HAT-P-41 is a binary star system. Its primary is a F-type main-sequence star. Its surface temperature is 6390±100 K.^[4] compared to the Sun, HAT-P-41 is enriched in heavy elements, with a metallicity Fe/H index of 0.21±0.10, but is much younger at an age of 2.2±0.4 billion years.^[4]

The candidate stellar companion was detected simultaneously with the planet discovery in 2012.^[5] A multiplicity survey in 2015 did confirm a dim stellar companion of later-K to early-M spectral class, with the probability of being a background star of 14%.^[2] By 2020, it was concluded the candidate companion star is probably gravitationally bound.^[6]

In 2012, one planet, named HAT-P-41b, was discovered on a tight, circular orbit around the primary star.^[5]

The planetary orbit is mildly misaligned with the equatorial plane of the star, misalignment angle equal to −22.1^+0.8
_−6.0 degrees.^[7]

The transmission spectrum of HAT-P-41b taken in 2020 has resulted in contradictory interpretations. One team has concluded the planetary atmosphere is metal-rich, with clear water signatures and absorption bands from sodium, aluminum, titanium and vanadium compounds.^[8] Another team has interpreted the results as arising from a dense hydrogen atmosphere without detectable heavy elements, but with significant ionization.^[9] The atmosphere also appears to contain significant cloud and hazes.^[10] Neither heavy element compounds nor H⁻ ion opacity were found in 2022 study.^[11]

The planetary equilibrium temperature is within 1700-1950 K,^[9] and the dayside temperature has been measured at 1622±125 K.^[12]