Key parameters at a glance
- A radius of 2.53 Earth radii
- A mass of 6.94 Earth masses
- Surface gravity around 1.08 g
- An orbital period of 62.923 days
- Semi-major axis 0.3025 AU
- Equilibrium temperature 462 K (189 °C)
- Distance from Earth 4,465.86 light-years
- Earth Similarity Index 0.529
- Travel time at Voyager 1 speed 78,755,409 years
1 sibling around Kepler-903
Kepler-903 c shares its host star with 1 other confirmed planet. Side-by-side measurements below.
| Planet | Type | Radius (R⊕) | Mass (M⊕) | Period (d) | Eq. T (K) | Year |
|---|---|---|---|---|---|---|
| Kepler-903 b | Sub-Neptune | 2.01 | 4.70 | 10.351 | 842 | 2016 |
| Kepler-903 c this | Sub-Neptune | 2.53 | 6.94 | 62.923 | 462 | 2016 |
Kepler-903 c Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1133of 1978
top 57.2%
This planet
2.53R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-903 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.53 | 11.21 |
| Mass (M⊕) | 1.00 | 6.94 | 317.83 |
| Density (g/cm³) | 5.51 | 2.35 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.08 | 2.53 |
| Insolation (S⊕) | 1.00 | 24.79 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 121732589
Gaia DR2
Gaia DR2 2101340791416961664
Gaia DR3
Gaia DR3 2101340791416961664
System
Kepler-903
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 62.92 Earth days (17.2% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.3025 AU.
Transit Fingerprint
Depth
0.042 %
Duration
11.298 h
Impact parameter b
0.848
Rp / R★
0.023963
Transit midpoint (BJD)
2,454,984.6808
Photometric dip
Transit produces a flux drop of 418 ppm lasting ≈ 11.30 h.
Extended Orbital Architecture
Planet / star radius ratio
0.023963
Semi-major axis / stellar radius
24.000
Impact parameter (b)
0.848
Transit mid-time (BJD)
2,454,984.6808
Angular separation (arcsec)
0.22100
Eq. Temperature
462K
(189 °C)
Insolation (S⊕)
24.79
Earth = 1.00
Earth Similarity (ESI)
0.529
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
Morton et al. 2016Instrument
Kepler CCD Array
Publication
2016-05
Observation locale
Space
Discovery cohort
Planets confirmed in 2016 at Kepler (12 shown).
Host System: Kepler-903
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,682 K — cooler than the Sun (5,778 K)
Estimated Age
4.79 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.970 R☉
Stellar Mass
0.980 M☉
Metallicity [Fe/H]
0.05
Extended Stellar Properties
Surface gravity (log g)
4.460 dex
Stellar density
0.240 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
0.702 mas
Total Proper Motion
5.365 mas/yr
PM Right Ascension
-1.00 mas/yr
PM Declination
-5.27 mas/yr
Galactic Cartesian (pc)
x = 0.244 · y = -0.718 · z = 0.652
Equatorial (J2000)
RA 288.77101° · Dec 40.66418°
Galactic ℓ, b
72.141° · 13.156°
Ecliptic λ, β
301.406° · 62.072°
HTM-20 index
-1418672197
Similar Worlds
Kepler-105 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.53 R⊕ · 1,497.8 ly
Kepler-896 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.53 R⊕ · 7,615.5 ly
Kepler-727 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.53 R⊕ · 2,713.1 ly
TOI-1136 g
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.53 R⊕ · 275.7 ly
Kepler-153 c
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.53 R⊕ · 1,498.3 ly
Kepler-313 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.53 R⊕ · 3,520.5 ly