Key parameters at a glance
- A radius of 3.15 Earth radii
- A mass of 10.10 Earth masses
- Surface gravity around 1.02 g
- An orbital period of 19.747 days
- Semi-major axis 0.1530 AU
- Equilibrium temperature 754 K (481 °C)
- Distance from Earth 2,601.81 light-years
- Earth Similarity Index 0.307
- Travel time at Voyager 1 speed 45,882,946 years
1 sibling around Kepler-312
Kepler-312 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-312 b | Super-Earth | 1.29 | 2.21 | 1.772 | 1,685 | 2014 |
| Kepler-312 c this | Sub-Neptune | 3.15 | 10.10 | 19.747 | 754 | 2014 |
Kepler-312 c Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#391of 1978
top 19.7%
This planet
3.15R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-312 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 3.15 | 11.21 |
| Mass (M⊕) | 1.00 | 10.10 | 317.83 |
| Density (g/cm³) | 5.51 | 1.78 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.02 | 2.53 |
| Insolation (S⊕) | 1.00 | 165.82 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 274030824
Gaia DR2
Gaia DR2 2078450436800904448
Gaia DR3
Gaia DR3 2078450436800904448
System
Kepler-312
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 19.75 Earth days (5.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1530 AU.
Transit Fingerprint
Depth
0.048 %
Duration
3.376 h
Impact parameter b
0.180
Rp / R★
0.021930
Transit midpoint (BJD)
2,454,980.1036
Photometric dip
Transit produces a flux drop of 481 ppm lasting ≈ 3.38 h.
Extended Orbital Architecture
Planet / star radius ratio
0.021930
Semi-major axis / stellar radius
44.990
Impact parameter (b)
0.180
Transit mid-time (BJD)
2,454,980.1036
Angular separation (arcsec)
0.19200
Eq. Temperature
754K
(481 °C)
Insolation (S⊕)
165.82
Earth = 1.00
Earth Similarity (ESI)
0.307
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
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-312
Spectral Class
F-type yellow-white
Effective Temperature
6,115 K — hotter than the Sun (5,778 K)
Estimated Age
2.88 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.467 R☉
Stellar Mass
1.314 M☉
Metallicity [Fe/H]
0.15
Extended Stellar Properties
Surface gravity (log g)
4.191 dex
Stellar density
0.300 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.225 mas
Total Proper Motion
4.876 mas/yr
PM Right Ascension
3.63 mas/yr
PM Declination
3.25 mas/yr
Galactic Cartesian (pc)
x = 0.351 · y = -0.649 · z = 0.675
Equatorial (J2000)
RA 298.39577° · Dec 42.45977°
Galactic ℓ, b
77.119° · 7.583°
Ecliptic λ, β
317.019° · 61.345°
HTM-20 index
-465939898
Similar Worlds
Kepler-644 b
Sub-Neptune · F-type yellow-white
Radius 3.15 R⊕ · 4,298.9 ly
Kepler-1936 b
Sub-Neptune · F-type yellow-white
Radius 3.17 R⊕ · 2,841.1 ly
Kepler-774 b
Sub-Neptune · F-type yellow-white
Radius 3.17 R⊕ · 2,993.5 ly
Kepler-1094 b
Sub-Neptune · F-type yellow-white
Radius 3.18 R⊕ · 4,210.7 ly
TOI-2458 c
Sub-Neptune · F-type yellow-white
Radius 3.18 R⊕ · 368.4 ly
Kepler-521 b
Sub-Neptune · F-type yellow-white
Radius 3.18 R⊕ · 2,709.2 ly