HD 192699
| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Aquila |
| Right ascension | 20h 16m 06.005s[1] |
| Declination | +04° 34′ 50.85″[1] |
| Apparent magnitude (V) | 6.449 |
| Characteristics | |
| Spectral type | G8IV |
| B−V color index | 0.86 ± 0.015 |
| Astrometry | |
| Proper motion (μ) | RA: -39.24 ± 0.53[1] mas/yr Dec.: -52.15 ± 0.53[1] mas/yr |
| Parallax (π) | 15.24 ± 0.57[1] mas |
| Distance | 214 ± 8 ly (66 ± 2 pc) |
| Absolute magnitude (MV) | 2.306 |
| Details | |
| Mass | 1.68 ± 0.12 M☉ |
| Radius | 4.25 ± 0.51 R☉ |
| Surface gravity (log g) | 3.66 cgs |
| Temperature | 5220 ± 44 K |
| Metallicity [Fe/H] | -0.15 ± 0.04 dex |
| Age | 1.8 ± 1 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Extrasolar Planets Encyclopaedia |
data |
| Data sources: | |
| Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.) |
|
HD 192699 is a yellow subgiant star located approximately 214 light-years away in the constellation of Aquila. It has the apparent magnitude of 6.45. Based on its mass of 1.68 solar, it was an A-type star when it was a main-sequence. We report precision Doppler measurements of three intermediate-mass subgiants from Lick and Keck Observatories in Mount Hamilton (California) and Mauna Kea (Hawai'i), USA. All three stars show variability in their radial velocities consistent with planet-mass companions in Keplerian orbits. In April 2007, a planet was announced orbiting the star, together with HD 175541 b and HD 210702 b.[2]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | >2.5 MJ | 1.16 | 351.5 ± 6 | 0.149 ± 0.06 | — | — |
See also
References
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Coordinates: 
20h 16m 06.0043s, +04° 34′ 50.863″
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