Gliese 849

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Gliese 849
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Aquarius
Right ascension 22h 9m 40.343s[1]
Declination –4° 38′ 26.62″[1]
Apparent magnitude (V) 10.42
Characteristics
Spectral type M3.5V
U−B color index 1.13
B−V color index 1.51
V−R color index 1.11
R−I color index 1.41
Astrometry
Radial velocity (Rv) −12 ± 5 km/s
Proper motion (μ) RA: 1130.27 ± 2.56[1] mas/yr
Dec.: -19.27 ± 1.33[1] mas/yr
Parallax (π) 109.94 ± 2.07[1] mas
Distance 29.7 ± 0.6 ly
(9.1 ± 0.2 pc)
Absolute magnitude (MV) 10.70
Details
Mass 0.36 M
Radius 0.52 ± 0.07 R
Luminosity 0.029 L
Surface gravity (log g) 4.66 cgs
Temperature 3,601 ± 19[2] K
Metallicity +0.31 ± 0.17[2]
Other designations
BD-05 5715, GCRV 13921, HIP 109388, LFT 1689, LHS 517, LPM 814, LTT 8889, NLTT 53078
Database references
SIMBAD data
Exoplanet Archive data
ARICNS data
Planet
Gliese 849b data
Data sources:
Hipparcos Catalogue,
CCDM (2002),
Bright Star Catalogue (5th rev. ed.)

Gliese 849 is a red dwarf star approximately 29 light years away in the constellation of Aquarius.

Planetary system[edit]

In August 2006, a first long-period Jupiter-like planet was found orbiting the red dwarf at a distance of 2.35 astronomical units, taking 1890 days to orbit with a low eccentricity.[3]

The Gliese 849 system[3]
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity Inclination Radius
b >0.82 MJ 2.35 1890 ± 130 0.06 ± 0.09
c 0.77 MJ 7049.0 0.218

See also[edit]

References[edit]

  1. ^ a b c d e van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry
  2. ^ a b Rojas-Ayala, Bárbara et al. (April 2012). "Metallicity and Temperature Indicators in M Dwarf K-band Spectra: Testing New and Updated Calibrations with Observations of 133 Solar Neighborhood M Dwarfs". The Astrophysical Journal 748 (2): 93. arXiv:1112.4567. Bibcode:2012ApJ...748...93R. doi:10.1088/0004-637X/748/2/93.  See table 3.
  3. ^ a b Butler, R. Paul et al. (2006). "A Long-Period Jupiter-Mass Planet Orbiting the Nearby M Dwarf GJ 849". The Astronomical Society of the Pacific 118: 1685–1689. arXiv:astro-ph/0610179. Bibcode:2006PASP..118.1685B. doi:10.1086/510500. 

External links[edit]

Coordinates: Sky map 22h 09m 40.3460s, −4° 38′ 26.624″