Star in the constellation Aquila
! style="text-align: center; background-color: #FFFFC0;" colspan="2" | Observation dataEpoch J2000      Equinox J2000
! style="text-align:left" | Constellation
! style="text-align:left" | Right ascension
! style="text-align:left" | Declination
! style="text-align:left" | Apparent magnitude (V)
! style="background-color: #FFFFC0; text-align: center;" colspan="2"| Characteristics
! style="text-align:center" colspan="2" | HAT-P-41
! style="text-align:left" | Evolutionary stage
! style="text-align:left" | Spectral type
! style="text-align:center" colspan="2" | HAT-P-41B
! style="text-align:left" | Spectral type
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! style="background-color: #FFFFC0; text-align: center;" colspan="2" | Position (relative to HAT-P-41)
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HAT-P-41 is a binary star system. Its primary is a F-type main-sequence star. Its surface temperature is 6390±100 K. 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.
The candidate stellar companion was detected simultaneously with the planet discovery in 2012. 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%. By 2020, it was concluded the candidate companion star is probably gravitationally bound.
Planetary system.
In 2012, one planet, named HAT-P-41b, was discovered on a tight, circular orbit around the primary star.
The planetary orbit is mildly misaligned with the equatorial plane of the star, misalignment angle equal to −22.1 degrees.
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. Another team has interpreted the results as arising from a dense hydrogen atmosphere without detectable heavy elements, but with significant ionization. The atmosphere also appears to contain significant cloud and hazes. Neither heavy element compounds nor H− ion opacity were found in 2022 study.
The planetary equilibrium temperature is within 1700-1950 K, and the dayside temperature has been measured at 1622±125 K.
! align=center| Companion
! align=center| Mass
! align=center| Semimajor axis
! align=center| Orbital period
! align=center| Eccentricity
! align=center| Inclination
! align=center| Radius
References.
 ;templatestyles src="Reflist/styles.css" / ;
 ;indicator name="01-sky-coordinates" ; ;templatestyles src="Template:Sky/styles.css" / ;Coordinates: &amp;zoom=&amp;show_grid=1&amp;show_constellation_lines=1&amp;show_constellation_boundaries=1&amp;show_const_names=1&amp;show_galaxies=1&amp;img_source=IMG_all 19h 49m 17.4400s, +04° 40′ 20.7836″ ;/indicator ;