Planetary Nebula Abell 13
The planetary nebula Abell 13 (PK 204-8.1) was discovered by the American astronomer George Ogden Abell on the photo plates of the Palomar Observatory Sky Survey (POSS) in 1955. Most of the 86 PNs discovered on the POSS photo plates are large and have one low surface brightness, which suggests an advanced age of their developmental stage. [331, 332]
The PN is located at a distance of about 1.2 kpc. The brightness of the nebula, which is around 2.5 arc minutes in size, is 19.87 mag in the V-band and 19.87 mag in the B-band 06/20 mag. 
|Designations||PN G204.0-08.5: A 13, PK 204-08.1, A55 9, ARO 124, VV' 38, YM 28|
|Right Ascension (J2000.0)||06h 04m 47s|
|Declination (J2000.0)||+03° 56' 27"|
|Expansion Velocity||20. km/s (O-III), 22.5 km/s (N-II)|
|C-Star Designations||AG82 58, CSI +03 -06022, UBV 6150|
|C-Star Magnitude||19.06 mag (U filter), 20.06 mag (B filter), 19.87 mag (V filter)|
The planetary nebula Abell 13 is located in the constellation Orion, about 13 arc minutes south of the 5.6 mag bright star 66 Orionis. The best observation time is October to February.
Description pending ...