Artist's concept of Iota Draconis b (foreground) orbiting its parent star (center).
Discovery
Discovered by
Frink et al.
Discovery date
January 8, 2002
Detection method
Doppler Spectroscopy
Orbital characteristics[2]
Semi-major axis
1.453±0.026 AU
Eccentricity
0.7010+0.0016 −0.0017
Orbital period (sidereal)
1.398643 ± 0.000035 a (510.854 ± 0.013 d)
Inclination
46+27 −19
Longitude of ascending node
87+64 −60
Time of periastron
2455590.17±0.13
Argument of periastron
89.90±0.30
Semi-amplitude
307.6 (± 2.3)
Star
Iota Draconis
Physical characteristics
Mass
16.4+9.3 −4.0MJ[2]
Iota Draconis b, formally named Hypatia (pronounced /haɪˈpeɪʃiə/ or /hɪˈpeɪʃə/), 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.[3]
^Butler, R. P.; 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. S2CID 119067572. Archived from the original on 2019-12-07. Retrieved 2009-03-11.
^ abCite error: The named reference Hill2021 was invoked but never defined (see the help page).
^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. CiteSeerX 10.1.1.6.5332. doi:10.1086/341629. S2CID 12778096.
IotaDraconisb, formally named Hypatia (pronounced /haɪˈpeɪʃiə/ or /hɪˈpeɪʃə/), is an exoplanet orbiting the K-type giant star IotaDraconis about 101...
IotaDraconis (ι Draconis, abbreviated Iota Dra, ι Dra), also named Edasich /ˈɛdəsɪk/, is a star in the northern circumpolar constellation of Draco. A...
velocity measurements of 42 Draconis were inconsistent with the proposed planetary orbit, casting serious doubt on 42 Draconisb's existence, but with a two-planet...
authors in many countries and languages. In 2015, the planet designated IotaDraconisb was named after Hypatia. In Umberto Eco's 2002 novel Baudolino, the...
refers to an asterism consisting of ι Herculis, ξ Draconis, ν Draconis, β Draconis and γ Draconis. Consequently, ι Herculis itself is known as 天棓五 (Tiān...
Gamma Draconis (γ Draconis, abbreviated Gamma Dra, γ Dra), formally named Eltanin /ɛlˈteɪnɪn/, is a star in the northern constellation of Draco. Contrary...
Zeta Draconis (ζ Draconis, abbreviated Zet Dra, ζ Dra) is a binary star in the northern circumpolar constellation of Draco. With an apparent visual magnitude...
Beta Draconis, a name Latinized from β Draconis, is a binary star system and the third-brightest star in the northern circumpolar constellation of Draco...
structure modeled as stratospheric. IotaDraconisb: The first planet discovered around the giant star IotaDraconis, an orange giant. This provides evidence...
orbiting body. 42 DraconisbIotaDraconisb Döllinger, M. P.; et al. (2009). "Planetary companion candidates around the K giant stars 42 Draconis and HD 139...
moon of Saturn, named 1983. 238 Hypatia, discovered 1884 and Hypatia (IotaDraconisb), an exoplanet, named 2015. Hiisi, binary companion of 47171 Lempo...
Eta Draconis (η Draconis, abbreviated Eta Dra, η Dra) is a binary star in the northern circumpolar constellation of Draco. Despite having an apparent visual...
drawback, with Gamma Cephei b being unconfirmed until 2002; while the PSR B1257+12 planets orbit a pulsar. This leaves 51 Pegasi b (discovered and confirmed...
Pictoris is the south pole star of Mercury while Omicron Draconis is its north star. 42 Draconis is the closest star to the north pole of Venus. Eta1 Doradus...
pole star of Venus. 42 Draconis is the star's Flamsteed designation. Following its discovery the planet was designated 42 Draconisb. In July 2014 the International...
Xi Draconis (ξ Draconis, abbreviated Xi Dra, ξ Dra) is a double or binary star in the northern circumpolar constellation of Draco. It has an apparent visual...
magnitude derived from adding the magnitudes of Mizar A (2.220 ±0.003) and Mizar B (3.88) as per the formula: 2.01 ≈ − 2.5 log 10 ( 10 − 0.4 ⋅ 2.220 + 10 −...
confirmed and 139 candidates. The most massive confirmed exoplanet is IotaDraconisb, which masses 9.40 MJ (i.e. 9.4 times the mass of Jupiter); the least...
Iota Capricorni (ι Cap, ι Capricorni) is a solitary, yellow-hued star in the southern constellation of Capricornus. It can be seen with the naked eye,...
If this is the true mass, the object would be a brown dwarf. 42 DraconisIotaDraconis List of extrasolar planets Vallenari, A.; et al. (Gaia collaboration)...
Defrère, D.; et al. (2011). "Hot exozodiacal dust resolved around Vega with IOTA/IONIC". Astronomy and Astrophysics. 534: A5. arXiv:1108.3698. Bibcode:2011A&A...
Iota Leporis (ι Leporis) is a triple star system in the southern constellation of Lepus. It is visible to the naked eye as a point source of blue-white...
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