HD 5608

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HD 5608
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Andromeda
Right ascension 00h 58m 14.219s[1]
Declination +33° 57′ 03.18″[1]
Apparent magnitude (V) +5.99
Characteristics
Spectral type K0 IV
Astrometry
Proper motion (μ) RA: 34.98 ± 0.40[1] mas/yr
Dec.: -71.87 ± 0.20[1] mas/yr
Parallax (π) 17.74 ± 0.40[1] mas
Distance 184 ± 4 ly
(56 ± 1 pc)
Details
Mass 1.55 (1.32–1.74) M
Radius 5.5 (5.1–5.9) R
Luminosity 15.1 L
Surface gravity (log g) 3.03 ± 0.08 cgs
Temperature 4854 ± 25 K
Metallicity +0.06 ± 0.04
Age ? years
Other designations
HIP 4552, HR 275
Database references
SIMBAD data
Exoplanet Archive data
Extrasolar Planets
Encyclopaedia
data


HD 5608 is a K-type subgiant star with one known planet, HD 5608 b.[2]


The HD 5608 planetary system[2]
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity Inclination Radius
b >1.4 MJ 1.9 792.6 ± 7.7 0.190 ± 0.061

There is a linear drift in the results. This suggests a larger companion - perhaps a brown dwarf (over 75 MJ) at 50 AU.[2]

References[edit]

  1. ^ a b c d e van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry
  2. ^ a b c Sato, Bun'ei et al. (2012). "Substellar Companions to Seven Evolved Intermediate-Mass Stars". Publications of the Astronomical Society of Japan 64 (6). 135. arXiv:1207.3141. Bibcode:2012PASJ...64..135S. doi:10.1093/pasj/64.6.135.