Astronomy:Gliese 880
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Short description: Star in the constellation Pegasus
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| 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[1] mas/yr Dec.: −284.131±0.025[1] mas/yr |
| Parallax (π) | 145.6234 ± 0.0254[1] mas |
| 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
- ↑ 1.0 1.1 1.2 1.3 1.4 Brown, A. G. A. (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics 649: A1. doi:10.1051/0004-6361/202039657. Bibcode: 2021A&A...649A...1G. Gaia EDR3 record for this source at VizieR.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A.
- ↑ 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, doi:10.1051/0004-6361/201834483, Bibcode: 2019A&A...623A..24F
- ↑ 4.0 4.1 4.2 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. doi:10.1086/513142. Bibcode: 2007ApJ...660..732L.
- ↑ Abia, C. et al. (2020), "The CARMENES search for exoplanets around M dwarfs: Rubidium abundances in nearby cool stars", Astronomy & Astrophysics 642: A227, doi:10.1051/0004-6361/202039032, Bibcode: 2020A&A...642A.227A
- ↑ 6.0 6.1 Lindgren, Sara; Heiter, Ulrike (2017). "Metallicity determination of M dwarfs. Expanded parameter range in metallicity and effective temperature". Astronomy and Astrophysics 604: A97. doi:10.1051/0004-6361/201730715. Bibcode: 2017A&A...604A..97L.
- ↑ 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. doi:10.1093/mnras/stv1441. Bibcode: 2015MNRAS.452.2745S.
- ↑ "HD 216899". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+216899.
- ↑ Lamman, Claire et al. (2020), "Robo-AO M-dwarf Multiplicity Survey: Catalog", The Astronomical Journal 159 (4): 139, doi:10.3847/1538-3881/ab6ef1, Bibcode: 2020AJ....159..139L
- ↑ 10.0 10.1 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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