Blue Snowball (NGC7662) Planetary Nebula in Andromeda
(RA 23h 25.9m , Dec. +42°33', 8.3 mag., >12" in diameter)
This bright planetary nebula presents blue disk at high power even in small telescopes. It is located in the Western part of constellation 3°20' SWW of i Andromedae (see finder chart below).
The image above was taken on October 23, 2000 from Harrowsmith, Ontario. It was a very clear and calm night with some auroral activity. However, fter acquiring all integration, I did notice frost accumulated on a corrector plate! Cookbook 245 LDC camera was used on Celestron Ultima 8 SCT with eyepiece projection to achieve f20. White (9 x 30 sec.) exposures were combined with cyan, magenta and yellow-filtered images (4 x 30 sec. each) using AIP4WIN software and the image was furter adjusted using Lab color space with Corel PhotoPaint 8.
Only a quater of the original Cookbook frame is shown. North is to the left.
Map created in Guide 7.0 - 7°45' x 10°. North is up.
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© Jan Wisniewski