HD 190007
| 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[2] mas |
| 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, 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]
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 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 |
|---|---|---|---|---|---|---|
| >16.46±1.66 M
|