HD 36678

HD 36678
Observation data
Epoch J2000      Equinox J2000
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 mas[1]
Distance840 ± 30 ly
(256 ± 9 pc)
Absolute magnitude (MV)–1.00[5]
Details
Mass1.38[7] M☉
Radius63.2+7.0
−4.7[1] R☉
Luminosity875±34[1] L☉
Surface gravity (log g)0.79[7] cgs
Temperature3,950+154
−202[1] K
Metallicity [Fe/H]−0.12[7] dex
Other designations
BD+54°914, HD 36678, HIP 26344, HR 1866, SAO 25276
Database references
SIMBADdata

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. ^ a b c d e f g h i j k l Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  2. ^ a b c 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. S2CID 17804304.
  3. ^ a b c Eggen, O. J. (1992). "Asymptotic giant branch stars near the sun". The Astronomical Journal. 104: 275. Bibcode:1992AJ....104..275E. doi:10.1086/116239.
  4. ^ 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. ^ a b Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. S2CID 119257644.
  6. ^ a b EAS (1997). "The HIPPARCOS and TYCHO catalogues". Astrometric and Photometric Star Catalogues Derived from the ESA Hipparcos Space Astrometry Mission. ESA SP Series. 1200. Noordwijk, Netherlands: ESA Publications Division. Bibcode:1997ESASP1200.....E. ISBN 9290923997.
  7. ^ a b c Anders, F.; Khalatyan, A.; Chiappini, C.; Queiroz, A. B.; Santiago, B. X.; Jordi, C.; Girardi, L.; Brown, A. G. A.; Matijevič, G.; Monari, G.; Cantat-Gaudin, T.; Weiler, M.; Khan, S.; Miglio, A.; Carrillo, I.; Romero-Gómez, M.; Minchev, I.; De Jong, R. S.; Antoja, T.; Ramos, P.; Steinmetz, M.; Enke, H. (2019). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy and Astrophysics. 628: A94. arXiv:1904.11302. Bibcode:2019A&A...628A..94A. doi:10.1051/0004-6361/201935765. S2CID 131780028.
  8. ^ 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. S2CID 14878976.
  9. ^ Samus, N. N.; Durlevich, O. V.; 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.

Strategi Solo vs Squad di Free Fire: Cara Menang Mudah!