NGC 659

NGC 659
NGC 659 along with IC 166, NGC 654, and NGC 663
Observation data (J2000.0 epoch)
Right ascension	01h 44m 04s [1]
Declination	+60° 40′ [1]
Distance	8.2 kly [2]
Apparent magnitude  (V)	7.9 [1]
Apparent dimensions (V)	6.0′ [3]
Physical characteristics
Mass	105 to 106  M☉
Radius	7.5 [2]
Estimated age	20my [2]
Other designations	NGC 659, Cr 19, OCL 332
Associations
Constellation	Cassiopeia
See also: Open cluster, List of open clusters

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. "NGC 659 – Open (galactic) Cluster". Simbad. Retrieved 27 July 2015.
2. 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

External links

• Media related to NGC 659 at Wikimedia Commons
• NGC 659 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
• SEDS – NGC 659