Galaxy Abell 11

Abell 11
Abell 11: Section of the PanSTARRS DR1. Here could be your picture. [147]


Abell 11 was discovered in 1964 by the American astronomer George Ogden Abell on the photo plates of the Palomar Observatory Sky Survey (POSS). He described its morphological appearance as «d» — a not so symmetrical ring of variable thickness. [332]

The two Czechoslovak astronomers Luboš Perek and Luboš Kohoutek compiled in 1967 a catalog of all the planetary nebulae of the Milky Way known at the time and listed Abell 11 as PK 196-12.1. [146]

In 1983 Abell 11 was observed by Julie H. Lutz and James B. Kaler with the Intensified Image Dissector Scanner (IIDS) at Kitt Peak National Observatory. They noted: «No emission lines were observed, even though the integration times should easily have been sufficient. A faint reddened continuum was observed at one position, and it is very probable that A 11 is a reflection nebula.» [649]

In 1987 French astronomer Agnès Acker and her co-authors published a study of misclassified planetary nebulae and doubted that Abell 11 was a planetary nebula The comment reads: «Not a PN? Reflection neb.? (LK 83); undet. (ESO, this work); no IRAS det.» [437]

Physical Properties

Based on data from the 2MASX sky survey published in 2006 Abell 11 is a galaxy. [650] This can also be verified on the images from the PanSTARRS DR1 survey. [147] However, not much seems to be known. It looks like a barred spiral galaxy with ring structure that shows tidal trails, possibly originating from a previous collision with another galaxy.

Object data from Simbad [145]
Designations PN A66 11, PK 196-12.1, 2MASX J05372154+0815290
Object Type Galaxy
RA (J2000.0) 05h 37m 21.567s
Dec (J2000.0) +08° 15' 29.29"
Magnitudes J 13.154; H 12.535; K 12.514

Finder Chart

The Galaxy Abell 11 is located in the constellation Orion. The best time to observe is September to March, when it is highest at night.

Finder Chart Galaxy Abell 11
Galaxy Abell 11 in constellation Orion. 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]

Visual Observation

400 mm Aperture: The position of Abell 11 can be clearly determined based on distinctive star formations. However, even at high magnification, nothing of the galaxy is discernible. — 400 mm f/4.5 Taurus Dobsonian, Hasliberg, 16. 12. 2023, SQM 21.2, Bernd Nies

Objects Within a Radius of 15°


  • [145] SIMBAD 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;
  • [147] Aladin Lite;
  • [149] SkySafari 6 Pro, Simulation Curriculum;
  • [160] The STScI Digitized Sky Survey;
  • [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
  • [437] «Misclassified planetary nebulae» Acker, A.; Chopinet, M.; Pottasch, S. R.; Stenholm, B.; Astronomy and Astrophysics, Suppl. Ser., Vol. 71, p. 163-175 (1987); Bibcode:1987A&AS...71..163A
  • [649] «MISCLASSIFIED AND MISIDENTIFIED PLANETARY NEBULAE AND NUCLEI» J. H. Lutz and J. B. Kaler; Publications of the Astronomical Society of the Pacific, Volume 95, Number 572, 1983; DOI:10.1086/131246
  • [650] «The Two Micron All Sky Survey (2MASS)» M. F. Skrutskie, R. M. Cutri, R. Stiening, M. D. Weinberg, S. Schneider, J. M. Carpenter, C. Beichman, R. Capps, T. Chester, J. Elias, J. Huchra, J. Liebert, C. Lonsdale, D. G. Monet, S. Price, P. Seitzer, T. Jarrett, J. D. Kirkpatrick, J. E. Gizis, E. Howard, T. Evans, J. Fowler, L. Fullmer, R. Hurt, R. Light, E. L. Kopan, K. A. Marsh, H. L. McCallon, R. Tam, S. Van Dyk, and S. Wheelock; The Astronomical Journal, Volume 131, Number 2, 2006; DOI:10.1086/498708