Planetary Nebula Kohoutek 1-20

Kohoutek 1-20
Kohoutek 1-20: Planetary nebula in Andromeda; 500 mm Cassegrain f/7.2; SBIG STL11K; 60-10-10-10 min LRGB; Bernese Highlands; © 2011 Radek Chromik [32]


The planetary nebula K 1-20 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 there is a weak elliptical ring measuring 36" x 28" and 37 "x 31" on the blue print of the same shape. Central star 20.1 mag.» [436] The nebula was included in the «Catalog of Galactic Planetary Nebulae» (CGPN) compiled by Luboš Perek and Luboš Kohoutek in 1967 and was given the designation PK 110-12.1. [146]

Physical Properties

The distance is given as 4207 parsecs. A value for an apparent brightness could not be found. [145]

«Strasbourg-ESO Catalogue of Galactic Planetary Nebulae» Acker et al., 1992 [141]
Designations PN G110.6-12.9: K 1-20, PK 110-12.1, Anon.23h24m, ARO 384
Right Ascension (J2000.0) 23h 39m 09s
Declination (J2000.0) +48° 12' 38"
Dimensions 33." (optical)
C-Star Designations AG82 455
C-Star Magnitude B: 20.7
Discoverer KOHOUTEK 1963

Finder Chart

The Planetary Nebula Kohoutek 1-20 is located in the constellation Andromeda. A striking hexagon with the weak reflection nebula GN 23.35.4 serves as a locator. From there you shimmy along the stars about half a degree to the southeast. See 1° DSS inlet. The best time to observe is June to February, when it is highest at night.

Finder Chart Planetary Nebula Kohoutek 1-20
Planetary Nebula Kohoutek 1-20 in constellation Andromeda. 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°