Key parameters at a glance

A radius of 2.47 Earth radii
A mass of 6.66 Earth masses
Surface gravity around 1.09 g
An orbital period of 18.016 days
Semi-major axis 0.1369 AU
Equilibrium temperature 768 K (495 °C)
Distance from Earth 3,309.24 light-years
Earth Similarity Index 0.332
Travel time at Voyager 1 speed 58,358,515 years

Kepler-1307 b Planet Profile

Physical Specs

Radius

2.47 R⊕

Radius (Jupiter)

0.220 R♃

Mass

6.66 M⊕

Mass (Jupiter)

0.021 M♃

Density

2.43 g/cm³

Surface Gravity

1.09 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.332

HZ Position Inner

Controversial No

Discovery

Year 2016

Method Transit

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#1226of 1978

top 61.9%

This planet

2.47R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-263 c 2.47 R⊕ Kepler-1101 b 2.47 R⊕ Kepler-269 b 2.47 R⊕

Metric	Earth	Kepler-1307 b	Jupiter
Radius (R⊕)	1.00	2.47	11.21
Mass (M⊕)	1.00	6.66	317.83
Density (g/cm³)	5.51	2.43	1.33
Surface Gravity (g)	1.00	1.09	2.53
Insolation (S⊕)	1.00	41.19	0.037

Star Catalogue Identifiers

TIC

TIC 63453366

Gaia DR2

Gaia DR2 2128297208757012992

Gaia DR3

Gaia DR3 2128297208757012992

System

Kepler-1307

Percentile among Sub-Neptune cohort

Radius 2.470 R⊕ · percentile 37 / cohort 1978

Mass 6.660 M⊕ · percentile 35 / cohort 1978

Orbital period 18.02 d · percentile 58 / cohort 1946

Distance 1,014.62 pc · percentile 79 / cohort 1975

ESI 0.332 · percentile 36 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

18.016 days

Semi-major axis

0.1369 AU

Eccentricity

0.000

Inclination

89.96 °

Year Length

A year here lasts approximately 18.02 Earth days (4.9% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1369 AU.

Transit Fingerprint

Depth

0.050 %

Duration

3.996 h

Impact parameter b

0.023

Rp / R★

0.021214

Transit midpoint (BJD)

2,454,978.2382

Photometric dip

Transit produces a flux drop of 500 ppm lasting ≈ 4.00 h.

Extended Orbital Architecture

Planet / star radius ratio

0.021214

Semi-major axis / stellar radius

34.970

Impact parameter (b)

0.023

Transit mid-time (BJD)

2,454,978.2382

Angular separation (arcsec)

0.13500

Eq. Temperature

768K

(495 °C)

Insolation (S⊕)

41.19

Earth = 1.00

Earth Similarity (ESI)

0.332

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

Morton et al. 2016

Instrument

Kepler CCD Array

Publication

2016-05

Observation locale

Space

Discovery cohort

Planets confirmed in 2016 at Kepler (12 shown).

Kepler-1512 b · Rocky Terrestrial Kepler-1410 b · Super-Earth Kepler-560 b · Super-Earth Kepler-1389 b · Super-Earth Kepler-1450 b · Super-Earth Kepler-1544 b · Super-Earth Kepler-1459 b · Super-Earth Kepler-1638 b · Super-Earth Kepler-737 b · Super-Earth Kepler-1185 b · Super-Earth Kepler-1178 b · Rocky Terrestrial Kepler-1040 b · Sub-Neptune

Host System: Kepler-1307

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,884 K — hotter than the Sun (5,778 K)

Estimated Age

4.07 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.080 R☉

Stellar Mass

1.060 M☉

Metallicity [Fe/H]

0.06

Extended Stellar Properties

Surface gravity (log g)

4.390 dex

Stellar density

2.492 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,014.62 parsec

Light-years 3,309.24 ly

V-band magnitude

15.64 mag

Voyager-speed travel 58,358,515 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.957 mas

Total Proper Motion

2.215 mas/yr

PM Right Ascension

-2.19 mas/yr

PM Declination

0.34 mas/yr

Galactic Cartesian (pc)

x = 0.266 · y = -0.631 · z = 0.728

Equatorial (J2000)

RA 292.86983° · Dec 46.74187°

Galactic ℓ, b

79.081° · 13.066°

Ecliptic λ, β

312.597° · 66.830°

HTM-20 index

-995484018