Astronomy:NGC 1998
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Short description: Galaxy in the constellation Pictor
| NGC 1998 | |
|---|---|
 NGC 1998, top-right from it is NGC 1995 | |
| Observation data (J2000.0 epoch) | |
| Constellation | Pictor |
| Right ascension | 05h 33m 15.7s[1] |
| Declination | −48° 41′ 44″[1] |
| Redshift | 0.015137[2] |
| Helio radial velocity | 4538[2] |
| Distance | 207 million |
| Apparent magnitude (V) | 14.3[3] |
| Apparent magnitude (B) | 15.2[3] |
| Characteristics | |
| Type | SO |
| Size | 0.90 x 0.5 arc minutes[3] |
| Other designations | |
| ESO 204-15, PGC 17434 | |
NGC 1998 (also known as ESO 204-15, PGC 17434) is a lenticular galaxy located in the Pictor constellation. It was discovered by John Herschel on December 28, 1834[4] and is about 207 million light-years from the Milky Way. Its apparent magnitude is 14.3.[3] and its size is 0.90 by 0.5 arc minutes.[3] In some sources such as SIMBAD, it is misidentified as nearby double star NGC 1995.[2]
References
- ↑ 1.0 1.1 "NED results for object NGC 1998". NED. http://ned.ipac.caltech.edu/cgi-bin/objsearch?objname=NGC+1998&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.
- ↑ 2.0 2.1 2.2 "NGC 1995". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+1995.
- ↑ 3.0 3.1 3.2 3.3 3.4 "Object: NGC 1998 (*)". SEDS. http://spider.seds.org/ngc/revngcic.cgi?NGC+1998.
- ↑ "Galaxy NGC 1998". cseligman. http://cseligman.com/text/atlas/ngc19a.htm#1998.
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