Key parameters at a glance
- A radius of 3.17 Earth radii
- A mass of 36.00 Earth masses
- Surface gravity around 3.58 g
- An orbital period of 38.558 days
- Semi-major axis 0.2209 AU
- Equilibrium temperature 550 K (277 °C)
- Distance from Earth 4,455.52 light-years
- Earth Similarity Index 0.333
- Travel time at Voyager 1 speed 78,573,078 years
2 siblings around Kepler-53
Kepler-53 c 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 | Sub-Neptune | 2.89 | 111.00 | 18.649 | 701 | 2012 |
| Kepler-53 c this | Sub-Neptune | 3.17 | 36.00 | 38.558 | 550 | 2012 |
Kepler-53 c Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#378of 1978
top 19.1%
This planet
3.17R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-53 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 3.17 | 11.21 |
| Mass (M⊕) | 1.00 | 36.00 | 317.83 |
| Density (g/cm³) | 5.51 | 0.92 | 1.33 |
| Surface Gravity (g) | 1.00 | 3.58 | 2.53 |
| Insolation (S⊕) | 1.00 | 23.18 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 36.000 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 38.56 Earth days (10.6% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.2209 AU.
Transit Fingerprint
Depth
0.099 %
Duration
5.016 h
Impact parameter b
0.833
Rp / R★
0.032770
Transit midpoint (BJD)
2,454,996.8482
Photometric dip
Transit produces a flux drop of 993 ppm lasting ≈ 5.02 h.
Extended Orbital Architecture
Planet / star radius ratio
0.032770
Semi-major axis / stellar radius
25.000
Impact parameter (b)
0.833
Transit mid-time (BJD)
2,454,996.8482
Angular separation (arcsec)
0.16200
Eq. Temperature
550K
(277 °C)
Insolation (S⊕)
23.18
Earth = 1.00
Earth Similarity (ESI)
0.333
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
Kepler-253 d
Sub-Neptune · G-type yellow (Sun-like)
Radius 3.17 R⊕ · 2,735.1 ly
K2-186 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 3.17 R⊕ · 1,078.7 ly
K2-204 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 3.17 R⊕ · 1,882.7 ly
Kepler-1727 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 3.17 R⊕ · 2,916.4 ly
Kepler-1786 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 3.16 R⊕ · 2,817.7 ly
K2-160 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 3.18 R⊕ · 1,028.6 ly