Key parameters at a glance
- A radius of 2.00 Earth radii
- A mass of 4.66 Earth masses
- Surface gravity around 1.17 g
- An orbital period of 5.842 days
- Semi-major axis 0.0521 AU
- Equilibrium temperature 606 K (333 °C)
- Distance from Earth 544.68 light-years
- Earth Similarity Index 0.373
- Travel time at Voyager 1 speed 9,605,440 years
- Almost certainly tidally locked to its host star given the close orbit
4 siblings around Kepler-296
Kepler-296 c shares its host star with 4 other confirmed planets. Side-by-side measurements below.
| Planet | Type | Radius (R⊕) | Mass (M⊕) | Period (d) | Eq. T (K) | Year |
|---|---|---|---|---|---|---|
| Kepler-296 c this | Sub-Neptune | 2.00 | 4.66 | 5.842 | 606 | 2014 |
| Kepler-296 b | Super-Earth | 1.61 | 3.22 | 10.864 | 495 | 2014 |
| Kepler-296 d | Sub-Neptune | 2.09 | 5.02 | 19.850 | 403 | 2014 |
| Kepler-296 e | Super-Earth | 1.53 | 2.96 | 34.142 | 337 | 2014 |
| Kepler-296 f | Super-Earth | 1.80 | 3.89 | 63.336 | 274 | 2014 |
Kepler-296 c Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1955of 1978
top 98.8%
This planet
2.00R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-296 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.00 | 11.21 |
| Mass (M⊕) | 1.00 | 4.66 | 317.83 |
| Density (g/cm³) | 5.51 | 1.20 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.17 | 2.53 |
| Insolation (S⊕) | 1.00 | 14.80 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 243271945
Gaia DR2
Gaia DR2 2132069633148965888
Gaia DR3
Gaia DR3 2132069633148965888
System
Kepler-296
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 5.84 Earth days (1.6% of a terrestrial year) on a highly eccentric trajectory at a mean orbital distance of 0.0521 AU.
Transit Fingerprint
Depth
0.134 %
Duration
1.873 h
Impact parameter b
0.250
Rp / R★
0.038100
Transit midpoint (BJD)
2,454,968.9229
Photometric dip
Transit produces a flux drop of 1,336 ppm lasting ≈ 1.87 h.
Extended Orbital Architecture
Planet / star radius ratio
0.038100
Semi-major axis / stellar radius
23.500
Impact parameter (b)
0.250
Transit mid-time (BJD)
2,454,968.9229
Angular separation (arcsec)
0.31200
Eq. Temperature
606K
(333 °C)
Insolation (S⊕)
14.80
Earth = 1.00
Earth Similarity (ESI)
0.373
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water. Close-orbiting tidally-locked around a cool host.
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-296
Spectral Class
M-type red dwarf
Effective Temperature
3,740 K — cooler than the Sun (5,778 K)
Estimated Age
4.20 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.480 R☉
Stellar Mass
0.498 M☉
Metallicity [Fe/H]
-0.08
Extended Stellar Properties
Surface gravity (log g)
4.774 dex
Stellar density
6.400 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Total Proper Motion
11.640 mas/yr
PM Right Ascension
1.84 mas/yr
PM Declination
-11.49 mas/yr
Galactic Cartesian (pc)
x = 0.185 · y = -0.623 · z = 0.760
Equatorial (J2000)
RA 286.54003° · Dec 49.43726°
Galactic ℓ, b
79.901° · 18.014°
Ecliptic λ, β
304.458° · 70.904°
HTM-20 index
339564586
Similar Worlds
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Kepler-236 c
Sub-Neptune · M-type red dwarf
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K2-153 b
Sub-Neptune · M-type red dwarf
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Kepler-32 c
Sub-Neptune · M-type red dwarf
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K2-150 b
Sub-Neptune · M-type red dwarf
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TOI-270 d
Sub-Neptune · M-type red dwarf
Radius 2.00 R⊕ · 73.3 ly