HD 30963

HD 30963
Observation data
Epoch J2000      Equinox J2000
Constellation Eridanus
Right ascension 04h 51m 39.2471s[1]
Declination −10° 17′ 25.213″[1]
Apparent magnitude (V) 7.23[2]
Characteristics
Spectral type B9 HgMn[3]
Astrometry
Radial velocity (Rv)−7.2[4] km/s
Proper motion (μ) RA: −6.32[1] mas/yr
Dec.: −2.95[1] mas/yr
Parallax (π)3.52 ± 0.35[1] mas
Distance930 ± 90 ly
(280 ± 30 pc)
Details
Mass2.90 ± 0.17[5] M☉
Luminosity84.3[5] L☉
Surface gravity (log g)3.664 ± 0.031[4] cgs
Temperature11476 ± 150[4] K
Rotational velocity (v sin i)24 ± 12 km/s
Other designations
BD−10° 1028, HD 30963, HIP 22588, SAO 149937
Database references
SIMBADdata

HD 30963 is a star in the constellation of Eridanus. With an apparent magnitude of 7.23,[2] it cannot be seen with the naked eye. Parallax measurements made by Hipparcos put the star at a distance of around 900 light-years (280 parsecs) away.[1]

HD 30963 is a late B-type star.[3] It is a mercury-manganese star,[3] a class of chemically peculiar star that has an overabundance of certain elements like mercury. HD 30963 has 150,000 times as much mercury, 2,500 times as much platinum, 1,000 times as much yttrium, and 150 times as much zirconium compared to the Sun.[3] It has a mass of 2.90 M☉,[5] and its surface temperature is about 11,500 K.[4]

HD 30963 is close to the orbit that the solar system is traversing in the Milky Way. The sun will be close to the current location of HD 30963 in about 18.5 million years. Interstellar absorption lines for Na I are present for velocities lower than 10 km/s.[6]

References

  1. 1 2 3 4 5 6 van Leeuwen, F.; et al. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.
  2. 1 2 Høg, E.; et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H.
  3. 1 2 3 4 Monier, R.; Gebran, M.; Royer, F. (2016). "HD 30963: a new HgMn star". SF2A-2016: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics: 213–216. arXiv:1609.03542. Bibcode:2016sf2a.conf..213M.
  4. 1 2 3 4 Huang, Wenjin; Gies, D. R.; McSwain, M. V. (2010). "A Stellar Rotation Census of B Stars: From ZAMS to TAMS". The Astrophysical Journal. 722 (1): 605–619. arXiv:1008.1761. Bibcode:2010ApJ...722..605H. doi:10.1088/0004-637X/722/1/605.
  5. 1 2 3 Zorec, J.; Royer, F. (2012). "Rotational velocities of A-type stars. IV. Evolution of rotational velocities". Astronomy & Astrophysics. 537: A120. arXiv:1201.2052. Bibcode:2012A&A...537A.120Z. doi:10.1051/0004-6361/201117691.
  6. ↑ Wyman, Katherine; Redfield, Seth (2013). "Probing Our Heliospheric History. I. High-resolution Observations of Na I and Ca II along the Solar Historical Trajectory". The Astrophysical Journal. 773 (2): 96. arXiv:1307.2899. Bibcode:2013ApJ...773...96W. doi:10.1088/0004-637X/773/2/96.


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