Astronomy:HD 118508
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Short description: Star in the constellation Boötes
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Boötes |
| Right ascension | 13h 36m 59.08233s[1] |
| Declination | +24° 36′ 47.8687″[1] |
| Apparent magnitude (V) | 5.8[2] |
| Characteristics | |
| Evolutionary stage | red giant |
| Spectral type | M2III[3] |
| U−B color index | +1.85[4] |
| B−V color index | +1.58[4] |
| Variable type | suspected[5] |
| Astrometry | |
| Radial velocity (Rv) | −35.69±0.18[2] km/s |
| Proper motion (μ) | RA: −26.654[1] mas/yr Dec.: −2.803[1] mas/yr |
| Parallax (π) | 5.9122 ± 0.0860[1] mas |
| Distance | 552 ± 8 ly (169 ± 2 pc) |
| Absolute magnitude (MV) | −0.431[6] |
| Details | |
| Mass | 1.1[7] M☉ |
| Radius | 49[8] R☉ |
| Luminosity | 324[9] L☉ |
| Surface gravity (log g) | 1.04[7] cgs |
| Temperature | 3,594[7] K |
| Metallicity [Fe/H] | +0.44[7] dex |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 118508 is a suspected variable star in the northern constellation of Boötes. Its apparent magnitude may vary with an amplitude of 0.04, discovered during a search for small-amplitude red variables.[5] It is a red giant about 552 light years away.
References
- ↑ 1.0 1.1 1.2 1.3 1.4 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ 2.0 2.1 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, doi:10.1051/0004-6361:20041272, Bibcode: 2005A&A...430..165F
- ↑ 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, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E
- ↑ 4.0 4.1 Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data. SIMBAD, Bibcode: 1986EgUBV........0M
- ↑ 5.0 5.1 Percy, John R.; Au, Winnie (November 1994), "APT Observations of Small-Amplitude Red Variables", Information Bulletin on Variable Stars 4114 (4114): 1, Bibcode: 1994IBVS.4114....1P
- ↑ Gontcharov, G. A. (2017), "VizieR Online Data Catalog: Tycho-2 red giant branch and carbon stars (Gontcharov, 2011)", VizieR On-line Data Catalog, Bibcode: 2017yCat..90370769G
- ↑ 7.0 7.1 7.2 7.3 Anders, F.; Khalatyan, A.; Chiappini, C.; Queiroz, A. B.; Santiago, B. X.; Jordi, C.; Girardi, L.; Brown, A. G. A. et al. (2019), "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18", Astronomy and Astrophysics 628: A94, doi:10.1051/0004-6361/201935765, Bibcode: 2019A&A...628A..94A
- ↑ Stassun K.G. (October 2019), "The revised TESS Input Catalog and Candidate Target List", The Astronomical Journal 158 (4): 138, doi:10.3847/1538-3881/ab3467, Bibcode: 2019AJ....158..138S
- ↑ McDonald, I. et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society 427 (1): 343–57, doi:10.1111/j.1365-2966.2012.21873.x, Bibcode: 2012MNRAS.427..343M
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