HD 189567
HD 189567 is a G3V star located 58.5 light years away, in the constellation of Pavo.[5] The star HD 189567 is also known as Gliese 776, CD-67 2385, and HR 7644.[6]
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Pavo[1] |
Right ascension | 20h 05m 32.76549s[2] |
Declination | −67° 19′ 15.2261″[2] |
Apparent magnitude (V) | 6.07[3] |
Characteristics | |
Evolutionary stage | Main sequence |
Spectral type | G3V[3] |
Apparent magnitude (U) | 6.79[4] |
Apparent magnitude (B) | 6.71[3] |
Apparent magnitude (V) | 6.07[3] |
Apparent magnitude (J) | 4.97[4] |
Apparent magnitude (H) | 4.724±0.076[4] |
Apparent magnitude (K) | 4.511±0.026[4] |
Astrometry | |
Radial velocity (Rv) | −10.548±0.0003[4] km/s |
Proper motion (μ) | RA: 845.252±0.016 mas/yr[2] Dec.: −674.213±0.024 mas/yr[2] |
Parallax (π) | 55.7654 ± 0.0245 mas[2] |
Distance | 58.49 ± 0.03 ly (17.932 ± 0.008 pc) |
Absolute magnitude (MV) | 4.75[3] |
Details[3] | |
Mass | 0.83±0.01 M☉ |
Luminosity (bolometric) | 2.11 L☉ |
Surface gravity (log g) | 4.41±0.01 cgs |
Temperature | 5726±15 K |
Metallicity [Fe/H] | −0.24±0.01 dex |
Age | 11.0±0.5 Gyr |
Other designations | |
Database references | |
SIMBAD | data |
The star is moderately depleted in heavy elements, having 55% of the solar abundance of iron,[7] but is less depleted in oxygen, having 80% of its solar abundance.[8]
Planetary system
One exoplanet was discovered around the star in 2011, HD 189567 b.[9] This exoplanet has an estimated minimum mass of 8.5 Earth masses, which means that it is most likely a mini-Neptune.[10] It has an orbital period of 14.3 days, placing it well interior to the habitable zone of the star system.[11] The planet's existence was confirmed in 2021, along with the discovery of a second planet, HD 189567 c.[3]
Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b | ≥8.5±0.6 M🜨 | 0.111±0.002 | 14.288±0.002 | <0.189 | — | — |
c | ≥7.0±0.9 M🜨 | 0.197±0.003 | 33.688±0.025 | 0.16±0.09 | — | — |
References
- Staff (2 August 2008). "Finding the constellation which contains given sky coordinates". DJM.cc. Retrieved 2 January 2021.
- Vallenari, A.; et al. (Gaia Collaboration) (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. arXiv:2208.00211. doi:10.1051/0004-6361/202243940. Gaia DR3 record for this source at VizieR.
- Unger, N.; Ségransan, D.; et al. (2021). "The HARPS search for southern extra-solar planets. XLVI. 12 super-Earths around the solar type stars HD 39194, HD 93385, HD 96700, HD 154088, and HD 189567". Astronomy & Astrophysics. 654: A104. arXiv:2108.10198. Bibcode:2021A&A...654A.104U. doi:10.1051/0004-6361/202141351.
- "HD 189567 -- High proper-motion Star". SIMBAD. Centre de Données astronomiques de Strasbourg. Retrieved 2 January 2021.
- "HD 189567".
- "G stars within 100 light-years". www.solstation.com. Retrieved 2020-12-16.
- Giribaldi, R. E.; Porto De Mello, G. F.; Lorenzo-Oliveira, D.; Amôres, E. B.; Ubaldo-Melo, M. L. (2019). "Faint solar analogues at the limit of no reddening". Astronomy & Astrophysics. 629: A33. arXiv:1907.00445. doi:10.1051/0004-6361/201935901. S2CID 195766778.
- Nissen, P. E.; Christensen-Dalsgaard, J.; Mosumgaard, J. R.; Silva Aguirre, V.; Spitoni, E.; Verma, K. (2020). "High-precision abundances of elements in solar-type stars". Astronomy & Astrophysics. 640: A81. arXiv:2006.06013. doi:10.1051/0004-6361/202038300. S2CID 219573423.
- Mayor, M.; et al. (12 September 2011). "The HARPS search for southern extra-solar planets XXXIV. Occurrence, mass distribution and orbital properties of super-Earths and Neptune-mass planets". arXiv:1109.2497 [astro-ph].
- "The Habitable Exoplanets Catalog - Planetary Habitability Laboratory @ UPR Arecibo". phl.upr.edu. Retrieved 2020-12-16.
- "The Extrasolar Planet Encyclopaedia — HD 189567 b". exoplanet.eu. Retrieved 2020-12-16.
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