Size comparison of Smertrios with Neptune and Jupiter.
Discovery
Discovered by
B. Sato, D. Fischer, G. Henry et al.[1]
Discovery site
W. M. Keck Observatory
Discovery date
1 July 2005
Detection method
Radial velocity
Orbital characteristics
Semi-major axis
0.042 AU (6.3 Gm)
Eccentricity
0
Orbital period (sidereal)
2.87588874 ± 5.9×10−7[2] d
Semi-amplitude
43.2 ± 2.6
Star
Ogma
Physical characteristics
Mean radius
0.725 ± 0.03 RJ
Mass
0.36 ± 0.03 MJ
Mean density
1,252 kg/m3 (2,110 lb/cu yd)
Temperature
2,300 K (2,030 °C; 3,680 °F)
HD 149026 b, formally named Smertrios/ˈsmɜːrtriɒs/, is an extrasolar planet and hot Jupiter approximately 250 light-years from the Sun in the constellation of Hercules.
The 2.8766-day period planet orbits the yellow subgiant star HD 149026 at a distance of 0.042 AU (3.9 million mi; 6.3 million km) and is notable first as a transiting planet, and second for a small measured radius (relative to mass and incoming heat) that suggests an exceptionally large planetary core.
^Cite error: The named reference Sato2005 was invoked but never defined (see the help page).
^Cite error: The named reference Zhang2018 was invoked but never defined (see the help page).
HD149026b, formally named Smertrios /ˈsmɜːrtriɒs/, is an extrasolar planet and hot Jupiter approximately 250 light-years from the Sun in the constellation...
Hercules. An extrasolar planet (designated HD149026b, later named Smertrios) is believed to orbit the star. HD149026 in the star's identifier in the Henry...
exomoon around HD 189733 b. Dimidium (51 Pegasi b) HD 2039 bHD149026b Kepler-186f Osiris (HD 209458 b) WASP-3b WASP-12b WASP-189 b Bouchy, F.; et al...
composition. The planet orbits at 0.021 AU with a period of 1.94 days. HD149026b: This planet was announced on July 1. Its unusually high density indicated...
Kepler-20b. Gas planets can have large solid cores. The Saturn-mass planet HD149026b has only two-thirds of Saturn's radius, so it may have a rock–ice core...
1086/307430. S2CID 14788813. Kharb, P.; Lister, M. L.; Marshall, H. L.; Hogan, B. S. (1 April 2012). "Chandra and HST imaging of the Quasars PKS B0106+013...
HD 163840 is a binary star system in the northern constellation of Hercules. It has a combined apparent visual magnitude of 6.45, which falls just below...
(officially named Cujam /ˈkjuːdʒəm/, the traditional name of the system) and B. ω Herculis (Latinised to Omega Herculis) is the system's Bayer designation...
archived from the original on March 18, 2012, retrieved 2012-01-16. Mason, B. D.; et al. (2014), "The Washington Visual Double Star Catalog", The Astronomical...
planetary transit observed (by already known exoplanet) was caused by HD 209458 b. The most massive transiting exoplanet is KELT-1b which masses 27.23...
Names: Their Lore and Meaning, this star, together with ν Her and 99 Her (b Herculis) represent the state of Zhongshan (or Chung Shan' "the Middle Mountain")...
At an estimated age of 254 million years, this appears to be an evolved B-type giant star with a stellar classification of B9 III. It is a mercury-manganese...
arcseconds, and are known as Rho Herculis A and B, respectively. A is an A-type giant star, while B is a B-type subgiant star. They are also referred to...
ed.). Cambridge, MA: Sky Publishing. ISBN 978-1-931559-44-7. Rumrill, H. B. (June 1936). "Star Name Pronunciation". Publications of the Astronomical...
of 564.8 days and an eccentricity of 0.526. The primary, component A, is a B-type main sequence star with a stellar classification of B9VspHgMn. It is...
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