AAVSO Alert Notice

Alert Notice 755: Exoplanet transit observation requested for HD 80606

September 22, 2021

AAVSO Forum threads (scroll to the bottom of a thread for latest posts):
- Exoplanets: https://www.aavso.org/hd-80606-transit-observation

Please subscribe to this thread if you are observing this target so you can be updated by the astronomers and by HQ. Join in the discussion or ask questions there!

Alert Notice 752: Rare Outburst of Recurrent Nova RS Ophiuchi

Note: Please continue to observe RS Oph, although the 2021 outburst is over. It returned to a fainter magnitude than before the outburst, so ongoing follow-up observations will be very valuable.  -  Elizabeth O. Waagen, April 4, 2022

August 9, 2021

Alert Notice 750: T CrB photometry and spectroscopy requested for HST and XMM-Newton observations

Note: Ongoing observations of T CrB are extremely important as the eruption predicted for 2024 draws closer. See here for more information.  -  Elizabeth O. Waagen, July 5, 2023

Please continue to monitor T CrB until further notice.  -  Elizabeth O Waagen, February 9, 2023