Gliese 853
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| Gliese 853 A | |
| Stellar characteristics | |
|---|---|
| Constellation | Grus |
| Right ascension (Epoch J2000) | 22h 18m 15.60s |
| Declination (Epoch J2000) | -53° 37' 37.50" |
| Spectral type | G1-3 V |
| Distance from Sol | 44.4 ly |
| Other designations | Gl 853 A, Hip 110109, HD 211415, CD-54 9222, SAO 247400, LHS 3790, LTT 8943, LFT 1702, LPM 848, HDO 298 A. |
| Gliese 853 B | |
| Stellar characteristics | |
|---|---|
| Constellation | Grus |
| Right ascension (Epoch J2000) | 22h 18m 15.60s |
| Declination (Epoch J2000) | -53° 37' 37.50" |
| Spectral type | M V |
| Distance from Sol | 44.4 ly |
The Gliese 853 binary system is located about 44.4 light-years from Sol. It lies in the southern part of the constellation Grus, the Crane.
Stars A and B had a separation exceeding 31 AUs (2.3") in 1900 and 41 AUs (3") in 1980[1]. According to one reference, they may move around each other at an average distance of about 46 AUs, a semi-major axis of a= 3.4"[2][3].
Gliese 853 A
Gliese 853 A is a yellow-orange main sequence dwarf star of spectral and luminosity type G1-3 V. Possibly a little cooler than Sol, the star probably has a mass similar to Sol's, around 96 percent of its diameter[4], and nearly 1.09 times its luminosity. It may be about 49 to 54 percent as enriched as Sol with elements heavier than hydrogen ("metallicity"), based on its abundance of iron[5][6]. Based on its chromospheric activity, the star may be young than than Sol at around 3.3 billion years of age[5].
An Earth-type planet could have liquid water in a stable orbit centered around 1.04 AU from Star A -- just beyond the orbital distance of Earth. Its orbital period would be a little longer than an Earth year, depending on the star's mass.
Gliese 853 B
Gliese 853 B is a red main sequence dwarf star of spectral and luminosity type M V. The star may only have less than half Sol's mass, 56 percent of its diameter[4], and a visual luminosity less than 1.8 percent of Sol's.
An Earth-type planet could have liquid water in a stable orbit centered around 0.013 AU from Star B -- well within the orbital distance of Mercury in the Solar System. Such a planet would have an orbital period of around 30-some days and would likely be tidally locked with respect to Star B.
(Data from SolStation.com)
Notes
- ↑ (HR 8501 = WDS 22183-5338, Washington Visual Double Star Catalog, 1996.0)
- ↑ (Poveda el al, 1994, pp. 80-81)
- ↑ (O.J. Eggen, 1956, pp. 410 and 427)
- ↑ 4.0 4.1 (Johnson and Wright, 1983, page 701)
- ↑ 5.0 5.1 (Margaret C. Turnbull, 2004)
- ↑ (Misha Haywood, 2001)
