| Revision as of 03:06, 25 July 2014 editArt LaPella (talk | contribs)Administrators62,731 editsm uncapitalize← Previous edit | Revision as of 03:18, 29 July 2014 edit undoArtman40 (talk | contribs)2,039 edits →See alsoNext edit → | ||
| Line 40: | Line 40: | ||
| == See also == | == See also == | ||
| * ] | * ] | ||
| * ] | |||
| ==References== | ==References== | ||
Revision as of 03:18, 29 July 2014
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Fornax |
| Right ascension | 03 20 02.9428 |
| Declination | –28° 47′ 01.799″ |
| Apparent magnitude (V) | 8.44 |
| Distance | 117 ly (36 pc) |
| Spectral type | G9.5V |
| Other designations | |
| CD-29 1229, HIP 15526, LTT 1581, SAO 168468 | |
| Database references | |
| SIMBAD | data |
HD 20781 is a star which is part of a wide binary system with HD 20782. Both stars possess their own planetary systems in S type orbits. This is the first time that planets have been found in both components of a wide binary system.
Planetary system
HD 20781
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 12.04 ± 1.11 M🜨 | 0.169 ± 0.0028 | 29.15 ± 0.0201 | 0.11 ± 0.06 | — | — |
| c | 15.76 ± 1,20 M🜨 | 0.3456 ± 0.0047 | 85.131 ± 0.1161 | 0.28 ± 0.09 | — | — |
See also
References
- http://www.aanda.org/index.php?option=com_article&access=bibcode&Itemid=129&bibcode=2007A%2526A...462..345DFUL
- Schneider, J. "Notes for star HD 20781 |cite web". The Extrasolar Planets Encyclopaedia. Retrieved 2011-09-12.
- Mayor, M. Marmier,M. Lovis,C. Udry,S. Ségransan,D. Pepe,F. Benz,W. Bertaux,J.-L. Bouchy,F. Dumusque, G. Curto,Lo Mordasini,C. Queloz,D. Santos,N. C.; et al. (2011). "The HARPS search for southern extra-solar planets XXXIV. Occurrence, mass distribution and orbital properties of super-Earths and Neptune-mass planets". arXiv:1109.2497 .
{{cite arXiv}}: Explicit use of et al. in:|author=(help)CS1 maint: multiple names: authors list (link) - Schneider, J. "Notes for star HD 20781". The Extrasolar Planets Encyclopaedia. Retrieved 2011-09-12.
External links
- "Notes for star HD 20781". The Extrasolar Planets Encyclopaedia. Retrieved 2011.
{{cite web}}: Check date values in:|accessdate=(help)
| The HD 20781/HD 20782 system | |
|---|---|
| HD 20781 | |
|
| |
|
| Constellation of Fornax | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Stars |
| ||||||||||
| |||||||||||
| |||||||||||
| |||||||||||
| Galaxies |
| ||||||||||
| |||||||||||
| |||||||||||
 Category | |||||||||||
 | This main-sequence-star-related article is a stub. You can help Misplaced Pages by expanding it. |