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HAT-P-15
HAT-P-15 is a G-type main-sequence star about 630 light-years away. The star is older than Sun yet has a concentration of heavy elements roughly 190% of solar abundance. The star has no noticeable starspot activity.
The spectroscopic survey in 2015 have failed to find any stellar companions to it, yet imaging survey have identified a possibly two companion red dwarf stars at projected separations 1210 and 1370 AU, respectively.
The star was named Berehynia in December 2019 by Ukrainian amateur astronomers.
In 2010 a transiting hot superjovian planet b (named Tryzub in 2019) was detected. It has an equilibrium temperature of 904±20 K. An orbital simulation shows that any planets inward of the orbit of b would spiral inward and be destroyed within a time-span of less than a billion years. The planetary orbit is well aligned with the equatorial plane of the star, misalignment equal to 13±6 degrees.
HAT-P-15
HAT-P-15 is a G-type main-sequence star about 630 light-years away. The star is older than Sun yet has a concentration of heavy elements roughly 190% of solar abundance. The star has no noticeable starspot activity.
The spectroscopic survey in 2015 have failed to find any stellar companions to it, yet imaging survey have identified a possibly two companion red dwarf stars at projected separations 1210 and 1370 AU, respectively.
The star was named Berehynia in December 2019 by Ukrainian amateur astronomers.
In 2010 a transiting hot superjovian planet b (named Tryzub in 2019) was detected. It has an equilibrium temperature of 904±20 K. An orbital simulation shows that any planets inward of the orbit of b would spiral inward and be destroyed within a time-span of less than a billion years. The planetary orbit is well aligned with the equatorial plane of the star, misalignment equal to 13±6 degrees.