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) | 3.31 |
| Distance | 102.7 ly (31.5 pc) | |
| Spectral type | K2III | |
| 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 |
| Physical characteristics | ||
| Minimum mass | (m sin i) | 8.82 ± 0.72 MJ |
| Stellar flux | (F⊙) | 34.3 ⊕ |
| 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 extrasolar planet approximately 103 light-years from the Sun in the northern circumpolar constellation of Draco. It was the first planet discovered orbiting a giant star (Iota Draconis).[2]
Discovered in 2002 during a radial velocity study of K-class giant stars, it is in an eccentric orbit, which aided its detection as giant stars have pulsations which can mimic the presence of a planet.[2]
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.[3] The process involved public nomination and voting for the new names.[4] In December 2015, the IAU announced the winning name was Hypatia for this planet.[5] 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.[6]
References
- ↑ Butler; 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.
- 1 2 Frink; 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.
- ↑ NameExoWorlds: An IAU Worldwide Contest to Name Exoplanets and their Host Stars. IAU.org. 9 July 2014
- ↑ NameExoWorlds The Process
- ↑ Final Results of NameExoWorlds Public Vote Released, International Astronomical Union, 15 December 2015.
- ↑ NameExoWorlds The Approved Names
External links
Coordinates: 
15h 24m 55.7747s, +58° 57′ 57.836″