- Description: Emission Nebula Sh2-101 in Cygnus. Located a couple of degrees SW of the Crescent Nebula. Back
in 1962, a strong X-ray source was identified in Cygnus. The star labelled above with the mouseover (9th Mag. HDE 226868)
was identified by Tom Bolton, using the 74 inch telescope at the David Dunlop Observatory, as a black hole candidate and
the source of the X-ray emissions. Cygnus X-1 is a binary system, with the black hole orbiting HDE 226868. It is believed
to be between 7 and 13 solar masses with an orbital period of 5.6 days. More information on Cygnus X-1 can be found
here or at
Wikipedia. More on Tom Bolton's involvement is available here.
- Camera: SBIG ST-8XE at -15C
- Filter: Schuler 10nm Hydrogen Alpha
- Scope: Takahashi FSQ-106N
- Exposure: 2 x 30 minutes
- Location: Mt. Kobau B.C.
- Date: August 5, 2005