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]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Aquila |
Right ascension | 19h 49m 17.4400s[1] |
Declination | 04° 40′ 20.7836″[1] |
Apparent magnitude (V) | 11.36 |
Characteristics | |
HAT-P-41 | |
Evolutionary stage | main-sequence star |
Spectral type | F9V[2] |
HAT-P-41B | |
Spectral type | K9-M0[2] |
Astrometry | |
Radial velocity (Rv) | 33.2±0.5[3] km/s |
Proper motion (μ) | RA: −3.177[3] mas/yr Dec.: −6.570[3] mas/yr |
Parallax (π) | 2.8477 ± 0.0176 mas[3] |
Distance | 1,145 ± 7 ly (351 ± 2 pc) |
Position (relative to HAT-P-41)[2] | |
Component | HAT-P-41B |
Epoch of observation | 2013 |
Angular distance | 3.619±0.005″ |
Position angle | 184.1±0.2° |
Projected separation | 1270 AU |
Details[4] | |
Mass | 1.418±0.047 M☉ |
Radius | 1.683+0.058 −0.036 R☉ |
Temperature | 6390±100 K |
Metallicity [Fe/H] | 0.21±0.10 dex |
Rotational velocity (v sin i) | 19.60±0.50 km/s |
Age | 2.2±0.4 Gyr |
Other designations | |
HAT-P-41: Gaia DR2 4290415081653653632, Gaia EDR3 4290415081653653632 | |
HAT-P-41B: Gaia DR2 4290415081653653376, Gaia EDR3 4290415081653653376 | |
Database references | |
SIMBAD | data |
Hat-P-41b |
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]
Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b | 0.795+0.056 −0.091 MJ |
0.04258+0.00047 −0.00048 |
2.694047±0.000004 | <0.22 | 87.7±1.0° | 1.685+0.076 −0.051 RJ |