Iota Draconis
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| Observation data Epoch J2000.0 |
|
|---|---|
| Constellation | Draco |
| Right ascension | 15h 24m 55s 46.482j |
| Declination | +58° 57' 57" 50.16’’’ |
| Apparent magnitude (V) | 3.31 |
| Distance | 102.7 ly (31.5 pc) |
| Spectral type | K2III |
| Other designations | |
|
Edasich, HR 5744, HD 137759,
HIP 75458 |
|
Iota Draconis (ι Dra / ι Draconis) is an orange giant star located 103 light years away in the constellation Draco. It also has the traditional name Edasich.
[edit] Iota Draconis b
| Extrasolar planet | Lists of extrasolar planets | |
|---|---|---|
 |
||
| Orbital elements | ||
| Semimajor axis | (a) | 1.275 ± 0.074 AU |
| Eccentricity | (e) | 0.7124 ± 0.0039 |
| Orbital period | (P) | 511.098 ± 0.089 d |
| Inclination | (i) | ° |
| Longitude of periastron |
(ω) | 91.58 ± 0.81° |
| Time of periastron | (τ) | 2,452,014.59 ± 0.30 JD |
| Physical characteristics | ||
| Mass | (m) | >8.82 ± 0.72 MJ |
| Radius | (r) | ? RJ |
| Density | (ρ) | ? kg/m3 |
| Temperature | (T) | ? K |
| Discovery information | ||
| Discovery date | 2001 | |
| Discoverer(s) | Frink et al. | |
| Detection method | Doppler Spectroscopy | |
| Discovery status | Confirmed | |
Iota Draconis b was discovered in 2001 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, R. et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal 646: 505 – 522. (web Preprint)
- ^ *Frink et al. (2002). "Discovery of a Substellar Companion to the K2 III Giant Iota Draconis". The Astrophysical Journal 576: 478-484.
[edit] External links
- SIMBAD: HD 137759 -- Variable Star
- Extrasolar Planets Encyclopaedia: Notes for star HIP 74758
- SolStation: Edasich/Iota Draconis
- Extrasolar Visions: Iota Draconis b
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