2025-08-12T12:43:01-05:00 2024-09-30 994260840 DOEREN MAYHEW 305 WEST BIG BEAVER ROAD TROY MI 48084 990 2023-10-01 042164402 AMERICAN ASSOCIATION OF VARIABLE STAR OB AMER 6173540484 185 ALEWIFE BROOK PARKWAY 410 CAMBRIDGE MA 02138 BRIAN KLOPPENBORG EXECUTIVE DIRECTOR 6173540484 2025-08-12 1 1 MEGAN MCCANDLISH CPA P02452420 2482443000 2025-08-11 2023 2025-03-06 01:10:19Z BRIAN KLOPPENBORG 185 ALEWIFE BROOK PARKWAY CAMBRIDGE MA 02138 7181278 0 X WWW.AAVSO.ORG X 1911 MA TO ENABLE ANYONE, ANYWHERE, TO PARTICIPATE IN SCIENTIFIC DISCOVERY THROUGH VARIABLE STAR ASTRONOMY. 15 14 7 800 0 0 185936 188109 115288 156029 390470 730591 0 0 691694 1074729 0 0 0 0 694101 754418 0 0 64566 500882 461808 1194983 1216226 -503289 -141497 16088028 19079368 420023 385998 15668005 18693370 X THE AAVSO PROVIDES AMATEUR ASTRONOMERS AND STUDENTS THE OPPORTUNITY TO MAKE REAL AND DIRECT CONTRIBUTIONS TO ASTRONOMY. IN PROGRAMS THEY COMPLETE AT THEIR OWN PACE, WE TEACH THEM HOW TO MAKE OBSERVATIONS AND HOW TO ANALYZE ASTRONOMICAL DATA, AND WE OFFER THEM THE OPPORTUNITY TO PARTICIPATE IN OBSERVING CAMPAIGNS DESIGNED TO PRODUCE PEER-REVIEWED PUBLISHED PAPERS. 0 0 552477 102472 THE AAVSO, THROUGH ITS MEMBERS AND THE BROADER ASTRONOMICAL COMMUNITY, CONDUCTS ASTRONOMICAL RESEARCH, DOES DATA COLLECTION, MAINTAINS A DATABASE OF KNOWN VARIABLE STARS, A DATABASE OF INDIVIDUAL OBSERVATIONS MEASURING BRIGHT OF STARS IN VARIOUS COLORS, A DATABASE OF EXOPLANET OBSERVATIONS, A DATABASE OF SUNSPOT COUNTS, AND A DATABASE OF SPECTROGRAPHS. THE AAVSO HAS ABOUT 1,400 MEMBERS, THE MAJORITY OF WHICH CONTRIBUTE ASTRONOMICAL OBSERVATIONS. THE VARIABLE STAR DATABASE HAS 2 MILLION KNOWN VARIABLE STARS. THERE ARE ABOUT 65 MILLION BRIGHTNESS OBSERVATIONS, 8 THOUSAND EXO-PLANET TRANSITS, 15 THOUSAND SPECTRA, AND 181 THOUSAND SOLAR OBSERVATIONS. THE AAVSO ORGANIZES OBSERVING CAMPAIGNS OR PROVIDES A PLATFORM FOR PROFESSIONAL ASTRONOMERS TO REQUEST MONITORING OF STARS FOR SPACECRAFT MISSIONS. 119800 40111 THE AAVSO HOLDS AN ANNUAL SCIENCE AND MEMBERSHIP MEETING EACH FALL. THE MEETING ROTATES THROUGHOUT THE COUNTRY TO GIVE MEMBERS A BETTER CHANCE TO PARTICIPATE. EACH MEETING HAS ABOUT 75 IN-PERSON PARTICIPANTS AND AN ADDITIONAL 25-50 ONLINE MEMBERS. THE MEETINGS ARE OFTEN HELD IN CONJUNCTION WITH A SPECIAL INTEREST WORKSHOP BEFORE OR AFTER THE MEETING. THE MEETING WILL HAVE 1-1/2 DAYS OF SCIENCE TALKS, INCLUDING RESEARCH PRESENTATION BY MEMBERS. THERE IS ALSO A RECEPTION, FINAL DINNER, AND A HALF DAY MEMBERSHIP MEETING WHERE FINANCIAL AND OPERATIONAL RESULTS ARE PRESENTED, AWARDS PRESENTED. AND THE INCOMING BOARD OF DIRECTORS IS VOTED UPON. 71223 13446 THE AAVSO PROVIDES A NUMBER OF EDUCATIONAL COURSES, WEBINARS, MENTORING, ARTICLES, BLOG POSTS, AND OTHER COMMUNICATIONS. WE OPERATE AN ONLINE FORUM ON A NUMBER OF OBSERVING AND EQUIPMENT TOPICS. WE OPERATE A MENTORING PROGRAM FOR NEW OBSERVERS WHERE AN EXPERIENCED OBSERVER COACHES THEM. WE RECEIVE ABOUT 30 MENTORING REQUESTS PER YEAR. WE ALSO PROVIDE CHOICE COURSES, A MULTI-DAY EDUCATIONAL COURSE WHICH HAS ABOUT 100 PARTICIPANTS PER YEAR. EACH MONTH WE PROVIDE ZOOM WEBINARS ON VARIOUS SUBJECTS WHICH HAS ABOUT 2,000 PARTICIPANTS EACH YEAR. WE ALSO POST WEBINARS TO OUR YOUTUBE CHANNEL GETTING OVER 8,000 VIEWS. WE ALSO POST ARTICLES TO VARIOUS SOCIAL MEDIA SITES AND ARE A RESOURCE FOR THE NEWS MEDIA CONCERNING STAR RESEARCH. 743500 1 1 0 0 0 0 0 0 0 1 1 0 0 0 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 6 0 1 7 1 0 0 0 0 0 0 0 0 0 0 X 15 14 0 0 0 0 1 1 1 1 1 0 0 1 1 1 1 1 1 1 0 0 MA CO PA X X BRIAN KLOPPENBORG 6173540484 185 ALEWIFE BROOK PARKWAY CAMBRIDGE MA 02138 DR BRIAN KLOPPENBORG EXECUTIVE DIRECTOR 35.00 X X 182132 0 19663 RICHARD BERRY PRESIDENT 6.00 X X 0 0 0 SARAH AUSTRIN WILLIS VICE PRESIDENT 2.00 X X 0 0 0 DENNIS CONTI 2ND VICE PRESIDENT 1.00 X X 0 0 0 ROBERT STEPHENS TREASURER 3.00 X X 0 0 0 KRIS LARSEN SECRETARY 1.00 X X 0 0 0 DAVID COWALL PAST PRESIDENT 1.00 X 0 0 0 DIOGO TEIXEIRA DIRECTOR 1.00 X 0 0 0 ERIC HINTZ DIRECTOR 1.00 X 0 0 0 THOMAS MACCARONE DIRECTOR 1.00 X 0 0 0 PETER BEALO DIRECTOR 3.00 X 0 0 0 PAT BOYCE DIRECTOR 1.00 X 0 0 0 ARNE HENDON DIRECTOR 1.00 X 0 0 0 WALT COONEY DIRECTOR 3.00 X 0 0 0 MARK MUNKACSY DIRECTOR 1.00 X 0 0 0 MATT CRAIG DIRECTOR 1.00 X 0 0 0 182132 0 19663 1 0 1 0 0 188109 188109 MEMBERSHIP DUES 900099 102472 102472 MEETINGS AND SYMPOSIUM 541700 53557 53557 156029 420057 420057 6417083 6106549 310534 310534 310534 1074729 156029 0 730591 219872 135717 71425 12730 412282 261212 126627 24443 23827 16199 6115 1513 50758 18029 30932 1797 47679 30208 14644 2827 3720 2025 1464 231 28931 15747 11386 1798 55681 55681 53721 46122 7415 184 7462 7742 -614 334 15079 8875 5385 819 49870 20872 26705 2293 90696 56513 28857 5326 13238 11482 631 1125 88714 76942 4230 7542 9514 3129 6127 258 10866 5191 5160 515 TELESCOPE SUPPLIES 18502 18502 DUES & SUBSCRIPTIONS 12114 6674 4828 612 REPAIRS AND MAINTENANCE 3700 2319 1162 219 1216226 743500 408160 64566 120708 109962 932379 810395 14064 22234 148034 126349 27590 21685 14704292 17896382 288995 218710 16088028 19079368 58052 91422 80326 81537 281645 213039 420023 385998 X 12085730 15038831 3582275 3654539 15668005 18693370 16088028 19079368 -141497 3166862 0 X 0 1 X 1 0 X 194848 563165 329791 185936 188109 1461849 194848 563165 329791 185936 188109 1461849 1461849 413652 298461 151049 403668 420057 1686887 3148736 311776 0.46430 0.43340 X RESTRICTED RESTRICTED RESTRICTED RESTRICTED RESTRICTED RESTRICTED RESTRICTED RESTRICTED 15282474 14300 3841741 732566 18405949 14226892 1746958 691376 15282474 14368646 3082306 -2574619 649441 14226892 12248049 12540 2744637 636580 14368646 13199403 24023 -231328 744049 12248049 0.80145 0.17989 0.01867 0 0 130700 117672 13028 17334 8677 8657 21685 OPERATING LEASE LIABILITIES 213039 213039 X 4198854 3166862 12944 3179806 1019048 55681 55681 1074729 1173489 12944 12944 1160545 55681 55681 1216226 PART X, LINE 2: THE ASSOCIATION IS EXEMPT FROM FEDERAL INCOME TAXES AS AN ORGANIZATION FORMED FOR CHARITABLE PURPOSES UNDER SECTION 501(C)(3) OF THE INTERNAL REVENUE CODE ("IRC"). THE ASSOCIATION IS ALSO EXEMPT FROM STATE INCOME TAXES. DONORS MAY DEDUCT CONTRIBUTIONS MADE TO THE ASSOCIATION WITHIN THE IRS REQUIREMENTS. THE ASSOCIATION'S INCOME TAX FILINGS ARE SUBJECT TO AUDIT BY VARIOUS TAXING AUTHORITIES. THE ASSOCIATION'S OPEN AUDIT PERIODS ARE 2021 - 2024. 1 X X X X 0 0 0 0 0 0 0 0 0 DR BRIAN KLOPPENBORG EXECUTIVE DIRECTOR 172132 0 10000 0 0 0 8280 0 11383 0 201795 0 0 0 PART I, LINE 3 AN EVALUATION COMMITTEE IS APPOINTED ANNUALLY BY THE PRESIDENT. THEIR REPORT IS GIVEN TO THE BOARD OF DIRECTORS WHO THEN DETERMINES COMPENSATION. FORM 990, PART VI, SECTION A, LINE 6 THERE SHALL BE THREE CLASSES OF MEMBERSHIP IN THE ASSOCIATION: MEMBERS, HONORARY MEMBERS AND ORGANIZATIONAL MEMBERS. THE ELIGIBILITY REQUIREMENTS AND RIGHTS OF EACH CLASS OF MEMBERS SHALL BE AS FOLLOWS: MEMBERS: ANY INDIVIDUAL WHO IS INTERESTED IN THE ADVANCEMENT OF VARIABLE STAR WORK AND KINDRED SUBJECTS SHALL BE ELIGIBLE TO BECOME A MEMBER. UPON APPLICATION AND PAYMENT OF DUES, IN SUCH AMOUNTS AS SHALL BE DETERMINED BY THE BOARD OF DIRECTORS FROM TIME TO TIME, SUCH PERSONS SHALL BECOME MEMBERS. MEMBERS SHALL PAY ANNUAL DUES, MAY SERVE AS OFFICERS OR DIRECTORS OF THE ASSOCIATION, AND ARE ENTITLED TO VOTE ON ASSOCIATION AFFAIRS. HONORARY MEMBERS: THE BOARD OF DIRECTORS MAY ELECT ANY INDIVIDUAL AS AN HONORARY MEMBER IN RECOGNITION OF SUCH INDIVIDUAL'S DISTINGUISHED CONTRIBUTION TO ASTRONOMY. THE SECRETARY SHALL NOTIFY SUCH INDIVIDUAL OF HIS/HER ELIGIBILITY TO BECOME AN HONORARY MEMBER AND HE/SHE SHALL BECOME SO UPON NOTIFYING THE SECRETARY OF ACCEPTANCE. HONORARY MEMBERS SHALL NOT BE LIABLE FOR THE PAYMENT OF DUES AND SHALL NOT BE ELIGIBLE TO SERVE AS AN OFFICER OF THE ASSOCIATION, BUT MAY SERVE ON THE BOARD OF DIRECTORS AND MAY VOTE ON ASSOCIATION AFFAIRS. ORGANIZATIONAL MEMBERS: CORPORATIONS AND OTHER ENTITIES DESIROUS OF ENCOURAGING THE WORK OF THE ASSOCIATION MAY BECOME ORGANIZATIONAL MEMBERS. ORGANIZATIONAL MEMBERS DO NOT PAY DUES, MAY NOT HOLD OFFICE OR SERVE ON THE BOARD OF DIRECTORS, AND ARE NOT ENTITLED TO VOTE ON ASSOCIATION AFFAIRS. FORM 990, PART VI, SECTION A, LINE 7A MEMBERS ELECT ANNUALLY THREE BOARD MEMBERS, WHO HAVE THREE YEAR TERMS. FORM 990, PART VI, SECTION A, LINE 7B AMENDMENTS TO THE BYLAWS, DISSOLUTION OF THE ORGANIZATION FORM 990, PART VI, SECTION B, LINE 11B THE FINANCIAL STATEMENTS AND TAX RETURNS WILL BE REVIEWED BY THE EXECUTIVE COMMITTE PRIOR TO APPROVAL. IN THE PAST THE PRACTICE HAS BEEN TO GO THROUGH IT LINE-BY-LINE. FORM 990, PART VI, SECTION B, LINE 12C CIRCUMSTANCES HAVE BEEN RARE WHERE POTENTIAL CONFLICTS COULD ARISE BECAUSE THE COMMERCIAL ENGAGEMENT POLICY IS VERY RESTRICTIVE ON HOW WE CAN INTERACT WITH EQUIPMENT VENDORS. THOSE RESTRICTIONS WERE SLIGHTLY LOOSENED WITH AN UPDATE TO THE POLICY IN MAY 2025. BOARD MEMBERS REQUIRED TO SIGN CONFLICT OF INTEREST POLICY ANNUALLY. FORM 990, PART VI, SECTION B, LINE 15A OTHER OFFICERS NOT COMPENSATED. KEY EMPLOYEES OTHER THAN EXECUTIVE DIRECTOR HAVE COMPENSATION DETERMINED BY THE EXECUTIVE DIRECTOR AFTER THE OVERALL BUDGET FOR COMPENSATION HAS BEEN APPROVED BY THE BOARD. FORM 990, PART VI, SECTION C, LINE 19 THE BYLAWS ARE AVAILABLE ON THE WEBSITE. OTHER DOCUMENTS SUCH AS THE CONFLICT OF INTEREST POLICY ARE STORED ON GOOGLE DRIVE AND MADE AVAILABLE TO BOARD MEMBERS AND OFFICERS.