BD -5°1123

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Places in Fenspace
BD -5°1123 A
Stellar characteristics
ConstellationEridanus
Right ascension (Epoch J2000)05h 00m 49.0s
Declination (Epoch J2000)-05° 45' 13.2"
Spectral typeK3 V
Distance from Sol28.75 ly
Other designationsHR 1614, Gl 183 A, Hip 23311, HD 32147, SAO 131688, LHS 200, LTT 2412, LFT 382, LPM 200.
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Places in Fenspace
BD -5°1123 B
Stellar characteristics
ConstellationEridanus
Right ascension (Epoch J2000)05h 00m 49.0s
Declination (Epoch J2000)-05° 45' 13.2"
Spectral typeunknown
Distance from Sol28.75 ly
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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

  1. (Feltzing and Holmberg, 2000)
  2. (Olin Jeuck Eggen, 1998 and 1992)
  3. (Graeme H. Smith, 1983)
  4. (Eggen, 1978)
  5. (Johnson and Wright, 1983, page 657)
  6. (Cayrel de Strobel et al, 1991, page 282)
  7. (M. Petit, 1990, page 975 -- Gliese No. 183)
  8. (Neill Reid, 1991, page 1431)
  9. (Olin Jeuck Eggen, 1990)
  10. (Cummings et al, 1999)