  | |
| 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 | |
| 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]
| 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.
- ^ a b c d e f 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.
- ^ a b c d e f g h i j k l m n o p q r s 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.
- ^ a b "HD 189567", SIMBAD, Centre de données astronomiques de Strasbourg, retrieved 2 January 2021
- ^ a b c 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.
- ^ a b 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.
- ^ 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.
- ^ 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.
- ^ a b 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ "HD 189567 b". Extrasolar Planets Encyclopaedia. Retrieved 2020-12-16.
| Stars |
| ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| |||||||||||
| Galaxies |
| ||||||||||
| |||||||||||
