[Aavso-photometry] Comet 17P/Holmes

[Chuck Pullen]

I've noticed the central whatever in the images too.  A guy from a  
local star party says he saw the object in the center of the coma  
visually on Friday, so it's not hot or saturated pixels.  Using X- 
ephem and updated orbital elements, I don't see that the comet has  
passed any star much brigher than 18th mag or so in the last 4 days.   
Tonight it will be within 30 arc sec of a Tycho double star of about  
10th mag for each component.  If they show up in an image, they could  
be used as a very rough comp for the brightness of whatever this is.

Chuck

Chuck Pullen PCH