HD 189567

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HD 189567
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Pavo[1]
Right ascension 20h 05m 32.7652367983s[2]
Declination −67° 19′ 15.228862402″[2]
Apparent magnitude (V) 6.07[2]
Characteristics
Evolutionary stage Main sequence
Spectral type G2V[2]
Apparent magnitude (U) 6.79[2]
Apparent magnitude (B) 6.71[2]
Apparent magnitude (V) 6.07[2]
Apparent magnitude (J) 4.97[2]
Apparent magnitude (H) 4.724±0.076[2]
Apparent magnitude (K) 4.511±0.026[2]
Astrometry
Radial velocity (Rv)−10.548±0.0003[2] km/s
Proper motion (μ) RA: 845.346[2] mas/yr
Dec.: −674.028[2] mas/yr
Parallax (π)55.8197 ± 0.0381[2] mas
Distance58.43 ± 0.04 ly
(17.91 ± 0.01 pc)
Details[3]
Surface gravity (log g)4.2 cgs
Temperature5656 K
Metallicity [Fe/H]−0.26 dex
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[2]
Database references
SIMBADdata

HD 189567 is a G2V star located 58.4 light years away, in the constellation of Pavo.[4] The star HD 189567 is also known as Gliese 776, CD-67 2385, and HR 7644.[5]

The star is moderately depleted in heavy elements, having 55% of solar abundance of iron,[3] but is less depleted in oxygen, having 80% of its solar abundance.[6]

Planetary system[]

At least one exoplanet has been discovered around the star: HD 189567 b.[7] This exoplanet has an estimated minimum mass of 10 Earth masses, which means that it is most likely a mini-Neptune.[8] It has an orbital period of 14.3 days, placing it well interior to the habitable zone of the star system.[9] The planet existence was confirmed in 2021, along with the discovery of the candidate planet HD 189567 c.[10]

The HD 189567 planetary system[7][citation needed]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
≥10.03±1.04 M⊕ 0.1099±0.0018 14.275±0.005 0.23±0.14 — —
[10] (unconfirmed) ≥7±0.9 M⊕ 0.199±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. ^ Jump up to: a b c d e f g h i j k l m n o "HD 189567 -- High proper-motion Star". SIMBAD. Centre de Données astronomiques de Strasbourg. Retrieved 2 January 2021.
  3. ^ Jump up to: a b 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.
  4. ^ "HD 189567".
  5. ^ "G stars within 100 light-years". www.solstation.com. Retrieved 2020-12-16.
  6. ^ 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.
  7. ^ Jump up to: a b 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].
  8. ^ "The Habitable Exoplanets Catalog - Planetary Habitability Laboratory @ UPR Arecibo". phl.upr.edu. Retrieved 2020-12-16.
  9. ^ "The Extrasolar Planet Encyclopaedia — HD 189567 b". exoplanet.eu. Retrieved 2020-12-16.
  10. ^ Jump up to: a b The HARPS search for southern extra-solar planets XLVI: 12 super-Earths around the solar type stars HD39194, HD93385, HD96700, HD154088, and HD189567, 2021, arXiv:2108.10198
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