HR 511

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HR 511
Cassiopeia constellation map.svg
Red circle.svg
Location of HR 511 (circled)
Observation data
Epoch J2000       Equinox J2000
Constellation Cassiopeia [1]
Right ascension 01h 47m 44.83444s [2]
Declination +63° 51′ 09.0110″ [2]
Apparent magnitude  (V)5.63 [3]
Characteristics
Spectral type K0 V [4]
U−B color index +0.40 [3]
B−V color index +0.80 [4]
Astrometry
Radial velocity (Rv)+2.62±0.12 [2] km/s
Proper motion (μ)RA: +581.684 mas/yr [2]
Dec.: −246.462 mas/yr [2]
Parallax (π)99.5902±0.0438  mas [2]
Distance 32.75 ± 0.01  ly
(10.041 ± 0.004  pc)
Absolute magnitude  (MV)5.61 [5]
Details
Mass 0.825±0.021 [6]   M☉
Radius 0.819±0.024 [7]   R☉
Luminosity 0.516±0.010 [6]   L☉
Temperature 5,407±4.0 [8]   K
Metallicity [Fe/H]−0.02 [9]   dex
Rotation 21.67 days [10]
Rotational velocity (v sin i)2.0 [10]  km/s
Age 2.2 - 3.5 [10]   Gyr
Other designations
V987 Cassiopeiae, BD+63°238, GJ 75, HD 10780, HIP 8362, HR 511, SAO 11983, LHS 1297, LTT 10619 [11]
Database references
SIMBAD data
ARICNS data

HR 511 (also designated V987 Cassiopeiae and Gliese 75 among others) is an orange dwarf of spectral type K0V in the constellation Cassiopeia. With an apparent magnitude of 5.63, [3] it is faintly visible to the naked eye. The star is relatively close, 32.8 light-years from the Sun. [2]

This star is estimated to be about the same age as the Sun, with 83% of the mass of the Sun and 82% of the Sun's radius. It has not been identified as a member of any moving star groups. This star has displayed unusual emissions of Ca II and is much more x-ray luminous than the Sun. It is considered a relatively active star. [10] Based on an iron abundance of [Fe/H] = −0.02, the metallicity of this star appears to be similar to that of the Sun. [9]

References

  1. ↑ Anderson, E.; Francis, Ch. (May 2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331–346, arXiv: 1108.4971 , Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015, eISSN   1562-6873, ISSN   1063-7737, S2CID   119257644
  2. 1 2 3 4 5 6 7 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv: 2208.00211 . Bibcode:2023A&A...674A...1G. doi: 10.1051/0004-6361/202243940 . S2CID   244398875. Gaia DR3 record for this source at VizieR.
  3. 1 2 3 Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data. SIMBAD, Bibcode:1986EgUBV........0M
  4. 1 2 White, Russel J.; Gabor, Jared M.; Hillenbrand, Lynne A. (June 2007), "High-Dispersion Optical Spectra of Nearby Stars Younger Than the Sun", The Astronomical Journal, 133 (6): 2524–2536, arXiv: 0706.0542 , Bibcode:2007AJ....133.2524W, doi:10.1086/514336, S2CID   122854
  5. ↑ Holmberg, J.; et al. (July 2009), "The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics", Astronomy and Astrophysics, 501 (3): 941–947, arXiv: 0811.3982 , Bibcode:2009A&A...501..941H, doi:10.1051/0004-6361/200811191, S2CID   118577511
  6. 1 2 Boyajian, Tabetha S.; et al. (February 2012), "Stellar Diameters and Temperatures. I. Main-sequence A, F, and G Stars", The Astrophysical Journal, 746 (1): 101, arXiv: 1112.3316 , Bibcode:2012ApJ...746..101B, doi:10.1088/0004-637X/746/1/101, S2CID   18993744 . See Table 10.
  7. ↑ Demory, B.-O.; et al. (October 2009), "Mass-radius relation of low and very low-mass stars revisited with the VLTI", Astronomy and Astrophysics, 505 (1): 205–215, arXiv: 0906.0602 , Bibcode:2009A&A...505..205D, doi:10.1051/0004-6361/200911976, S2CID   14786643
  8. ↑ Kovtyukh, V. V.; et al. (2003), "High precision effective temperatures for 181 F-K dwarfs from line-depth ratios", Astronomy and Astrophysics , 411 (3): 559–564, arXiv: astro-ph/0308429 , Bibcode:2003A&A...411..559K, doi:10.1051/0004-6361:20031378, S2CID   18478960
  9. 1 2 Feltzing, S.; Gonzalez, G. (2001), "The nature of super-metal-rich stars. Detailed abundance analysis of 8 super-metal-rich star candidates", Astronomy and Astrophysics, 367 (1): 253–265, Bibcode:2001A&A...367..253F, doi: 10.1051/0004-6361:20000477
  10. 1 2 3 4 Gaidos, E. J.; Henry, G. W.; Henry, S. M. (2000), "Spectroscopy and Photometry of Nearby Young Solar Analogs", The Astronomical Journal, 120 (2): 1006–1013, Bibcode:2000AJ....120.1006G, CiteSeerX   10.1.1.43.4478 , doi:10.1086/301488, S2CID   16930014
  11. ↑ "HR 511", SIMBAD , Centre de données astronomiques de Strasbourg , retrieved 2016-07-09
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