Wikipedia
HD 190007
HD 190007, also known as Gliese 775, is a star in the constellation of Aquila. Parallax measurements by Gaia put the star at a distance of 41.5 light-years (12.7 parsecs) away.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aquila |
| Right ascension | 20h 02m 47.04569s[2] |
| Declination | +03° 19′ 34.2658″[2] |
| Apparent magnitude (V) | 7.46[1] |
| Characteristics | |
| Spectral type | K5 V[3] |
| U−B color index | +1.09[4] |
| B−V color index | +1.11[4] |
| Variable type | BY Dra[5] |
| Astrometry | |
| Radial velocity (Rv) | −30.49±0.12[2] km/s |
| Proper motion (μ) | RA: −90.383 mas/yr[2] Dec.: 119.430 mas/yr[2] |
| Parallax (π) | 78.6465 ± 0.0198 mas[2] |
| Distance | 41.47 ± 0.01 ly (12.715 ± 0.003 pc) |
| Absolute magnitude (MV) | 6.91[6] |
| Details | |
| Mass | 0.77±0.02[1] M☉ |
| Radius | 0.80[7] R☉ |
| Luminosity | 0.24[7] L☉ |
| Surface gravity (log g) | 4.50[8] cgs |
| Temperature | 4610±20[1] K |
| Metallicity [Fe/H] | 0.16[8] dex |
| Rotation | 28.626±0.046 d[1] |
| Other designations | |
| Database references | |
| SIMBAD | data |
| ARICNS | data |
HD 190007 is a BY Draconis variable. It is also a K-type main-sequence star with a mass of 0.77 M☉.
Planetary system Edit
The planet HD 190007 b on a close orbit was first detected in 2020 by the radial-velocity method,[1] with an update published in 2023.[10]
| Companion (in order from star) | Mass | Semimajor axis (AU) | Orbital period (days) | Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | ≥15.5+1.2 −1.3 M🜨 | 0.092±0.0008 | 11.724128(99) | 0.136+0.085 −0.080 | — | — |
References Edit
- ^ a b c d e f g 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.
- ^ a b c d e Vallenari, A.; et al. (Gaia Collaboration) (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. arXiv:2208.00211. doi:10.1051/0004-6361/202243940. Gaia DR3 record for this source at VizieR.
- ^ Kirkpatrick, J. D.; et al. (1991). "A standard stellar spectral sequence in the red/near-infrared - Classes K5 to M9". Astrophysical Journal Supplement Series. 77: 417. Bibcode:1991ApJS...77..417K. doi:10.1086/191611.
- ^ a b Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Catalogue of Eggen's UBV Data. Bibcode:1986EgUBV........0M.
- ^ Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 1: B/gcvs. Bibcode:2009yCat....102025S.
- ^ 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 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.
- ^ a b 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.
- ^ "HD 190007". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 4 September 2017.
- ^ a b Stalport, M.; Cretignier, M.; et al. (August 2023). "A review of planetary systems around HD 99492, HD 147379 and HD 190007 with HARPS-N". Astronomy & Astrophysics. arXiv:2308.05669.
External links Edit
- Sol Station: http://www.solstation.com/stars3/100-ks.htm