Fetus Nebula (NGC 7008)

Object Description

NGC 7008
NGC 7008: Fetus Nebula in Cygnus; 500 mm Cassegrain 3625 mm f/7.2; SBIG STL11K; 100+3*30 min LRGB; Bernese Highlands; © 2011 Radek Chromik

Nebula NGC 7008 was discovered by Wilhelm Herschel on 14 October 1787. [196] The American astronomer Francis G. Pease recognized its nature as a planetary nebula in 1917, the shed shell of a red giant that has used up all its hydrogen and has evolved into a white dwarf in the final stage. [141] The apparent magnitudes of the nebula measured with different filters are: R 13.2 mag, J 11.8 mag, H 11.5 mag, K 11.4 mag. The distance from Earth is 869 parsecs, around 2800 light years. [145]

South of NGC 7008 is another binary star system. The main star HD 235422 of spectral type K7 has an apparent visual magnitude of 9.5 mag and its companion HJ 1606 appears 11.6 mag bright. The two 18.7 arc seconds separated stars are at a distance of 469 parsecs, about 1500 light-years and are therefore unrelated to the planetary nebula. [145]

«Strasbourg-ESO Catalogue of Galactic Planetary Nebulae» Acker et al., 1992 [141]
DesignationsPN G093.4+05.4: NGC 7008, PK 93+05.2, ARO 39, VV 258, VV' 540
Right Ascension (J2000.0)21h 00m 33s
Declination (J2000.0)+54° 32' 29"
Dimensions 86." (optical), 95." (radio)
Distance 1.3 kpc
Radial Velocity-74.2 km/s ± 2.0 km/s
Expansion Velocity 40.0 km/s (O-III)
C-Star DesignationsAG82 417, CSI +54 -20591, GCRV 13203, PLX 5049
C-Star Magnitude12.99 mag (U filter), 13.75 mag (B filter), 13.23 mag (V filter)
C-Star Spectral TypeO7, O(H)
DiscovererPEASE 1917

Finder Chart

The planetary nebula NGC 7008 is located in the constellation Cygnus. The best observing time is April to November, when the PN is highest in the night sky.

Chart Fetus Nebula (NGC 7008)
Fetus Nebula (NGC 7008) in constellation Cygnus. Chart created using SkySafari 6 Pro and STScI Digitized Sky Survey. [149, 160]

More Objects Nearby (±15°)

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
196Celestial Atlas by Curtney Seligman; cseligman.com/text/atlas.htm (2020-12-28)