Gliese 754

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GJ 754
Observation data
Epoch J2000      Equinox J2000
Constellation Telescopium
Right ascension 19h 20m 47.955s [1]
Declination −45° 33′ 28.33″ [1]
Characteristics
Spectral type M4.5V[1]
Database references
SIMBAD data

Gliese 754 is a red dwarf star of spectral type M4.5V in the constellation Telescopium.[1] It has an apparent magnitude of 12.23 and is around 19.3 light-years distant.[1] It is one of the hundred closest stars to our Solar System. Calculations of its orbit around the Milky Way showed that it was eccentric, and indicate that it might be a thick disk object.[2]

Distance[edit]

Gliese 754 distance estimates

Source Parallax, mas Distance, pc Distance, ly Distance, Pm Ref.
Woolley et al. (1970) 175 ± 8 5.71+0.27
−0.25
18.6+0.9
−0.8
176.3+8.4
−7.7
[3]
Gliese & Jahreiß (1991) 175.7 ± 8.4 5.69+0.29
−0.26
18.6+0.9
−0.8
175.6+8.8
−8
[4]
van Altena et al. (1995) 175.2 ± 10.1 5.71+0.35
−0.31
18.6+1.1
−1
176.1+10.8
−9.6
[5]
Jao et al. (2005) 169.03 ± 1.55 5.92 ± 0.05 19.3 ± 0.18 182.6 ± 1.7 [6]
RECONS TOP100 (2012) 169.17 ± 1.53[nb 1] 5.91 ± 0.05 19.28+0.18
−0.17
182.4+1.7
−1.6
[7]

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

References[edit]

  1. ^ a b c d e "LHS 60 -- High proper-motion Star". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Retrieved 4 July 2014. 
  2. ^ Innanen, K.A.; Flynn, C. (2010). "The Radial Velocity, Space Motion, and Galactic Orbit of GJ 754". Journal of the Royal Astronomical Society of Canada 104 (6): 223–24. Bibcode:2010JRASC.104..223I. 
  3. ^ Woolley R.; Epps E. A.; Penston M. J.; Pocock S. B. (1970). "Woolley 754". Catalogue of stars within 25 parsecs of the Sun. 
  4. ^ Gliese, W. and Jahreiß, H. (1991). "Gl 754". Preliminary Version of the Third Catalogue of Nearby Stars. 
  5. ^ Van Altena W. F., Lee J. T., Hoffleit E. D. (1995). "GCTP 4505". The General Catalogue of Trigonometric Stellar Parallaxes (Fourth ed.). 
  6. ^ Jao, Wei-Chun; Henry, Todd J.; Subasavage, John P.; Brown, Misty A.; Ianna, Philip A.; Bartlett, Jennifer L.; Costa, Edgardo; Méndez, René A. (2005). "The Solar Neighborhood. XIII. Parallax Results from the CTIOPI 0.9 Meter Program: Stars with mu >= 1.0" yr-1 (MOTION Sample)". The Astronomical Journal 129 (4): 1954–1967. arXiv:astro-ph/0502167. Bibcode:2005AJ....129.1954J. doi:10.1086/428489.  edit
  7. ^ "RECONS TOP100". THE ONE HUNDRED NEAREST STAR SYSTEMS brought to you by RECONS (Research Consortium On Nearby Stars). 2012. 

Notes[edit]

  1. ^ Weighted parallax based on parallaxes from van Altena et al. (1995) and Jao et al. (2005).