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 |
Distance | 28.4 ± 0.1 ly (8.71 ± 0.03 pc) |
Absolute magnitude (MV) | 6.87[2] |
Details | |
Mass | 0.80/0.50 M☉ |
Radius | 0.67/0.10 R☉ |
Luminosity | 0.15/0.00058 L☉ |
Temperature | 4,712 ± 8.5[3] / 3900 K |
Metallicity [Fe/H] | +0.01 ± 0.17[4] dex |
Other designations | |
Database references | |
SIMBAD | data |
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 2 3 4 5 van Leeuwen, F. (2007). "HIP 32984". Hipparcos, the New Reduction. Retrieved 2009-12-17.
- ↑ 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, arXiv:0811.3982, Bibcode:2009A&A...501..941H, doi:10.1051/0004-6361/200811191.
- ↑ Kovtyukh; et al. (2003). "High precision effective temperatures for 181 F-K dwarfs from line-depth ratios". Astronomy and Astrophysics. 411 (3): 559–564. arXiv:astro-ph/0308429. Bibcode:2003A&A...411..559K. doi:10.1051/0004-6361:20031378.
- ↑ 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. arXiv:1112.4567. Bibcode:2012ApJ...748...93R. doi:10.1088/0004-637X/748/2/93.
External links
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