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]

HD 189567
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]
Distance58.49 ± 0.03 ly
(17.932 ± 0.008 pc)
Absolute magnitude (MV)4.75[3]
Details[3]
Mass0.83±0.01 M☉
Luminosity (bolometric)2.11 L☉
Surface gravity (log g)4.41±0.01 cgs
Temperature5726±15 K
Metallicity [Fe/H]−0.24±0.01 dex
Age11.0±0.5 Gyr
Other designations
CD−67 2385, CPD−67 3703, Gaia DR2 6427244702486210816, GJ 776, HD 189567, HIP 98959, HR 7644, SAO 254721, PPM 364390, Ci 20 1180, LFT 1512, LHS 484, LPM 720, LTT 7928, NLTT 48618, PLX 4738, PM 20006-6727, TYC 9098-1638-1, GCRV 12398, GSC 09098-01638, IRAS 20006-6727, 2MASS J20053286-6719156[4]
Database references
SIMBADdata

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]

The HD 189567 planetary system[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
  1. Staff (2 August 2008). "Finding the constellation which contains given sky coordinates". DJM.cc. Retrieved 2 January 2021.
  2. 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.
  3. 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.
  4. "HD 189567 -- High proper-motion Star". SIMBAD. Centre de Données astronomiques de Strasbourg. Retrieved 2 January 2021.
  5. "HD 189567".
  6. "G stars within 100 light-years". www.solstation.com. Retrieved 2020-12-16.
  7. 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.
  8. 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.
  9. 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].
  10. "The Habitable Exoplanets Catalog - Planetary Habitability Laboratory @ UPR Arecibo". phl.upr.edu. Retrieved 2020-12-16.
  11. "The Extrasolar Planet Encyclopaedia — HD 189567 b". exoplanet.eu. Retrieved 2020-12-16.
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