HR 8734 Piscium hosts a hot Jupiter in a small orbit.
The circle at upper left shows the location of the class G "subgiant"
(but probably dwarf) HR 8734 Piscium relative to stars of Aquarius.
The star is near the border between the two constellations, though
just over to the Pisces side. HR 8734's planet has a mass at least
1.28 times that of Jupiter. It orbits its star with a period of
only 7.11 days at an average distance of but 0.07 Astronomical
Units (10.5 million kilometers, 6.5 million miles, 18 percent
Mercury's distance from the Sun, 13 stellar radii), the closeness
making it one of the many "hot Jupiters." An orbital eccentricity
of about 12 percent takes the planet between 0.08 and 0.06 AU from