HD 169830

Starbox begin
name = HD 169830Starbox observe
epoch = J2000.0
constell = Sagittarius
ra = RA|18|27|49.4838
dec = DEC|–29|49|00.715
appmag_v = +5.911 Starbox character
class = F7V
r-i =
v-r =
b-v = 0.475
u-b =
variable = “None” Starbox astrometry
radial_v = –17.4
prop_mo_ra = –0.84
prop_mo_dec = 15.16
parallax = 27.53
p_error = 0.91
dist_ly = 118.49
dist_pc = 36.33
absmag_v = +3.110 Starbox detail
age = 4.95
metal = 0.21 ± 0.05
mass = 1.4
radius = 1.84
gravity = 4.17
rotation = 9.5 days
luminosity = 4.66
temperature =6266 Starbox catalog
names = CD-29°14965, GC 25175, GSC 06869-01277, HIP 90485, SAO 186838 Starbox reference
Simbad = HD+169830
ARICNS = 4C04670

HD 169830 is a yellow-white dwarf star (spectral type F9V) in the constellation of Sagittarius, 118.46 light years from our solar system. It is known to be orbited by two large planets.

Star

This star classifies as a spectral type F7V, meaning the color of the photosphere of this star is yellow-white or peach. It takes 9.5 days for star to rotate once around its axis. This star is 40% more massive and 84% larger than our Sun. Combining the mass and radius makes the surface gravity only 41% that of our Sun.

Planetary system

On May 4, 2000, Michel Mayor and Stephane Udry used CORALIE spectrograph and have discovered a 3 M_J planet closer to HD 169830 than Earth to the Sun. Three years later on June 30, 2003, two same teams using the same method have discovered a 3.5 M_J second planet orbiting between about halfway between the distances of Mars and Jupiter (or in the middle of the asteroid belt in the solar system) from the star.

PlanetboxOrbit
exoplanet = b
mass = >2.98
period = 226.01 ± 0.23
semimajor = 0.818
eccentricity = 0.322 ± 0.03PlanetboxOrbit
exoplanet = c
mass = >3.48
period = 1830 ± 28
semimajor = 3.30
eccentricity = 0.264 ± 0.04

ee also

* HD 69830
* List of stars with confirmed extrasolar planets

References

* ( [http://xxx.lanl.gov/abs/astro-ph?papernum=0603836 web Preprint] )
*

External links

*
*
* [http://www.lpl.arizona.edu/~rory/research/xsp/dynamics/ Extrasolar Planet Interactions] by Rory Barnes & Richard Greenberg, Lunar and Planetary Lab, University of Arizona