HIP 5158

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HIP 5158
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Cetus
Right ascension 01h 06m 02.05s[1]
Declination –22° 27′ 11.3″[1]
Apparent magnitude (V) 10.21
Characteristics
Spectral type K5V
Apparent magnitude (B) 11.29
B−V color index 1.08
Astrometry
Proper motion (μ) RA: 202.62 ± 2.37[1] mas/yr
Dec.: –106.84 ± 1.27[1] mas/yr
Parallax (π) 24.28 ± 2.14[1] mas
Distance 130 ± 10 ly
(41 ± 4 pc)
Absolute magnitude (MV) 6.95
Details
Mass 0.780 ± 0.021[2] M
Radius 0.71 ± 0.12 R
Luminosity 0.11[2] L
Surface gravity (log g) 4.37 ± 0.20[2] cgs
Temperature 4962 ± 89[2] K
Metallicity [Fe/H] = 0.10 ± 0.07[2]
Rotation 42.3 days[2]
Age <6[2] years
Rotation 1.57[2]
Other designations
CD–23°395, LTT 617, NLTT 3632, PPM 243575, SAO 166798
Database references
SIMBAD data
Exoplanet Archive data
Extrasolar Planets
Encyclopaedia
data

HIP 5158 is a 10th magnitude K-type main sequence star located approximately 130 light years away in the constellation Cetus. This star is smaller, cooler, fainter, and less massive than our Sun, but it is more metal rich. In 2009, a gas giant planet was found in orbit around the star. There is a quadratic drift in the radial velocities that may indicate the presence of an additional outer planet in the system.[2]

The HIP 5158 planetary system[2]
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity Inclination Radius
b ≥1.42 MJ 0.89 345.72 ± 5.37 0.52 ± 0.08
c ≥15.04 MJ 7.7 9018 ± 3181 0.14 ± 0.1

See also[edit]

References[edit]

Coordinates: Sky map 01h 06m 02.0482s, −22° 27′ 11.350″