2021 Eclipsing Binary Ephemeris
The 2021 Eclipsing Binary Ephemeris is now available.
Thank you Gerry Samolyk for all the good work you put into this!
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Alert Notice 727: Chandra observations taking place for RW Aur
Please continue observing RW Aur until further notice. - Elizabeth O. Waagen, 28 October, 2021
December 6, 2020
AAVSO Forum threads (scroll to the bottom of a thread for latest posts):
- Campaigns & Observation Reports: https://www.aavso.org/rw-aur-monitoring
Alert Notice 726: Nova in Perseus: N Per 2020 = TCP J04291884+4354232 = TCP J04291888+4354233 [V1112 Per]
November 27, 2020
AAVSO Forum threads (scroll to the bottom of a thread for latest posts):
- Time Sensitive Alerts: https://www.aavso.org/possible-nova-mag-10-perseus-0
- Novae: https://www.aavso.org/possible-nova-mag-10-perseus
Alert Notice 725: Campaign on Northern T Tau Stars
Note: V510 Tau, one of the stars in this campaign, will be re-observed by HST on 2021 February 12-13 UT. Please continue your observations (highest priority are V and B, then Rc and U), obtaining a few observations each night from now through February 15. - Elizabeth O. Waagen, 1 February 2021
November 12, 2020
Alert Notice 724: VY Aqr observing campaign
Note: Please continue to observe VY Aqr until further notice. - Elizabeth O. Waagen, April 4, 2022
Please continue to observe VY Aqr until solar conjunction makes doing so impossible, and pick up again as soon after conjunction as possible. - Elizabeth O. Waagen, 1 February 2021
November 9, 2020
Alert Notice 723: Photometry and Spectroscopy requested for UXOR ASASSN-V J181654.06-202117.6
Note: The astronomers request continued observations to ascertain whether or not the eclipse is completely over. - Elizabeth O. Waagen, 6 April 2021
October 28, 2020
Alert Notice 722: N Sgr 2020 No. 4 = PNV J17545999-2122401 [V6593 Sgr]
The GCVS name V6593 Sgr has been assigned to this nova. Please use this name when submitting observations to the AAVSO International Database. - Elizabeth O. Waagen, 9 October 2020
October 5, 2020
Alert Notice 721: Anticipated secondary eclipse of b Persei centered on October 26 2020 UT
October 1, 2020
AAVSO Forum threads (scroll to the bottom of a thread for latest posts):
- Campaigns and Observation Reports: https://www.aavso.org/b-per-oct-2020-campaign
Please subscribe to this thread if you are participating in the campaign so you can be updated by the astronomers and by HQ. Join in the discussion or ask questions there!
Alert Notice 720: Photometry requested for SS Cyg
September 13, 2020
AAVSO Forum threads (scroll to the bottom of a thread for latest posts):
- Campaigns and Observation Reports: https://www.aavso.org/ss-cyg-campaign
- Cataclysmic Variables: https://www.aavso.org/ss-cyg-campaign-01
LPV of the month - September 2020 - CH Cyg
CH Cygni
By Rich Roberts