HD 5388 b

HD 5388 b
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]
Distance175 ± 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
Database references
Extrasolar Planets
Encyclopaedia
data
SIMBADdata
Exoplanet Archivedata
Open Exoplanet Cataloguedata

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]

See also

References

Coordinates: 00h 55m 11.8897s, −47° 24′ 21.475″

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