Hello Vince
Thank you for your nice large-field picture of Sirius. I have blown it up to approximate my much smaller field pictures. Your photo has been quite helpful in my study of the starfield around Sirius. I have been able to match most of the stars to my own images. I have been working with my new Celestron system. I have attached a pic of the field southwest of Sirius which displays one of the stars also seen in your photo. It's about 10th magnitude and I estimate separation of about 193 arcseconds and position angle of about 200 degrees from Sirius on March 25th. I can't seem to get this object to match up. I wonder if you tell me what was the date of your photo? I suspect I'm just making an error, but I also wonder whether there might have been some movement of the object (?). I have rotated my picture to orient North upward and West is to the right.
This is a stack of about 2500 frames. I'm starting to get an appreciation for the type of exposure I may need in order not to wash out the area where the pup might be seen.
Thanks, again,
Thad
Quote:
Originally Posted by Vince G
G'day Thad,
Sorry for my delay.
I uploaded a full image of Sirius taken with a 6 megapixel QHY8 camera.
The field of view is about 170x111 arc mins. A 1 sec exposure.
I hope you can adjust your seeing of this image, it's only a 50% jpeg.
North is up and east is to the left in this image.
If you point your scope south to a star then drive or push the tube down, you will then see the stars move to the northside of your eyepiece.
Again, if you drive or push the tube west, you will see the stars move to the east side of your eyepiece. More mirrors, more changes 
You may be able to image the pup with your equipment if you can increase the magnification and stack a lot of the images. There are a few good programs freely availabe for that purpose.
Welcome to our group.
Vincent |