HD 50281

HD 50281
Observation data
Epoch J2000      Equinox J2000
Constellation Monoceros
Right ascension 06h 52m 18.05s[1]
Declination −05° 10′ 25.4″[1]
Apparent magnitude (V) 6.57/10.08
Characteristics
Spectral type K3 V/M2.5 V
U−B color index 0.95/1.21
B−V color index 1.06/1.47
Variable type None
Astrometry
Radial velocity (Rv)-10.3 km/s
Proper motion (μ) RA: -544.14 ± 0.44[1] mas/yr
Dec.: -3.32 ± 0.34[1] mas/yr
Parallax (π)114.81 ± 0.44[1] mas
Distance28.4 ± 0.1 ly
(8.71 ± 0.03 pc)
Absolute magnitude (MV)6.87[2]
Details
Mass0.80/0.50 M☉
Radius0.67/0.10 R☉
Luminosity0.15/0.00058 L☉
Temperature4,712 ± 8.5[3] / 3900 K
Metallicity [Fe/H]+0.01 ± 0.17[4] dex
Other designations
88 G. Monocerotis, BD -05°1844, GCTP 1606.00, GJ 250, HD 50281, HIP 32984, LFT 494, LHS 1875, LTT 2662, SAO 133805.
Database references
SIMBADdata

HD 50281 (also known as Gliese 250) is a binary star system with a relatively high proper motion. The primary star is a main sequence orange dwarf star, while the smaller companion is a red dwarf. The two stars are separated by 58 arcsecs, which, at the estimated distance, is equivalent to about 500 AUs.

See also

References

  1. 1 2 3 4 5 van Leeuwen, F. (2007). "HIP 32984". Hipparcos, the New Reduction. Retrieved 2009-12-17.
  2. ↑ Holmberg, J.; et al. (July 2009), "The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics", Astronomy and Astrophysics, 501 (3): 941–947, Bibcode:2009A&A...501..941H, arXiv:0811.3982 Freely accessible, doi:10.1051/0004-6361/200811191.
  3. ↑ Kovtyukh; et al. (2003). "High precision effective temperatures for 181 F-K dwarfs from line-depth ratios". Astronomy and Astrophysics. 411 (3): 559–564. Bibcode:2003A&A...411..559K. arXiv:astro-ph/0308429 Freely accessible. doi:10.1051/0004-6361:20031378.
  4. ↑ Rojas-Ayala, Bárbara; et al. (April 2012). "Metallicity and Temperature Indicators in M Dwarf K-band Spectra: Testing New and Updated Calibrations with Observations of 133 Solar Neighborhood M Dwarfs". The Astrophysical Journal. 748 (2): 93. Bibcode:2012ApJ...748...93R. arXiv:1112.4567 Freely accessible. doi:10.1088/0004-637X/748/2/93.
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