The Tulip Nebula
Sh2-101
Sharpless 101 (Sh2-101) is an emission nebula located in the constellation Cygnus. It is 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. The companion star of Cygnus X-1 is a spectral class O9.7 Iab supergiant with a mass of 21 solar masses and 20 times the radius of the Sun. The period of the binary system is 5.8 days and the pair is separated by 0.2 astronomical units. The black hole has a mass of 15 solar masses and a bowshock is created by a jet of energetic particles from the black hole as they interact with the interstellar medium.

The nebula is surrounded by lots of dust and gas.


Image Details
Date
September 3 & 6, 2021
LOCATion
Hannover (Germany)
Sky Quality
Bortle 5
Telescope
Celestron RASA 8 (203/400 f/2)
Mount
Skywatcher EQ6-R Pro
Main Camera
ZWO ASI 2600 MC Pro
Gain 100, Offset 18, -10°
Focuser
Celestron Motorfocus
Processing
Astropixelprocessor, Photoshop, Pixinsight
Filter
IDAS NBZ
Exposure
RGB (stars):60 × 30″(30′)
Ha & OIII: 60 x 240'' (4h)
Total: 4h 30'
Guiding
ZWO ASI 462 MC, PHD2
Calibration
Flats, Darks, Darkflats
Software
N.I.N.A., EQMod
Other
Artesky Filter Holder
  
  
Gallery
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Nebula
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Moon
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