Key parameters at a glance
- A radius of 22.98 Earth radii
- A mass of 378.22 Earth masses
- Surface gravity around 0.72 g
- An orbital period of 2.694 days
- Semi-major axis 0.0426 AU
- Equilibrium temperature 1,941 K (1668 °C)
- Distance from Earth 1,135.63 light-years
- Earth Similarity Index 0.045
- Travel time at Voyager 1 speed 20,026,768 years
HAT-P-41 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#11of 1771
top 0.6%
This planet
22.98R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | HAT-P-41 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 22.98 | 11.21 |
| Mass (M⊕) | 1.00 | 378.22 | 317.83 |
| Density (g/cm³) | 5.51 | 0.20 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.72 | 2.53 |
| Insolation (S⊕) | 1.00 | 2,485.07 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 378.218 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 398895470
Gaia DR2
Gaia DR2 4290415081653653632
Gaia DR3
Gaia DR3 4290415081653653632
System
HAT-P-41
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 2.69 Earth days (0.7% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0426 AU.
Transit Fingerprint
Depth
1.100 %
Duration
3.655 h
Impact parameter b
0.222
Rp / R★
0.104900
Transit midpoint (BJD)
2,458,071.2439
Photometric dip
Transit produces a flux drop of 11,000 ppm lasting ≈ 3.66 h.
Extended Orbital Architecture
Planet / star radius ratio
0.104900
Semi-major axis / stellar radius
5.450
Impact parameter (b)
0.222
RV semi-amplitude (K)
92.500 m/s
Transit mid-time (BJD)
2,458,071.2439
Sky-projected obliquity (λ)
-22.10°
Angular separation (arcsec)
0.12200
Eq. Temperature
1,941K
(1668 °C)
Insolation (S⊕)
2,485.07
Earth = 1.00
Earth Similarity (ESI)
0.045
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.
Detection Signatures
Transit photometry
A transit dip has been observed from at least one telescope.
Radial velocity
Stellar wobble has been measured spectroscopically.
Discovery Paper
Primary reference
Hartman et al. 2012Instrument
2K CCD Sensor
Publication
2012-11
Observation locale
Ground
Discovery cohort
Planets confirmed in 2012 at HATNet (5 shown).
Host System: HAT-P-41
Spectral Class
F-type yellow-white
Effective Temperature
6,390 K — hotter than the Sun (5,778 K)
Estimated Age
2.20 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
2.050 R☉
Stellar Mass
2.560 M☉
Metallicity [Fe/H]
0.21
Extended Stellar Properties
Surface gravity (log g)
4.140 dex
Stellar density
0.420 g/cm³
Systemic radial velocity
31.68 km/s
Rotational v·sin i
19.60 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
2.844 mas
Total Proper Motion
7.184 mas/yr
PM Right Ascension
-3.28 mas/yr
PM Declination
-6.39 mas/yr
Galactic Cartesian (pc)
x = 0.457 · y = -0.885 · z = 0.081
Equatorial (J2000)
RA 297.32265° · Dec 4.67241°
Galactic ℓ, b
43.841° · -10.626°
Ecliptic λ, β
300.388° · 25.275°
HTM-20 index
-400671928
Observation Record
RV measurements
2
Transmission spectra
2
Emission spectra
8
Archive notes
2
Similar Worlds
XO-6 b
Gas Giant · F-type yellow-white
Radius 23.20 R⊕ · 768.0 ly
Kepler-435 b
Gas Giant · F-type yellow-white
Radius 22.31 R⊕ · 4,627.4 ly
HAT-P-32 b
Gas Giant · F-type yellow-white
Radius 22.19 R⊕ · 943.3 ly
WASP-12 b
Gas Giant · F-type yellow-white
Radius 22.03 R⊕ · 1,393.5 ly
HAT-P-67 b
Gas Giant · F-type yellow-white
Radius 23.99 R⊕ · 1,212.3 ly
WASP-78 b
Gas Giant · F-type yellow-white
Radius 21.63 R⊕ · 2,460.1 ly