UGC 3855
| UGC 3855 | |
|---|---|
 UGC 3855 and a foreground star imaged by the Hubble Space Telescope | |
| Observation data (J2000 epoch) | |
| Constellation | Lynx |
| Right ascension | 07h 28m 12.8469s[1] |
| Declination | +58° 30′ 22.881″[1] |
| Redshift | 0.010564±0.0000270[1] |
| Heliocentric radial velocity | 3,167±8 km/s[1] |
| Distance | 130.95 ± 11.37 Mly (40.150 ± 3.486 Mpc)[1] |
| Characteristics | |
| Type | Sab[1] |
| Size | ~93,200 ly (28.59 kpc) (estimated)[1] |
| Other designations | |
| IRAS F07239+5836, 2MASX J07281299+5830242, MCG +10-11-052, PGC 21067, CGCG 286-020[1] | |
UGC 3855, also known as PGC 21067 or sometimes as the Modest galaxy, is a spiral galaxy in the constellation of Lynx.[2][3] Its velocity with respect to the cosmic microwave background is 3,236±9 km/s,[1] which corresponds to a Hubble distance of 155.7 ± 10.9 Mly (47.73 ± 3.35 Mpc). However, 4 non-redshift measurements give a closer mean distance of 130.95 ± 11.37 Mly (40.150 ± 3.486 Mpc).[4] The first known reference to this galaxy comes from Part 1 of the Morphological Catalogue of Galaxies, published in 1962, where it is listed as MCG +10-11-052.[5]
It is a relatively old galaxy with a stellar population around 10.6 billion years old. It also has a low rate of star formation of about 0.2 solar masses per year.[6]
Supernova
[edit]One supernova has been observed in UGC 3855: SN 2021agco (Type Ib, mag. 17.6) was discovered by the Xingming Observatory Sky Survey (XOSS) on 5 December 2021.[7] It is the closest ultra-stripped supernova yet discovered.[6]
References
[edit]- ^ a b c d e f g h i "Results for object UGC 03855". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 20 April 2026.
- ^ information@eso.org. "The Modest Galaxy". www.esahubble.org. Retrieved 14 November 2025.
- ^ Ford, Dominic. "UGC 3855 (Galaxy)". In-The-Sky.org. Retrieved 14 November 2025.
- ^ "Distance Results for UGC 03855". NASA/IPAC Extragalactic Database. NASA. Retrieved 20 April 2026.
- ^ Vorontsov-Vel'Yaminov, B. A.; Arkhipova, V. P. (1962). "Morphological catalogue of galaxies. Part 1". Morphological Catalogue of Galaxies. C01. Bibcode:1962MCG...C01....0V.
- ^ a b Yan, Shengyu; Wang, Xiaofeng; Gao, Xing; Zhang, Jujia; Filippenko, Alexei V.; Brink, Thomas G.; Mo, Jun; Lin, Weili; Xiang, Danfeng; Ma, Xiaoran; Guo, Fangzhou; Tomasella, Lina; Benetti, Stefano; Cai, Yongzhi; Cappellaro, Enrico (1 December 2023). "Discovery of the Closest Ultra-stripped Supernova: SN 2021agco in UGC 3855". The Astrophysical Journal Letters. 959 (2): L32. arXiv:2310.04827. Bibcode:2023ApJ...959L..32Y. doi:10.3847/2041-8213/ad0cc3. ISSN 2041-8205.
- ^ "SN 2021agco". Transient Name Server. IAU. Retrieved 20 April 2026.
External links
[edit]
Media related to UGC 3855 at Wikimedia Commons- UGC 3855 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
