U Antliae

U Antliae
Observation data
Epoch J2000      Equinox J2000
Constellation Antlia
Right ascension 10h 35m 12.852s[1]
Declination −39° 33′ 45.32″[1]
Apparent magnitude (V) 5.505
Characteristics
Spectral type N:v
U−B color index 7.1
B−V color index 2.88
Variable type LB
Astrometry
Radial velocity (Rv)37 km/s
Proper motion (μ) RA: −31.02 ± 0.56[1] mas/yr
Dec.: 3.50 ± 0.53[1] mas/yr
Parallax (π)3.73 ± 0.54[1] mas
Distanceapprox. 900 ly
(approx. 270 pc)
Absolute magnitude (MV)−5.22[2]
Details
Mass1.04 M☉
Radius350 R☉
Luminosity5819[3] L☉
Temperature3317[3] K
Age? years
Other designations
HR 4153, CD-38 6579, 2MASS J10351285-3933453, HD 91793, PPM 287864, AAVSO 1030-39, HIP 51821, SAO 201533.
Database references
SIMBADdata

Coordinates: 10h 35m 12.8507s, −39° 33′ 45.319″

U Antliae (U Ant) is a star in the constellation Antlia.

U Antliae is a red C-type carbon star and is an irregular variable star that varies between magnitudes 5.27 and 6.04.[4] Approximately 900 light years from Earth, it shines with a luminosity approximately 5819 times that of the Sun and has a surface temperature of 3317 K.[3] It is surrounded by two shells of dust, thought to have been ejected 14,000 and 10,000 years ago.[5]

References

  1. 1 2 3 4 5 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752Freely accessible. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.Vizier catalog entry
  2. ↑ Guandalini, R.; Cristallo, S. (2013). "Luminosities of carbon-rich asymptotic giant branch stars in the Milky Way". Astronomy & Astrophysics. 555: 7. arXiv:1305.4203Freely accessible. Bibcode:2013A&A...555A.120G. doi:10.1051/0004-6361/201321225. A120.
  3. 1 2 3 McDonald, I.; Zijlstra, A. A.; Boyer, M. L. (2012). "Fundamental Parameters and Infrared Excesses of Hipparcos Stars". Monthly Notices of the Royal Astronomical Society. 427 (1): 343–57. arXiv:1208.2037Freely accessible. Bibcode:2012MNRAS.427..343M. doi:10.1111/j.1365-2966.2012.21873.x.
  4. ↑ Otero, Sebastian (3 November 2011). "U Antliae". AAVSO Website. American Association of Variable Star Observers. Retrieved 25 July 2014.
  5. ↑ Izumiura, H.; Waters, L. B. F. M.; de Jong, T.; Loup, C.; Bontekoe, Tj. R.; Kester, D. J. M. (1997). "A double dust shell surrounding the carbon star U Antliae". Astronomy and Astrophysics. 323: 449–60. Bibcode:1997A&A...323..449I.


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