NGC 6789

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NGC 6789
NGC 6789 hst 09162 R814B606.png
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]
Heliocentric 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 August 30, 1883. [5] It is located within the Local Void, a region of space with far fewer galaxies than its surroundings. [4]

Contents

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. 1 2 3 4 "NGC 6789". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 19 June 2019.
  2. 1 2 3 "NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved 19 June 2019.
  3. 1 2 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. 1 2 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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