Astronomy:HD 36678
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Auriga |
| Right ascension | 05h 36m 35.21858s[1] |
| Declination | +54° 25′ 43.1638″[1] |
| Apparent magnitude (V) | 5.8334[2] |
| Characteristics | |
| Spectral type | M0III[3] |
| U−B color index | +1.98[4] |
| B−V color index | +1.671±0.006[5] |
| Variable type | suspected[6] |
| Astrometry | |
| Radial velocity (Rv) | 1.10±0.43[2] km/s |
| Proper motion (μ) | RA: −6.531[1] mas/yr Dec.: −10.196[1] mas/yr |
| Parallax (π) | 3.9037 ± 0.1314[1] mas |
| Distance | 840 ± 30 ly (256 ± 9 pc) |
| Absolute magnitude (MV) | –1.00[5] |
| Details | |
| Mass | 1.38[7] M☉ |
| Radius | 63.2+7.0 −4.7[1] R☉ |
| Luminosity | 875±34[1] L☉ |
| Surface gravity (log g) | 0.79[7] cgs |
| Temperature | 3,950+154 −202[1] K |
| Metallicity [Fe/H] | −0.12[7] dex |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 36678 is single[8] star in the northern constellation of Auriga. This star is dimly visible to the naked eye with an apparent visual magnitude of 5.83.[2] It is located at a distance of approximately 840 light years from the Sun based on parallax.[1]
This is an aging red giant star with a stellar classification of M0III.[3] It is currently on the asymptotic giant branch of the HR diagram,[3] and has expanded to ~63[1] times the radius of the Sun. The star is radiating ~875[1] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 3,950 K.[1]
The brightness of HD 36678 is suspected of being variable. Hipparcos photometry showed maximum and minimum apparent magnitudes of 5.806 and 5.855 respectively, in the Hipparcos photometric band.[6] No period was found, the variability has not been confirmed, and the star is not formally listed as a variable star.[9]
References
- ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 1.11 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. Gaia DR2 record for this source at VizieR.
- ↑ 2.0 2.1 2.2 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. doi:10.1051/0004-6361:20041272. Bibcode: 2005A&A...430..165F.
- ↑ 3.0 3.1 3.2 Eggen, O. J. (1992). "Asymptotic giant branch stars near the sun". The Astronomical Journal 104: 275. doi:10.1086/116239. Bibcode: 1992AJ....104..275E.
- ↑ 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 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A.
- ↑ 6.0 6.1 EAS (1997). "The HIPPARCOS and TYCHO catalogues". Astrometric and Photometric Star Catalogues Derived from the ESA Hipparcos Space Astrometry Mission. ESA SP Series (Noordwijk, Netherlands: ESA Publications Division) 1200. ISBN 9290923997. Bibcode: 1997ESASP1200.....E.
- ↑ 7.0 7.1 7.2 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.
- ↑ 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.
- ↑ Samus, N. N. et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S 1: B/gcvs. Bibcode: 2009yCat....102025S.
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