NGC 659

NGC 659
Observation data (J2000.0 epoch)
Right ascension01h 44m 04s[1]
Declination+60° 40′[1]
Distance8.2 kly[2]
Apparent magnitude (V)7.9[1]
Apparent dimensions (V)6.0′[3]
Physical characteristics
Mass105 to 106 M☉
Radius7.5[2]
Estimated age20my[2]
Other designationsNGC 659, Cr 19, OCL 332
Associations
ConstellationCassiopeia
Map showing the location of NGC 659

NGC 659 , also known as the Yin-Yang Cluster[4] is an open cluster in the Cassiopeia constellation. It was discovered by Caroline Herschel in 1783.[2] It was later described by William Herschel as "A beautiful cluster of pretty large stars near 15' diameter considerably rich".[5] It is located in the sky almost directly next to NGC 663.

References

  1. ^ a b c "NGC 659 – Open (galactic) Cluster". Simbad. Retrieved 27 July 2015.
  2. ^ a b c d O'Meara, Stephen James (2007). Deep-Sky Companions: Hidden Treasures. Cambridge University Press. p. 48. ISBN 9780521837040.
  3. ^ Seligman, Courtney. "Celestial Atlas: NGC Objects: NGC 650 – 699". cseligman.com. Archived from the original on 4 November 2015. Retrieved 27 July 2015.
  4. ^ https://www.astronomy.com/science/the-yin-yang-cluster-ngc-659-open-cluster-ngc-559-and-barred-spiral-galaxy-ngc-672/
  5. ^ https://www.deepskycorner.ch/obj/ngc663.en.php



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