Ed Bianchina's Astronomy


Planatary Nebula

NGC 7662 - Blue Snowball Nebula

« Back to Album Photo 8 of 9 Previous | Next
NGC 7662 - Blue Snowball Nebula
NGC 7662 otherwise known as the Blue Snowball Nebula is a planetary nebula located in the constellation Andromeda. The distance to this nebula is not known with any real accuracy. According to the Skalnate Pleso Catalogue (1951) the distance of NGC 7662 is about 1,800 light years, the actual diameter about 20,000 AU. In a more recent survey of the brighter planetaries, C.R.O'Dell (1963) derived a distance of 1,740 parsecs or about 5,600 light years, increasing the actual size to 0.8 light year, or nearly 50,000 AU. It has a faint central star that is variable, with a magnitude range of 12 to 16. The central star is a bluish dwarf with a continuous spectrum and a computed temperature of about 75,000K. The nuclei of the planetary nebulae are among the hottest stars known. In the photo I provide a reference image from a large telescope and a close up. This was taken with my 9.25 SCT using a Lumicon Giant Easy Glider. My first attempt.
Posted on September 2, 2010 Full Size| Slideshow