HD 85628

HD 85628 is a binary star system in the constellation of Carina.[5]

HD 85628
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Carina
A
Right ascension 09h 50m 19.201s[1]
Declination −66° 06′ 49.90″[1]
B
Right ascension 09h 50m 18.697s[2]
Declination −66° 06′ 53.00″[2]
Characteristics
A
Evolutionary stage main sequence
Spectral type A3V[3]
Variable type planetary transit
B
Evolutionary stage main sequence
Spectral type K8V[4]
Astrometry
A
Proper motion (μ) RA: 5.910±0.019[1] mas/yr
Dec.: −15.044±0.019[1] mas/yr
Parallax (π)5.9437 ± 0.0170 mas[1]
Distance549 ± 2 ly
(168.2 ± 0.5 pc)
B
Proper motion (μ) RA: 5.702±0.032[2] mas/yr
Dec.: −13.161±0.029[2] mas/yr
Parallax (π)5.9266 ± 0.0253 mas[2]
Distance550 ± 2 ly
(168.7 ± 0.7 pc)
Details[4]
A
Mass1.75 M☉
Radius1.92 R☉
Luminosity12.2 L☉
Surface gravity (log g)4.1 cgs
Temperature7,800 K
Metallicity [Fe/H]~0 dex
Age0.8 Gyr
B
Mass0.6 M☉
Other designations
Database references
SIMBADdata

Planetary system

In 2019, an exoplanet was discovered by MASCARA around HD 85628 A, the primary star of the system.[6]

The HD 85628 A planetary system
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b 3.1 MJ 0.047 2.8 0 — —

References
  1. 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.
  2. 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. Houk, Nancy (1975). Michigan catalogue of two-dimensional spectral types for the HD stars. Vol. 1. Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan. Bibcode:1975MSS...C01....0H.
  4. Dorval, P.; Talens, G. J. J.; Otten, G. P. P. L.; Brahm, R.; Jordán, A.; Torres, P.; Vanzi, L.; Zapata, A.; Henry, T.; Paredes, L.; Jao, W. C.; James, H.; Hinojosa, R.; Bakos, G. A.; Csubry, Z.; Bhatti, W.; Suc, V.; Osip, D.; Mamajek, E. E.; Mellon, S. N.; Wyttenbach, A.; Stuik, R.; Kenworthy, M.; Bailey, J.; Ireland, M.; Crawford, S.; Lomberg, B.; Kuhn, R.; Snellen, I. (2020). "MASCARA-4 b/BRing-1 b: A retrograde hot Jupiter around a bright A-type star". Astronomy and Astrophysics. 635: A60. arXiv:1904.02733. Bibcode:2020A&A...635A..60D. doi:10.1051/0004-6361/201935611. S2CID 102351446.
  5. "The Extrasolar Planet Encyclopaedia — HD 85628 A b". exoplanet.eu. Retrieved 19 August 2023.
  6. "NASA Exoplanet Archive". Archived from the original on 2021-04-22. Retrieved 13 June 2021.


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