HD 30177
Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Dorado |
Right ascension | 04h 41m 54.373s[1] |
Declination | –58° 01′ 14.72″[1] |
Apparent magnitude (V) | 8.41 |
Characteristics | |
Spectral type | G8V |
Astrometry | |
Proper motion (μ) | RA: 66.15 ± 0.74[1] mas/yr Dec.: -11.45 ± 0.77[1] mas/yr |
Parallax (π) | 18.93 ± 0.63[1] mas |
Distance | 172 ± 6 ly (53 ± 2 pc) |
Absolute magnitude (MV) | 4.72 |
Details | |
Mass | 1.09 ± 0.02[2] M☉ |
Radius | 1.54 ± 0.03[2] R☉ |
Luminosity | 1.04 ± 0.01[2] L☉ |
Surface gravity (log g) | 4.38 ± 0.03[2] cgs |
Temperature | 5607 ± 47[2] K |
Age | 4.8 ± 1.5[2] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
HD 30177 is an 8th magnitude star located approximately 172 light-years (53 parsecs) away in the constellation Dorado. The star is a yellow dwarf, a type of yellow star that fuses hydrogen in its core. Since if this star is a late G-type, it is cooler and less massive than the Sun, but larger in radius. It is 1.8 times older than our Sun. This star system contains two known extrasolar planets.
Planetary system
The Anglo-Australian Planet Search team announced the discovery of HD 30177 b, which has a minimum mass 8 times that of Jupiter, on June 13, 2002. The scientific paper describing the discovery was published in The Astrophysical Journal in 2003.[3][4] A second massive gas giant planet was later discovered in an approximately 32 year orbit.[5]
Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b | ±0.10 >8.08 MJ | ±0.01 3.58 | 524.4±9.8 2 | ±0.012 0.184 | — | — |
c | ±3.1 >7.6 MJ | ±1.04 9.89 | 613±1837 11 | ±0.14 0.22 | — | — |
See also
References
- 1 2 3 4 5 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
- 1 2 3 4 5 6 Bonfanti, A.; et al. (2015). "Revising the ages of planet-hosting stars". Astronomy and Astrophysics. 575. A18. arXiv:1411.4302. Bibcode:2015A&A...575A..18B. doi:10.1051/0004-6361/201424951.
- ↑ Tinney, Chris (2007-09-07). "AAPS Discovered Planets". Anglo-Australian Planet Search. University of New South Wales. Retrieved 2018-04-17.
- ↑ Tinney, C. G.; et al. (2003). "Four New Planets Orbiting Metal-enriched Stars". The Astrophysical Journal. 587 (1): 423–428. arXiv:astro-ph/0207128. Bibcode:2003ApJ...587..423T. doi:10.1086/368068.
- 1 2 Wittenmyer, Robert A.; et al. (2017). "The Anglo-Australian Planet Search. XXV. A Candidate Massive Saturn Analog Orbiting HD 30177". The Astronomical Journal. 153 (4). 167. arXiv:1612.02072. Bibcode:2017AJ....153..167W. doi:10.3847/1538-3881/aa5f17.
External links
- "Notes for star HD 30177". The Extrasolar Planets Encyclopaedia. Retrieved 2008-08-29.
Coordinates: