Ross 695

Last updated
Ross 695
Observation data
Epoch J2000.0        Equinox J2000.0 (ICRS)
Constellation Corvus [1]
Right ascension 12h 24m 52.50301s [2]
Declination −18° 14′ 32.2571″ [2]
Apparent magnitude  (V)11.272 [3]
Characteristics
Evolutionary stage main sequence [4]
Spectral type M2.0V [4]
B−V color index 1.591 [3]
Astrometry
Radial velocity (Rv)51.06±0.17 [2] km/s
Proper motion (μ)RA: +1,095.592 mas/yr [2]
Dec.: −2,309.019 mas/yr [2]
Parallax (π)112.6740±0.0241  mas [2]
Distance 28.947 ± 0.006  ly
(8.875 ± 0.002  pc)
Absolute magnitude  (MV)11.54 [3]
Details [4]
Mass 0.262±0.012  M☉
Radius 0.271±0.008  R☉
Luminosity 0.00980±0.00015  L☉
Surface gravity (log g)4.98±0.07  cgs
Temperature 3485±51  K
Metallicity [Fe/H]−0.17±0.16  dex
Other designations
GJ 465, HIP 60559, LFT 904, LHS 45, LPM 424, LTT 4685, PLX 2857, Ross 695 [5]
Database references
SIMBAD data

Ross 695, also known as Gliese 465, is a red dwarf star in the constellation Corvus. The distance to this star, based on parallax measurements by the Gaia spacecraft, is 28.947 light-years (8.875 parsecs ). [2] It is the nearest star in this constellation. [1] Despite its closeness, this star is intrinsically faint and, at apparent magnitude 11.27, is too faint to be seen with the unaided eye.

This star has a spectral type of M2.0V; with around 26.2% the mass and 27.1% the radius of the Sun, but only 0.98% its luminosity. The effective temperature of the star is 3490  K , [4] giving it a reddish hue. [6] Its iron-to-hydrogen ratio appears to be lower than that of the Sun. [4]

Investigation of its radial velocity has failed to find any evidence of a planetary companion. [7]

References

  1. 1 2 Kirkpatrick, J. Davy; Marocco, Federico; et al. (April 2024). "The Initial Mass Function Based on the Full-sky 20 pc Census of ~3600 Stars and Brown Dwarfs". The Astrophysical Journal Supplement Series . 271 (2): 55. arXiv: 2312.03639 . Bibcode:2024ApJS..271...55K. doi: 10.3847/1538-4365/ad24e2 .
  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 Koen, C.; Kilkenny, D.; et al. (April 2010). "UBV(RI)C JHK observations of Hipparcos-selected nearby stars". Monthly Notices of the Royal Astronomical Society . 403 (4): 1949–1968. Bibcode:2010MNRAS.403.1949K. doi:10.1111/j.1365-2966.2009.16182.x.
  4. 1 2 3 4 5 Schweitzer, A.; Passegger, V. M.; et al. (May 2019). "The CARMENES search for exoplanets around M dwarfs. Different roads to radii and masses of the target stars". Astronomy & Astrophysics . 625: A68. arXiv: 1904.03231 . Bibcode:2019A&A...625A..68S. doi:10.1051/0004-6361/201834965.
  5. ↑ "Ross 695". SIMBAD . Centre de données astronomiques de Strasbourg.
  6. ↑ "The Colour of Stars". Australia Telescope, Outreach and Education. Commonwealth Scientific and Industrial Research Organisation. December 21, 2004. Archived from the original on 2013-12-03. Retrieved 2012-01-16.
  7. ↑ Bonfils, Xavier; Delfosse, Xavier; Udry, Stéphane; Forveille, Thierry; Mayor, Michel; Perrier, Christian; Bouchy, François; Gillon, Michaël; Lovis, Christophe; Pepe, Francesco; Queloz, Didier; Santos, Nuno C.; Ségransan, Damien; Bertaux, Jean-Loup (2011). "The HARPS search for southern extra-solar planets XXXI. The M-dwarf sample". Astronomy and Astrophysics. 549: A109. arXiv: 1111.5019 . Bibcode:2013A&A...549A.109B. doi:10.1051/0004-6361/201014704. S2CID   119288366.
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