Planetary Nebula Kohoutek 1-1 (Abell 27)

Kohoutek 1-1 (Abell 27)
Kohoutek 1-1 (Abell 27): Section of DECam Plane Survey (DECaPS) DR2 [147]


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]

«Strasbourg-ESO Catalogue of Galactic Planetary Nebulae» Acker et al., 1992 [141]
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.

Finder Chart Planetary Nebula Kohoutek 1-1 (Abell 27)
Planetary Nebula Kohoutek 1-1 (Abell 27) in constellation Pyxis. Charts created using SkySafari 6 Pro and STScI Digitized Sky Survey. Limiting magnitudes: Constellation chart ~6.5 mag, DSS2 close-ups ~20 mag. [149, 160]

Objects Within a Radius of 15°