Sh2-101 Tulip Nebula and Cygnus X-1
Sh2-101 Tulip Nebula LRGB and LRHaGB: stack 10 hrs (L 24x600" and 13x300" each RGB - Ha 18x900s) calibrated and stacked and processed in Pixinsight and CS5.
|Center (RA, Dec):||(300.005, 35.320)|
|Center (RA, hms):||20h 00m 01.241s|
|Center (Dec, dms):||+35° 19' 13.799"|
|Size:||37.2 x 29.5 arcmin|
|Pixel scale:||0.947 arcsec/pixel|
|Orientation:||Up is -179 degrees E of N|
|Apparent Dimension||16' x 9'|
Sharpless 101 (Sh2-101) is a H II region 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 left of Sh2-101 in the image (L-b/w).(source wikipedia)