Planetary Nebula Kohoutek 1-7
History
The planetary nebula K 1-7 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: black circular disk 34" x 36" without any details. On the blue print: dark circular disk 32" x 35" with the suggestion of a central star ~19.7m.» [436]
George Ogden Abell listed in 1966 this planetary as Abell 10 and noted: «Nebula appears as a disk with bright stripes.» [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 197-14.1. [146]
Physical Properties
Given distances vary from 3800 pc to 5000 pc. [145]
| Designations | PN G197.2-14.2: K 1- 7, PK 197-14.1, A 10, ARO 176 |
| Right Ascension (J2000.0) | 05h 31m 48s |
| Declination (J2000.0) | +06° 56' 09" |
| Dimensions | 34." (optical), 20." (radio) |
| Radial Velocity | +57.6 km/s ± 3.5 km/s |
| C-Star Designations | AG82 46 |
| C-Star Magnitude | 20.2 mag (B filter) |
| Discoverer | KOHOUTEK 1963 |
Finder Chart
The Planetary Nebula Kohoutek 1-7 is located in the constellation Orion The best time to observe is September to March, when it is highest at night.
