Planetary Nebula Abell 65

Abell 65
Abell 65: Section of DSS2 [147]


While searching for H-II regions on the photo plates of the «Palomar Observatory Sky Survey» made with the 48 inch Schmidt telescope, the American astronomer Stewart Sharpless found this nebula and listed it as Sh 2-52 with the remark «may be a planetary». He published his findings in 1959 in a catalog with a total of 313 nebulae. [310]

In 1964 the American astronomer George Ogden Abell identified Abell 65 to be a planetary nebula and published it in 1966. [332]

Physical Properties

Abell 65 is a double-shelled planetary nebula with a binary central star and a peanut-shaped bipolar structure, measuring 134 by 74 arcsecs. A best fitting model showed that the outer shell has a kinematical age of (15000 ± 5000) y/kpc and a symmetry axe at inclinations of (55 ± 10)° to the line of sight. The kinematical age of the inner shell is (8000 ± 3000) y/kpc and the symmetry axe is at (68 ± 10)°. Deep O-III imaging show filamentary structures to the north-east and south-west, suggesting a polar outflow of the nebula. The binary central star has an orbital period of circa one day. The distance of the planetary nebula to the Earth is about 1.7 kpc. [595]

Visual magnitudes through different filters: B 15.93, V 15.77, R 16.0, I 15.65, J 15.113, H 14.985, K 14.851. [145]

«Strasbourg-ESO Catalogue of Galactic Planetary Nebulae» Acker et al., 1992 [141]
DesignationsPN G017.3-21.9: A 65, PK 17-21.1, ARO 26, ESO 526-03, Sh 2- 52, VV' 513
Right Ascension (J2000.0)19h 46m 34s
Declination (J2000.0)-23° 08' 12"
Dimensions 100." (optical)
Radial Velocity+13.0 km/s ± 4.0 km/s
Expansion Velocity 11.0 km/s (O-III)
C-Star DesignationsAG82 384, CSI -23 -19436, UBV 16806
C-Star Magnitude15.01 mag (U filter), 15.99 mag (B filter), 15.90 mag (V filter)
C-Star Spectral TypeOp k
DiscovererABELL 1964

Finder Chart

The planetary nebula Abell 65 is located in the constellation Sagittarius a little offside between the Teapot and Capricornus. The best observation time is May to September.

Chart Planetary Nebula Abell 65
Planetary Nebula Abell 65 in constellation Sagittarius. Chart created using SkySafari 6 Pro and STScI Digitized Sky Survey. [149, 160]

Visual Observation

Pending ...

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);
145SIMBAD astronomical database;
147Aladin Lite; (2020-12-23)
149SkySafari 6 Pro, Simulation Curriculum;
160The STScI Digitized Sky Survey;
310«A Catalogue of H II Regions» Stewart Sharpless, US Naval Observatory, 1959; DOI:10.1086/190049; Bibcode:1959ApJS....4..257S
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
595«Spatio-kinematic modelling of Abell 65, a double-shelled planetary nebula with a binary central star» L. Huckvale, B. Prouse, D. Jones, M. Lloyd, D. Pollacco, J. A. López, T. J. O'Brien, L. Sabin, N. M. H. Vaytet Monthly Notices of the Royal Astronomical Society, Volume 434, Issue 2, 11 September 2013, Pages 1505–1512; arXiv:1306.4272; DOI:10.1093/mnras/stt1109