NGC 5308 explained

NGC 5308
Epoch:	J2000
Constellation Name:	Ursa Major
Ra:	^[1]
Z:	0.006665^[2]
H Radial V:	1998 km/s
Dist Ly:	29.275+/-
Group Cluster:	NGC 5322 group^[3]
Type:	S0^−
Size:	31640pc
Appmag B:	12.5
Size V:	3.7 × 0.7
Names:	UGC 8722, MGC+10-20-029, PGC 48860^[4]

NGC 5308 is an edge-on lenticular galaxy in the constellation of Ursa Major. It was discovered on 19 March 1790 by William Herschel.^[5] It was described by John Louis Emil Dreyer as "bright, pretty large" when he compiled the New General Catalogue.^[6] A small, irregular galaxy near NGC 5308 has been given the designation LEDA 2802348.^[7]

NGC 5308 was imaged by the Hubble Space Telescope in 2016. The galaxy appears to be a flat, smooth disk, typical of most lenticular galaxies. Many large globular clusters orbit the galaxy; these are visible as tiny dots surrounding the galaxy, and are mostly made of old, aging stars similar to the galaxy itself.^[8]

Notes and References

1. 2003yCat.2246....0C . VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003) . CDS/ADC Collection of Electronic Catalogues . II/246 . 2246 . Cutri . Roc M. . Skrutskie . Michael F. . Van Dyk . Schuyler D. . Beichman . Charles A. . Carpenter . John M. . Chester . Thomas . Cambresy . Laurent . Evans . Tracey E. . Fowler . John W. . Gizis . John E. . Howard . Elizabeth V. . Huchra . John P. . Jarrett . Thomas H. . Kopan . Eugene L. . Kirkpatrick . J. Davy . Light . Robert M. . Marsh . Kenneth A. . McCallon . Howard L. . Schneider . Stephen E. . Stiening . Rae . Sykes . Matthew J. . Weinberg . Martin D. . Wheaton . William A. . Wheelock . Sherry L. . Zacarias . N. . 2003 .
2. Web site: NED results for object NGC 5308. 21 February 2017. .
3. NGC 5322. 21 February 2017.
4. NGC 5308. 21 February 2017.
5. Web site: New General Catalogue objects: NGC 5300 – 5349. Seligman, Courtney. cseligman.com. 21 February 2017.
6. Web site: NGC 5308 – SEDS. seds.org. 21 February 2017.
7. LEDA 2802348. 21 February 2017.
8. Supernova 1996bk in NGC 5308. Mazza, P.. etal. IAU Circ.. 6491. 1. 1996. 1996IAUC.6491....1M.
9. Web site: Busy bees | ESA/Hubble|date=2016|website=spacetelescope.org|accessdate=21 February 2017}}

   SN 1996bk, a type Ia supernova

   ], was discovered in NGC 5308 in October 1996. The supernova was 10.5" south and 17.9" west of center of the galaxy, and had an apparent visual magnitude of 15.^[8]

   External links

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