HD 31093

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HD 31093
Observation data
Epoch J2000      Equinox J2000
Constellation Caelum
Right ascension 04h 51m 28.21644s[1]
Declination −34° 54′ 22.6341″[1]
Apparent magnitude (V) 5.85[2]
Characteristics
Spectral type A1V + A4V[3]
U−B color index +0.09[2]
B−V color index +0.08[2]
Astrometry
Radial velocity (Rv)+23[4] km/s
Proper motion (μ) RA: 24.90±0.33[1] mas/yr
Dec.: −22.68±0.48[1] mas/yr
Parallax (π)12.17 ± 0.41[1] mas
Distance268 ± 9 ly
(82 ± 3 pc)
Orbit[5]
PrimaryHD 31093A
CompanionHD 31093B
Period (P)43.36 yr
Semi-major axis (a)0.248"
(20.336 AU)
Eccentricity (e)0.852
Details
HD 31093 A
Mass2.7[3] M☉
Radius2.47[6] R☉
Luminosity26.95(each)[7] L☉
Surface gravity (log g)3.96[6] cgs
Temperature8629[8] K
Rotational velocity (v sin i)196.8±1.9[9] km/s
HD 31093 B
Mass2.3[3] M☉
Other designations
CD–35° 1962, FK5 2364, HD 31093, HIP 22573, HR 1559, SAO 195357.[10]
Database references
SIMBADdata

HD 31093 (also known as HIP 22573)[11] is a binary star system in the constellation Caelum. With a radial velocity of 23 km/s, it's drifting away from the Solar System. HD 31093 is roughly 268 light years distant based on parallax.[3]

Properties[]

Orbit[]

This pair has a separation of 24.8 mas, which corresponds to a projected separation of 20.336 AU. Both stars have a period of 43.36 years, and has an eccentricity of 0.852.

Physical Properties[]

The primary star has 2.7 times the mass of the Sun. Both stars are radiating at 26.95 times the luminosity of the latter, which corresponds to an effective temperature of 8629 K. HD 31093 has twice the radius of the Sun, and has a weaker gravity than the Sun.

References[]

  1. ^ a b c d e van Leeuwen, F. (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. S2CID 18759600. Vizier catalog entry
  2. ^ a b c Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data, SIMBAD, Bibcode:1986EgUBV........0M
  3. ^ a b c d Docobo, J. A.; Andrade, M. (2013). "Dynamical and physical properties of 22 binaries discovered by W. S. Finsen". Monthly Notices of the Royal Astronomical Society. 428 (1): 321–339. Bibcode:2013MNRAS.428..321D. doi:10.1093/mnras/sts045.
  4. ^ Kharchenko, N. V.; Scholz, R.-D.; Piskunov, A. E.; Röser, S.; Schilbach, E. (2007). "Astrophysical supplements to the ASCC-2.5: Ia. Radial velocities of ˜55000 stars and mean radial velocities of 516 Galactic open clusters and associations". Astronomische Nachrichten. 328 (9): 889. arXiv:0705.0878. Bibcode:2007AN....328..889K. doi:10.1002/asna.200710776. S2CID 119323941.
  5. ^ Malkov, O. Yu.; Tamazian, V. S.; Docobo, J. A.; Chulkov, D. A. (2012-10-01). "Dynamical masses of a selected sample of orbital binaries". Astronomy and Astrophysics. 546: A69. Bibcode:2012A&A...546A..69M. doi:10.1051/0004-6361/201219774. ISSN 0004-6361.
  6. ^ a b Stassun, Keivan G.; Oelkers, Ryan J.; Pepper, Joshua; Paegert, Martin; De Lee, Nathan; Torres, Guillermo; Latham, David W.; Charpinet, Stéphane; Dressing, Courtney D.; Huber, Daniel; Kane, Stephen R. (2018-09-01). "The TESS Input Catalog and Candidate Target List". The Astronomical Journal. 156 (3): 102. arXiv:1706.00495. Bibcode:2018AJ....156..102S. doi:10.3847/1538-3881/aad050. hdl:2144/32922. ISSN 0004-6256. S2CID 73582386.
  7. ^ 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.
  8. ^ Gaia Collaboration; Brown, A. G. A.; Vallenari, A.; Prusti, T.; de Bruijne, J. H. J.; Babusiaux, C.; Bailer-Jones, C. A. L.; Biermann, M.; Evans, D. W.; Eyer, L.; Jansen, F. (2018-08-01). "Gaia Data Release 2. Summary of the contents and survey properties". Astronomy and Astrophysics. 616: A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. ISSN 0004-6361.
  9. ^ Díaz, C. G.; et al. (July 2011), "Accurate stellar rotational velocities using the Fourier transform of the cross correlation maximum", Astronomy & Astrophysics, 531: A143, arXiv:1012.4858, Bibcode:2011A&A...531A.143D, doi:10.1051/0004-6361/201016386, S2CID 119286673
  10. ^ "HD 31093 -- Double or multiple star". SIMBAD Astronomical Database. Centre de données astronomiques de Strasbourg. Retrieved 2014-12-26.
  11. ^ "HD 31093, a white main-sequence star in Caelum". www.astrostudio.org. Archived from the original on 2015-04-10. Retrieved 2015-04-05.

External links[]

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