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] |
| Rotation | 39.2±6.3 d[3] |
| Other designations | |
| 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
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.[4]
| 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 | 5.1182 | 7049.0 | 0.218 | — | — |
See also
- List of star systems within 25–30 light-years
- Gliese 317
- Gliese 649
- Gliese 581
- List of extrasolar planets
References
- 1 2 3 4 5 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 - 1 2 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.
- ↑ Suárez Mascareño, A.; et al. (September 2015), "Rotation periods of late-type dwarf stars from time series high-resolution spectroscopy of chromospheric indicators", Monthly Notices of the Royal Astronomical Society, 452 (3): 2745−2756, arXiv:1506.08039, Bibcode:2015MNRAS.452.2745S, doi:10.1093/mnras/stv1441.
- 1 2 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
- "Gj 849". The Extrasolar Planets Encyclopedia.
- "BD-05 5715 / Gl 849". Solstation.
- "Image: Gliese 849". Aladin Previewer.
Coordinates: 
22h 09m 40.3460s, −4° 38′ 26.624″
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