HD 68988

HD 68988
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Ursa Major
Right ascension 08h 18m 22.1731s
Declination +61° 27′ 38.599″
Apparent magnitude (V) +8.21
Distance192 ly
(58.8 pc)
Spectral typeG0 V[1]
Other designations

HD 68988 is an 8th magnitude G-type star located approximately 192 light-years away in Ursa Major constellation.

Planetary system

There are two planets: HD 68988 b was discovered in 2002[2] and HD 68988 c was discovered in 2006.[3]

The HD 68988 planetary system[3][4]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b >1.86 ± 0.16 MJ 0.0704 ± 0.0041 6.27711 ± 0.00021 0.1249 ± 0.0087 — —
c >5–20 MJ 5–7 4000–22000 ? — —

See also

References

  1. ↑ Van Belle, Gerard T.; von Braun, Kaspar (2009). "Directly Determined Linear Radii and Effective Temperatures of Exoplanet Host Stars". The Astrophysical Journal 694 (2): 1085. arXiv:0901.1206. Bibcode:2009ApJ...694.1085V. doi:10.1088/0004-637X/694/2/1085.
  2. ↑ Vogt, Steven S.; et al. (2002). "Ten Low-Mass Companions from the Keck Precision Velocity Survey". The Astrophysical Journal 568 (1): 352–362. arXiv:astro-ph/0110378. Bibcode:2002ApJ...568..352V. doi:10.1086/338768.
  3. 1 2 Wright, J. T.; et al. (2007). "Four New Exoplanets and Hints of Additional Substellar Companions to Exoplanet Host Stars". The Astrophysical Journal 657 (1): 533–545. arXiv:astro-ph/0611658. Bibcode:2007ApJ...657..533W. doi:10.1086/510553.
  4. ↑ Butler, R. P.; et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal 646 (1): 505–522. arXiv:astro-ph/0607493. Bibcode:2006ApJ...646..505B. doi:10.1086/504701.

External links

Coordinates: 08h 18m 22.1731s, +61° 27′ 38.599″

This article is issued from Wikipedia - version of the Thursday, April 21, 2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.