| 词条 | HAT-P-9b |
| 释义 |
| name = HAT-P-9b | image = Exoplanet Comparison HAT-P-9 b.png | caption = Size comparison of HAT-P-9b with Jupiter. | discoverer = Shporer et al. | discovery_site = Cambridge, Massachusetts | discovered = June 26, 2008 | discovery_method = Transit (SuperWASP) | apsis = astron | semimajor = {{convert|0.0528|±|0.002|AU|km|abbr=on}} | eccentricity = ~0.0012 | period = 3.92289 ± 0.00004 d | star = HAT-P-9 | mean_radius = 1.4 ± 0.06 {{Jupiter radius|link=y}} | mass = 0.78 ± 0.09 {{Jupiter mass|link=y}} | density = {{convert|380|kg/m3|lk=on|abbr=on}} | surface_grav = {{convert|10.3|m/s2|lk=on|abbr=on}} 1.05 g }}HAT-P-9b is an exoplanet approximately 1500 light years away in the constellation Auriga. This planet was found by the transit method on June 26, 2008. It has a mass 78% that of Jupiter and a radius 140% that of Jupiter. As with most transiting planets, this planet is a hot Jupiter, meaning this Jupiter-like planet orbits extremely close to its parent star, taking only 3.92 days to orbit. References}} External links{{commonscat-inline|HAT-P-9 b|HAT-P-9b}}{{Sky|07|20|40.479|+|37|08|26.17|1560}}{{extrasolar-planet-stub}} 6 : Auriga (constellation)|Exoplanets|Hot Jupiters|Transiting exoplanets|Exoplanets discovered in 2008|Giant planets |
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