HD 189567

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HD 189567
Pavo constellation map.svg
Red circle.svg
Location of HD 189567 (circled)
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)5.108±0.266 [5]
Apparent magnitude  (H)4.724±0.076 [5]
Apparent magnitude  (K)4.511±0.026 [5]
Astrometry
Radial velocity (Rv)−10.548±0.0003 [6] 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
Mass 0.83±0.01 [3]   M☉
Radius 1.1 [2]   R☉
Luminosity 2.11 [3]   L☉
Surface gravity (log g)4.41±0.01 [3]   cgs
Temperature 5,726±15 [3]   K
Metallicity [Fe/H]−0.24±0.01 [3]   dex
Rotation 38.8 days [3]
Rotational velocity (v sin i)2.0 [7]  km/s
Age 11.0±0.5 Gyr [3]
7.23±2.99 Gyr [8]
4.11 [9]   Gyr
Other designations
CD−67 2385, CPD−67 3703, 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
SIMBAD data

HD 189567 is a star with a pair of orbiting exoplanets, located in the southern constellation of Pavo. It is also known as Gliese 776, CD-67 2385, and HR 7644. The star has an apparent visual magnitude of 6.07, [3] which is bright enough for it to be dimly visible to the naked eye. It lies at a distance of 58  light years from the Sun based on parallax measurements, but is drifting closer with a radial velocity of −10.5 km/s. [6]

The spectrum of HD 189567 presents as an ordinary G-type main-sequence star with a stellar classification of G3V. [3] It has 83% [3] of the mass of the Sun but 110% of the Sun's radius. [2] The star is moderately depleted in heavy elements, having 55% of the solar abundance of iron, [10] but is less depleted in oxygen, having 80% of its solar abundance. [11] It has a low level of magnetic activity in its chromosphere. [3] Age estimates range from 4.11 Gyr based on chromospheric heating to 11.26 Gyr from stellar rotation. [9] The star is radiating 2.1 times the luminosity of the Sun from its photosphere at an effective temperature of 5,726 K. [3]

Planetary system

One exoplanet was discovered around the star in 2011, HD 189567 b. [12] This exoplanet has an estimated minimum mass of 8.5 Earth masses, which means that it is most likely a mini-Neptune. [13] It has an orbital period of 14.3 days, placing it well interior to the habitable zone of the star system. [14] 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±0.00214.288±0.002<0.189——
c ≥7.0±0.9  M🜨 0.197±0.00333.688±0.0250.16±0.09——

References

  1. ↑ Staff (2 August 2008). "Finding the constellation which contains given sky coordinates". DJM.cc. Retrieved 2 January 2021.
  2. 1 2 3 4 5 6 7 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.
  3. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 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. 1 2 "HD 189567", SIMBAD , Centre de données astronomiques de Strasbourg , retrieved 2 January 2021
  5. 1 2 3 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv: 1108.4971 . Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. S2CID   119257644.
  6. 1 2 Soubiran, C.; et al. (2018). "Gaia Data Release 2. The catalogue of radial velocity standard stars". Astronomy and Astrophysics. 616: A7. arXiv: 1804.09370 . Bibcode:2018A&A...616A...7S. doi:10.1051/0004-6361/201832795. S2CID   52952408.
  7. ↑ Llorente de Andrés, F.; et al. (October 2021). "The evolution of lithium in FGK dwarf stars". Astronomy & Astrophysics. 654: A137. arXiv: 2108.05852 . Bibcode:2021A&A...654A.137L. doi: 10.1051/0004-6361/202141339 . eISSN   1432-0746. ISSN   0004-6361.
  8. ↑ Pace, G. (March 2013). "Chromospheric activity as age indicator. An L-shaped chromospheric-activity versus age diagram". Astronomy & Astrophysics. 551: 4. arXiv: 1301.5651 . Bibcode:2013A&A...551L...8P. doi:10.1051/0004-6361/201220364. S2CID   56420519. L8.
  9. 1 2 Vican, Laura (June 2012). "Age Determination for 346 Nearby Stars in the Herschel DEBRIS Survey". The Astronomical Journal. 143 (6): 135. arXiv: 1203.1966 . Bibcode:2012AJ....143..135V. doi:10.1088/0004-6256/143/6/135. S2CID   118539505.
  10. ↑ Giribaldi, R. E.; et al. (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.
  11. ↑ Nissen, P. E.; et al. (2020). "High-precision abundances of elements in solar-type stars". Astronomy & Astrophysics. 640: A81. arXiv: 2006.06013 . Bibcode:2020A&A...640A..81N. doi:10.1051/0004-6361/202038300. S2CID   219573423.
  12. ↑ 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].
  13. ↑ "The Habitable Exoplanets Catalog - Planetary Habitability Laboratory @ UPR Arecibo". phl.upr.edu. Retrieved 2020-12-16.
  14. ↑ "HD 189567 b". Extrasolar Planets Encyclopaedia . Retrieved 2020-12-16.
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