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]
| 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 mas[1] |
| Distance | 202 ± 4 ly (62 ± 1 pc) |
| Details | |
| Radius | 4[4] R☉ |
| Luminosity | 8.1[4] L☉ |
| Surface gravity (log g) | 3.5[4] cgs |
| Temperature | 5,058[4] K |
| Rotational velocity (v sin i) | 0.0[4] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
References edit
- ^ a b c d e 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, S2CID 18759600.
- ^ a b 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
- ^ a b HD 135944, SIMBAD Astronomical Database, retrieved 2013-01-31.
- ^ a b c d e f g 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.
- ^ Mason, B. D.; et al. (2014), "The Washington Visual Double Star Catalog", The Astronomical Journal, 122 (6): 3466–3471, Bibcode:2001AJ....122.3466M, doi:10.1086/323920, retrieved 2015-07-22
External links edit
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