HR 4699

HR 4699
Observation data
Epoch J2000      Equinox ICRS
Constellation Corvus
Right ascension 12h 20m 55.71287s
Declination –13° 33′ 56.6100″
Apparent magnitude (V) +5.14
Characteristics
Spectral type K0 III
U−B color index +0.93
B−V color index +1.048±0.003
Astrometry
Radial velocity (Rv)+14.0±0.7 km/s
Proper motion (μ) RA: –4.93 mas/yr
Dec.: +9.86 mas/yr
Parallax (π)16.21±0.29 mas
Distance201 ± 4 ly
(62 ± 1 pc)
Absolute magnitude (MV)1.18
Details
Mass1.76 M☉
Radius9.92+0.11
−0.16 R☉
Luminosity43±1 L☉
Surface gravity (log g)3.01 cgs
Temperature4,707+38
−27 K
Metallicity [Fe/H]0.00±0.05 dex
Rotational velocity (v sin i)0.0 km/s
Age1.97 Gyr
Other designations
BD–12°3614, HD 107418, HIP 60221, HR 4699, SAO 157226
Database references
SIMBADdata

HR 4699 is a single star in the southern constellation of Corvus. It is orange in hue and is dimly visible to the naked eye with an apparent visual magnitude of +5.14. This star is located at a distance of approximately 201 light years from the Sun based on parallax. It is drifting further away with a radial velocity of +14 km/s, after come to within 45.1 light-years some four million years ago.

This is an aging giant star with a stellar classification of K0 III, having exhausted the supply of hydrogen at its core then cooled and expanded to almost ten times the Sun's radius. It is nearly two billion years old with 1.76 times the mass of the Sun. The star is radiating 43 times the luminosity of the Sun from its photosphere at an effective temperature of 4,707 K.

References

  1. 1 2 3 4 5 6 van Leeuwen, F. (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. S2CID 18759600.
  2. 1 2 3 4 5 6 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.
  3. 1 2 Houk, Nancy; Smith-Moore, M. (1978). Michigan catalogue of two-dimensional spectral types for the HD stars. Vol. 4. Ann Arbor: Dept. of Astronomy, University of Michigan. Bibcode:1988mcts.book.....H.
  4. ↑ Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Catalogue of Eggen's UBV Data. Bibcode:1986EgUBV........0M.
  5. 1 2 3 4 Luck, R. Earle (2015). "Abundances in the Local Region. I. G and K Giants". The Astronomical Journal. 150 (3): 88. arXiv:1507.01466. Bibcode:2015AJ....150...88L. doi:10.1088/0004-6256/150/3/88. S2CID 118505114.
  6. 1 2 3 4 5 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.
  7. ↑ Luck, R. Earle; Heiter, Ulrike (June 2007). "Giants in the Local Region". The Astronomical Journal. 133 (6): 2464–2486. Bibcode:2007AJ....133.2464L. doi:10.1086/513194.
  8. ↑ Gáspár, András; et al. (2016). "The Correlation between Metallicity and Debris Disk Mass". The Astrophysical Journal. 826 (2): 171. arXiv:1604.07403. Bibcode:2016ApJ...826..171G. doi:10.3847/0004-637X/826/2/171. S2CID 119241004.
  9. ↑ Massarotti, Alessandro; et al. (January 2008). "Rotational and Radial Velocities for a Sample of 761 HIPPARCOS Giants and the Role of Binarity". The Astronomical Journal. 135 (1): 209–231. Bibcode:2008AJ....135..209M. doi:10.1088/0004-6256/135/1/209. S2CID 121883397.
  10. ↑ "HD 107418". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-12-07.
  11. ↑ 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.