HD 169830

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HD 169830
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Sagittarius
Right ascension 18h 27m 49.48s [1]
Declination –29° 49′ 00.7″ [1]
Apparent magnitude (V) +5.911
Characteristics
Spectral type F7V
B−V color index 0.475
Variable type “None”
Astrometry
Radial velocity (Rv) –17.4 km/s
Proper motion (μ) RA: –1.39 ± 0.55 [1] mas/yr
Dec.: 16.11 ± 0.32 [1] mas/yr
Parallax (π) 27.32 ± 0.41[1] mas
Distance 119 ± 2 ly
(36.6 ± 0.5 pc)
Absolute magnitude (MV) +3.110
Details
Mass 1.4 M
Radius 1.84 R
Luminosity 4.66 L
Surface gravity (log g) 4.17 cgs
Temperature 6266 K
Metallicity 0.21 ± 0.05
Rotation 9.5 days
Age 4.95×109 years
Other designations
CD-29°14965, GC 25175, GSC 06869-01277, HIP 90485, HR 6907, SAO 186838
Database references
SIMBAD data
ARICNS data

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 Jupiter-like planets.

Star[edit]

This star is classified as spectral type F7V, meaning the color of the photosphere of this star is yellow-white. It takes 9.5 days for the 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[edit]

On April 15, 2000, the Geneva Extrasolar Planet Search Team announced the discovery of a 3 MJ planet in a 226 day orbit.[2][3] Three years later on June 30, 2003, the same two teams using the same method discovered a 3.5 MJ second planet orbiting about halfway between the distances of Mars and Jupiter (or in the middle of the asteroid belt) in the solar system from the star.

The HD 169830 planetary system[4]
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity Inclination Radius
b >2.88 MJ 0.81 225.62 ± 0.22 0.31 ± 0.01
c >4.04 MJ 3.60 2102 ± 264 0.33 ± 0.02

See also[edit]

References[edit]

  1. ^ a b c d e van Leeuwen, F. (2007). "HIP 90485". Hipparcos, the New Reduction. Retrieved 2009-12-12. 
  2. ^ "Exoplanets Galore!" (Press release). Garching, Germany: European Southern Observatory. April 15, 2000. Retrieved December 30, 2012. 
  3. ^ Naef, D. et al. (2001). "The CORALIE survey for southern extrasolar planets V. 3 new extrasolar planets". Astronomy and Astrophysics 375 (1): 205–218. arXiv:astro-ph/0106255. Bibcode:2001A&A...375..205N. doi:10.1051/0004-6361:20010841. 
  4. ^ Mayor, M. et al. (2004). "The CORALIE survey for southern extra-solar planets XII. Orbital solutions for 16 extra-solar planets discovered with CORALIE". Astronomy and Astrophysics 415 (1): 391–402. arXiv:astro-ph/0310316. Bibcode:2004A&A...415..391M. doi:10.1051/0004-6361:20034250. 

External links[edit]

Coordinates: Sky map 18h 27m 49.4838s, −29° 49′ 00.715″