HD 118508
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Boötes |
| Right ascension | 13h 36m 59.08289s[1] |
| Declination | +24° 36′ 47.8734″[1] |
| Apparent magnitude (V) | 5.8021±0.0017[2] |
| Characteristics | |
| Spectral type | M2III[3] |
| U−B color index | +1.85[4] |
| B−V color index | +1.58[4] |
| Astrometry | |
| Radial velocity (Rv) | −35.69±0.18[2] km/s |
| Proper motion (μ) | RA: -26.20[1] mas/yr Dec.: -2.02[1] mas/yr |
| Parallax (π) | 7.11 ± 0.34[1] mas |
| Distance | 460 ± 20 ly (141 ± 7 pc) |
| Details | |
| Luminosity | 324[5] L☉ |
| Temperature | 3,817[5] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 118508 is a variable star in the northern constellation of Boötes. It varies marginally in luminosity with an amplitude of 0.04 in magnitude.[6]
References
- 1 2 3 4 5 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.
- 1 2 Famaey, B.; et al. (2005), "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters", Astronomy and Astrophysics 430: 165–186, arXiv:astro-ph/0409579, Bibcode:2005A&A...430..165F, doi:10.1051/0004-6361:20041272.
- ↑ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x
- 1 2 Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV data. SIMBAD, Bibcode:1986EgUBV........0M
- 1 2 McDonald, I.; et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society 427 (1): 343–57, arXiv:1208.2037, Bibcode:2012MNRAS.427..343M, doi:10.1111/j.1365-2966.2012.21873.x
- ↑ Percy, John R.; Au, Winnie (November 1994), "APT Observations of Small-Amplitude Red Variables", Information Bulletin on Variable Stars (4114): 1, Bibcode:1994IBVS.4114....1P
External links
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