Key parameters at a glance

A radius of 2.47 Earth radii
A mass of 254.02 Earth masses
Surface gravity around 41.64 g
An orbital period of 5.902 days
Semi-major axis 0.0630 AU
Equilibrium temperature 926 K (653 °C)
Distance from Earth 2,949.51 light-years
Earth Similarity Index 0.153
Travel time at Voyager 1 speed 52,014,668 years

4 siblings around Kepler-82

Kepler-82 e 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-82 d	Super-Earth	1.77	885.10	2.383	1,253	2014
Kepler-82 e this	Sub-Neptune	2.47	254.02	5.902	926	2014
Kepler-82 b	Neptune-like	4.07	12.15	26.440	562	2012
Kepler-82 c	Neptune-like	5.34	13.90	51.540	450	2012
Kepler-82 f	Neptune-like	4.84	20.90	75.732	—	2019

Kepler-82 e Planet Profile

Physical Specs

Radius

2.47 R⊕

Radius (Jupiter)

0.220 R♃

Mass

254.02 M⊕

Mass (Jupiter)

0.799 M♃

Density

0.54 g/cm³

Surface Gravity

41.64 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.153

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

#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-82 e	Jupiter
Radius (R⊕)	1.00	2.47	11.21
Mass (M⊕)	1.00	254.02	317.83
Density (g/cm³)	5.51	0.54	1.33
Surface Gravity (g)	1.00	41.64	2.53
Insolation (S⊕)	1.00	144.34	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	254.020 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 63372898

Gaia DR2

Gaia DR2 2125850623586710400

Gaia DR3

Gaia DR3 2125850623586710400

System

Kepler-82

Percentile among Sub-Neptune cohort

Radius 2.470 R⊕ · percentile 37 / cohort 1978

Mass 254.020 M⊕ · percentile 99 / cohort 1978

Orbital period 5.90 d · percentile 17 / cohort 1946

Distance 904.33 pc · percentile 72 / cohort 1975

ESI 0.153 · percentile 2 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

5.902 days

Semi-major axis

0.0630 AU

Eccentricity

0.000

Inclination

89.23 °

Year Length

A year here lasts approximately 5.90 Earth days (1.6% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0630 AU.

Transit Fingerprint

Depth

0.070 %

Duration

2.827 h

Impact parameter b

0.000

Rp / R★

0.025211

Transit midpoint (BJD)

2,454,969.7844

Photometric dip

Transit produces a flux drop of 702 ppm lasting ≈ 2.83 h.

Extended Orbital Architecture

Planet / star radius ratio

0.025211

Semi-major axis / stellar radius

15.260

Impact parameter (b)

0.000

Transit mid-time (BJD)

2,454,969.7844

Angular separation (arcsec)

0.06970

Eq. Temperature

926K

(653 °C)

Insolation (S⊕)

144.34

Earth = 1.00

Earth Similarity (ESI)

0.153

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.

Transit timing variations

Gravitational interactions from neighbours have been detected.

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-82

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,428 K — cooler than the Sun (5,778 K)

Estimated Age

1.41 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.945 R☉

Stellar Mass

0.946 M☉

Metallicity [Fe/H]

0.21

Extended Stellar Properties

Surface gravity (log g)

4.466 dex

Stellar density

1.490 g/cm³

Metallicity ratio

[M/H]

Distance

904.33 parsec

Light-years 2,949.51 ly

V-band magnitude

15.13 mag

Voyager-speed travel 52,014,668 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.078 mas

Total Proper Motion

6.606 mas/yr

PM Right Ascension

0.19 mas/yr

PM Declination

6.60 mas/yr

Galactic Cartesian (pc)

x = 0.284 · y = -0.674 · z = 0.682

Equatorial (J2000)

RA 292.87337° · Dec 42.96616°

Galactic ℓ, b

75.617° · 11.393°

Ecliptic λ, β

309.299° · 63.318°

HTM-20 index

-34433629