| Proper Name | Zembretta | | Designations | Zembra b, HATS-72 b, WASP-191 b, TOI-294 b | | Classification | Gas giant (super Neptune) | | Orbital Period | 7 days, 8 hours | | Mean Distance from Zembra | 9.9 million km
0.067 AU | | Mass | 0.125 x Jupiter | | Diameter | 0.722 x Jupiter | | Temperature | 739 K (466°C) | | Parent star | Zembra (HATS-72), probable orange dwarf in Aquarius | | Other planets in this system | None | | Notes | The sole known planet of Zembra, a cool K-type dwarf in Aquarius, Zembretta is a large gas planet with a diameter approaching that of Jupiter. For such a large planet it has a relatively low mass, and it is therefore much less dense than any of the giant planets in the Solar System. Zembretta orbits its star rapidly, at a distance of less than a tenth that of Earth from the Sun, so its 'year' is only a little more than seven days in length. |
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