HD 103774

HD 103774 is a young yellow-white main-sequence star of apparent magnitude 7.12 that is 181 ± 5 light-years distant from Earth. It is 1.335 ± 0.03 times as massive and 3.5 ± 0.3 as luminous as the Sun.[2]

HD 103774
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Corvus
Right ascension  11h 56m 56s
Declination −12° 6′ 28″
Apparent magnitude (V) 7.12 ± 0.01
Characteristics
Spectral type F6 V[1]
Astrometry
Parallax (π)18.03 ± 0.52 mas
Distance181 ± 5 ly
(55 ± 2 pc)
Details
Mass1.335 ± 0.03 M☉
Radius? R☉
Luminosity3.5± 0.3 L☉
Surface gravity (log g)4.26 ± 0.13 cgs
Temperature6489 ± 77 K
Metallicity0.28 ± 0.06
Age1.05 ± 0.64 × 109 years
Other designations
HIP 58263, SAO 157002, BD-11°3211
Database references
SIMBADdata
Exoplanet Archivedata
Extrasolar Planets
Encyclopaedia		data

Planetary system

From 2003 to 2012, the star was under observation from HARPS.

In 2012, a hot Saturn-mass[3] planet was deduced by radial velocity. This result was published in January 2013.

Also probable is a dust field, with grains of 12 micrometres.

The HD 103774 planetary system[4][2]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b >0.367 ± 0.022 MJ 0.07 ± 0.001 5.8881 ± 0.0005 0.09 ± 0.04 — —

References
  1. Houk, N.; Swift, C. (1999), "Michigan catalogue of two-dimensional spectral types for the HD Stars", Michigan Spectral Survey, Ann Arbor, Michigan: Department of Astronomy, University of Michigan, 5, Bibcode:1999MSS...C05....0H.
  2. Lo Curto, G.; Mayor, M.; Benz, W.; Bouchy, F.; Hébrard, G.; Lovis, C.; Moutou, C.; Naef, D.; Pepe, F.; Queloz, D.; Santos, N. C.; Segransan, D.; Udry, S. (2013). "The HARPS search for southern extrasolar planets: XXXVI. New multi-planet systems in the HARPS volume limited sample: a super-Earth and a Neptune in the habitable zone". Astronomy & Astrophysics. 551: 7. arXiv:1301.2741. Bibcode:2013A&A...551A..59L. doi:10.1051/0004-6361/201220415. A59.
  3. The preprint listed this as "roughly the mass of Neptune" but it is much more massive than that.
  4. "hd_103774_b".


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