Planetary Nebula Abell 82

Abell 82
Abell 82: Planetary nebula in Cassiopeia; 500 mm Cassegrain f=5800 mm f/11.4 + SBIG STL11K; 360+90+90+90 min LRGB; Bernese Highlands; © 2015 Radek Chromik

History

The planetary nebula Abell 82 (PN A55 68, PN A66 82, PK 114-04.1, PN ARO 114) was discovered in 1955 by the American astronomer George Ogden Abell on the photo plates of the «Palomar Observatory Sky Survey» (POSS) discovered. Most of these 86 PNs discovered on the POSS photo plates are large and have a low surface brightness, which suggests that their stage of development is advanced. Abell described the PN as an imperfect homogeneous disk with a 94" diameter. At that time he could not clearly identify a central star. [331, 332]

Physical Properties

Distances range from 1887 to 2014 parsecs. The apparent brightnesses in different filters are: J = 12.4 mag, H = 11.8 mag, K = 11.7 mag. [145]

«Strasbourg-ESO Catalogue of Galactic Planetary Nebulae» Acker et al., 1992 [141]
DesignationsPN G114.0-04.6: A 82, PK 114-04.1, A55 68, ARO 114, VV' 579
Right Ascension (J2000.0)23h 45m 48s
Declination (J2000.0)57° 04' 01"
Dimensions 94." (optical), 81." (radio)
Radial Velocity-30.5 km/s ± 3.3 km/s
Expansion Velocity 25. km/s (O-III), 32.5 km/s (N-II)
C-Star DesignationsAG82 456
C-Star Magnitude16.20 mag (B filter), 14.92 mag (V filter)
DiscovererABELL 1955

Finder Chart

The planetary nebula Abell 82 is located in the constellation Cassiopeia and is circumpolar for Central Europe. The best time to observe is July to January, when it is highest at night.

Chart Abell 82
Chart created using SkySafari 6 Pro and STScI Digitized Sky Survey. [149, 160]

References

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); cdsarc.unistra.fr/viz-bin/cat/V/84 (2021-02-18)
145SIMBAD astronomical database; simbad.u-strasbg.fr/simbad
149SkySafari 6 Pro, Simulation Curriculum; skysafariastronomy.com
160The STScI Digitized Sky Survey; archive.stsci.edu/cgi-bin/dss_form
331«Globular Clusters and Planetary Nebulae Discovered on the National Geographic Society-Palomar Observatory Sky Survey» Abell, G. O.; Publications of the Astronomical Society of the Pacific, Vol. 67, No. 397, p.258-261, August 1955; DOI:10.1086/126815; Bibcode:1955PASP...67..258A
332«Properties of Some Old Planetary Nebulae» Abell, G. O.; Astrophysical Journal, vol. 144, p.259, April 1966; DOI:10.1086/148602; Bibcode:1966ApJ...144..259A