Gliese 1061

Gliese 1061 is a red dwarf star located approximately 12 light-years from Earth in the southern constellation of Horologium. Even though it is a relatively nearby star it has an apparent visual magnitude of about 13[2] so it can only be seen with at least a moderately-sized telescope.

Gliese 1061
Observation data
Epoch J2000      Equinox J2000
Constellation Horologium
Right ascension 03h 35m 59.69s[1]
Declination −44° 30′ 45.3″[1]
Apparent magnitude (V) 13.03[2]
Characteristics
Spectral type M5.5 V[2]
Apparent magnitude (J) 7.52 ± 0.02[3]
U−B color index 1.52[3]
B−V color index 1.90[3]
Astrometry
Radial velocity (Rv)−8 km/s
Proper motion (μ) RA: 750.01[4] mas/yr
Dec.: -349.98[5] mas/yr
Parallax (π)270.86 ± 1.29[6] mas
Distance12.04 ± 0.06 ly
(3.69 ± 0.02 pc)
Absolute magnitude (MV)15.26[4]
Details
Mass0.113[5] M☉
Luminosity0.001[5] L☉
Metallicity [Fe/H]−0.09±0.09[7] dex
Rotational velocity (v sin i)≤ 5[8] km/s
Other designations
GJ 1061, LHS 1565, LFT 295, LTT 1702, LP 995-46, L 372-58[3]
Database references
SIMBADdata

The proper motion of Gliese 1061 has been known since 1974, but it was estimated to be further away: approximately 25 light-years distant based upon an estimated parallax of 0.130″. Its distance was only accurately determined in 1997 by the RECONS team. At that time, it was the 20th-nearest star system to the Sun. The discovery team noted that many more stars such as this are likely to be discovered nearby.[2]

This star is a very small, dim, red dwarf, close to the lower mass limit for a star. It has an estimated mass of about 11.3% of the Sun and is only 0.1% as luminous.[5] The star displays no significant infrared excess due to circumstellar dust.[9]

Planetary system
Orbits of the exoplanets in the Gliese 1061 system compared to the HZ.

On August 13, 2019, a planetary system was announced orbiting the star Gliese 1061 by the Red Dots project of detecting terrestrial planets around nearby red dwarf stars.[10] The planet Gliese 1061 d orbits in the conservative circumstellar habitable zone of its star and the planet Gliese 1061 c orbits in the inner edge of the habitable zone.[10]

The Gliese 1061 planetary system
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b 1.38+0.16
−0.15 M⊕		 0.021 ± 0.001 3.204 ± 0.001 < 0.31 — —
c 1.75 ± 0.23 M⊕ 0.035 ± 0.001 6.689 ± 0.005 < 0.29 — —
d 1.68+0.25
−0.24 M⊕		 0.054 ± 0.001 13.031+0.025
−0.032		 < 0.53 — —

See also

References
  1. Cutri, R. M.; et al. (June 2003). "2MASS All-Sky Catalog of Point Sources". VizieR On-line Data Catalog: II/246. Bibcode:2003yCat.2246....0C.
  2. Henry, Todd J.; et al. (1997). "The solar neighborhood IV: discovery of the twentieth nearest star". The Astronomical Journal. 114: 388–395. Bibcode:1997AJ....114..388H. doi:10.1086/118482.
  3. "LHS 1565". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2008-12-11.
  4. Scholz, R.-D.; et al. (2000). "New high-proper motion survey in the Southern sky". Astronomy and Astrophysics. 353: 958–969. Bibcode:2000A&A...353..958S.
  5. "The One Hundred Nearest Star Systems". RECONS. 2008-01-01. Retrieved 2008-12-11.
  6. Lurie, John C.; et al. (2014). "The Solar Neighborhood. XXXIV. a Search for Planets Orbiting Nearby M Dwarfs Using Astrometry". The Astronomical Journal. 148 (5): 91. arXiv:1407.4820. Bibcode:2014AJ....148...91L. doi:10.1088/0004-6256/148/5/91. S2CID 118492541.
  7. Neves, V.; et al. (August 2014). "Metallicity of M dwarfs. IV. A high-precision [Fe/H] and Teff technique from high-resolution optical spectra for M dwarfs". Astronomy & Astrophysics. 568: 22. arXiv:1406.6127. Bibcode:2014A&A...568A.121N. doi:10.1051/0004-6361/201424139. S2CID 118619790. A121.
  8. Barnes, J. R.; et al. (April 2014). "Precision radial velocities of 15 M5-M9 dwarfs". Monthly Notices of the Royal Astronomical Society. 439 (3): 3094–3113. arXiv:1401.5350. Bibcode:2014MNRAS.439.3094B. doi:10.1093/mnras/stu172. S2CID 16005221.
  9. Avenhaus, H.; et al. (December 2012). "The nearby population of M-dwarfs with WISE: a search for warm circumstellar dust". Astronomy & Astrophysics. 548: 15. arXiv:1209.0678. Bibcode:2012A&A...548A.105A. doi:10.1051/0004-6361/201219783. S2CID 56397054. A105.
  10. Anglada-Escudé, G.; Reiners, A.; Pallé, E.; Ribas, I.; Berdiñas, Z. M.; López, C. Rodríguez; Morales, N.; López-González, M. J.; Hambsch, F.-J. (2019-08-13). "Red Dots: A temperate 1.5 Earth-mass planet in a compact multi-terrestrial planet system around GJ1061". Monthly Notices of the Royal Astronomical Society. arXiv:1908.04717. doi:10.1093/mnras/staa248. S2CID 199551874.
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