Key parameters at a glance

A radius of 2.90 Earth radii
A mass of 14.10 Earth masses
Surface gravity around 1.67 g
An orbital period of 14.749 days
Semi-major axis 0.1264 AU
Equilibrium temperature 955 K (682 °C)
Distance from Earth 1,715.57 light-years
Earth Similarity Index 0.263
Travel time at Voyager 1 speed 30,254,089 years

3 siblings around Kepler-107

Kepler-107 e shares its host star with 3 other confirmed planets. Side-by-side measurements below.

Planet	Type	Radius (R⊕)	Mass (M⊕)	Period (d)	Eq. T (K)	Year
Kepler-107 b	Super-Earth	1.54	3.80	3.180	1,592	2014
Kepler-107 c	Super-Earth	1.60	10.00	4.901	1,378	2014
Kepler-107 d	Rocky Terrestrial	0.86	7.70	7.958	1,173	2014
Kepler-107 e this	Sub-Neptune	2.90	14.10	14.749	955	2014

Kepler-107 e Planet Profile

Physical Specs

Radius

2.90 R⊕

Radius (Jupiter)

0.259 R♃

Mass

14.10 M⊕

Mass (Jupiter)

0.044 M♃

Density

3.18 g/cm³

Surface Gravity

1.67 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.263

HZ Position Inner

Controversial No

Discovery

Year 2014

Method Transit

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#619of 1978

top 31.2%

This planet

2.90R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

K2-138 f 2.90 R⊕ Kepler-1700 b 2.90 R⊕ TOI-1772.01 2.91 R⊕

Metric	Earth	Kepler-107 e	Jupiter
Radius (R⊕)	1.00	2.90	11.21
Mass (M⊕)	1.00	14.10	317.83
Density (g/cm³)	5.51	3.18	1.33
Surface Gravity (g)	1.00	1.67	2.53
Insolation (S⊕)	1.00	138.70	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	14.100 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 27988327

Gaia DR2

Gaia DR2 2086625752425381632

Gaia DR3

Gaia DR3 2086625752425381632

System

Kepler-107

Percentile among Sub-Neptune cohort

Radius 2.903 R⊕ · percentile 69 / cohort 1978

Mass 14.100 M⊕ · percentile 91 / cohort 1978

Orbital period 14.75 d · percentile 50 / cohort 1946

Distance 526.00 pc · percentile 48 / cohort 1975

ESI 0.263 · percentile 19 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

14.749 days

Semi-major axis

0.1264 AU

Eccentricity

0.100

Inclination

89.67 °

Year Length

A year here lasts approximately 14.75 Earth days (4.0% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.1264 AU.

Transit Fingerprint

Depth

0.042 %

Duration

6.117 h

Impact parameter b

0.110

Rp / R★

0.018390

Transit midpoint (BJD)

2,455,694.4855

Photometric dip

Transit produces a flux drop of 421 ppm lasting ≈ 6.12 h.

Extended Orbital Architecture

Planet / star radius ratio

0.018390

Semi-major axis / stellar radius

7.620

Impact parameter (b)

0.110

RV semi-amplitude (K)

3.220 m/s

Transit mid-time (BJD)

2,455,694.4855

Angular separation (arcsec)

0.24000

Eq. Temperature

955K

(682 °C)

Insolation (S⊕)

138.70

Earth = 1.00

Earth Similarity (ESI)

0.263

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.

Radial velocity

Stellar wobble has been measured spectroscopically.

Discovery Paper

Primary reference

Rowe et al. 2014

Instrument

Kepler CCD Array

Publication

2014-03

Observation locale

Space

Discovery cohort

Planets confirmed in 2014 at Kepler (12 shown).

Kepler-186 e · Super-Earth Kepler-395 c · Super-Earth Kepler-220 e · Super-Earth Kepler-249 d · Super-Earth Kepler-296 f · Super-Earth Kepler-367 c · Rocky Terrestrial Kepler-296 e · Super-Earth Kepler-155 c · Sub-Neptune Kepler-138 d · Super-Earth Kepler-333 c · Rocky Terrestrial Kepler-331 d · Super-Earth Kepler-267 d · Sub-Neptune

Host System: Kepler-107

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,854 K — hotter than the Sun (5,778 K)

Estimated Age

4.29 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.447 R☉

Stellar Mass

1.238 M☉

Metallicity [Fe/H]

0.32

Extended Stellar Properties

Surface gravity (log g)

4.210 dex

Stellar density

0.400 g/cm³

Systemic radial velocity

5.64 km/s

Rotational v·sin i

3.60 km/s

Rotation period

20.30 days

Metallicity ratio

[Fe/H]

Distance

526.00 parsec

Light-years 1,715.57 ly

V-band magnitude

12.54 mag

Voyager-speed travel 30,254,089 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.872 mas

Total Proper Motion

9.486 mas/yr

PM Right Ascension

-9.48 mas/yr

PM Declination

0.32 mas/yr

Galactic Cartesian (pc)

x = 0.303 · y = -0.594 · z = 0.746

Equatorial (J2000)

RA 297.02816° · Dec 48.20860°

Galactic ℓ, b

81.726° · 11.233°

Ecliptic λ, β

320.673° · 66.954°

HTM-20 index

2092807115