Cetus III
| Cetus lll | |
|---|---|
| Observation data | |
| Constellation | Cetus |
| Distance | 818,652 ly |
| Group or cluster | Milky Way subgroup |
| Characteristics | |
| Type | Ultra-faint dwarf |
| Half-light radius (physical) | 90 |
Cetus lll is an ultra-faint dwarf galaxy (UFD) that is a satellite galaxy to the Milky Way. It is located at a distance of 251 kiloparsecs in the constellation of Cetus. It has a half-light radius of 90 parsecs.[1]
It was identified as a statistically significant overdensity of stars by the Subaru/Hyper Suprime-Cam Survey. It’s small size made it invisible to the Sloan Digital Sky Survey.[1]
References
- ^ a b Homma, Daisuke; Chiba, Masashi; Okamoto, Sakurako; Komiyama, Yutaka; Tanaka, Masayuki; Tanaka, Mikito; Ishigaki, Miho N.; Hayashi, Kohei; Arimoto, Nobuo; Garmilla, José A.; Lupton, Robert H.; Strauss, Michael A.; Miyazaki, Satoshi; Wang, Shiang-Yu; Murayama, Hitoshi (January 2018). "Searches for new Milky Way satellites from the first two years of data of the Subaru/Hyper Suprime-Cam survey: Discovery of Cetus III". Publications of the Astronomical Society of Japan. 70: S18. arXiv:1704.05977. doi:10.1093/pasj/psx050. ISSN 0004-6264.