HD 5388 b
From Infogalactic: the planetary knowledge core
Exoplanet | List of exoplanets | |
---|---|---|
Parent star | ||
Star | HD 5388 | |
Constellation | Phoenix | |
Right ascension | (α) | 00h 55m 11.89s[1] |
Declination | (δ) | –47° 24′ 21.5″[1] |
Apparent magnitude | (mV) | 6.73[2] |
Distance | 175 ± 6[1] ly (54 ± 2[1] pc) |
|
Spectral type | F6V[2] | |
Orbital elements | ||
Semi-major axis | (a) | 1.76[2] AU (264 Gm) |
32.5 mas | ||
Periastron | (q) | 1.06 AU (158 Gm) |
Apastron | (Q) | 2.46 AU (369 Gm) |
Eccentricity | (e) | 0.40 ± 0.02[2] |
Orbital period | (P) | 777 ± 4[2] d (2.13 y) |
Orbital speed | (υ) | 24.7 km/s |
Argument of periastron |
(ω) | 324 ± 4[2]° |
Time of periastron | (T0) | 2,454,570 ± 9[2] JD |
Semi-amplitude | (K) | 41.7 ± 1.6[2] m/s |
Physical characteristics | ||
Mass | (m) | 69[3] MJ |
Discovery information | ||
Discovery date | October 19, 2009 | |
Discoverer(s) | Santos et al. | |
Discovery method | radial velocity (HARPS) | |
Discovery site | La Silla Observatory | |
Discovery status | Published[2] | |
Other designations | ||
HIP 4311 b
|
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Database references | ||
Extrasolar Planets Encyclopaedia |
data | |
SIMBAD | data | |
Exoplanet Archive | data | |
Open Exoplanet Catalogue | data |
HD 5388 b (also known as HIP 4311 b) was thought to be an extrasolar planet orbiting the F-type main sequence star HD 5388, located approximately 175 light years away in the constellation Phoenix. It takes over two years to orbit the star at a semimajor axis of 1.76 AU with an eccentricity of 0.40.[2] It was announced on October 19, 2009, together with 29 other planets.
This planet has been disproved and shown to be a brown dwarf.[3]