Tulip Nebula

Tulip Nebula
emission nebula
H II region
Tulip Nebula(Sh2-101)
Credit: Hunter Wilson
Observation data: J2000.0 epoch
Right ascension 20h 00m 29.37s
Declination 35° 19′ 13.9″
Distance 6,000 ly   (1,800 pc)
Apparent magnitude (V) 9.0
Apparent dimensions (V) 16' x 9'
Constellation Cygnus
Designations Sharpless 101, Sh2-101, Cygnus Star Cloud

The Tulip Nebula, or Sharpless 101 (Sh2-101) or the Cygnus Star Cloud is a H II region[1] emission nebula located in the constellation Cygnus. It is so named 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.

The Tulip nebula, 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 the Tulip nebula in the image presented here.[2]

See also


  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. 

External links

  • Sharpless Catalog