Astronomy:NGC 5502

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Short description: Galaxy within the constellation Ursa Major
NGC 5502
NGC5502 - SDSS DR14.jpg
SDSS image of NGC 5502
Observation data (J2000 epoch)
ConstellationUrsa Major
Right ascension 14h 09m 33.9s[1]
Declination+60° 24′ 34.3″[1]
Redshift0.02940[1]
Helio radial velocity8684 km/s[1]
Galactocentric velocity8949 km/s[2]
Distance400 ± 28 Mly
(122.6 ± 8.6 Mpc)[2]
Apparent magnitude (V)15.9[2]
Absolute magnitude (V)-19.5[nb 1]
Characteristics
TypeSa D[2]
Apparent size (V)0.63' x 0.29'[2]
Other designations
MCG+10-20-077, PGC 50508[1][3]

NGC 5502 (also known as NGC 5503) is a spiral galaxy in the constellation of Ursa Major,[3][4] registered in New General Catalogue (NGC).[1]

Observation history

NGC 5502 was discovered by Edward Swift (father) on 9 May 1885 and later double listed by Lewis Swift (son) two days later on 11 May 1885 as NGC 5503.[3] They gave descriptions "between two stars, one a wide double" and "forms with two stars a right triangle" respectively.[4] In the New General Catalogue, John Louis Emil Dreyer described the galaxy as "most extremely faint, very small, round, very difficult, 2 stars near".[3] The apparent difference in positions (2 arcmin) could have caused the confusions between NGC 5502 and NGC 5503.[3]

Notes

  1. ↑ Calculated from Galactocentric GSR Distance modulus[2]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 "NGC 5502". SIMBAD. http://simbad.u-strasbg.fr/simbad/sim-id?Ident=NGC%205502. 
  2. ↑ 2.0 2.1 2.2 2.3 2.4 2.5 "Results for object NGC 5502". NASA/IPAC Extragalactic Database. https://ned.ipac.caltech.edu/cgi-bin/objsearch?objname=NGC+5502&extend=no&hconst=73&omegam=0.27&omegav=0.73&corr_z=1&out_csys=Equatorial&out_equinox=J2000.0&obj_sort=RA+or+Longitude&of=pre_text&zv_breaker=30000.0&list_limit=5&img_stamp=YES#ObjNo1. 
  3. ↑ 3.0 3.1 3.2 3.3 3.4 Seligman, Courtney. "NGC 5502 (= PGC 50508 = NGC 5503)". Seligman website. https://cseligman.com/text/atlas/ngc55.htm. 
  4. ↑ 4.0 4.1 "NGC 5502". Deep Sky Observer's Companion – the online database. https://www.docdb.net/show_object.php?id=ngc_5502. 

Coordinates: Sky map 14h 09m 33.9s, +60° 24′ 34.3″



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