GJ 1061

GJ 1061
Observation data
Epoch J2000      Equinox J2000
Constellation Horologium
Right ascension 03h 35m 59.64s[1]
Declination −44° 30′ 46.2″[1]
Apparent magnitude (V) 13.03[2]
Characteristics
Spectral type M5.5 V[2]
Apparent magnitude (J) 7.52 ± 0.02[1]
U−B color index 1.52[1]
B−V color index 1.90[1]
Astrometry
Radial velocity (Rv)−8 km/s
Proper motion (μ) RA: 750.01[3] mas/yr
Dec.: -349.98[4] mas/yr
Parallax (π)270.86 ± 1.29[5] mas
Distance12.04 ± 0.06 ly
(3.69 ± 0.02 pc)
Absolute magnitude (MV)15.26[3]
Details
Mass~0.113[4] M☉
Luminosity~0.001[4] L☉
Other designations
GJ 1061, LHS 1565, LFT 295, LTT 1702, LP 995-46, L 372-58.[1]
Database references
SIMBADdata

GJ 1061 is a small red dwarf approximately 12 light-years from Earth in the southern constellation of Horologium. Even though it is a relatively nearby it is very dim with a magnitude of about 13 so it can only be seen with at least a moderately-sized telescope.[1]

Significance

The proper motion of GJ 1061 has been known for some time, but it was thought to be much further away. 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]

Distance

GJ 1061 distance estimates

Source Parallax, mas Distance, pc Distance, ly Distance, Pm Ref.
Gliese & Jahreiß (1991) 233.0±57.0 4.3+1.4
−0.8		 14+4.5
−2.8		 132.4+42.9
−26		 [6]
Henry et al. (1997) 3.79±0.35 12.4±1.1 [2]
Henry et al. (1997) 273.4±5.2 3.66±0.07 11.93+0.23
−0.22		 112.9+2.2
−2.1		 [2]
Henry et al. (2006) 271.92±1.34 3.678±0.018 11.99±0.06 113.5±0.6 [7]
RECONS TOP100 (2012) 272.01±1.30[note 1] 3.676+0.018
−0.017		 11.99±0.06 113.4±0.5 [8]
Lurie et al. (2014) 270.86±1.29 3.692+0.018
−0.017		 12.04±0.06 113.9±0.5 [5]

Non-trigonometric distance estimates are marked in italic. The most precise estimate is marked in bold.

Properties

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.[4]

See also

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 "LHS 1565 -- High proper-motion Star". Centre de Données astronomiques de Strasbourg. Retrieved 2008-12-11.
  2. ↑ 2.0 2.1 2.2 2.3 2.4 Henry, Todd J.; Ianna, Philip A.; Kirkpatrick, J. Davy; Jahreiss, Hartmut (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. ↑ 3.0 3.1 Scholz, R.-D.; Irwin, M.; Ibata, R.; Jahreiß, H.; Malkov, O. Yu. (2000). "New high-proper motion survey in the Southern sky". Astronomy and Astrophysics 353: 958–969. Bibcode:2000A&A...353..958S.
  4. ↑ 4.0 4.1 4.2 4.3 "The One Hundred Nearest Star Systems". RECONS. 2008-01-01. Retrieved 2008-12-11.
  5. ↑ 5.0 5.1 Lurie, John C.; Henry, Todd J.; Jao, Wei-Chun; Quinn, Samuel N.; Winters, Jennifer G.; Ianna, Philip A.; Koerner, David W.; Riedel, Adric R.; Subasavage, John P. (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.
  6. ↑ Gliese, W. and Jahreiß, H. (1991). "GJ 1061". Preliminary Version of the Third Catalogue of Nearby Stars. Retrieved 2014-10-20.
  7. ↑ Henry, T. J.; Jao, Wei-Chun; Subasavage, John P.; Beaulieu, Thomas D.; Ianna, Philip A.; Costa, Edgardo; Méndez, René A. (2006). "The Solar Neighborhood. XVII. Parallax Results from the CTIOPI 0.9 m Program: 20 New Members of the RECONS 10 Parsec Sample". The Astronomical Journal 132 (6): 2360–2371. arXiv:astro-ph/0608230. Bibcode:2006AJ....132.2360H. doi:10.1086/508233.
  8. ↑ "RECONS TOP100". THE ONE HUNDRED NEAREST STAR SYSTEMS brought to you by RECONS (Research Consortium On Nearby Stars). 2012. Retrieved 2014-10-20.

Notes

  1. ↑ Weighted parallax based on parallaxes from Henry et al. (1997) and Henry et al. (2006).

External links