Iota Draconis b
| Exoplanet | List of exoplanets | |
|---|---|---|
 |
||
| Parent star | ||
| Star | Iota Draconis | |
| Constellation | Draco | |
| Right ascension | (α) | 15h 24m 55.7747s |
| Declination | (δ) | +58° 57′ 57.836″ |
| Apparent magnitude | (mV) | 3.29 |
| Distance | 101.2 ly (31 pc) |
|
| Spectral type | K2III | |
| Mass | (m) | 1.82 (± 0.23) M☉ |
| Radius | (r) | 11.99 (± 0.06) R☉ |
| Temperature | (T) | 4545 (± 110) K |
| Metallicity | [Fe/H] | 0.14 |
| Age | 0.8 Gyr | |
| Physical characteristics | ||
| Minimum mass | (m sin i) | 8.82 (± 0.72) MJ |
| Radius | (r) | ~12 R⊕ |
| Stellar flux | (F⊙) | 34.3 ⊕ |
| Temperature | (T) | 598 K (325 °C; 617 °F) |
| Orbital elements | ||
| Semi-major 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 |
| Discovery information | ||
| Discovery date | January 8, 2002 | |
| Discoverer(s) | Frink et al. | |
| Discovery method | Doppler Spectroscopy | |
| Discovery status | Confirmed | |
| Other designations | ||
|
Hypatia, HD 137759 b, HIP 75458 b
|
||
| Database references | ||
| Extrasolar Planets Encyclopaedia |
data | |
| SIMBAD | data | |
| Exoplanet Archive | data | |
| Open Exoplanet Catalogue | data | |
Iota Draconis b, also named Hypatia, is an exoplanet orbiting the K-type giant star Iota Draconis about 101.2 light-years (31 parsecs, or nearly 2.932×1014 km) from Earth in the constellation Draco. The exoplanet was found by using the radial velocity method, from radial-velocity measurements via observation of Doppler shifts in the spectrum of the planet's parent star. It was the first planet discovered orbiting a giant star.
Following its discovery the planet was designated Iota Draconis b. In July 2014 the International Astronomical Union launched a process for giving proper names to certain exoplanets and their host stars. The process involved public nomination and voting for the new names. In December 2015, the IAU announced that the winning name for this planet was Hypatia. The winning name was submitted by Hypatia, a student society of the Physics Faculty of the Universidad Complutense de Madrid, Spain. Hypatia was a famous Greek astronomer, mathematician, and philosopher.
Iota Draconis b is a "super-Jupiter" a planet that has mass larger than that of the gas giants Jupiter and Saturn. It has a blackbody temperature of 598 K (325 °C; 617 °F). It has an estimated mass of around 8.82 MJ and a potential radius of around 12 R⊕ based on its mass, since it is more massive than Jupiter.
...
Wikipedia