HD 107914

HD 107914
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Centaurus
Right ascension 12h 24m 12.93679s[1]
Declination −38° 54′ 49.7344″[1]
Apparent magnitude (V) 6.87±0.01[2]
Characteristics
Evolutionary stage main sequence[1]
Spectral type A7/8 III[3]
B−V color index +0.28[2]
Astrometry
Proper motion (μ) RA: +0.085 mas/yr[1]
Dec.: +0.966 mas/yr[1]
Parallax (π)12.5254 ± 0.0221 mas[1]
Distance260.4 ± 0.5 ly
(79.8 ± 0.1 pc)
Absolute magnitude (MV)+2.41[4]
Details[1]
Mass1.6 M☉
Radius1.9 R☉
Luminosity8.9 L☉
Surface gravity (log g)4.01 cgs
Temperature7,261 K
Metallicity [Fe/H]−0.62 dex
Age1.2 Gyr
Other designations
CCDM J12242-3855AB, CD−38°7710, HIP 60503, HD 107914, SAO 203431[5]
Database references
SIMBADdata

HD 107914 is the primary component of a binary star system in the constellation Centaurus, with an estimated distance of 255.5 light-years (78.3 pc)[6] from the Solar System. It has a stellar classification of A7-8 III, making it a giant star.

Measurement of the proper motion of this system show that it has a low transverse velocity relative to the Sun. For this reason, it has been compared to the hypothetical "Nemesis" star since it may pass through the Oort cloud in the future.[6] The star is too far away to be a companion to the Sun. However, preliminary measurements of the H-alpha line in the star's spectrum show a radial velocity in the range from –13 to +3 km/s. (This result was obtained by M. Muterspaugh and M. Williamson at a robotic spectroscopic telescope in Arizona.[7]) Such values for the radial velocity are too small to produce a likely collision course with the Solar System. For example, if Vr = –10 km/s, then the distance from the Sun to HD 107914 at closest approach will be about 5.2 ly (1.6 pc).

References

  1. ^ a b c d e f Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
  2. ^ a b Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (March 2000). "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.
  3. ^ Houk, N. (1982). Michigan Catalogue of Two-dimensional Spectral Types for the HD stars III: Declinations −40° to −26°. Bibcode:1982mcts.book.....H.
  4. ^ Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331–346. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. eISSN 1562-6873. ISSN 1063-7737. S2CID 119257644.
  5. ^ "CCDM J12242-3855AB". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2010-04-13.
  6. ^ a b Potemine, Igor Yu. (2010-04-13). "Giant Nemesis candidate HD 107914 / HIP 60503 for the perforation of Oort cloud". arXiv:1003.5308 [astro-ph.SR].
  7. ^ Eaton, J. A.; Williamson M. H. (2007). "The Tennessee State University Automatic Spectroscopic Telescope: Data Processing and Velocity Variation of Cool Giants". Publications of the Astronomical Society of the Pacific. 119 (858): 886–897. Bibcode:2007PASP..119..886E. doi:10.1086/521231. S2CID 6497781.