HD 4308

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HD 4308
Observation data
Epoch J2000      Equinox J2000
Constellation Tucana
Right ascension 00h 44m 39.267s[1]
Declination –65° 38′ 58.28″[1]
Apparent magnitude (V) 6.54[2]
Characteristics
Spectral type G6V[2]
Apparent magnitude (B) ~7.19[2]
Apparent magnitude (V) ~6.54[2]
Apparent magnitude (J) 5.366 ±0.024[2]
Apparent magnitude (H) 5.101 ±0.016[2]
Apparent magnitude (K) 4.945 ±0.020[2]
Astrometry
Radial velocity (Rv) 97.7 ± 5 km/s
Proper motion (μ) RA: 157.49 ± 0.27[1] mas/yr
Dec.: -742.32 ± 0.31[1] mas/yr
Parallax (π) 45.34 ± 0.32[1] mas
Distance 71.9 ± 0.5 ly
(22.1 ± 0.2 pc)
Details
Mass 0.83 M
Radius 0.92 R
Temperature 5597 K
Metallicity -0.31
Other designations
Gliese 31.5, GJ 9028, GC 897, GCRV 50662, HIP 3497, LFT 71, LHS 1139, LPM 40, LTT 416, SAO 248244, 2MASS J00443925-6538581, TYC 8847-598-1, PPM 352003
Database references
SIMBAD data
ARICNS data
Extrasolar Planets
Encyclopaedia
data

HD 4308 is a 6th magnitude star located approximately 72 light years away in the southern constellation of Tucana.[2]

Planetary system[edit]

In 2005, a low-mass planet was found in orbit around this star using the radial velocity method with the HARPS spectrograph. Unusual for a star with planets, HD 4308 has a metallicity lower than that of the Sun.[3]

The HD 4308 system[3]
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity Inclination Radius
b >0.0442 MJ 0.115 15.56 ± 0.02 0.00 ± 0.01

See also[edit]

References[edit]

External links[edit]

  • "HD 4308". Exoplanets. Retrieved 2009-05-23. 

Coordinates: Sky map 00h 44m 39.2677s, −65° 38′ 58.280″