Allen but one of the good onesJun 23, 2025

Bah. Tried, and failed, to see the Nova in Lupus this evening. Skies were reasonably clear, but just a bit too bright. I was barely seeing past mag 7.5, with the 10x50 binoculars.

Ah well, maybe somebody else will spot it?

https://skyandtelescope.org/astronomy-news/bright-nova-lights-up-lupus/

#Astronomy #Nova #Aavso

LYC-60 (SWL)Oct 2, 2024
Commemorative plaque of the Prussian #astronomer F. W. Argelander in #Klaipeda, #Lithuania. Argelander was the first astronomer to begin a careful study of variable stars. #AAVSO #AstroBav #astronomy
Jorma RyskeJul 29, 2024
@cosmos4u
I have observed #TCrB around 30 nights during June&July each about 4 hours period with 22 second resolution. However, although there has been some possible findings of trends in my observations I have not actually analyzed those.
There are many research papers of these Cataclysmic Variables (CVs) published, and seems that in #TCrB there are brightness flickering even inside 1 minute. I have reported my observations to #AAVSO database, which researchers are using actively.
Heinz-Bernd EggensteinApr 12, 2024
Doing useful science with the ZWO #Seestar S50 is easy. Currently at ~ 10mag (V), the recurring #nova #T_CrB is a good target for doing #photometry with small aperture instruments like the S50. Highlighted below is a dataset I did from this week: each data point is the average of measurements for 10 x 10sec exposures, green channel only, == > 0.01 mag standard deviation ( shown in #AAVSO Light Curve Generator ) Be the first to see T CrB go nova for the first time in almost 80 years!
Enrique Boeneker has movedOct 29, 2023

P Cygni spectra comparison. Three moments of a very bright blue star surrounded by a high speed, expanding envelope.

Spectra produced with own data at the #AAVSO.

#Astrodon #astronomy #astrophysics

Show threadRichard HendricksOct 6, 2023
@thomasconnor Does that star have a name? Can it be seen with midrange amateur equipment, like 5-8" telescopes? What is its period? Might make for a fun #AmateurAstronomy project. #AAVSO
Susan DelaneyNov 7, 2022
Excellent solar observing conditions today!
#Nature #Astronomy #Sunspots #AAVSO #WestportAstroSociety #observation
Ansgar Schmidt Nov 6, 2022
Just did my first #photometric #variablestar #observation #report to #AAVSO. A new chapter in my #citizenScience endeavour.
AAVSOJul 25, 2019
Alert Notice 674: UU Aqr being observed with Chandra #aavso #science #news https://www.aavso.org/aavso-alert-notice-674
Alert Notice 674: UU Aqr being observed with Chandra | aavso.org

AAVSOJul 25, 2019
Alert Notice 673: SS Cyg photometry and spectroscopy requested to complement TESS monitoring #aavso #science #news https://www.aavso.org/aavso-alert-notice-673
Alert Notice 673: SS Cyg photometry and spectroscopy requested to complement TESS monitoring | aavso.org