SN 1917A is a type II supernova that erupted in the galaxy NGC 6946 , which is located in the constellation Cygnus . The discovery was made on July 19, 1917 by the American astronomer George Willis Ritchie . The maximum brightness of the supernova was 13.6 visible magnitude. [1] SN 1917A is located at 37 "W and 105" S with respect to the nucleus of the host galaxy. The distance to it is approximately 22 million light years.
| SN 1917A | |
|---|---|
 The parent galaxy where the supernova explosion occurred. | |
| Observational data ( Age J2000.0) | |
| Supernova type | II |
| Galaxy | NGC 6946 |
| Constellation | Swan |
| Right ascension | |
| Declination | |
| Galactic coordinates | 095.6880 +11.6653 |
| opening date | July 19, 1917 |
| Maximum Shine (V) | 13.6 [1] |
| Distance | 22 million St. years old |
| physical characteristics | |
As of May 2017, 10 supernova explosions were detected in the galaxy NGC 6946.
See also
- NGC 6946
- N6946-BH1
Notes
- ↑ 1 2 R. Barbon, V. Buondi ', E. Cappellaro, M. Turatto. The Asiago Supernova Catalog - 10 years after . Arxiv.org (5 Aug 1999). Date of treatment May 29, 2017.