Gliese 784

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

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], GJ 784[4], HD 191849[5], HIP 99701[1], SAO 230110[6], PPM 325963, Ci 20 1196[7], LFT 1532, LHS 3531[8], LPM 730, LTT 7999, NLTT 48880[9], PLX 4794[10], PM 20103-4519, TYC 8392-2673-1[11][12], 2MASS J20135335-4509506
Database references
SIMBADdata

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]

Planetary System

In June 2019 one planet candidate were reported in orbit around Gliese 784. [13]

The Gliese 784 planetary system
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b 9.4+4.6
−4.1 M⊕		 0.059±0.006 6.6592+0.0033
−0.0038		 0.05+0.23
−0.05		 — —

References
  1. Perryman; et al. (1997). "HIP 99701". The Hipparcos and Tycho Catalogues.
  2. 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. Thome, John Macon (1892–1932). "CD -45 13677". Cordoba Durchmusterung.
  4. Gliese, W.; Jahreiß, H. (1991). "Gl 784". Preliminary Version of the Third Catalogue of Nearby Stars.
  5. Cannon, Annie Jump; et al. (1918–1924). "HD 191849". Henry Draper Catalogue and Extension.
  6. SAO Staff (1966). "SAO 230110". SAO Star Catalog J2000.
  7. 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).
  8. Luyten, Willem Jacob (1979). "LHS 3531". LHS Catalogue, 2nd Edition.
  9. Luyten, Willem Jacob (1979). "NLTT 48880". NLTT Catalogue.
  10. Van Altena W. F.; Lee J. T.; Hoffleit E. D. (1995). "GCTP 4794". The General Catalogue of Trigonometric Stellar Parallaxes (Fourth ed.).
  11. Perryman; et al. (1997). "HIP 99701". The Hipparcos and Tycho Catalogues.
  12. Hog; et al. (2000). "TYC 8392-2673-1". The Tycho-2 Catalogue.
  13. Barnes, J. R.; et al. (2019-06-11). "Frequency of planets orbiting M dwarfs in the Solar neighbourhood". arXiv:1906.04644v1 [astro-ph.EP].
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