Sh2-101 Tulip Nebula and Cygnus X-1

Sh2-101 Tulip Nebula LRHaGB | Avogadro Observatory
Sh2-101 Tulip Nebula LRGB | Avogadro Observatory
Cygnus X-1 Black Hole (?) and Sh2-101 Tulip Nebula L | Avogadro Observatory
Object Type: 

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. 

Full-Res Image

Image Calibration 

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
Radius: 0.396 deg
Pixel scale: 0.947 arcsec/pixel
Orientation: Up is -179 degrees E of N



Distance ~6.000 ly  
Visual Brightness +9
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)