NGC 281 (other designations - IC 11 , LBN 616 ) is an emission nebula in the constellation Cassiopeia . It is a region of ionized hydrogen where active star formation processes take place.
| NGC 281 | |
|---|---|
| emission nebula | |
 | |
| Research history | |
| Discoverer | Edward Emerson Barnard |
| opening date | November 16, 1881 |
| Designations | NGC 281 , IC 11 , LBN 616 |
| Observational data ( Age J2000.0 ) | |
| Right ascension | |
| Declination | |
| Distance | and |
| Visible magnitude (V) | |
| Visible Dimensions (V) | 35.0 '× 30.0' |
| Constellation | Cassiopeia |
| physical characteristics | |
| Spectral class | |
| Radius | |
NGC 281
This object is one of those listed in the original edition of the New General Catalog .
It is located at a distance of about 10 thousand light-years from Earth. For the shape of the nebula, it was called the Pac-Man Nebula (Pac-Man) in honor of the character of the eponymous arcade computer game [1] . It is an area of active star formation. The nebula fluoresces with red light under the influence of ultraviolet radiation, the source of which is the hot young stars of the open cluster IC 1590 . Dark dust structures are also present in the nebula [2] .
See also
- List of Messier objects
- New shared directory
Links
- Information in English and French from the original “ New General Catalog ”
- Information (Eng.) From the Revised New General Catalog
- SIMBAD
- VizieR (English)
- NASA / IPAC Extragalactic Database
- List of NGC 281 publications
Notes
- ↑ Foster T., Brunt CM A CGPS look at the spiral structure of the outer Milky Way. I. Distances and velocities to star-forming regions // Astron. J. / J. G. III - IOP Publishing , 2015 .-- Vol. 150. - P. 147. - ISSN 0004-6256 ; 1538-3881 - doi: 10.1088 / 0004-6256 / 150/5/147
- ↑ Powell R. Open Clusters
- ↑ SIMBAD Astronomical Database
- ↑ Seligman C. New General Catalog Objects: NGC 250 - 299