxt>The Secretary and Treasurer shares comprehensive financial data in a separate annual treasurer's report to the Board of Directors every February, covering the previous year. This gives the Board of Directors an opportunity to comment on finances before reporting begins. The Secretary and Treasurer incorporates financial data from the annual treasurer's report, into the Form 990. This process is performed personally and solely by the Secretary and Treasurer without assistance from any staff or professional services outside the organization.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, Line 12a</FormAndLineReferenceDesc>
        <ExplanationTxt>A conflict of interest policy was approved by the Board of Directors in 2020.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, Line 12b</FormAndLineReferenceDesc>
        <ExplanationTxt>The Board of Directors and the Board of Trustees are reminded of the Conflict of Interest policy. Potential conflict of interest situations for our all-volunteer staff are greatly reduced since no one is compensated for their work on behalf of the ALPO.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, Line 13</FormAndLineReferenceDesc>
        <ExplanationTxt>A whistleblower policy document was approved by the Board of Directors in 2020.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, Line 14</FormAndLineReferenceDesc>
        <ExplanationTxt>A document retention and destruction policy was approved by the Board of Directors in 2020.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, Line 15</FormAndLineReferenceDesc>
        <ExplanationTxt>The ALPO gives no compensation to any officers, directors, or staff and is an all-volunteer organization.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section C, Line 19</FormAndLineReferenceDesc>
        <ExplanationTxt>The ALPO Bylaws, Standing Rules for Staff Management, Staff Guidelines, and Board Guidelines will be available on the organization's website, later this year, as the website is undergoing reconstruction and updating to a new format. Our Form 990 statements submitted in the past to the State of California Attorney General's Registry of Charitable Trusts, are posted on the AG's website and interested parties are advised to go there to view those reports. We can also make all the above documents available in hard copy, if requested.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VIII, Line 2a - 2e</FormAndLineReferenceDesc>
        <ExplanationTxt>In reference to "extra publications and advertising", the ALPO gives no compensation to any officers, directors, or staff and is an all-volunteer organization.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part IX, Line 11g</FormAndLineReferenceDesc>
        <ExplanationTxt>The following is the listing of annual expenses for production of the Journal of the Association of Lunar and Planetary Observers: Printing $7,690, Postage $1,478, Surcharges $327, and Pre-production Support $9042. Total $18,537.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>