Gliese 880
Star in the constellation Pegasus
Observation data Epoch J2000 Equinox | |
---|---|
Constellation | Pegasus |
Right ascension | 22h 56m 34.805s[1] |
Declination | 16° 33′ 12.36″[1] |
Apparent magnitude (V) | 8.68[2] |
Characteristics | |
Evolutionary stage | Main-sequence star |
Spectral type | M1.5V[3] |
Apparent magnitude (B) | 10.187[2] |
Apparent magnitude (R) | 7.80[2] |
Apparent magnitude (I) | 7.100[2] |
Apparent magnitude (J) | 5.360±0.020[2] |
Apparent magnitude (H) | 4.800±0.036[2] |
Apparent magnitude (K) | 4.523±0.016[2] |
B−V color index | 1.507±0.015[2] |
Astrometry | |
Radial velocity (Rv) | −27.99±0.16[1] km/s |
Proper motion (μ) | RA: −1034.733±0.026 mas/yr[1] Dec.: −284.131±0.025 mas/yr[1] |
Parallax (π) | 145.6234 ± 0.0254 mas[1] |
Distance | 22.397 ± 0.004 ly (6.867 ± 0.001 pc) |
Absolute magnitude (MV) | 9.50[2] |
Details | |
Mass | 0.5860±0.0586[4] M☉ |
Radius | 0.689±0.044[4] R☉ |
Surface gravity (log g) | 4.77[5] cgs |
Temperature | 3,373±100[4] K |
Metallicity [Fe/H] | +0.20±0.05[6] dex |
Rotation | 37.5±0.1 d[7] |
Rotational velocity (v sin i) | 2.07[6] km/s |
Other designations | |
Database references | |
SIMBAD | data |
Gliese 880 is a red dwarf star in the northern constellation of Pegasus that may host an exoplanetary companion. No stellar companions to Gliese 880 have been discovered as of 2020.[9]
Planetary system
In June 2019, a candidate planet was reported in orbit around Gliese 880.[10]
Companion (in order from star) | Mass | Semimajor axis (AU) | Orbital period (days) | Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b (unconfirmed) | 8.5+5.7 −4.7 M🜨 | 0.187+0.016 −0.020 | 39.372+0.050 −0.059 | 0.13+0.25 −0.13 | — | — |
References
- ^ a b c d e Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
- ^ a b c d e f g h i 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.
- ^ Fuhrmeister, B.; et al. (2019), "The CARMENES search for exoplanets around M dwarfs. Period search in H{alpha}, Na I D, and Ca II IRT lines", Astronomy & Astrophysics, 623: A24, arXiv:1901.05173, Bibcode:2019A&A...623A..24F, doi:10.1051/0004-6361/201834483, S2CID 119064800
- ^ a b c Lopez-Morales, Mercedes (May 2007). "On the Correlation between the Magnetic Activity Levels, Metallicities, and Radii of Low-Mass Stars". The Astrophysical Journal. 660 (1): 732–739. arXiv:astro-ph/0701702. Bibcode:2007ApJ...660..732L. doi:10.1086/513142. S2CID 119530297.
- ^ Abia, C.; et al. (2020), "The CARMENES search for exoplanets around M dwarfs: Rubidium abundances in nearby cool stars", Astronomy & Astrophysics, 642: A227, arXiv:2009.00876, Bibcode:2020A&A...642A.227A, doi:10.1051/0004-6361/202039032, S2CID 221447685
- ^ a b Lindgren, Sara; Heiter, Ulrike (2017). "Metallicity determination of M dwarfs. Expanded parameter range in metallicity and effective temperature". Astronomy and Astrophysics. 604: A97. arXiv:1705.08785. Bibcode:2017A&A...604A..97L. doi:10.1051/0004-6361/201730715. S2CID 119216828.
- ^ Suárez Mascareño, A.; et al. (September 2015). "Rotation periods of late-type dwarf stars from time series high-resolution spectroscopy of chromospheric indicators". Monthly Notices of the Royal Astronomical Society. 452 (3): 2745–2756. arXiv:1506.08039. Bibcode:2015MNRAS.452.2745S. doi:10.1093/mnras/stv1441.
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: CS1 maint: unflagged free DOI (link) - ^ "HD 216899". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-11-23.
- ^ Lamman, Claire; et al. (2020), "Robo-AO M-dwarf Multiplicity Survey: Catalog", The Astronomical Journal, 159 (4): 139, arXiv:2001.05988, Bibcode:2020AJ....159..139L, doi:10.3847/1538-3881/ab6ef1, S2CID 210718832
- ^ a b Barnes, J. R.; et al. (2019-06-11). "Frequency of planets orbiting M dwarfs in the Solar neighbourhood". arXiv:1906.04644 [astro-ph.EP].
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Constellation of Pegasus
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