Key parameters at a glance
- A radius of 2.41 Earth radii
- A mass of 6.39 Earth masses
- Surface gravity around 1.10 g
- An orbital period of 24.400 days
- Semi-major axis 0.1441 AU
- Equilibrium temperature 437 K (164 °C)
- Distance from Earth 1,962.25 light-years
- Earth Similarity Index 0.565
- Travel time at Voyager 1 speed 34,604,261 years
- Almost certainly tidally locked to its host star given the close orbit
Kepler-1337 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1312of 1978
top 66.3%
This planet
2.41R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-1337 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.41 | 11.21 |
| Mass (M⊕) | 1.00 | 6.39 | 317.83 |
| Density (g/cm³) | 5.51 | 2.51 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.10 | 2.53 |
| Insolation (S⊕) | 1.00 | 9.18 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 158324326
Gaia DR2
Gaia DR2 2130628757521503104
Gaia DR3
Gaia DR3 2130628757521503104
System
Kepler-1337
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 24.40 Earth days (6.7% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1441 AU.
Transit Fingerprint
Depth
0.093 %
Duration
2.875 h
Impact parameter b
0.855
Rp / R★
0.032855
Transit midpoint (BJD)
2,454,968.6294
Photometric dip
Transit produces a flux drop of 934 ppm lasting ≈ 2.88 h.
Extended Orbital Architecture
Planet / star radius ratio
0.032855
Semi-major axis / stellar radius
30.300
Impact parameter (b)
0.855
Transit mid-time (BJD)
2,454,968.6294
Angular separation (arcsec)
0.24000
Eq. Temperature
437K
(164 °C)
Insolation (S⊕)
9.18
Earth = 1.00
Earth Similarity (ESI)
0.565
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
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-1337
Spectral Class
K-type orange
Effective Temperature
4,523 K — cooler than the Sun (5,778 K)
Estimated Age
4.27 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.670 R☉
Stellar Mass
0.700 M☉
Metallicity [Fe/H]
-0.09
Extended Stellar Properties
Surface gravity (log g)
4.640 dex
Stellar density
1.689 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.634 mas
Total Proper Motion
1.266 mas/yr
PM Right Ascension
-0.86 mas/yr
PM Declination
0.93 mas/yr
Galactic Cartesian (pc)
x = 0.200 · y = -0.655 · z = 0.729
Equatorial (J2000)
RA 287.00912° · Dec 46.79612°
Galactic ℓ, b
77.446° · 16.756°
Ecliptic λ, β
302.801° · 68.307°
HTM-20 index
-1668095453
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