Planetary Nebula Abell 57
This planetary nebula was discovered in 1955 by the American astronomer George Ogden Abell on the photo plates of the «Palomar Observatory Sky Survey» (POSS). In 1955 he published a first list of 13 globular clusters and the positions of 73 planetary nebulae. The PN had the number 46 (A55 46). In 1966 Abell published a complete list including the size and description of the 86 planetary nebulae discovered on the POSS photo plates. This planetary nebula was then number 57 on his list. The designation PK 58+06.1 comes from the two Czechoslovak astronomers Luboš Perek and Luboš Kohoutek, who in 1967 compiled a catalog of all the planetary nebulae of the Milky Way known at that time. [331, 332]
Abell 57 is an old and very faint planetary nebula. Magnitudes through different filters are: B 17.903, V 17.734, R 17.451, I 17.21. 
|Designations||PN G058.6+06.1: A 57, PK 58+06.1, A55 46, ARO 149, VV' 490|
|Right Ascension (J2000.0)||19h 17m 03s a|
|Declination (J2000.0)||+25° 37' 26" a|
|C-Star Designations||AG82 359, CSI +25 -19150, UBV 16325|
|C-Star Magnitude||16.97 mag (U filter), 17.86 mag (B filter), 17.66 mag (V filter)|
This planetary nebula can be found in the constellation Vulpecula and is highest in the sky from the months March through December.
Description pending ...