HD 192699

HD 192699
Observation data; Epoch J2000 Equinox J2000
Constellation	Aquila
Right ascension	20h 16m 06.005s
Declination	+04° 34′ 50.85″
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 mas/yr; Dec.: -52.15 ± 0.53 mas/yr
Parallax (π)	15.24 ± 0.57 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 M_J	1.16	351.5 ± 6	0.149 ± 0.06	—	—

References

↑ ^1.0 ^1.1 ^1.2 ^1.3 ^1.4 Lua error in package.lua at line 80: module 'strict' not found. Vizier catalog entry
↑ ^2.0 ^2.1 Lua error in package.lua at line 80: module 'strict' not found.

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