Contact information

Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki

Ursa Astronomical Association

Sh2-101 Tulppaanisumu and Cygnus X-1 - 3.10.2016 at 21.06 Oulu Observation number 57592

Visibility II / V

Jaakko Asikainen, Oulun Arktos

The dry season of a couple of weeks ended just right with the moon renewing itself into the invisible. My first company from the Sharpless catalog, Tulipaanisumu Joutsenen Sirppisumu, ended up as a target.

Near the site is a powerful source of radio radiation detected in the 60s, Cygnus X-1. It is an Iab-type super giant HDE 226868 orbiting a black hole with a mass of a dozen suns and a rotation time of 5.6 days. I marked it with a picture box.

More information:

Directions Cygnus X-1 creates with Space Engine:

More similar observations
Additional information
  • Observation target
    • Deep space object
  • Designation
    • Sh2-101 Tulppaanisumu ja Cygnus X-1
    • Heikosti näkyvä
  • Constellation
    • Cygnus
  • Field of view
  • 0.6 degrees
  • Darkness
    • Average
  • Seeing
    • Mediocre
  • Nebulae
    • Emission nebula info

      In an emission nebula the hot stars nearby cause the gas glow. This should not mix with reflection nebula, where the gas is only lit up by nearby stars.

      The appearance of a gas nebula is irregular, and the fainter parts of it need bigger instruments to be visible.


      Emssion nebulae in Cepheus. The bigger part is composed of the nebulae Cederblad 214 (Ced214) and NGC 7822. The lower round nebula is called Sharpless 170 (Sh2-170). Image J-P Metsävainio.


      The Orion nebula. Image Samuli Vuorinen.


      In this 4-degree-field there are emission nebulae Sh2-157, Sh2-158, Sh2-159, Sh2-161 and Sh2-162 (or NGC 7635 aka Bubble Nebula) and open clusters M52 and NGC 7510. Image Juha Kepsu.


      NGC 281 aka Pacman Nebula. The object is in Cassiopeia. Image J-P Metsävainio.


      NGC 896 in Cassiopeia is the tip of Heart Nebula (IC 1805). Image Timo Inkinen.

Technical information

SW200P, NEQ6 Pro, QHY9m, Baader LRGB filters. 25x5min L + 10x5min RGB

Comments: 1 pcs
Kari Kauppinen - 7.10.2016 at 05.18 Report this

Hyvä kuva ja havaintokertomus.

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