Location of photoLexington, Ohio
Date/Time of photoMarch 30, 2009
DescriptionSBIG ST-4000XCM, 18x600sec, Imager Temp -20C
APM/TMB 130/780, Severe Crop (~200%)
Abell 39 (PK47+42.1), a member of George Abell's Catalog of Planetery Nebulae is a low surface brightness planetary nebula in the constellation Hercules.
The most sperical planetary nebula, it is almost a perfect sphere - also one of the largest known spheres with a radius of about 2.5 light-years.