Key parameters at a glance
- A radius of 2.89 Earth radii
- A mass of 111.00 Earth masses
- Surface gravity around 13.29 g
- An orbital period of 18.649 days
- Semi-major axis 0.1361 AU
- Equilibrium temperature 701 K (428 °C)
- Distance from Earth 4,455.52 light-years
- Earth Similarity Index 0.259
- Travel time at Voyager 1 speed 78,573,078 years
2 siblings around Kepler-53
Kepler-53 b shares its host star with 2 other confirmed planets. Side-by-side measurements below.
| Planet | Type | Radius (R⊕) | Mass (M⊕) | Period (d) | Eq. T (K) | Year |
|---|---|---|---|---|---|---|
| Kepler-53 d | Sub-Neptune | 2.12 | 37.19 | 9.752 | 870 | 2014 |
| Kepler-53 b this | Sub-Neptune | 2.89 | 111.00 | 18.649 | 701 | 2012 |
| Kepler-53 c | Sub-Neptune | 3.17 | 36.00 | 38.558 | 550 | 2012 |
Kepler-53 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#640of 1978
top 32.3%
This planet
2.89R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-53 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.89 | 11.21 |
| Mass (M⊕) | 1.00 | 111.00 | 317.83 |
| Density (g/cm³) | 5.51 | 1.18 | 1.33 |
| Surface Gravity (g) | 1.00 | 13.29 | 2.53 |
| Insolation (S⊕) | 1.00 | 61.00 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 111.000 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 122446315
Gaia DR2
Gaia DR2 2101188990094347648
Gaia DR3
Gaia DR3 2101188990094347648
System
Kepler-53
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 18.65 Earth days (5.1% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1361 AU.
Transit Fingerprint
Depth
0.089 %
Duration
4.482 h
Impact parameter b
0.760
Rp / R★
0.029870
Transit midpoint (BJD)
2,455,007.7761
Photometric dip
Transit produces a flux drop of 894 ppm lasting ≈ 4.48 h.
Extended Orbital Architecture
Planet / star radius ratio
0.029870
Semi-major axis / stellar radius
33.690
Impact parameter (b)
0.760
Transit mid-time (BJD)
2,455,007.7761
Angular separation (arcsec)
0.09960
Eq. Temperature
701K
(428 °C)
Insolation (S⊕)
61.00
Earth = 1.00
Earth Similarity (ESI)
0.259
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water.
Detection Signatures
Transit photometry
A transit dip has been observed from at least one telescope.
Transit timing variations
Gravitational interactions from neighbours have been detected.
Discovery Paper
Primary reference
Steffen et al. 2013Instrument
Kepler CCD Array
Publication
2013-01
Observation locale
Space
Discovery cohort
Planets confirmed in 2012 at Kepler (12 shown).
Host System: Kepler-53
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,858 K — hotter than the Sun (5,778 K)
Estimated Age
0.30 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.890 R☉
Stellar Mass
0.980 M☉
Metallicity [Fe/H]
0.00
Extended Stellar Properties
Surface gravity (log g)
4.530 dex
Stellar density
0.850 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
0.704 mas
Total Proper Motion
6.761 mas/yr
PM Right Ascension
1.63 mas/yr
PM Declination
6.56 mas/yr
Galactic Cartesian (pc)
x = 0.266 · y = -0.712 · z = 0.650
Equatorial (J2000)
RA 290.46179° · Dec 40.56250°
Galactic ℓ, b
72.605° · 11.951°
Ecliptic λ, β
303.954° · 61.611°
HTM-20 index
-1060323308
Similar Worlds
K2-70 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.89 R⊕ · 759.8 ly
Kepler-689 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.89 R⊕ · 3,691.2 ly
HD 93385 d
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.89 R⊕ · 141.4 ly
Kepler-1682 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.89 R⊕ · 3,782.9 ly
HD 109833 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.89 R⊕ · 259.5 ly
Kepler-20 c
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.89 R⊕ · 921.6 ly