HD 190007

HD 190007
Observation data
Epoch J2000      Equinox J2000
Constellation Aquila
Right ascension 20h 02m 47.0458s[1]
Declination +03° 19′ 34.266″[1]
Apparent magnitude (V) 7.48[2]
Characteristics
Spectral type K5 V[2]
U−B color index +1.09[3]
B−V color index +1.11[3]
Variable type BY Dra[2]
Astrometry
Radial velocity (Rv)−30.227 ± 0.0059[2] km/s
Proper motion (μ) RA: −91.21[4] mas/yr
Dec.: 118.84[4] mas/yr
Parallax (π)78.5 ± 0.39[1] mas
Distance41.5 ± 0.2 ly
(12.74 ± 0.06 pc)
Details
Mass0.68[5] M☉
Radius0.80[5] R☉
Luminosity0.24[5] L☉
Surface gravity (log g)4.50[6] cgs
Temperature4548[5] K
Metallicity [Fe/H]0.16[6] dex
Other designations
V1654 Aql, BD+02° 4076, GJ 775, HD 190007, HIP 98698, SAO 125379[2]
Database references
SIMBADdata
ARICNSdata

HD 190007, also known as Gliese 775, is a star in the constellation of Aquila. Its apparent magnitude is 7.48.[2] Parallax measurements by Gaia put the star at a distance of 41.5 light-years (12.74 parsecs) away.[1]

HD 190007 is a BY Draconis variable.[2] It is also a K-type main-sequence star[2] with a mass of 0.68 M☉.[2]

References

  1. 1 2 3 4 Gaia Collaboration (2016). "Gaia Data Release 1". Astronomy & Astrophysics. 595: A2. arXiv:1609.04172. Bibcode:2016A&A...595A...2G. doi:10.1051/0004-6361/201629512.
  2. 1 2 3 4 5 6 7 8 9 "HD 190007". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 4 September 2017.
  3. 1 2 Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Catalogue of Eggen's UBV data. Bibcode:1986EgUBV........0M.
  4. 1 2 van Leeuwen, F.; et al. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.
  5. 1 2 3 4 Chandler, Colin Orion; McDonald, Iain; Kane, Stephen R. (2016). "The Catalog of Earth-Like Exoplanet Survey Targets (CELESTA): A Database of Habitable Zones Around Nearby Stars". The Astronomical Journal. 151 (3): 59. arXiv:1510.05666. Bibcode:2016AJ....151...59C. doi:10.3847/0004-6256/151/3/59.
  6. 1 2 Mishenina, T. V.; Pignatari, M.; Korotin, S. A.; Soubiran, C.; Charbonnel, C.; Thielemann, F.-K.; Gorbaneva, T. I.; Basak, N. Yu. (2013). "10.1051/0004-6361/201220687". Astronomy & Astrophysics. 552: A128. arXiv:1303.1730. Bibcode:2013A&A...552A.128M. doi:10.1051/0004-6361/201220687.


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