Key parameters at a glance
- A radius of 2.05 Earth radii
- A mass of 4.86 Earth masses
- Surface gravity around 1.16 g
- An orbital period of 9.693 days
- Semi-major axis 0.0930 AU
- Equilibrium temperature 1,017 K (744 °C)
- Distance from Earth 2,211.26 light-years
- Earth Similarity Index 0.264
- Travel time at Voyager 1 speed 38,995,500 years
1 sibling around Kepler-337
Kepler-337 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-337 b | Super-Earth | 1.54 | 2.99 | 3.293 | 1,458 | 2014 |
| Kepler-337 c this | Sub-Neptune | 2.05 | 4.86 | 9.693 | 1,017 | 2014 |
Kepler-337 c Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1888of 1978
top 95.4%
This planet
2.05R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-337 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.05 | 11.21 |
| Mass (M⊕) | 1.00 | 4.86 | 317.83 |
| Density (g/cm³) | 5.51 | 3.10 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.16 | 2.53 |
| Insolation (S⊕) | 1.00 | 376.21 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 159226052
Gaia DR2
Gaia DR2 2127851116271982848
Gaia DR3
Gaia DR3 2127851116271982848
System
Kepler-337
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 9.69 Earth days (2.7% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0930 AU.
Transit Fingerprint
Depth
0.014 %
Duration
5.509 h
Impact parameter b
0.000
Rp / R★
0.012560
Transit midpoint (BJD)
2,454,965.8115
Photometric dip
Transit produces a flux drop of 142 ppm lasting ≈ 5.51 h.
Extended Orbital Architecture
Planet / star radius ratio
0.012560
Semi-major axis / stellar radius
6.600
Impact parameter (b)
0.000
Transit mid-time (BJD)
2,454,965.8115
Angular separation (arcsec)
0.13700
Eq. Temperature
1,017K
(744 °C)
Insolation (S⊕)
376.21
Earth = 1.00
Earth Similarity (ESI)
0.264
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.
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-337
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,684 K — cooler than the Sun (5,778 K)
Estimated Age
7.94 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
1.761 R☉
Stellar Mass
1.081 M☉
Metallicity [Fe/H]
0.07
Extended Stellar Properties
Surface gravity (log g)
4.004 dex
Stellar density
0.190 g/cm³
Systemic radial velocity
-64.57 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.446 mas
Total Proper Motion
4.395 mas/yr
PM Right Ascension
3.67 mas/yr
PM Declination
2.42 mas/yr
Galactic Cartesian (pc)
x = 0.233 · y = -0.639 · z = 0.733
Equatorial (J2000)
RA 290.06051° · Dec 47.16395°
Galactic ℓ, b
78.643° · 14.982°
Ecliptic λ, β
308.394° · 67.946°
HTM-20 index
-424695117
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Kepler-868 b
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Kepler-311 d
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Kepler-1958 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.05 R⊕ · 4,306.5 ly