Key parameters at a glance
- A radius of 14.77 Earth radii
- A mass of 471.66 Earth masses
- Surface gravity around 2.16 g
- An orbital period of 1.962 days
- Semi-major axis 0.0316 AU
- Equilibrium temperature 1,778 K (1505 °C)
- Distance from Earth 2,174.81 light-years
- Earth Similarity Index 0.070
- Travel time at Voyager 1 speed 38,352,856 years
HAT-P-53 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#257of 1771
top 14.5%
This planet
14.77R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | HAT-P-53 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 14.77 | 11.21 |
| Mass (M⊕) | 1.00 | 471.66 | 317.83 |
| Density (g/cm³) | 5.51 | 0.80 | 1.33 |
| Surface Gravity (g) | 1.00 | 2.16 | 2.53 |
| Insolation (S⊕) | 1.00 | 1,400.02 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 471.660 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 189380158
Gaia DR2
Gaia DR2 323386882492982144
Gaia DR3
Gaia DR3 323386882492982144
System
HAT-P-53
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 1.96 Earth days (0.5% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.0316 AU.
Transit Fingerprint
Depth
1.409 %
Duration
2.794 h
Impact parameter b
0.380
Rp / R★
0.112000
Transit midpoint (BJD)
2,455,829.4478
Photometric dip
Transit produces a flux drop of 14,086 ppm lasting ≈ 2.79 h.
Extended Orbital Architecture
Planet / star radius ratio
0.112000
Semi-major axis / stellar radius
5.610
Impact parameter (b)
0.380
RV semi-amplitude (K)
226.800 m/s
Transit mid-time (BJD)
2,455,829.4478
Angular separation (arcsec)
0.04740
Eq. Temperature
1,778K
(1505 °C)
Insolation (S⊕)
1,400.02
Earth = 1.00
Earth Similarity (ESI)
0.070
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. 2015Instrument
Multiple Instruments
Publication
2015-12
Observation locale
Ground
Discovery cohort
Planets confirmed in 2015 at HATNet (7 shown).
Host System: HAT-P-53
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,956 K — hotter than the Sun (5,778 K)
Estimated Age
4.67 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
1.209 R☉
Stellar Mass
1.093 M☉
Metallicity [Fe/H]
0.00
Extended Stellar Properties
Surface gravity (log g)
4.310 dex
Stellar density
0.870 g/cm³
Systemic radial velocity
-16.99 km/s
Rotational v·sin i
4.10 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 17 bands
Astrometric Data
Parallax
1.471 mas
Total Proper Motion
3.241 mas/yr
PM Right Ascension
-0.18 mas/yr
PM Declination
-3.24 mas/yr
Galactic Cartesian (pc)
x = 0.722 · y = 0.290 · z = 0.629
Equatorial (J2000)
RA 21.87110° · Dec 38.96811°
Galactic ℓ, b
130.556° · -23.369°
Ecliptic λ, β
35.560° · 27.502°
HTM-20 index
2077842163
Similar Worlds
HAT-P-1 b
Gas Giant · G-type yellow (Sun-like)
Radius 14.78 R⊕ · 518.5 ly
WASP-68 b
Gas Giant · G-type yellow (Sun-like)
Radius 14.80 R⊕ · 738.4 ly
Gaia-2 b
Gas Giant · G-type yellow (Sun-like)
Radius 14.82 R⊕ · 682.4 ly
KELT-23 A b
Gas Giant · G-type yellow (Sun-like)
Radius 14.83 R⊕ · 411.8 ly
HAT-P-55 b
Gas Giant · G-type yellow (Sun-like)
Radius 14.84 R⊕ · 1,667.9 ly
WASP-127 b
Gas Giant · G-type yellow (Sun-like)
Radius 14.70 R⊕ · 520.2 ly