Planetary Nebula Kohoutek 1-11 (Abell 22)

Kohoutek 1-11 (Abell 22)
Kohoutek 1-11 (Abell 22): Section of DSS2 [147]


The planetary nebula K 1-11 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: nebula of a rhomboid shape and of mean densitiy with two opposite condensaton regions. Dimensions of the rhomboid: 105" in base-line, 68" in width. Central star mR ~20 mag. On the blue print: faint nebula of the same dimensions; central star mB = 19.2 mag.» [436]

George Ogden Abell listed in 1966 this planetary as number 22 and noted: «Appears as a small parallelogram surrounded by a large 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 215+11.1. [146]

Physical Properties

«Strasbourg-ESO Catalogue of Galactic Planetary Nebulae» Acker et al., 1992 [141]
Designations PN G215.6+11.1: K 1-11, PK 215+11.1, A 22, ARO 133
Right Ascension (J2000.0) 07h 36m 07s
Declination (J2000.0) +02° 42' 17"
Dimensions 84." (optical)
Radial Velocity +26.8 ± 2.8 km/s
C-Star Designations 1A 0733 +02, AG82 84, CSI +02 -07335, DDO 45, UBV 7306
C-Star Magnitude U: 18.07, B: 19.24, V: 19.59
Discoverer KOHOUTEK 1963

Finder Chart

The Planetary Nebula Kohoutek 1-11 is located in the constellation Canis Minor The best time to observe is October to April, when it is highest at night.

Finder Chart Planetary Nebula Kohoutek 1-11 (Abell 22)
Planetary Nebula Kohoutek 1-11 (Abell 22) in constellation Canis Minor. 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]

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