HD 50002

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HD 50002
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Volans
Right ascension 06h 44m 55.646s[1]
Declination −70° 26′ 01.53″[1]
Apparent magnitude (V) 6.09±0.01
Characteristics
Evolutionary stage orange giant
Spectral type K3III[2]
U−B color index 1.5
B−V color index 1.333
Astrometry
Radial velocity (Rv)5.97±0.19[1] km/s
Proper motion (μ) RA: 16.49±0.114[1] mas/yr
Dec.: 6.203±0.158[1] mas/yr
Parallax (π)4.6396 ± 0.0650[1] mas
Distance703 ± 10 ly
(216 ± 3 pc)
Absolute magnitude (MV)−0.1[citation needed]
Details
Radius27.56[3] R☉
Luminosity245.09[3] L☉
Surface gravity (log g)1.6[citation needed] cgs
Temperature4134[citation needed] K
Metallicity [Fe/H]-0.05[citation needed] dex
Rotational velocity (v sin i)<1[4] km/s
Other designations
HD 50002, CPD−70°560, GSC 09181-00417, HIC 32332, HIP 32332, HR 2536
Database references
SIMBADdata

HD 50002, also known as HR 2536, is a solitary star in the borders of Volans. With an apparent magnitude of 6.09,[5] it is impossible to see with the naked eye under urban skies, but might be visible in a location with very little light pollution. With a radial velocity of 5.97 km/s,[1] this star is drifting away from the Solar System, and is currently 703 light years away.[1]

Properties[]

This is a K3III star.[6] The "III" inside the spectrum indicates that this is a giant star that has exhausted hydrogen at its core. The "K3" suggest it is an early K-type star with a temperature of approximately 4313 K. It has a radius of 27 times that of the Sun, and is a luminous star, which is radiating at 245 solar luminosity.

Disk Population[]

This star was observed in a study in 1994, and was found to be a member of the disk population. It was surveyed as one of the stars outside the Sirius supercluster and the Hyades. During that, HD 50002 was observed to have a poor metallicity compared to other stars of the same age, with an index of less than 0.3. This is unlike the other young stars in the disk.[7]

Possible Exoplanets[]

In 2018, this star was observed by TESS. As of 2021, this star has no planets, and only observed the stellar parameters.[8]

References[]

  1. ^ Jump up to: a b c d e f g h Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051.
  2. ^ Sloan, G. C.; Herter, T. L.; Charmandaris, V.; Sheth, K.; Burgdorf, M.; Houck, J. R. (2015-01-01). "Spectral Calibration in the Mid-Infrared: Challenges and Solutions". The Astronomical Journal. 149 (1): 11. arXiv:1408.5922. Bibcode:2015AJ....149...11S. doi:10.1088/0004-6256/149/1/11. ISSN 0004-6256. S2CID 119166604.
  3. ^ Jump up to: a b Anderson, E.; Francis, Ch. (2012-05-01). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331–346. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. ISSN 1063-7737. S2CID 119257644.
  4. ^ De Medeiros, J. R.; Alves, S.; Udry, S.; Andersen, J.; Nordström, B.; Mayor, M. (2014-01-01). "A catalog of rotational and radial velocities for evolved stars. V. Southern stars". Astronomy and Astrophysics. 561: A126. arXiv:1312.3474. Bibcode:2014A&A...561A.126D. doi:10.1051/0004-6361/201220762. ISSN 0004-6361.
  5. ^ Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (2000-03-01). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H. ISSN 0004-6361.
  6. ^ Houk, Nancy (1975). Michigan catalogue of two-dimensional spectral types for the HD stars. 1. Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan. Bibcode:1975MSS...C01....0H.
  7. ^ Eggen, Olin J. (January 1989). "Large and kinematically unbiased samples of G- and K-type stars. II - Observations of evolved stars in the Bright Star sample. III - Evolved young disk stars in the Bright Star sample". Publications of the Astronomical Society of the Pacific. 101: 45. doi:10.1086/132403. ISSN 0004-6280.
  8. ^ Stassun, Keivan G.; Oelkers, Ryan J.; Paegert, Martin; Torres, Guillermo; Pepper, Joshua; De Lee, Nathan; Collins, Kevin; Latham, David W.; Muirhead, Philip S.; Chittidi, Jay; Rojas-Ayala, Bárbara (2019-10-01). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. Bibcode:2019AJ....158..138S. doi:10.3847/1538-3881/ab3467. hdl:1721.1/124721. ISSN 0004-6256. S2CID 166227927.
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