HD 192699

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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
2MASS J20160600+0434509, GSC 00504-02358, TYC 504-2358-1, BD+04° 4395, FK5 3623, HIP 99894, SAO 125628
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]

The HD 192699 planetary system[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[edit]

References[edit]

External links[edit]

Coordinates: Sky map 20h 16m 06.0043s, +04° 34′ 50.863″