Planetary Nebula Kohoutek 1-1 (Abell 27)
History
The planetary nebula K 1-1 was discovered in 1962 by the Czech astronomer Luboš Kohoutek on the photo plates of the «Palomar Observatory Sky Survey» (POSS). He wrote: «On the red print: elliptic disc 55" x 45" of mean density with two symmetrical condensations at the periphery in the direction of the minor axis, and with suggestion of a ring. Faint trace of central star ~20 mag with uncertain identification. There is no nebula on the blue print.» [180]
George Ogden Abell listed in 1966 this planetary as number 27 and described it with «e» as «a ring with gaps (incomplete ring)» [332]
The nebula was later included in the «Catalog of Galactic Planetary Nebulae» (CGPN) compiled by Luboš Perek and Luboš Kohoutek in 1967 and was given the designation PK 252+4.1, derived from the galactic coordinates and the order of PN's discovered in the 1°x1° square. [146]
Physical Properties
According to Simbad the heliocentric distance is ~2.3 kpc. [145]
| Designations | PN G252.6+04.4: K 1- 1, PK 252+04.1, A 27, ESO 431-14 |
| Right Ascension (J2000.0) | 08h 31m 53s |
| Declination (J2000.0) | -32° 06' 07" |
| Dimensions | 43." (optical) |
| C-Star Designations | AG82 103 |
| C-Star Magnitude | B: 15.20, V: 13.93 |
| C-Star Spectral Type | G-K |
| Discoverer | KOHOUTEK 1962 |
Finder Chart
The Planetary Nebula Kohoutek 1-1 is located in the constellation Pyxis. The best time to observe is December to March, when it is highest at night, although in Switzerland it rises only about 10° above the southern horizon.
