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]
| 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 |
| Distance | 181 ± 5 ly (55 ± 2 pc) |
| Details | |
| Mass | 1.335 ± 0.03 M☉ |
| Radius | ? R☉ |
| Luminosity | 3.5± 0.3 L☉ |
| Surface gravity (log g) | 4.26 ± 0.13 cgs |
| Temperature | 6489 ± 77 K |
| Metallicity | 0.28 ± 0.06 |
| Age | 1.05 ± 0.64 × 109 years |
| Other designations | |
HIP 58263, SAO 157002, BD-11°3211 | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
| 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.
| 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 | — | — |
gollark: IIRC the Old Testament actually contains recordings of commands by god to kill specific groups.
gollark: Not all religions say "be peaceful and not mean to each other", though?
gollark: I mean, if you believe Religion 1 and believe that everyone who believes Religion 2 will go to hell and suffer forever, then you obviously don't want Religion 2 to spread.
gollark: They're pretty rational if you actually believe your religion is true, though.
gollark: Looking at religious conflicts probably doesn't require knowing about all the deep details of the religions involved, because people do tribalism and probably do not meaningfully care about the actual underlying point.
References
- 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.
- 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.
- The preprint listed this as "roughly the mass of Neptune" but it is much more massive than that.
- "hd_103774_b".
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