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 |
|---|---|---|---|---|---|
| 722 | Alert Notice 722: N Sgr 2020 No. 4 = PNV J17545999-2122401 [V6593 Sgr] | HQ, A. | 2020-10-02 (UTC) | Ongoing | Spectroscopy, Photometry |
| 742 | Alert Notice 742: V1405 Cas = N Cas 2021 brightening | HQ, A. | 2021-05-05 (UTC) | Ongoing | Spectroscopy, Photometry |
| 917 | Confirming Candidate C Stars (CCCStars) | Uttenthaler, S. | 2026-05-12 (UTC) | 2027-12-31 (UTC) | Spectroscopy |
| 631 | Coverage requested for current outburst of AG Dra | HQ, A. | 2018-04-24 (UTC) | Ongoing | Photometry |
| 880 | Flare Star Campaign: High-Cadence Photometric and Spectroscopic Observations | Hawkins, G. | 2025-01-13 (UTC) | 2026-12-31 (UTC) | Spectroscopy, Photometry |
| 717 | Flaring of blazar S5 1803+78 continues | HQ, A. | 2020-08-17 (UTC) | Ongoing | Photometry |
| 881 | HM Sge monitoring needed for HST and SOFIA observations | Goldman, S. | 2025-01-28 (UTC) | 2027-02-15 (UTC) | Photometry |
| 864 | Monitoring and identification of the variable components of HD 83742 / HD 302301 | Otero, S. | 2025-04-25 (UTC) | 2026-09-30 (UTC) | Photometry |
| 926 | Monitoring Cataclysmic Variables: Hunting for Low States | Cúneo, V. | 2026-05-13 (UTC) | 2027-04-30 (UTC) | Photometry |
| 919 | Monitoring needed for PSN J12355230+2755559 (Com) in support of Chandra observations | Waagen, E. | 2026-03-13 (UTC) | 2026-05-30 (UTC) | Photometry |
| 462 | Monitoring of J1407 for next extrasolar ring system transit | HQ, A. | 2012-06-25 (UTC) | Ongoing | Photometry |
| 875 | Monitoring T CrB | Waagen, E. | 2024-10-18 (UTC) | 2026-10-31 (UTC) | Spectroscopy, Photometry |
| 899 | Multicolor Photometry as a Tool for Stellar Characterization | Waalkes, W. | 2026-03-23 (UTC) | 2027-06-29 (UTC) | Photometry, Spectroscopy |
| 634 | Nightly monitoring requested for V1280 Sco = N Sco 2007 | HQ, A. | 2018-05-11 (UTC) | Ongoing | Photometry |
| 735 | Nova in Cassiopeia: N Cas 2021 | HQ, A. | 2021-03-19 (UTC) | Ongoing | Spectroscopy, Photometry |
| 906 | Nova in Cen: V1935 Cen (N Cen 2025 = PNV J14372177-5847400) | Waagen, E. | 2025-09-24 (UTC) | 2027-09-30 (UTC) | Photometry, Spectroscopy |
| 896 | Nova in Lup: V462 Lup (N Lup 2025 = ASASSN-25cm = AT 2025nlr) | Waagen, E. | 2025-06-16 (UTC) | 2027-06-16 (UTC) | Spectroscopy, Photometry |
| 905 | Nova in Oph: V4371 Oph (N Oph 2025 = TCP J17301230-2753488 = AT 2025wyg) | Waagen, E. | 2025-09-09 (UTC) | 2027-10-09 (UTC) | Spectroscopy, Photometry |
| 739 | Nova in Sagittarius: N Sgr 2021 No. 2 | HQ, A. | 2021-04-04 (UTC) | Ongoing | Spectroscopy, Photometry |
| 813 | Nova in Sagittarius: N Sgr 2023 = TCP J17562787-1714548 | HQ, A. | 2023-02-20 (UTC) | 2026-10-13 (UTC) | Spectroscopy, 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 |
| 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 |
| 907 | Nova in Sgr: V7994 Sgr (N Sgr 2025 No. 4 = TCP J18035290-3127298 = TCP J18035278-3127240) | Waagen, E. | 2025-09-24 (UTC) | 2027-09-30 (UTC) | Photometry, Spectroscopy |
| 633 | Nova outburst of V392 Per = TCP J04432130+4721280 | HQ, A. | 2018-04-29 (UTC) | Ongoing | Spectroscopy, Photometry |
| 684 | Photometry requested for campaign on V1491 Cyg | HQ, A. | 2019-11-01 (UTC) | 2040-11-30 (UTC) | Photometry |