Astronomy:NGC 6789
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Short description: Irregular galaxy in the constellation Draco
| NGC 6789 | |
|---|---|
 Hubble Space Telescope image of NGC 6789 | |
| Observation data (J2000 epoch) | |
| Constellation | Draco |
| Right ascension | 19h 16m 41s[1] |
| Declination | +63° 58′ 23″[1] |
| Redshift | −0.000470[2] |
| Helio radial velocity | −141 ± 9 km/s[2] |
| Distance | 12 Mly (3.6 Mpc)[3] |
| Apparent magnitude (B) | 13.76[1] |
| Characteristics | |
| Type | Im[2] |
| Other designations | |
| NGC 6789,MCG+11-23-001, LEDA 63000[1] | |
NGC 6789 is a void[4] irregular galaxy in the constellation Draco. It was discovered by Lewis Swift on Aug 30, 1883.[5] It is located within the Local Void, a region of space with far fewer galaxies than its surroundings.[4]
NGC 6789 is the nearest blue compact dwarf (BCD) galaxy to the Milky Way. It is chemically homogeneous and relatively metal-poor.[3]
See also
References
- ↑ 1.0 1.1 1.2 1.3 "NGC 6789". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+6789.
- ↑ 2.0 2.1 2.2 "NASA/IPAC Extragalactic Database". http://ned.ipac.caltech.edu/cgi-bin/objsearch?search_type=Obj_id&objid=47146&objname=1&img_stamp=YES&hconst=73.0&omegam=0.27&omegav=0.73&corr_z=1#BasicData_0.
- ↑ 3.0 3.1 García-Benito, R.; Pérez-Montero, E. (2012). "Auto-consistent metallicity and star formation history of the nearest blue compact dwarf galaxy NGC 6789". Monthly Notices of the Royal Astronomical Society 423 (1): 406–421. doi:10.1111/j.1365-2966.2012.20885.x. Bibcode: 2012MNRAS.423..406G.
- ↑ 4.0 4.1 Lelli, Federico; Verheijen, Marc; Fraternali, Filippo (2014). "The triggering of starbursts in low-mass galaxies". Monthly Notices of the Royal Astronomical Society 445 (2): 1694–1712. doi:10.1093/mnras/stu1804. Bibcode: 2014MNRAS.445.1694L.
- ↑ Seligman, Courtney. "New General Catalog Objects: NGC 6750 - 6799". https://cseligman.com/text/atlas/ngc67a.htm#6789.
External links
- NGC 6789 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
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