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| Observation data Epoch J2000.0 Equinox J2000.0 |
|
|---|---|
| Constellation | Aquarius |
| Right ascension | 22h 9m 40.3460s |
| Declination | –4° 38′ 26.624″ |
| 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: 1134.93 ± 2.75 mas/yr Dec.: −19.71 ± 1.3 mas/yr |
| Parallax (π) | 113.97 ± 2.10 mas |
| Distance | 28.618 ± 0.7 ly (8.774 ± 0.2 pc) |
| Absolute magnitude (MV) | 10.70 |
| Details | |
| Mass | 0.36 M☉ |
| Radius | 0.52 ± 0.07 R☉ |
| Surface gravity (log g) | 4.66 |
| Luminosity | 0.0045 L☉ |
| Temperature | 2,000–3,500 K |
| Other designations | |
| Database references | |
| SIMBAD | 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.
Contents |
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.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity |
|---|---|---|---|---|
| b | >0.82 MJ | 2.35 | 1890 ± 130 | 0.06 ± 0.09 |
See also
References
- Butler 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. doi:, http://www.journals.uchicago.edu/doi/abs/10.1086/510500.web preprint
External links
- "Gj 849". The Extrasolar Planets Encyclopedia.
- "BD-05 5715 / Gl 849". Solstation.
- "Image: Gliese 849". Aladin Previewer.
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