Key parameters at a glance
- A radius of 3.17 Earth radii
- A mass of 10.20 Earth masses
- Surface gravity around 1.02 g
- An orbital period of 18.120 days
- Semi-major axis 0.1300 AU
- Equilibrium temperature 563 K (290 °C)
- Distance from Earth 2,735.13 light-years
- Earth Similarity Index 0.406
- Travel time at Voyager 1 speed 48,233,978 years
2 siblings around Kepler-253
Kepler-253 d 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-253 b | Super-Earth | 1.63 | 3.29 | 3.784 | 949 | 2014 |
| Kepler-253 c | Sub-Neptune | 2.65 | 7.51 | 10.282 | 680 | 2014 |
| Kepler-253 d this | Sub-Neptune | 3.17 | 10.20 | 18.120 | 563 | 2014 |
Kepler-253 d 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-253 d | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 3.17 | 11.21 |
| Mass (M⊕) | 1.00 | 10.20 | 317.83 |
| Density (g/cm³) | 5.51 | 1.76 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.02 | 2.53 |
| Insolation (S⊕) | 1.00 | 24.08 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 63065911
Gaia DR2
Gaia DR2 2126576679217244160
Gaia DR3
Gaia DR3 2126576679217244160
System
Kepler-253
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 18.12 Earth days (5.0% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1300 AU.
Transit Fingerprint
Depth
0.151 %
Duration
4.290 h
Impact parameter b
0.650
Rp / R★
0.034825
Transit midpoint (BJD)
2,455,015.6162
Photometric dip
Transit produces a flux drop of 1,507 ppm lasting ≈ 4.29 h.
Extended Orbital Architecture
Planet / star radius ratio
0.034825
Semi-major axis / stellar radius
33.190
Impact parameter (b)
0.650
Transit mid-time (BJD)
2,455,015.6162
Angular separation (arcsec)
0.15500
Eq. Temperature
563K
(290 °C)
Insolation (S⊕)
24.08
Earth = 1.00
Earth Similarity (ESI)
0.406
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water.
Discovery Paper
Primary reference
Rowe et al. 2014Instrument
Kepler CCD Array
Publication
2014-03
Observation locale
Space
Discovery cohort
Planets confirmed in 2014 at Kepler (12 shown).
Host System: Kepler-253
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,208 K — cooler than the Sun (5,778 K)
Estimated Age
3.72 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.786 R☉
Stellar Mass
0.860 M☉
Metallicity [Fe/H]
0.15
Extended Stellar Properties
Surface gravity (log g)
4.595 dex
Stellar density
1.660 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.164 mas
Total Proper Motion
8.469 mas/yr
PM Right Ascension
-8.47 mas/yr
PM Declination
0.12 mas/yr
Galactic Cartesian (pc)
x = 0.264 · y = -0.658 · z = 0.705
Equatorial (J2000)
RA 291.84193° · Dec 44.85812°
Galactic ℓ, b
77.020° · 12.893°
Ecliptic λ, β
309.219° · 65.350°
HTM-20 index
544670776
Similar Worlds
Kepler-53 c
Sub-Neptune · G-type yellow (Sun-like)
Radius 3.17 R⊕ · 4,455.5 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