View Single Post
  #33  
Old 14-02-2009, 06:34 AM
Enchilada
Enhanced Astronomer

Enchilada is offline
 
Join Date: Nov 2008
Location: Sydney, Australia
Posts: 753
Post V Hydra Info

Quote:
Originally Posted by glenc View Post
When is the next max?
Glen

The last visual observation on the 19th January finds it is 9.2v magnitude and falling. It reached its peak brightness in mid-November 2008.
Based on the 530.7 day period, I'd say you will find it about 10th magnitude. I wouldn't dally though, as by around May it will not be well placed. The latest AAVSO data, shows the observations as per the attachment. As you can see it is fading fast. (See the black line)

You can generate this curve yourself at; http://www.aavso.org/data/lcg/

Object as V Hya, "Plot last" at 1000 days.

The next maxima, sadly, will be about February 2010 - being well placed for southern observers as well near the zenith...

A suitable finder chart is at the same site, as;
http://www.aavso.org/cgi-bin/shrinkw...HYA/VHYA-A.GIF or

With fainter stars at its fainter magnitude (like now), use;

http://www.aavso.org/cgi-bin/shrinkw...YA/VHYA-BR.GIF

Hava good one!

Hope this helps...

Encha..
(Nicknaming you avatar... now its getting a bit too serious!! )
Attached Thumbnails
Click for full-size image (vhyalcurve.jpg)
24.4 KB14 views
Reply With Quote