Key parameters at a glance
- A radius of 2.65 Earth radii
- A mass of 7.51 Earth masses
- Surface gravity around 1.07 g
- An orbital period of 10.282 days
- Semi-major axis 0.0890 AU
- Equilibrium temperature 680 K (407 °C)
- Distance from Earth 2,735.13 light-years
- Earth Similarity Index 0.364
- Travel time at Voyager 1 speed 48,233,978 years
2 siblings around Kepler-253
Kepler-253 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-253 b | Super-Earth | 1.63 | 3.29 | 3.784 | 949 | 2014 |
| Kepler-253 c this | Sub-Neptune | 2.65 | 7.51 | 10.282 | 680 | 2014 |
| Kepler-253 d | Sub-Neptune | 3.17 | 10.20 | 18.120 | 563 | 2014 |
Kepler-253 c Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#946of 1978
top 47.8%
This planet
2.65R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-253 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.65 | 11.21 |
| Mass (M⊕) | 1.00 | 7.51 | 317.83 |
| Density (g/cm³) | 5.51 | 2.22 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.07 | 2.53 |
| Insolation (S⊕) | 1.00 | 51.27 | 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 10.28 Earth days (2.8% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0890 AU.
Transit Fingerprint
Depth
0.111 %
Duration
3.517 h
Impact parameter b
0.490
Rp / R★
0.029849
Transit midpoint (BJD)
2,455,008.3398
Photometric dip
Transit produces a flux drop of 1,111 ppm lasting ≈ 3.52 h.
Extended Orbital Architecture
Planet / star radius ratio
0.029849
Semi-major axis / stellar radius
23.230
Impact parameter (b)
0.490
Transit mid-time (BJD)
2,455,008.3398
Angular separation (arcsec)
0.10600
Eq. Temperature
680K
(407 °C)
Insolation (S⊕)
51.27
Earth = 1.00
Earth Similarity (ESI)
0.364
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-299 c
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.65 R⊕ · 3,431.9 ly
Kepler-109 c
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.65 R⊕ · 1,548.8 ly
Kepler-603 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.65 R⊕ · 5,021.6 ly
Kepler-375 c
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.65 R⊕ · 4,040.5 ly
Kepler-1924 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.65 R⊕ · 6,232.1 ly
Kepler-1548 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.64 R⊕ · 2,845.0 ly