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Sh 2-101

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Sh2-101
Emission nebula
H II region
Observation data: J2000.0 epoch
Right ascension20h 00m 29.37s
Declination35° 19′ 13.9″
Distance6,000 ly   (1,800 pc)
Apparent magnitude (V)9.0
Apparent dimensions (V)16' x 9'
ConstellationCygnus
DesignationsSharpless 101, Sh2-101, Cygnus Star Cloud
See also: Lists of nebulae

Sharpless 101 (Sh2-101) is a H II region[1] emission nebula located in the constellation Cygnus. It is sometimes also called the Tulip Nebula because it appears to resemble the outline of a tulip when imaged photographically. It was catalogued by astronomer Stewart Sharpless in his 1959 catalog of nebulae. It lies at a distance of about 6,000 light-years (5.7×1016 km; 3.5×1016 mi) from Earth.

Sh2-101, at least in the field seen from earth, is in close proximity to microquasar Cygnus X-1, site of one of the first suspected black holes. Cygnus X-1 is the brighter of the two stars (lower star) in close vertical proximity just to the right of Sh2-101 in the image presented here.[2]

See also

References

  1. ^ http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Sh2-101&submit=SIMBAD+search
  2. ^ "Emission Nebula Sh2-101 and Cygnus X-1". doi:10.1086/173374.
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