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News and Announcements

07 January Alert Notice 429: Photometry requested for three "Vestoid" Near-Earth Objects
January 8, 2011: Dr. Michael David Hicks (Jet Propulsion Laboratory) contacted the AAVSO requesting precision 
photometry of three solar system objects in support of NASA's DAWN mission to Vesta.  These objects, called 
"Vestoids", are near-Earth objects with similar reflectance spectra to Vesta itself, suggesting they may be fragments 
of that larger body.          
07 January AAVSO Newsletter 47 now online

AAVSO Newsletter for January 2011

05 January ejaavso preprint "Studies of "Irregularity" in Pulsating Red Giants. III. by J. R. Percy, E. Terziev

04 January Online Chat: Jan. 4 at 4pm

We will be hosting a Citizen Sky online chat this Tuesday at 4pm eastern (-5UT). Dr. Bob, Brian Kloppenborg, Rebecca, Aaron and other Citizen Sky and AAVSO staff will be on hand. Topics will include updates on epsilon Aurigae, the upcoming AAS meeting, and ideas for research teams. However, it will be a free chat so any AAVSO/Citizen Sky/VSO topic is welcomed.

Click here to login via a web browser.

03 January AAVSO Special Notice #227

Unusual Behavior of FS Aur - Outburst Imminent?

January 3, 2011: The campaign to monitor activity of the peculiar cataclysmic variable FS Aurigae, as announced in AAVSO Alert Notice 428 (see also AAVSO Special Notice #226), continues. Principal Investigator Dr. Vitaly Neustroev reports that the campaign is going well, and that he is very appreciative of your observing efforts and contributions.

29 December Southern 10-Star Tutorial

Over at Citizen Sky we just published a Southern Hemisphere version of our 10-Star Training Tutorial. It is similar to the original tutorial except that it includes stars and charts for the Southern Hemisphere and is not focused on epsilon Aurigae.

20 December ejaavso preprint "Anchoring the Universal Distance Scale Via a Wesenheit Template" by Daniel J. Majaess et al.

20 December ejaavso preprint "VX Hydrae: Observation of a Sudden Change in a Pulsating Star" by M. Bonnardeau, S. Dvorak, R. Poklar, G. Samolyk

17 December ejaavso preprint "The Variable Star HD 173637" by A. U. Landolt

16 December 2011 JD Calendar

The 2011 JD Calendar is now available.

15 December JAAVSO v38 nr2 is now online!

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.

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