Epoch J2000 Equinox J2000
|Right ascension||04h 24m 59.5348s|
|Declination||+39° 27′ 38.3124″|
|Apparent magnitude (V)||12.41|
|Radial velocity (Rv)||31.21 km/s|
|Proper motion (μ)|| RA: 14.403 mas/yr |
Dec.: -9.377 mas/yr
|Parallax (π)||5.1664 ± 0.0544 mas|
|Distance||631 ± 7 ly |
(194 ± 2 pc)
|Surface gravity (log g)||4.38±0.03 cgs|
|Rotational velocity (v sin i)||2.0±0.5 km/s|
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 the 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. The orbital simulation shown the planets inward of orbit of b would in-spiral and be destroyed within time-span of less than billion years.
(in order from star)
|b||1.946±0.066 MJ||0.0964±0.0014||10.863502±0.000027||0.19±0.019||89.1±0.2°||1.072±0.043 RJ|