Gliese 163

Gliese 163
Observation data; Epoch J2000 Equinox J2000
Constellation	Dorado
Right ascension	04h 09m 15.663s
Declination	−53° 22′ 25.31″
Apparent magnitude (V)	11.8
Characteristics
Spectral type	M3.5V
Astrometry
Absolute magnitude (MV)	10.9
Details
Mass	0.30[1] M☉
Luminosity	0.01 L☉
Temperature	3300[1] K
Metallicity [Fe/H]	0.1 ± 0.1[1] dex
Rotation	61.0±0.3 d[2]
Age	0.77 ± 0.03[1] Gyr
Other designations
	GJ 163, HIP 19394, LHS 188.
Database references
SIMBAD	data

Gliese 163 is an M3.5V red dwarf located 49 light years (15.0 pc) from the sun, in the constellation Dorado.[3] Its coordinates in the night sky are RA 04h 9m 16s and Dec. -53°22'. It has a visual magnitude of 11.8 and an absolute magnitude of 10.9.[3] Other stellar catalog names for it include HIP 19394 and LHS 188.

Planetary system

Artist concept of a red dwarf surrounded by three planets.

In September 2012, astronomers using the HARPS instrument announced the discovery of two planets orbiting Gliese 163.[4][5] One planet, Gliese 163 c, with an orbital period of 26 days, and a minimum mass of 6.9 Earth masses, was considered potentially in the habitable zone, although hotter than Earth, with a temperature of 60 deg. C (140 deg. F) It has an ecc. of 0.03 or 3 per.. A second planet, Gliese 163 b, was also announced, with an orbital period of 9 days. It would be way too hot to be considered habitable. Evidence was also found for a third planet orbiting further out than c and b.[4][5] In June 2013, it was concluded that at least 3 planets orbit around the star with a fourth planet being a possibility.[1] In a paper submitted to arXiv in June 2019, Gliese 163 was found to have five planets.[6]

The Gliese 163 planetary system[7][6]
Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b	≥9.9±2.3 M_⊕	0.060+0.005 −0.006	8.6312+0.0023 −0.0021	0.02+0.12 −0.02	—	—
c	≥7.6+2.9 −2.3 M_⊕	0.124+0.010 −0.013	25.637±0.042	0.03+0.18 −0.03	—	—
f	≥6.8±4.4 M_⊕	0.326+0.027 −0.034	109.5+1.6 −1.4	0.04+0.23 −0.04	—	—
e	≥13.6+8.2 −6.5 M_⊕	0.700±0.066	349+12 −10	0.03+0.25 −0.03	—	—
d	≥20.2±7.6 M_⊕	1.021+0.088 −0.118	604+29 −24	0.02+0.22 −0.02	—	—

References

Tuomi, M.; Anglada-Escudé, G. (2013). "Up to four planets around the M dwarf GJ 163". Astronomy & Astrophysics. 556: A111. arXiv:1306.1717. doi:10.1051/0004-6361/201321174. S2CID 16214668.
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, S2CID 119181646.
Staff (September 20, 2012). "LHS 188 -- High proper-motion Star". Centre de données astronomiques de Strasbourg (Strasbourg astronomical Data Center). Retrieved September 20, 2012.
Méndez, Abel (August 29, 2012). "A Hot Potential Habitable Exoplanet around Gliese 163". University of Puerto Rico at Arecibo (Planetary Habitability Laboratory). Retrieved September 20, 2012.
Redd, Nola Taylor (September 20, 2012). "Newfound Alien Planet a Top Contender to Host Life". Space.com. Retrieved September 20, 2012.
Tuomi, M.; et al. (11 June 2019). "Frequency of planets orbiting M dwarfs in the Solar neighborhood". arXiv:1906.04644 [astro-ph.EP].
Bonfils, X.; Lo Curto, G.; Correia, A. C. M.; Laskar, J.; Udry, S.; Delfosse, X.; Forveille, T.; Astudillo-Defru, N.; Benz, W.; Bouchy, F.; Gillon, M.; Hébrard, G.; Lovis, C.; Mayor, M.; Moutou, C.; Naef, D.; Neves, V.; Pepe, F.; Perrier, C.; Queloz, D.; Santos, N. C.; Ségransan, D. (5 August 2013). "The HARPS search for southern extra-solar planets". Astronomy & Astrophysics. 556: A110. arXiv:1306.0904. Bibcode:2013A&A...556A.110B. doi:10.1051/0004-6361/201220237. S2CID 118456453.

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[Tuomi-1] Tuomi, M.; Anglada-Escudé, G. (2013). "Up to four planets around the M dwarf GJ 163". Astronomy & Astrophysics. 556: A111. arXiv:1306.1717. doi:10.1051/0004-6361/201321174. S2CID 16214668.

[mnras452_3_2745-2] 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, S2CID 119181646.

[Simbad-20120920-3] Staff (September 20, 2012). "LHS 188 -- High proper-motion Star". Centre de données astronomiques de Strasbourg (Strasbourg astronomical Data Center). Retrieved September 20, 2012.

[PHL-20120829-4] Méndez, Abel (August 29, 2012). "A Hot Potential Habitable Exoplanet around Gliese 163". University of Puerto Rico at Arecibo (Planetary Habitability Laboratory). Retrieved September 20, 2012.

[Space-20120920-5] Redd, Nola Taylor (September 20, 2012). "Newfound Alien Planet a Top Contender to Host Life". Space.com. Retrieved September 20, 2012.

[Tuomi2019-6] Tuomi, M.; et al. (11 June 2019). "Frequency of planets orbiting M dwarfs in the Solar neighborhood". arXiv:1906.04644 [astro-ph.EP].

[Gliese163_planets-7] Bonfils, X.; Lo Curto, G.; Correia, A. C. M.; Laskar, J.; Udry, S.; Delfosse, X.; Forveille, T.; Astudillo-Defru, N.; Benz, W.; Bouchy, F.; Gillon, M.; Hébrard, G.; Lovis, C.; Mayor, M.; Moutou, C.; Naef, D.; Neves, V.; Pepe, F.; Perrier, C.; Queloz, D.; Santos, N. C.; Ségransan, D. (5 August 2013). "The HARPS search for southern extra-solar planets". Astronomy & Astrophysics. 556: A110. arXiv:1306.0904. Bibcode:2013A&A...556A.110B. doi:10.1051/0004-6361/201220237. S2CID 118456453.