Overview
The American Association of Variable Star Observers (AAVSO) observing campaigns are coordinated observational efforts focused on specific astronomical objects, particularly variable stars. These campaigns invite amateur and professional astronomers worldwide to contribute observations, leading to a comprehensive dataset that can yield substantial scientific results.
Active Campaigns
| # | Title | Principal Investigator | Start date | End date | Requested data types |
|---|---|---|---|---|---|
| 873 | Spectroscopy requested for VV Cephei - Periodic precession of B star's rotational axis after periastron 2025 | Schwarz, M. | 2025-04-11 (UTC) | 2025-12-31 (UTC) | Spectroscopy |
| 889 | Photometry in support of TESS and Swift Observations of common-envelope post-novae | Walter, F. | 2025-04-01 (UTC) | 2025-06-29 (UTC) | Photometry |
| 891 | V1159 Ori coverage needed to monitor for outburst to trigger radio observation | Waagen, E. | 2025-04-01 (UTC) | 2025-04-15 (UTC) | Photometry |
| 890 | Nova in Sgr: V7993 Sgr = N Sgr 2025 No. 3 = TCP J18022164-3310319 | Waagen, E. | 2025-03-26 (UTC) | 2027-12-31 (UTC) | Spectroscopy, Photometry |
| 884 | RW Aur fading episode - monitoring requested | Waagen, E. | 2025-02-04 (UTC) | 2027-12-31 (UTC) | Photometry |
| 881 | HM Sge monitoring needed for HST and SOFIA observations | Goldman, S. | 2025-01-28 (UTC) | 2027-02-15 (UTC) | Photometry |
| 882 | Continued monitoring requested for PSN J12355230+2755559 (Com) | Waagen, E. | 2025-01-20 (UTC) | 2026-01-31 (UTC) | Photometry |
| 880 | Flare Star Campaign: High-Cadence Photometric and Spectroscopic Observations | Hawkins, G. | 2025-01-13 (UTC) | 2026-12-31 (UTC) | Spectroscopy, Photometry |
| 874 | ASASSN-V J022007.17+610705.5 photometry requested in support of spectroscopy observations | Marshall, B. | 2024-11-05 (UTC) | 2025-12-31 (UTC) | Photometry |
| 877 | Photometry of GOTO065054.49+593624.51 requested | Waagen, E. | 2024-11-05 (UTC) | 2025-04-15 (UTC) | Photometry |
| 875 | Monitoring T CrB | Waagen, E. | 2024-10-18 (UTC) | 2026-10-31 (UTC) | Spectroscopy, Photometry |
| 871 | AM Her monitoring requested | Terada, Y. | 2024-10-08 (UTC) | 2025-08-31 (UTC) | Photometry |
| 865 | Photometry and Spectroscopy of WR 140 (V1687 Cyg) through its upcoming periastron | Richardson, N. | 2024-09-10 (UTC) | 2025-06-30 (UTC) | Spectroscopy, Photometry |
| 870 | Unveiling CI Hyi as a symbiotic system | Toalá, J. | 2024-09-10 (UTC) | 2025-09-10 (UTC) | Photometry |
| 872 | Nova in Scorpius: N Sco 2024 No. 3 = V1725 Sco (TCP J17064645-3528079) | Waagen, E. | 2024-09-10 (UTC) | 2026-09-11 (UTC) | Spectroscopy, Photometry |
| 867 | Nova in Vulpecula: V615 Vul ( = N Vul 2024 = PNV J19430751+2100204) | Waagen, E. | 2024-08-02 (UTC) | 2025-08-31 (UTC) | Spectroscopy, Photometry |
| 856 | Nova in Ophiuchus: N Oph 2024 = V4370 Oph = TCP J17395720-2627410 | HQ, A. | 2024-03-10 (UTC) | 2026-03-13 (UTC) | Spectroscopy, Photometry |
| 849 | Bright nova in Sco: V1723 Sco (= N Sco 2024 = PNV J17261813-3809354) | HQ, A. | 2024-02-10 (UTC) | 2026-02-13 (UTC) | Photometry |
| 836 | AAVSO and SNEWS partner in campaign to monitor bright supernova progenitors | HQ, A. | 2023-10-13 (UTC) | 2025-08-31 (UTC) | Photometry |
| 826 | Supernova in M101 - SN 2023ixf in NGC 5457 | HQ, A. | 2023-05-19 (UTC) | Ongoing | — |
| 859 | Photometry and spectroscopy requested for bright binaries being observed with CHARA - Revised | HQ, A. | 2023-04-18 (UTC) | 2025-08-28 (UTC) | Spectroscopy, Photometry |
| 813 | Nova in Sagittarius: N Sgr 2023 = TCP J17562787-1714548 | HQ, A. | 2023-02-20 (UTC) | 2026-10-13 (UTC) | Spectroscopy, Photometry |
| 804 | Alert Notice 804: RW Cep dimming underway - observations requested | HQ, A. | 2022-12-16 (UTC) | 2025-06-30 (UTC) | Photometry, Spectroscopy |
| 797 | Monitoring requested for V730 Cep | HQ, A. | 2022-10-28 (UTC) | 2025-08-31 (UTC) | Photometry |
| 773 | EX Lup outburst coverage requested | HQ, A. | 2022-03-19 (UTC) | 2025-10-31 (UTC) | Spectroscopy, Photometry |