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 (north is down)
Credit: Jeff Johnson
Observation data: J2000.0 epoch
Right ascension 19h 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 6000 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.

References
  1. "NGC 6820". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2008-07-03.
  2. Nemiroff, R.; Bonnell, J., eds. (4 October 2004). Astronomy Picture of the Day. NASA https://apod.nasa.gov/apod/ap041004.html. Retrieved 2008-07-03. Missing or empty |title= (help)
  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.
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