Gliese 784

GJ 784
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Telescopium
Right ascension 20h 13m 53.39765 s[1]
Declination −45° 09′ 50.4723″[1]
Apparent magnitude (V) 7.966
Characteristics
Spectral type M0V
Astrometry
Radial velocity (Rv)-35.10 ± 0.2 km/s
Parallax (π)161.34 ± 1.00[1] mas
Distance20.2 ± 0.1 ly
(6.20 ± 0.04 pc)
Other designations
CD -45 13677[2][3]
HD 191849[4]
Ci 20 1196[5]
SAO 230110[6]
LPM 730
LTT 7999
LFT 1532
PM 20103-4519
PPM 325963
NLTT 48880[7]
LHS 3531[8]
GJ 784[9]
PLX 4794[10]
HIP 99701[11]
TYC 8392-2673-1[12][13]
2MASS J20135335-4509506
Database references
SIMBADdata

Gliese 784 is a red dwarf star of spectral type M0V, located in constellation Telescopium at 20.2 light-years from Earth.[1]

History of observations

Gliese 784 is known at least from 1900, when it was included in Cordoba Durchmusterung (CD) catalogue by John M. Thome. The corresponding designation is CD -45 13677.[2][3]

Distance

Gliese 784 distance estimates

Source Parallax, mas Distance, pc Distance, ly Distance, Pm Ref.
Woolley et al. (1970) 164±5 6.1+0.19
−0.18		 19.9±0.6 188.2+5.9
−5.6		 [14]
Gliese & Jahreiß (1991) 163.9±8.5 6.1+0.33
−0.3		 19.9+1.1
−1		 188.3+10.3
−9.3		 [9]
van Altena et al. (1995) 161.8±8.1 6.18+0.33
−0.29		 20.2+1.1
−1		 190.7+10.1
−9.1		 [10]
Perryman et al. (1997) (Hipparcos) 161.17±1.08 6.2±0.04 20.24+0.14
−0.13		 191.5±1.3 [11]
Perryman et al. (1997) (Tycho) (absents) [12]
van Leeuwen (2007) 161.34±1.00 6.2±0.04 20.22+0.13
−0.12		 191.3±1.2 [1]
RECONS TOP100 (2012) 161.35±0.99[nb 1] 6.2±0.04 20.21±0.12 191.2±1.2 [15]

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 1.4 van Leeuwen F. (2007). "HIP 99701". Validation of the new Hipparcos reduction.
  2. ↑ 2.0 2.1 Thome, J. M. (1900). "Cordoba Durchmusterung declination -42 to -52.". Resultados del Observatorio Nacional Argentino 18: 1–502. Bibcode:1900RNAO...18....1T. (See also 1900RNAO...18....1., 1900RNAO...18.....T). Page 206 (CD-45 13677)
  3. ↑ 3.0 3.1 Thome, John Macon (1892–1932). "CD -45 13677". Cordoba Durchmusterung.
  4. ↑ Cannon, Annie Jump et al. (1918–1924). "HD 191849". Henry Draper Catalogue and Extension.
  5. ↑ Porter, J. G.; Yowell, E. J.; Smith, E. S. (1930). "A catalogue of 1474 stars with proper motion exceeding four-tenths year.". Publications of the Cincinnati Observatory 20: 1–32. Bibcode:1930PCinO..20....1P. Page 26 (Ci 20 1196).
  6. ↑ SAO Staff (1966). "SAO 230110". SAO Star Catalog J2000.
  7. ↑ Luyten, Willem Jacob (1979). "NLTT 48880". NLTT Catalogue.
  8. ↑ Luyten, Willem Jacob (1979). "LHS 3531". LHS Catalogue, 2nd Edition.
  9. ↑ 9.0 9.1 Gliese, W. and Jahreiß, H. (1991). "Gl 784". Preliminary Version of the Third Catalogue of Nearby Stars.
  10. ↑ 10.0 10.1 Van Altena W. F., Lee J. T., Hoffleit E. D. (1995). "GCTP 4794". The General Catalogue of Trigonometric Stellar Parallaxes (Fourth ed.).
  11. ↑ 11.0 11.1 Perryman et al. (1997). "HIP 99701". The Hipparcos and Tycho Catalogues.
  12. ↑ 12.0 12.1 Perryman et al. (1997). "HIP 99701". The Hipparcos and Tycho Catalogues.
  13. ↑ Hog et al. (2000). "TYC 8392-2673-1". The Tycho-2 Catalogue.
  14. ↑ Woolley R.; Epps E. A.; Penston M. J.; Pocock S. B. (1970). "Woolley 784". Catalogue of stars within 25 parsecs of the Sun.
  15. ↑ "RECONS TOP100". THE ONE HUNDRED NEAREST STAR SYSTEMS brought to you by RECONS (Research Consortium On Nearby Stars). 2012.

Notes

  1. ↑ Weighted parallax based on parallaxes from van Altena et al. (1995) and van Leeuwen (2007).