Variable Stars

Variable Star Links

American Association of Variable Star Observers. The largest North American organization, lots of resources. Publishes JAAVSO, news letters, observing manuals, etc.
The Webb Society. A British organization with lots of resources. Publishes observers manuals, the famous Observers Guide series, the Deep Sky Observer, with both variable and double star papers as well as observing tips and other papers.
AAVSO list of international variable star groups. Find a group in your country!

TU Ind outburst caught by Bill Dillon 4 July 2007

external image tu_ind_anim2.gif

Using GRAS006 in Australia, Bill Dillon was the only observer to catch the 4 July 2007 outburst of Tu Ind, a "Dwarf Nova" of the U Geminorum
class of nova-like variables. This variable is poorly positioned (-45degrees) for observation from Mayhill, but superbly positioned from Australia.
Bill began his sequence on s July 2 UT, and ended on July 8 UT (only July 3 UT is missing). The star was in outburst on the 4th, then gradually faded. The image is cropped, so the square is about 8 arcminutes or so on a side (north at the top, west on the right). The star varies from about 14th to 17th magnitude.

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