BD -5°1123
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BD -5°1123 A | |
Stellar characteristics | |
---|---|
Constellation | Eridanus |
Right ascension (Epoch J2000) | 05h 00m 49.0s |
Declination (Epoch J2000) | -05° 45' 13.2" |
Spectral type | K3 V |
Distance from Sol | 28.75 ly |
Other designations | HR 1614, Gl 183 A, Hip 23311, HD 32147, SAO 131688, LHS 200, LTT 2412, LFT 382, LPM 200. |
BD -5°1123 B | |
Stellar characteristics | |
---|---|
Constellation | Eridanus |
Right ascension (Epoch J2000) | 05h 00m 49.0s |
Declination (Epoch J2000) | -05° 45' 13.2" |
Spectral type | unknown |
Distance from Sol | 28.75 ly |
This close binary system is located about 28.8 light-years away from our Sol, in the south central edge of the constellation Eridanus, the River. The system may be visible to some Humans without a telescope. This metal-rich system is also the title member of the two-billion-year-old, HR 1614 stellar moving group[1][2][3][4].
BD -5°1123 A
BD -05°1123 is a main-sequence orange-red dwarf star of spectral and luminosity type K3 V. It may have around 84.5 percent of Sol's mass, 81 percent of its diameter[5], and 21 percent of its luminosity. The star appears to be relatively enriched in elements heavier than hydrogen ("metals") because it has 105 percent of Sol's abundance of iron[6]. It's chromospheric activity varies over a period of about six years[7]. According to the Astronomiches Rechen-Institut at Heidelberg's ARICNS, this star has a spectroscopic companion[8][9].
Past radial velocity analysis suggests that giant planets of one tenth to 10 times the mass of Jupiter do not exist within 0.1 to four AUs of Star A[10]. Assuming that the spectroscopic companion B does not preclude a stable inner planetary orbit, the distance from Star A where an Earth-type planet would be "comfortable" with liquid water is centered around only 0.457 AU -- between the orbital distances of Mercury and Venus in the Solar System. An Earth-type in such a water-zone orbit would probably would have a period of around 123 days or a third of an Earth year.
BD -5°1123 B
Beyond knowing that this star exists, due to its effects on Star A, there is no information available on Star B.
(Data from SolStation)
Notes
- ↑ (Feltzing and Holmberg, 2000)
- ↑ (Olin Jeuck Eggen, 1998 and 1992)
- ↑ (Graeme H. Smith, 1983)
- ↑ (Eggen, 1978)
- ↑ (Johnson and Wright, 1983, page 657)
- ↑ (Cayrel de Strobel et al, 1991, page 282)
- ↑ (M. Petit, 1990, page 975 -- Gliese No. 183)
- ↑ (Neill Reid, 1991, page 1431)
- ↑ (Olin Jeuck Eggen, 1990)
- ↑ (Cummings et al, 1999)