HD 76270

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HD 76270
Observation data
Epoch J2000      Equinox J2000
Constellation Volans
Right ascension 08h 49m 50.13s[1]
Declination −72° 33′ 04.46″[1]
Apparent magnitude (V) 6.10±0.01[2]
Characteristics
Spectral type A2 IIIa[3][note 1] or A3mA6-7[4]
B−V color index +0.19[2]
Variable type supsected[5]
Astrometry
Radial velocity (Rv)−2.6±1.1[6] km/s
Proper motion (μ) RA: −6.164±0.032[1] mas/yr
Dec.: +8.392±0.034[1] mas/yr
Parallax (π)1.4015 ± 0.0344[1] mas
Distance2,330 ± 60 ly
(710 ± 20 pc)
Absolute magnitude (MV)-3.15
Details
Mass4.20±0.34[7] M☉
Radius23.62+1.24
−0.94[1] R☉
Luminosity1,464±55[1] L☉
Surface gravity (log g)2.272+0.043
−0.056[7] cgs
Temperature7,347+150
−180[1] K
Metallicity26% solar
Metallicity [Fe/H]-0.59[7] dex
Other designations
44 G. Volantis, CD−72 488, HD 76270, HIP 43351, HR 3544, SAO 256556, 2MASS J08495011-7233044
Database references
SIMBADdata

HD 76270 (HR 3544) is a solitary star in the southern constellation Volans. With an apparent magnitude of 6.1, it's faintly visible to the naked eye under ideal conditions. The star is located 2,330 light-years (710 parsecs) from the Solar System, but is drifting with a heliocentric radial velocity of -2.6 km/s.

Properties[]

HD 76270 has an overall classification of A2 IIIa, which suggests it's an A-type star that has exhausted hydrogen at its core and left the main sequence. HD 76270 also has a classification of A3mA6-7, which states it's a chemically peculiar Am star with the metallic lines of an A6-7 star. It has 4.2 times the Sun's mass, but has expanded to 24 times the Sun's radius. HD 76270 radiates at 1,464 times the Sun's luminosity from it's enlarged photosphere at an effective temperature of 7,347 K. The star has been suspected of variability, with an amplitude of 0.03, and has a poor metallicity.

Notes[]

  1. ^ The luminosity class is self calculated and not part of the original data.

References[]

  1. ^ a b c d e f g 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 Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (1 March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. ISSN 0004-6361.
  3. ^ Cannon, A. J.; Pickering, E. C. (1 October 1993). "VizieR Online Data Catalog: Henry Draper Catalogue and Extension (Cannon+ 1918-1924; ADC 1989)". VizieR Online Data Catalog. 3135.
  4. ^ Houk, N.; Cowley, A. P. (1975). "University of Michigan Catalogue of two-dimensional spectral types for the HD stars. Volume I. Declinations -90_ to -53_f0". University of Michigan Catalogue of two-dimensional spectral types for the HD stars. Volume I. Declinations -90_ to -53_f0., by Houk, N.; Cowley, A. P.. Ann Arbor, MI (USA): Department of Astronomy, University of Michigan, 19 + 452 p.
  5. ^ Watson, C. L.; Henden, A. A.; Price, A. (1 May 2006). "The International Variable Star Index (VSX)". Society for Astronomical Sciences Annual Symposium. 25: 47.
  6. ^ Gontcharov, G. A. (1 November 2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32: 759–771. arXiv:1606.08053. doi:10.1134/S1063773706110065. ISSN 1063-7737.
  7. ^ a b c Anders, F.; Khalatyan, A.; Chiappini, C.; Queiroz, A. B.; Santiago, B. X.; Jordi, C.; Girardi, L.; Brown, A. G. A.; Matijevic, 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. (1 August 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. ISSN 0004-6361.
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