NGC 6789

NGC 6789
Hubble Space Telescope image of NGC 6789
Observation data (J2000 epoch)
ConstellationDraco
Right ascension19h 16m 41s[1]
Declination+63° 58′ 23″[1]
Redshift−0.000470[2]
Heliocentric radial velocity−141 ± 9 km/s[2]
Distance12 Mly (3.6 Mpc)[3]
Apparent magnitude (B)13.76[1]
Characteristics
TypeIm[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. ^ a b c d "NGC 6789". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 19 June 2019.
  2. ^ a b c "NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved 19 June 2019.
  3. ^ a b 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. arXiv:1203.2186. Bibcode:2012MNRAS.423..406G. doi:10.1111/j.1365-2966.2012.20885.x. S2CID 119163529.
  4. ^ a b 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. arXiv:1409.1239. Bibcode:2014MNRAS.445.1694L. doi:10.1093/mnras/stu1804.
  5. ^ Seligman, Courtney. "New General Catalog Objects: NGC 6750 - 6799". New General Catalog Objects: NGC 6750 - 6799. Retrieved 19 June 2019.


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