UDF 2457

UDF 2457 is the Hubble Ultra Deep Field (UDF) identifier for a red dwarf star calculated to be about 59,000 light-years (18 kiloparsecs) from Earth^[2] with a very dim apparent magnitude of 25.^[1]

UDF 2457

Red dwarf star UDF 2457 as seen by the Hubble Ultra Deep Field (UDF) Credit: STScI, NASA, ESA
Observation data Epoch J2000      Equinox J2000
Constellation	Fornax[1]
Right ascension	03h 32m 38.79s[1]
Declination	−27° 48′ 10.0″[1]
Apparent magnitude (V)	25[1]
Characteristics
Spectral type	(early?) M dwarf[2]
Astrometry
Distance	59,000[2] ly
Details
Database references
SIMBAD	data
UDF 2457 is located above the spiral galaxy UDF 423 in the lower right quadrant of the Hubble Ultra Deep Field.

The Milky Way galaxy is about 100,000 light-years in diameter,^[3] and the Sun is about 25,000 light-years from the Galactic Center.^[4] The small common star UDF 2457 may be one of the farthest known stars inside the main body of the Milky Way. Globular clusters (such as Messier 54 and NGC 2419) and stellar streams are located farther out in the galactic halo.^{[needs update?]}

See also

• UDFj-39546284 – farthest galaxy seen by the Hubble Ultra-Deep Field

References

1. "UDF 2457". Wikisky. Retrieved 2010-10-28.
2. Sangeeta Malhotra. "As far as the Hubble can see" (PDF). Arizona State University. Retrieved 2010-10-28.
3. Christian, Eric; Safi-Harbr, Samar (1998-03-17). "How large is the Milky Way?". NASA: Ask an Astrophysicist. Retrieved 2007-11-28.
4. Gillessen, S.; Eisenhauer; Trippe; Alexander; Genzel; Martins; Ott (2009). "Monitoring Stellar Orbits Around the Massive Black Hole in the Galactic Center". The Astrophysical Journal. 692 (2): 1075–1109. arXiv:0810.4674. Bibcode:2009ApJ...692.1075G. doi:10.1088/0004-637X/692/2/1075. S2CID 1431308.