HD 135944

HD 135944 is a star in the northern constellation of Boötes. With an apparent magnitude of 6.5,[2] it is at the limits of naked eye visibility. There is a magnitude 8.94 companion at an angular separation of 67.3″ along a position angle of 102° (as of 2011).[5]

HD 135944
Observation data
Epoch J2000      Equinox J2000
Constellation Boötes
Right ascension 15h 15m 50.706s[1]
Declination +50° 56′ 18.45″[1]
Apparent magnitude (V) 6.48[2]
Characteristics
Spectral type G5[3]
B−V color index +0.845[4]
Astrometry
Radial velocity (Rv)+10.05[4] km/s
Proper motion (μ) RA: +24.95±0.31[1] mas/yr
Dec.: −45.53±0.32[1] mas/yr
Parallax (π)16.17 ± 0.31[1] mas
Distance202 ± 4 ly
(62 ± 1 pc)
Details
Radius4[4] R☉
Luminosity8.1[4] L☉
Surface gravity (log g)3.5[4] cgs
Temperature5,058[4] K
Rotational velocity (v sin i)0.0[4] km/s
Other designations
BD+51° 1990, HD 135944, HIP 74690, SAO 29464.[3]
Database references
SIMBADdata

References
  1. van Leeuwen, F. (November 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. Oja, T. (March 1985), "UBV photometry of stars whose positions are accurately known. II", Astronomy and Astrophysics Supplement Series, 59: 461–464, Bibcode:1985A&AS...59..461O
  3. HD 135944, SIMBAD Astronomical Database, retrieved 2013-01-31.
  4. Massarotti, Alessandro; et al. (January 2008), "Rotational and radial velocities for a sample of 761 HIPPARCOS giants and the role of binarity", The Astronomical Journal, 135 (1): 209–231, Bibcode:2008AJ....135..209M, doi:10.1088/0004-6256/135/1/209.
  5. Mason, B. D.; et al. (2014), "The Washington Visual Double Star Catalog", The Astronomical Journal, 122: 3466–3471, Bibcode:2001AJ....122.3466M, doi:10.1086/323920, retrieved 2015-07-22
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