Pegasus V
Coordinates: 
23h 18m 27.8s, +33° 21′ 32″
| Pegasus V/Andromeda XXXIV | |
|---|---|
_(noirlab2214b).jpg) Gemini Observatory photograph of Pegasus V/Andromeda XXXIV, circled in yellow. | |
| Observation data | |
| Constellation | Andromeda |
| Right ascension | 23h 18m 27.8s[1] |
| Declination | +33° 21′ 32″[1] |
| Distance | 692 kpc (2.26 Mly)[1] |
| Apparent magnitude (V) | 00.0 ± 0[1] |
| Absolute magnitude (V) | -6.3 ± 0.2[1] |
| Characteristics | |
| Mass | (0.0±0.0)×100[1] M☉ |
| Half-light radius (physical) | 87+40 −54 |
| Half-light radius (apparent) | 0.44+0.2 −0.1 |
Pegasus V (Peg V), or Andromeda XXXIV (And XXXIV), is an ultra-faint dwarf galaxy and a minor satellite of the Andromeda Galaxy, located in the Andromeda constellation and discovered by the amateur astronomer Giuseppe Donatiello in 2022.[1]
Discovery
Pegasus V was first identified by the Italian amateur astronomer Giuseppe Donatiello in 2022 as an unresolved over density of stars in the Andromeda constellation whilst he was analyzing the DESI Legacy Imaging Survey, conducted by the M4 Telescope;[2] it was confirmed in April 2022 after further observations by the Gemini Observatory.[1]
Nomenclature
The galaxy's two names are derived from its location in the night sky, with Andromeda XXXIV referring to both its location in the namesake constellation of Andromeda and its status as a satellite to the Andromeda Galaxy.[1]
Characteristics
Pegasus V is an ultra-faint dwarf galaxy, with a very high apparent magnitude relative to Andromeda's other satellite galaxies, such as Messier 33 or Messier 101.[1]
See also
- Andromeda Galaxy
- Giuseppe Donatiello
- List of Andromeda's satellite galaxies
- Messier 32
- Messier 110
- Ultra faint dwarf galaxy
References
- ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 Collins, Michelle L M.; Charles, Emily J E.; Martínez-Delgado, David; Monelli, Matteo; Karim, Noushin; Donatiello, Giuseppe; Tollerud, Erik J.; Boschin, Walter (2022). "Pegasus V/Andromeda XXXIV–a newly discovered ultrafaint dwarf galaxy on the outskirts of Andromeda". Monthly Notices of the Royal Astronomical Society: Letters. 515 (1): L72–L77. arXiv:2204.09068. Bibcode:2022MNRAS.515L..72C. doi:10.1093/mnrasl/slac063. Retrieved 2024-06-01.
- ↑ "Image Detail". Gemini Observatory. Retrieved 2026-05-26.
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