HD 190007
HD 190007, also known as Gliese 775, is a star in the constellation of Aquila. Its apparent magnitude is 7.48.[3] Parallax measurements by Gaia put the star at a distance of 41.5 light-years (12.74 parsecs) away.[2]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aquila |
| Right ascension | 20h 02m 47.0458s[2] |
| Declination | +03° 19′ 34.266″[2] |
| Apparent magnitude (V) | 7.48[3] |
| Characteristics | |
| Spectral type | K5 V[3] |
| U−B color index | +1.09[4] |
| B−V color index | +1.11[4] |
| Variable type | BY Dra[3] |
| Astrometry | |
| Radial velocity (Rv) | −30.227 ± 0.0059[3] km/s |
| Proper motion (μ) | RA: −91.21[5] mas/yr Dec.: 118.84[5] mas/yr |
| Parallax (π) | 78.5 ± 0.39 mas[2] |
| Distance | 41.5 ± 0.2 ly (12.74 ± 0.06 pc) |
| Details | |
| Mass | 0.68[6] M☉ |
| Radius | 0.80[6] R☉ |
| Luminosity | 0.24[6] L☉ |
| Surface gravity (log g) | 4.50[7] cgs |
| Temperature | 4548[6] K |
| Metallicity [Fe/H] | 0.16[7] dex |
| Other designations | |
| Database references | |
| SIMBAD | data |
| ARICNS | data |
HD 190007 is a BY Draconis variable.[3] It is also a K-type main-sequence star[3] with a mass of 0.68 M☉.[3]
Planetary system
The planetary candidate b on close orbit was first detected in 2020 by radial-velocity method.[1]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | >16.46±1.66 M🜨 | — | 11.72 | 0 | — | — |
References
- Burt, Jennifer; Feng, Fabo; Holden, Bradford; Mamajek, Eric E.; Huang, Chelsea X.; Rosenthal, Mickey M.; Wang, Songhu; Butler, R. Paul; Vogt, Steven S.; Laughlin, Gregory; Henry, Gregory W.; Teske, Johanna K.; Wang, Sharon X.; Crane, Jeffrey D.; Shectman, Steve A. (2021), "A Collage of Small Planets from the Lick–Carnegie Exoplanet Survey: Exploring the Super-Earth and Sub-Neptune Mass Regime", The Astronomical Journal, 161 (1): 10, arXiv:2011.08867, Bibcode:2021AJ....161...10B, doi:10.3847/1538-3881/abc2d0, S2CID 227013469
- 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. S2CID 1828208.
- "HD 190007". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 4 September 2017.
- Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Catalogue of Eggen's UBV Data. Bibcode:1986EgUBV........0M.
- van Leeuwen, F. (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. S2CID 18759600.
- 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. S2CID 119246448.
- 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. S2CID 119268097.
External links
- Sol Station: http://www.solstation.com/stars3/100-ks.htm
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