ups And: A Nearby Star and Its Three Known Planets

ups And is a star 43.7 light-years away, and three planets have been reported orbiting it. The host is an F8V star, a spectral class that places it among the hotter, more massive stars than the Sun.

The star's measurements describe it as 1.31 solar masses, 1.64 solar radii, and 6210 K. Its reported mass estimate is larger than the Sun's, its reported radius estimate is larger than the Sun's, and its reported temperature is hotter than the Sun's. Its age is 3.12 billion years.

The three listed planets are ups And b, ups And c, and ups And d, all discovered by radial velocity measurements of the host star's wobble. That method reveals a planet and its orbital period through repeated gravitational tugs on the star.

Among the listed planets, ups And b has the shortest year by reported estimates, 4.62 days, and the smallest minimum mass, 219 Earth masses. Its minimum mass is larger than Earth's.

ups And c has the second-shortest year by reported estimates, 241 days, and the second-smallest minimum mass, 630 Earth masses. It was reported in 1999, as was ups And d. Its minimum mass is larger than Earth's and roughly 1.98 times Jupiter's mass.

ups And d has the longest year by reported estimates, 1280 days, and the largest minimum mass, 1310 Earth masses. Its minimum mass is larger than Earth's and roughly 4.13 times Jupiter's mass.