G 161-71

G 161-71
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Hydra
Right ascension 09h 44m 54.224s
Declination −12° 20′ 54.43″
Characteristics
Spectral type M5
Astrometry
Distance20.2±2.6[1] ly
(6.2±0.8[1] pc)
Other designations
G 161-71
NLTT 22503
2MASS J09445422-1220544
Database references
SIMBADdata

G 161-71 is a red dwarf star, located in constellation Hydra at 6.2 parsecs (20.2 light-years) from Earth.[1]

Distance

G 161-71 distance estimates

Source Parallax, mas Distance, pc Distance, ly Distance, Pm Ref.
Reid et al. (2002) 6.2±0.8 20.2±2.6 191.3±24.7 [1]
Scholz et al. (2005) ~ 6.9 ~ 22.5 ~ 212.9 [2]
Kirkpatrick et al. (2012) ~ 153[nb 1] ~ 6.5 ~ 21.3 ~ 201.7 [3]

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

References

  1. ↑ 1.0 1.1 1.2 1.3 Reid, I. Neill; Kilkenny, D.; Cruz, K. L. (2002). "Meeting the Cool Neighbors. II. Photometry of Southern NLTT Stars". The Astronomical Journal 123 (5): 2822–2827. arXiv:astro-ph/0202460. Bibcode:2002AJ....123.2822R. doi:10.1086/339700.
  2. ↑ Scholz, R.-D.; Meusinger, H.; Jahreiß, H. (2005). "Search for nearby stars among proper motion stars selected by optical-to-infrared photometry. III. Spectroscopic distances of 322 NLTT stars". Astronomy and Astrophysics 442 (1): 211–227. arXiv:astro-ph/0507284. Bibcode:2005A&A...442..211S. doi:10.1051/0004-6361:20053004. Table1.dat.
  3. ↑ Kirkpatrick, J. D.; Gelino, C. R.; Cushing, M. C.; Mace, G. N.; Griffith, R. L.; Skrutskie, M. F.; Marsh, K. A.; Wright, E. L.; Eisenhardt, P. R.; McLean, I. S.; Mainzer, A. K.; Burgasser, A. J.; Tinney, C. G.; Parker, S.; Salter, G. (2012). "Further Defining Spectral Type "Y" and Exploring the Low-mass End of the Field Brown Dwarf Mass Function". The Astrophysical Journal 753 (2): 156. arXiv:1205.2122. Bibcode:2012ApJ...753..156K. doi:10.1088/0004-637X/753/2/156.

Notes

  1. ↑ Averaged estimate derived from distances taken from Reid et al. (2003) (7.1 pc) and Riaz et al. (2006) (6 pc). Note: Kirkpatrick et al. (2012) says that 7.1 pc estimate is from Reid et al. (2007), but really it is from Reid et al. (2003), and LP 71-82 was not mentioned in Reid et al. (2007) at all.