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News and Announcements

15 December Request Comparison Stars for Variable Star Charts

[Note: If your variable star has an existing sequence, even if it is only one comparison star, please request assistance via CHET. This page is only for variables that have NO comparison stars. Thank you.]

13 December ejaavso preprint "The First Historical Standstall of WW Ceti" by M. Simonsen and R. Stubbings

07 December Charts and Sequences Update December 2010


07 December AAVSO Centennial Calendar for 2011

A Century of Variable Star Observing: 1911-2010 

Order today!


AAVSO Centennial Calendar fpr 2011

07 December ejaavso preprint "Recent minima of 144 EB stars" by G. Samolyk

07 December Help us test the New Chat Room

We would like to do one more test of the new AAVSO chat software before we officially go live with it and we need your help!! 

We'd like to get a chat going with a large group of people so if you are free today at 5:30 pm Eastern, please take a few minutes to visit: 

Be sure to let us know of any issues you have - either via the chat, by email, or using the "contact us" form on the AAVSO web page.

06 December 30 Min Downtime at 1700UTC 6 Dec

The AAVSO network, including the website, will be unavailable for about 30 minutes at 1700UTC (1200EST) on 6 December for the installation of a new network card in the firewall.

Doc Kinne

04 December AAVSO Special Notice #226

Request for observations of FS Aurigae

02 December AAVSOnet Online Discussion Forum

We have created an online forum for discussion of AAVSOnet topics. Arne will moderate the forums, post announcements regarding AAVSOnet systems and answer any questions you have. If you have any interest or questions about AAVSOnet, please stop by. No question is too silly.

01 December AAVSO Special Notice #225

A new UGWZ candidate in Pisces


01 December 100 Years of Citizen Science


30 November Alert Notice 428: Monitoring requested of the peculiar cataclysmic variable FS Aurigae

November 30, 2010: Dr. Vitaly Neustroev (U.

26 November Symbiotic Variable Star On the Verge of an Eruption?

23 November Alert Notice 427: Observing campaign on BM Ori and the Trapezium region

November 23, 2010: The AAVSO requests ground-based observations of the Trapezium region of the Orion Nebula (M42), along with surrounding regions in Orion, in conjunction with upcoming observations with the MOST Satellite.  All AAVSO observers are encouraged to participate in this project, and we are requesting observations for a number of different targets from both instrumental and visual observers.

23 November AAVSO Special Notice #224

Possible outburst of SDSS_J160501.35+203056.9

18 November AAVSO Special Notice #223

BL Lac object 3C 454.3 undergoing bright flare

16 November Web Chat with our New Web Developer

Join us in the AAVSO Chat Room on Wednesday, November 17 from 2-3pm eastern (7-8pm UT) for a special chat with Will McMain, the newest AAVSO staff member. Will was hired in September as our new Web Developer and has been busy updating and adding items to the new web site. Many of you met him at the fall meeting where he ran the AV for the Saturday session and also hung out with us in the evenings. A staff bio is here:

11 November Fall Meeting: Presentation Files

Below are presentation files that are available for download (as ppt or pdf files) from the 99th Annual Meeting of the AAVSO.  Click on the title to view or download the presentation file.

06 November Meetings Survey

Rebecca and I have put together a 8-item survey about AAVSO meetings. The goal of this survey is to give us information about what is important to you when you make decisions about meeting attendance. It includes questions about preferred locations, meeting structure, content of talks, etc. If you have a moment, please give us 5-10 minutes to take the survey. We would like everyone interested to take the survey, whether you have attended a prior meeting or not.

05 November AAVSO Special Notice #222

Bright Supernova in UGC 5189A: SN 2010jl

November 5, 2010: We have been informed by Tim Puckett and by the Central Bureau for Astronomical Telegrams (CBET 2532, Daniel W. E. Green, Ed.) of the discovery of a bright possible supernova in UGC 5189A by J. Newton and Puckett, Portal, AZ, on November 3.52 UT at unfiltered magnitude 13.5. Confirming images (limiting magnitude 19.1) by Puckett on Nov. 4.50 UT showed the object at magnitude 12.9./p>

02 November AAVSO Special Notice 221

Infrequent Outburst of the SU UMa Variable HT Cas

20 October AAVSO Special Notice #220

Request for observations of high-mass X-ray binaries (HMXBs) in support of radial velocity observations

15 October AAVSO Newsletter 46

The October 2010 issue of the AAVSO Newsletter is now available

15 October Three recent JAAVSO preprints

"Absolute Magnitudes and Distances of Recent Novae" by Yitping Kok

"Ross 4—A Possible Recurrent Nova?" by Samantha J. Brown, O. F. Mills, Wayne Osborn, and Vivian Hoette

"A Simple, Portable Apparatus to Measure Night Sky Brightness at Various Zenith Angles" by Jennifer Birriel and James Kevin Adkins

12 October AAVSO Special Notice #219

Eclipse of the symbiotic star CI Cygni

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