Key parameters at a glance
- A radius of 2.60 Earth radii
- A mass of 7.27 Earth masses
- Surface gravity around 1.08 g
- An orbital period of 8.991 days
- Semi-major axis 0.0870 AU
- Equilibrium temperature 960 K (687 °C)
- Distance from Earth 2,033.94 light-years
- Earth Similarity Index 0.257
- Travel time at Voyager 1 speed 35,868,498 years
1 sibling around Kepler-115
Kepler-115 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-115 b | Rocky Terrestrial | 1.09 | 1.32 | 2.404 | 1,489 | 2014 |
| Kepler-115 c this | Sub-Neptune | 2.60 | 7.27 | 8.991 | 960 | 2014 |
Kepler-115 c Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1017of 1978
top 51.4%
This planet
2.60R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-115 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.60 | 11.21 |
| Mass (M⊕) | 1.00 | 7.27 | 317.83 |
| Density (g/cm³) | 5.51 | 2.27 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.08 | 2.53 |
| Insolation (S⊕) | 1.00 | 209.10 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 273383120
Gaia DR2
Gaia DR2 2079368391569401600
Gaia DR3
Gaia DR3 2079368391569401600
System
Kepler-115
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 8.99 Earth days (2.5% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0870 AU.
Transit Fingerprint
Depth
0.047 %
Duration
4.083 h
Impact parameter b
0.110
Rp / R★
0.019692
Transit midpoint (BJD)
2,454,969.7379
Photometric dip
Transit produces a flux drop of 470 ppm lasting ≈ 4.08 h.
Extended Orbital Architecture
Planet / star radius ratio
0.019692
Semi-major axis / stellar radius
16.920
Impact parameter (b)
0.110
Transit mid-time (BJD)
2,454,969.7379
Angular separation (arcsec)
0.14000
Eq. Temperature
960K
(687 °C)
Insolation (S⊕)
209.10
Earth = 1.00
Earth Similarity (ESI)
0.257
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-115
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,979 K — hotter than the Sun (5,778 K)
Estimated Age
4.17 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.205 R☉
Stellar Mass
1.042 M☉
Metallicity [Fe/H]
-0.05
Extended Stellar Properties
Surface gravity (log g)
4.306 dex
Stellar density
0.760 g/cm³
Metallicity ratio
[M/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.575 mas
Total Proper Motion
16.492 mas/yr
PM Right Ascension
10.73 mas/yr
PM Declination
12.52 mas/yr
Galactic Cartesian (pc)
x = 0.327 · y = -0.623 · z = 0.710
Equatorial (J2000)
RA 297.71193° · Dec 45.26199°
Galactic ℓ, b
79.333° · 9.400°
Ecliptic λ, β
318.538° · 64.104°
HTM-20 index
1095064193
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