NGC 6820 and NGC 6823

NGC 6820 is a small reflection nebula near the open cluster NGC 6823 in Vulpecula. The reflection nebula and cluster are embedded in a large faint emission nebula called Sh 2-86. The whole area of nebulosity is often referred to as NGC 6820.[3]

Emission Nebula NGC6820 with Open Cluster NGC6823
Emission nebula
NGC 6820/NGC 6823
Observation data: J2000.0 epoch
Right ascension19h 42m 27.92s[1]
Declination+23° 05′ 14.7″[1]
Distance6,000[2] ly
Apparent dimensions (V)40 arcmins
ConstellationVulpecula
DesignationsNebula (NGC 6820, Sh2-86)

M27, the Dumbbell Nebula, is found three degrees to the east, and α Vulpeculae three degrees to the west.

Open star cluster NGC 6823 is about 50 light-years across and lies about 6,000 light-years away. The center of the cluster formed about two million years ago and is dominated in brightness by a host of bright young blue stars. Outer parts of the cluster contain even younger stars.[2] It forms the core of the Vulpecula OB1 stellar association.[4]

  • NGC 6820/NGC 6823 – Courtesy: Hunter Wilson
    NGC 6820/NGC 6823 – Courtesy: Hunter Wilson

References
  1. "NGC 6820". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2008-07-03.
  2. Nemiroff, R.; Bonnell, J., eds. (4 October 2004). "NGC 6823: Cloud Sculpting Star Cluster". Astronomy Picture of the Day. NASA. Retrieved 2008-07-03.
  3. "Sharpless 86". Retrieved 2017-11-19.
  4. Billot, N.; Noriega-Crespo, A.; Carey, S.; Guieu, S.; Shenoy, S.; Paladini, R.; Latter, W. (2010). "Young Stellar Objects and Triggered Star Formation in the Vulpecula Ob Association". The Astrophysical Journal. 712 (2): 797. arXiv:1003.0866. Bibcode:2010ApJ...712..797B. doi:10.1088/0004-637X/712/2/797. S2CID 28961682.
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