Iota Draconis b
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| Extrasolar planet | List of extrasolar planets | |
|---|---|---|
 |
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| Parent star | ||
| Star | Iota Draconis | |
| Constellation | Draco | |
| Right ascension | (α) | 15h 24m 55.7747s |
| Declination | (δ) | +58° 57′ 57.836″ |
| Apparent magnitude | (mV) | 3.31 |
| Distance | 102.7 ly (31.5 pc) |
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| Spectral type | K2III | |
| Orbital elements | ||
| Semimajor axis | (a) | 1.275 ± 0.074 AU |
| Eccentricity | (e) | 0.7124 ± 0.0039 |
| Orbital period | (P) | 511.098 ± 0.089 d (1.4 y) |
| Argument of periastron |
(ω) | 91.58 ± 0.81° |
| Time of periastron | (T0) | 2,452,014.59 ± 0.30 JD |
| Semi-amplitude | (K) | 307.6 ± 2.3 m/s |
| Physical characteristics | ||
| Minimum mass | (m sin i) | 8.82 ± 0.72 MJ |
| Discovery information | ||
| Discovery date | January 8, 2002 | |
| Discoverer(s) | Frink et al. | |
| Detection method | Doppler Spectroscopy | |
| Discovery status | Confirmed | |
| Other designations | ||
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HD 137759 b, HIP 75458 b
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| Database references | ||
| Extrasolar Planets Encyclopaedia |
data | |
| SIMBAD | data | |
Iota Draconis b was discovered in 2002 during a radial velocity study of K-class giant stars and was the first planet discovered orbiting a giant star. It is in an eccentric orbit, which aided its detection as giant stars have pulsations which can mimic the presence of a planet.[2]
[edit] References
- ^ Butler et al.; Wright, J. T.; Marcy, G. W.; Fischer, D. A.; Vogt, S. S.; Tinney, C. G.; Jones, H. R. A.; Carter, B. D. 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. http://www.iop.org/EJ/article/0004-637X/646/1/505/64046.html.
- ^ Frink et al.; Mitchell, David S.; Quirrenbach, Andreas; Fischer, Debra A.; Marcy, Geoffrey W.; Butler, R. Paul (2002). "Discovery of a Substellar Companion to the K2 III Giant Iota Draconis". The Astrophysical Journal 576 (1): 478–484. Bibcode 2002ApJ...576..478F. doi:10.1086/341629. http://www.iop.org/EJ/article/0004-637X/576/1/478/55741.html.
[edit] External links
Coordinates: 
15h 24m 55.7747s, +58° 57′ 57.836″
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