Companion HD 33636 B | ||
HD 33636 is a binary system located approximately 94 light-years away in Orion constellation. The visible member HD 33636 A is a 7th magnitude yellow main-sequence star. It is located at a distance of 91.6 light years from Earth. It has Fe/H of −0.05 +/- 0.07.
A companion was discovered in 2002 with a minimum mass of planet size. This was ascertained to be a tiny star in 2007, making it HD 33636 B.
HD 33636 B
HD 33636 B was discovered in 2002 by the Keck telescope in Hawaii. It was independently detected at the Haute-Provence Observatory in switzerland. With this method it showed a minimum mass of 9.28 Jupiter masses, and was initially assumed to be a planet and provisionally labelled "HD 33636 b" (lower-case).
In 2007, Bean et al. used the Hubble Space Telescope (HST) and he found that this body has an inclination as little as 4.1 ± 0.1°, which yielded the true mass of 142 Jupiter masses. This is too high to be a planet. It is now classified as an M-dwarf star of spectral type M6V, "HD 33636 B" (upper-case).
This star takes 2117 days or 5.797 years to orbit at the average distance of 3.27 Astronomical Units (AU).