"K2-290, also known as BD-19 4173 and TIC 70803960, is a triple system located 897 light-years away in the constellation of Libra.
The secondary star, K2-290B, is an M dwarf (red dwarf) with a projected orbital separation of 113 AU (astronomical units).
The primary star, K2-290A, is a late-type F star with a mass of 1.2 solar masses and a radius of 1.5 solar radii.
The secondary star, K2-290B, is an M dwarf (red dwarf) with a projected orbital separation of 113 AU (astronomical units).
The tertiary star, K2-290C, is another M dwarf located farther away, with a projected separation of 2,467 AU.
In 2019, two transiting planets were discovered around the primary star in the K2-290 system.
The inner planet, K2-290Ab, has an orbital period of 9.2 days and a radius of 3 Earth radii, making it a hot sub-Neptune.
The outer planet, K2-290Ac, is a warm Jupiter with orbital period 48.4 days and a radius of 11.3 Earth radii.
Based on changes to the star’s spectrum during the planetary transits, they determined that the star rotates in the direction opposite to the planetary orbits.
“Systems similar to K2-290, with coplanar planetary orbits and a
grossly misaligned host star,
----had been predicted to exist as a
consequence of the tidal torque on a protoplanetary disk from a
neighboring star,” they said.
--OR--may I suggest they were Designed that way for a yet unkown reason?.. Through faith we understand that the worlds were framed by the word of God,.. Hebrews 11:3
----“Another possible explanation for such systems is the tilting torque
exerted on the inner system of planets by a massive planet on a wide and
highly inclined orbit.” SciNews
--OR--may I suggest a counterpoint of possibility...that is, IF they really are not supposed to be doing that.....For we know that the whole creation groaneth and travaileth in pain together until now. Romans 8:22