HD 30177
HD 30177 is an 8th magnitude star located approximately 182 light-years (56 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 the Sun. This star system contains two known extrasolar planets.
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Dorado |
| Right ascension | 04h 41m 54.37378s[1] |
| Declination | −58° 01′ 14.7277″[1] |
| Apparent magnitude (V) | 8.41 |
| Characteristics | |
| Spectral type | G8V |
| Astrometry | |
| Radial velocity (Rv) | 62.63±0.12[1] km/s |
| Proper motion (μ) | RA: 66.303±0.023 mas/yr[1] Dec.: −11.795±0.024 mas/yr[1] |
| Parallax (π) | 18.0190 ± 0.0195 mas[1] |
| Distance | 181.0 ± 0.2 ly (55.50 ± 0.06 pc) |
| Absolute magnitude (MV) | 4.72 |
| Details[2] | |
| Mass | 1.053±0.023 M☉ |
| Radius | 1.54±0.03 R☉[3] 1.019±0.034[2] R☉ |
| Luminosity | 1.04 ± 0.01[3] L☉ |
| Surface gravity (log g) | 4.417±0.034 cgs |
| Temperature | 5,607±47 K |
| Metallicity [Fe/H] | 0.39±0.05 dex |
| Rotation | ~45 d |
| Age | 4.8±1.5 Gyr[3] 2.525±1.954[2] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
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.[5][6] A second massive gas giant planet was later discovered in an approximately 32 year orbit.[7] In 2022, the inclination and true mass of both planets were measured via astrometry.[8]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (years) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 8.403+1.241 −0.489 MJ |
3.604+0.135 −0.147 |
6.884+0.014 −0.012 |
0.207+0.012 −0.017 |
85.393+14.354 −18.742° |
— |
| c | 6.150+1.308 −0.341 MJ |
10.258+0.535 −0.480 |
33.088+1.596 −1.207 |
0.039+0.005 −0.013 |
98.016+16.025 −24.235° |
— |
See also
References
- Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- Barbato, D.; et al. (August 2018). "Exploring the realm of scaled solar system analogues with HARPS". Astronomy & Astrophysics. 615: 21. arXiv:1804.08329. Bibcode:2018A&A...615A.175B. doi:10.1051/0004-6361/201832791. S2CID 119099721. A175.
- 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.
- "HD 30177". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-08-22.
- 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.
- 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.
- Feng, Fabo; Butler, R. Paul; et al. (August 2022). "3D Selection of 167 Substellar Companions to Nearby Stars". The Astrophysical Journal Supplement Series. 262 (21): 21. arXiv:2208.12720. Bibcode:2022ApJS..262...21F. doi:10.3847/1538-4365/ac7e57. S2CID 251864022.
External links
- "Notes for star HD 30177". The Extrasolar Planets Encyclopaedia. Retrieved 2008-08-29.
