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Gliese 880

Summary

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]

Gliese 880
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]
Distance22.397 ± 0.004 ly
(6.867 ± 0.001 pc)
Absolute magnitude (MV)9.50[2]
Details
Mass0.5860±0.0586[4] M☉
Radius0.689±0.044[4] R☉
Surface gravity (log g)4.77[5] cgs
Temperature3,373±100[4] K
Metallicity [Fe/H]+0.20±0.05[6] dex
Rotation37.5±0.1 d[7]
Rotational velocity (v sin i)2.07[6] km/s
Other designations
BD+15 4733, Gaia DR2 2828928008202069376, HD 216899, HIP 113296, Ross 671, 2MASS J22563497+1633130[8]
Database references
SIMBADdata

Planetary system edit

In June 2019, a candidate planet was reported in orbit around Gliese 880.[10]

The Gliese 880 planetary system[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 edit

  1. ^ 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.
  2. ^ 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.
  3. ^ 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
  4. ^ 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.
  5. ^ 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
  6. ^ 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.
  7. ^ 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.
  8. ^ "HD 216899". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-11-23.
  9. ^ 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
  10. ^ 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].