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DDO 169

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(Redirected from UGC 8331) Galaxy in constellation Canes Venatici
DDO 169
DDO 169
Observation data (J2000 epoch)
ConstellationCanes Venatici
Right ascension13 15 30.31
Declination+47° 29′ 56.2″
Redshift+260 km/s
Distance6.03 / 8.23 Mpc
(19.7 / 26.8 million ly)
Apparent magnitude (V)14.61
Characteristics
TypeIAm
Apparent size (V)2.7′ × 0.9'
Other designations
UGC 8331, PGC 46127

DDO 169 (also known as UGC 8331) is an irregular galaxy located in the constellation Canes Venatici. It is a member of the M51 Group of galaxies and measures approximately 5 × 1.5 kiloparsecs (16,000 × 5,000 lightyears). The galaxy's large-scale structure is very unorganized and it has two clusters of stars in its outer portions in addition to the cluster in the center. These clusters make it practically impossible to determine the galaxy's rotation curve and contributes to a large variation in distance figures that are derived with different methods. The exact distance to the galaxy is not known, although a 1998 paper estimated the distance as 8.23 megaparsecs.

References

  1. ^ "NED results for UGC 8331". NED via University of California. Retrieved 2009-03-08.
  2. ^ I.D. Karachentsev; I.O. Drovdozsky (July 1998). "Distances to five resolved galaxies in the Canes Venatici cloud" (PDF). Astronomy and Astrophysics Supplement Series. Retrieved 2009-03-08.
  3. ^ R.A. Swaters; R. Sancisi; T.S. van Albada; J.M. van der Hulst (2009-01-27). "The rotation curves shapes of late-type dwarf galaxies". Astronomy and Astrophysics. 493 (3): 871–892. arXiv:0901.4222. Bibcode:2009A&A...493..871S. doi:10.1051/0004-6361:200810516. S2CID 14143255.


Constellation of Canes Venatici
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