Planetary Nebula NGC 7139

NGC 7139
NGC 7139: Planetarischer Nebel in Cepheus; 500 mm Cassegrain 3625 mm f/7.2; SBIG STL11K; 70+3*30 min LRGB; Bernese Highlands; © 2015 Radek Chromik

History

NGC 7139 was discovered on November 5, 1787 by the German-British astronomer Wilhelm Herschel and identified as a planetary nebula by the American astronomer Heber Doust Curtis in 1918.

Physical Properties

The apparent visual magnitude of NGC 7139 is about 13 magnitudes. The distance determination of planetary nebulae is often not reliable. In 2008 it gave a distance of about 1400 parsecs, about 4500 light years. Older estimates went from 2400 parsecs, about 7800 light years. [132, 141, 145, 196, 349]

«Strasbourg-ESO Catalogue of Galactic Planetary Nebulae» Acker et al., 1992 [141]
DesignationsPN G104.1+07.9: NGC 7139, PK 104+07.1, ARO 54, VV 270, VV' 557
Right Ascension (J2000.0)21h 46m 11s
Declination (J2000.0)63° 47' 16"
Dimensions 77." (optical)
Distance 2.4 kpc
Radial Velocity-54.4 km/s ± 3.4 km/s
Expansion Velocity 19.5 km/s (O-III)
C-Star DesignationsAG82 436
C-Star Magnitude18.72 mag (V filter)
DiscovererCURTIS 1918

Finder Chart

The planetary nebula NGC 7139 is located in the constellation Cepheus. The best viewing time is May to December when the constellation is highest in the night sky.

Chart NGC 7139
Chart created using SkySafari 6 Pro and STScI Digitized Sky Survey. [149, 160]

References

132SEDS: The Interactive NGC Catalog Online; spider.seds.org/ngc/ngc.html
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)
349«NGC 7139 and its stellar neighbourhood» Weinberger, R.; Ziener, R.; Astronomy and Astrophysics, Vol. 191, p. 297-302 (1988); February 1988; Bibcode:1988A%26A...191..297W