Perseus OB1

Perseus OB1
Double cluster at the heart of Per OB1
Credit: Chrisguidry
Observation data (J2000 epoch)
ConstellationPerseus
Right ascension02h 21m [1][2]
Declination+57.6°[1][2]
Mean distance6.0 kly (1.83 kpc)[3]
Span1,000 × 750 light years[4]
Radial velocity−43.4[5] km/s
Physical characteristics
Members149[6]
OB stars≥65[7]
Other designationsPer OB1[1]
See also: Stellar association, Moving groups

Perseus OB1 is an OB association in the Northern Celestial Hemisphere in the constellation Perseus. It is centered around the double cluster (NGC 869 and NGC 884),[6] and has lent its name to the Perseus Arm of the Milky Way.[8] The brightest member of the association is the blue supergiant 9 Persei.[4]

  1. ^ a b c Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference Sitnik2003 was invoked but never defined (see the help page).
  3. ^ Melnik, A. M.; Dambis, A. K. (2020). "Distance scale for high-luminosity stars in OB associations and in field with Gaia DR2. Spurious systematic motions". Astrophysics and Space Science. 365 (7): 112. arXiv:2006.14649. Bibcode:2020Ap&SS.365..112M. doi:10.1007/s10509-020-03827-0. S2CID 220128144.
  4. ^ a b Cite error: The named reference Craig2012 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference MelNik2009 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Lee2008 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Beech1995 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Inglis2013 was invoked but never defined (see the help page).