Overview
The American Association of Variable Star Observers (AAVSO) observing campaigns are coordinated observational efforts focused on specific astronomical objects, particularly variable stars, which are stars that change in brightness over time. These campaigns invite amateur and professional astronomers worldwide to contribute observations, leading to a diverse and comprehensive dataset that can yield substantial scientific results.
Active Campaigns
| # | Title | Researcher | Start date | End date | Requested data types |
|---|---|---|---|---|---|
| 875 | Monitoring T CrB | weo | 2024-10-18 (UTC) | 2026-10-31 (UTC) | Spectroscopy, Photometry |
| 871 | AM Her monitoring requested | terada | 2024-10-08 (UTC) | 2025-08-31 (UTC) | Photometry |
| 865 | Photometry and Spectroscopy of WR 140 (V1687 Cyg) through its upcoming periastron | astronoel | 2024-09-10 (UTC) | 2025-06-30 (UTC) | Spectroscopy, Photometry |
| 870 | Unveiling CI Hyi as a symbiotic system | jtoala | 2024-09-10 (UTC) | 2025-09-10 (UTC) | Photometry |
| 872 | Nova in Scorpius: N Sco 2024 No. 3 = V1725 Sco (TCP J17064645-3528079) | weo | 2024-09-10 (UTC) | 2026-09-11 (UTC) | Spectroscopy, Photometry |
| 867 | Nova in Vulpecula: V615 Vul ( = N Vul 2024 = PNV J19430751+2100204) | weo | 2024-08-02 (UTC) | 2025-08-31 (UTC) | Spectroscopy, Photometry |
| 856 | Nova in Ophiuchus: N Oph 2024 = V4370 Oph = TCP J17395720-2627410 | VPhot Admin | 2024-03-10 (UTC) | 2026-03-13 (UTC) | Spectroscopy, Photometry |
| 851 | Multiwavelength coverage requested for V695 Cyg study with HST | VPhot Admin | 2024-02-14 (UTC) | 2024-12-31 (UTC) | Spectroscopy, Photometry |
| 849 | Bright nova in Sco: V1723 Sco (= N Sco 2024 = PNV J17261813-3809354) | VPhot Admin | 2024-02-10 (UTC) | 2026-02-13 (UTC) | Photometry |
| 838 | Monitoring requested for 11 dwarf novae in support of HST observations in 2023-2024 | VPhot Admin | 2023-11-01 (UTC) | 2024-12-31 (UTC) | Photometry |
| 836 | AAVSO and SNEWS partner in campaign to monitor bright supernova progenitors | VPhot Admin | 2023-10-13 (UTC) | 2025-08-31 (UTC) | Photometry |
| 826 | Supernova in M101 - SN 2023ixf in NGC 5457 | VPhot Admin | 2023-05-19 (UTC) | Ongoing | — |
| 859 | Photometry and spectroscopy requested for bright binaries being observed with CHARA - Revised | VPhot Admin | 2023-04-18 (UTC) | 2025-08-28 (UTC) | Spectroscopy, Photometry |
| 813 | Nova in Sagittarius: N Sgr 2023 = TCP J17562787-1714548 | VPhot Admin | 2023-02-20 (UTC) | 2026-10-13 (UTC) | Spectroscopy, Photometry |
| 804 | Alert Notice 804: RW Cep dimming underway - observations requested | VPhot Admin | 2022-12-16 (UTC) | 2024-12-31 (UTC) | Spectroscopy, Photometry |
| 797 | Monitoring requested for V730 Cep | VPhot Admin | 2022-10-28 (UTC) | 2025-08-31 (UTC) | Photometry |
| 773 | EX Lup outburst coverage requested | VPhot Admin | 2022-03-19 (UTC) | 2025-10-31 (UTC) | Spectroscopy, Photometry |
| 771 | Alert Notice 771: V1117 Her in deep fade again | VPhot Admin | 2022-03-09 (UTC) | 2025-10-31 (UTC) | Photometry |
| 754 | Alert Notice 754: Monitoring requested for 15 VY Scl cataclysmic variables in support of HST observations | VPhot Admin | 2021-09-14 (UTC) | 2024-12-31 (UTC) | Spectroscopy, Photometry |
| 747 | V627 Peg photometry and spectroscopy requested | VPhot Admin | 2021-07-20 (UTC) | Ongoing | Spectroscopy, Photometry |
| 749 | Nova in Vulpecula: N Vul 2021 = TCP J20210770+2914093 | VPhot Admin | 2021-07-16 (UTC) | Ongoing | Spectroscopy, Photometry |
| 746 | High-resolution spectroscopy and photometry requested for rho Cas study | VPhot Admin | 2021-06-18 (UTC) | 2024-12-31 (UTC) | Spectroscopy, Photometry |
| 744 | V1117 Her observations requested | VPhot Admin | 2021-06-08 (UTC) | Ongoing | Photometry |
| 742 | Alert Notice 742: V1405 Cas = N Cas 2021 brightening | VPhot Admin | 2021-05-05 (UTC) | Ongoing | Spectroscopy, Photometry |
| 738 | R Aqr monitoring needed in support of Chandra and HST observations | VPhot Admin | 2021-04-05 (UTC) | Ongoing | Spectroscopy, Photometry |