NGC 7814, Little Sombrero

NGC 7814
NGC 7814: Galaxy in Pegasus; 500 mm Cassegrain f/7.2; SBIG STL11K; 120-50-50-50 min LRGB; Bernese Highlands; © 2011 Radek Chromik

History

This galaxy was discovered on October 8, 1874 by the German-British astronomer William Herschel with his 18.7 inch reflecting telescope. He listed it as II 240, with class «II» standing for faint nebulae. He described it as «pretty faint, pretty large, irregularly round, easily resolvable» [463] John LE Dreyer entered the galaxy as NGC 7814 in his «New General Catalogue of Nebulae and Clusters of Stars» published in 1888. [313]

Physical Properties

The distances, determined by different methods, range from 12.8 Mpc to 19.2 Mpc (41.7 to 62.6 million light years). [145]. We are looking directly at the edge of this spiral galaxy, which is also called «Little Sombrero» because of its appearance with the prominent dust band, in reference to the Sombrero Galaxy Messier 104.

Just 10 arc minutes south is the small galaxy IC 5381, discovered photographically on November 17, 1895 by the British astronomer Isaac Roberts with a 20 inch reflecting telescope. [277] It is located at a distance of 206 Mpc (672 million light years) much more distant than NGC 7814 and has nothing to do with this galaxy. [145]

«Catalogue of Principal Galaxies (PGC)», Paturel et al. 1989 [144]
NameRA [hms]Dec [dms]mTypeDim [']Btot [mag]HRV [km/s]PA [°]
IC 538100 03 11.5+15 57 56S1.3 x .314.954
NGC 781400 03 15.0+16 08 45S4.7 x 2.411.61054135

Finder Chart

The galaxy NGC 7814 is located in the constellation Pegasus. The best observation time is June to November, when it is highest at night.

Chart NGC 7814
Chart created using SkySafari 6 Pro and STScI Digitized Sky Survey. [149, 160]

References

144Catalogue of Principal Galaxies (PGC); Paturel G., Fouque P., Bottinelli L., Gouguenheim L.; Astron. Astrophys. Suppl. Ser. 80, 299 (1989); cdsarc.unistra.fr/viz-bin/cat/VII/119 (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
277«Historische Deep-Sky Kataloge» von Dr. Wolfgang Steinicke; klima-luft.de/steinicke (2021-02-17)
313«A New General Catalogue of Nebulae and Clusters of Stars, being the Catalogue of the late Sir John F.W. Herschel, Bart., revised, corrected, and enlarged» Dreyer, J. L. E. (1888); Memoirs of the Royal Astronomical Society. 49: 1–237; Bibcode:1888MmRAS..49....1D
463«Catalogue of one thousand new nebulae and clusters of stars» William Herschel, Philosophical Transactions of the Royal Society of London, 1 January 1786; DOI:10.1098/rstl.1786.0027