Astronomy:Ross 695
| Observation data 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[2] mas/yr Dec.: −2,309.019[2] mas/yr |
| Parallax (π) | 112.6740 ± 0.0241[2] mas |
| 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 | |
| Database references | |
| SIMBAD | data |
Ross 695, also known as Gliese 465, is a red dwarf star in the southern constellation of 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
- ↑ 1.0 1.1 Kirkpatrick, J. Davy 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. doi:10.3847/1538-4365/ad24e2. Bibcode: 2024ApJS..271...55K.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ 3.0 3.1 3.2 Koen, C. 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. doi:10.1111/j.1365-2966.2009.16182.x. Bibcode: 2010MNRAS.403.1949K.
- ↑ 4.0 4.1 4.2 4.3 4.4 Schweitzer, A. 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. doi:10.1051/0004-6361/201834965. Bibcode: 2019A&A...625A..68S.
- ↑ "Ross 695". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Ross+695.
- ↑ "The Colour of Stars". Australia Telescope, Outreach and Education. Commonwealth Scientific and Industrial Research Organisation. December 21, 2004. http://outreach.atnf.csiro.au/education/senior/astrophysics/photometry_colour.html. Retrieved 2012-01-16.
- ↑ Bonfils, Xavier; Delfosse, Xavier; Udry, Stéphane; Forveille, Thierry; Mayor, Michel; Perrier, Christian; Bouchy, François; Gillon, Michaël et al. (2011). "The HARPS search for southern extra-solar planets XXXI. The M-dwarf sample". Astronomy and Astrophysics 549: A109. doi:10.1051/0004-6361/201014704. Bibcode: 2013A&A...549A.109B.
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