Key parameters at a glance

A radius of 1.77 Earth radii
A mass of 885.10 Earth masses
Surface gravity around 282.52 g
An orbital period of 2.383 days
Semi-major axis 0.0340 AU
Equilibrium temperature 1,253 K (980 °C)
Distance from Earth 2,949.51 light-years
Earth Similarity Index 0.070
Travel time at Voyager 1 speed 52,014,668 years

4 siblings around Kepler-82

Kepler-82 d 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 this	Super-Earth	1.77	885.10	2.383	1,253	2014
Kepler-82 e	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 d Planet Profile

Physical Specs

Radius

1.77 R⊕

Radius (Jupiter)

0.158 R♃

Mass

885.10 M⊕

Mass (Jupiter)

2.785 M♃

Density

220.00 g/cm³

Surface Gravity

282.52 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.070

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

#293of 1176

top 24.8%

This planet

1.77R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

GJ 667 C c 1.77 R⊕ Kepler-286 e 1.77 R⊕ Kepler-215 c 1.77 R⊕

Metric	Earth	Kepler-82 d	Jupiter
Radius (R⊕)	1.00	1.77	11.21
Mass (M⊕)	1.00	885.10	317.83
Density (g/cm³)	5.51	220.00	1.33
Surface Gravity (g)	1.00	282.52	2.53
Insolation (S⊕)	1.00	484.35	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	885.098 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 Super-Earth cohort

Radius 1.770 R⊕ · percentile 73 / cohort 1176

Mass 885.098 M⊕ · percentile 100 / cohort 1176

Orbital period 2.38 d · percentile 15 / cohort 1164

Distance 904.33 pc · percentile 75 / cohort 1171

ESI 0.070 · percentile 0 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

2.383 days

Semi-major axis

0.0340 AU

Eccentricity

0.000

Inclination

86.85 °

Year Length

A year here lasts approximately 2.38 Earth days (0.7% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0340 AU.

Transit Fingerprint

Depth

0.037 %

Duration

2.026 h

Impact parameter b

0.050

Rp / R★

0.017484

Transit midpoint (BJD)

2,454,968.0819

Photometric dip

Transit produces a flux drop of 369 ppm lasting ≈ 2.03 h.

Extended Orbital Architecture

Planet / star radius ratio

0.017484

Semi-major axis / stellar radius

8.340

Impact parameter (b)

0.050

Transit mid-time (BJD)

2,454,968.0819

Angular separation (arcsec)

0.03760

Eq. Temperature

1,253K

(980 °C)

Insolation (S⊕)

484.35

Earth = 1.00

Earth Similarity (ESI)

0.070

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.

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