HD 107914

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HD 107914
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Centaurus
CCDM J12242-3855A
Right ascension 12h 24m 13.0s[1]
Declination –38° 54′ 50″[1]
Apparent magnitude (V) 7.0[1]
CCDM J12242-3855B
Right ascension 12h 24m 13.2s[1]
Declination –38° 54′ 47″[1]
Apparent magnitude (V) 12.8[1]
Characteristics
Spectral type A7/8III[2]
B−V color index 0.272[3]
Astrometry
Proper motion (μ) RA: +0.55[4] mas/yr
Dec.: –0.02[4] mas/yr
Parallax (π) 12.77 ± 0.46 mas
Distance 255 ± 9 ly
(78 ± 3 pc)
Other designations
2MASS J12241294-3854498, CCDM J12242-3855AB, HIP 60503, HD 107914, TYC 7757-196-1

HD 107914 is a binary star in the constellation Centaurus, with an estimated distance of 255.5 light-years (78.3 pc)[5] from the Solar System. The primary 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.[5] 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.[6]) 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[edit]

  1. ^ a b c d e f "CCDM J12242-3855. Vizier detailed page.". Vizier. Centre de Données astronomiques de Strasbourg. Retrieved 2010-04-13. 
  2. ^ "CCDM J12242-3855AB. Double or multiple star.". SIMBAD. Centre de Données astronomiques de Strasbourg. Retrieved 2010-04-13. 
  3. ^ "HIP 60503. VizieR detailed page.". Vizier. Centre de Données astronomiques de Strasbourg. Retrieved 2010-04-13. 
  4. ^ a b "Detailed description of I/311.". Hipparcos. Centre de Données astronomiques de Strasbourg. Retrieved 2010-04-13. 
  5. ^ 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]. Bibcode 2010arXiv1003.5308P.
  6. ^ Eaton, J. A.; Williamson M. H. (2007). "The Tennessee State University Automatic Spectroscopic Telescope: Data Processing and Velocity Variation of Cool Giants". PASP 119: 886–897. Bibcode:2007PASP..119..886E. doi:10.1086/521231.