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


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 ". 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]
DesignationsPN 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 DesignationsAG82 455
C-Star Magnitude20.7 mag (B filter)
DiscovererKOHOUTEK 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 July to February, when it is highest at night.

Chart Planetary Nebula Kohoutek 1-20
Planetary Nebula Kohoutek 1-20 in constellation Andromeda. Chart created using SkySafari 6 Pro and STScI Digitized Sky Survey. [149, 160]

More Objects Nearby (±15°)


141Strasbourg-ESO Catalogue of Galactic Planetary Nebulae; A. Acker, F. Ochsenbein, B. Stenholm, R. Tylenda, J. Marcout, C. Schohn; European Southern Observatory; ISBN 3-923524-41-2 (1992); (2021-02-18)
145SIMBAD astronomical database;
146«Version 2000 of the Catalogue of Galactic Planetary Nebulae» L. Kohoutek, A&A Volume 378, Number 3, November II 2001; DOI:10.1051/0004-6361:20011162
149SkySafari 6 Pro, Simulation Curriculum;
160The STScI Digitized Sky Survey;
436«New planetary nebulae» Kohoutek, L.; Bulletin of the Astronomical Institute of Czechoslovakia, vol. 14, p.70, 1963; Bibcode:1963BAICz..14...70K