Key parameters at a glance

A radius of 4.84 Earth radii
A mass of 20.90 Earth masses
Surface gravity around 0.89 g
An orbital period of 75.732 days
Semi-major axis 0.3395 AU
Distance from Earth 2,949.51 light-years
Earth Similarity Index 0.486
Travel time at Voyager 1 speed 52,014,668 years

4 siblings around Kepler-82

Kepler-82 f 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	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 this	Neptune-like	4.84	20.90	75.732	—	2019

Kepler-82 f Planet Profile

Physical Specs

Radius

4.84 R⊕

Radius (Jupiter)

0.432 R♃

Mass

20.90 M⊕

Mass (Jupiter)

0.066 M♃

Density

1.01 g/cm³

Surface Gravity

0.89 g (Earth)

Classification

Planet Type

Neptune-like

ESI Score 0.486

HZ Position Unknown

Controversial No

Discovery

Year 2019

Method Transit Timing Variations

Facility KOINet

Telescope Multiple Telescopes

Size rank in cohort

Rank by radius

#408of 574

top 70.9%

This planet

4.84R⊕

Neptune-like median

6.39R⊕

Nearest-size peers

TOI-6109 c 4.83 R⊕ Kepler-669 b 4.83 R⊕ Kepler-712 c 4.85 R⊕

Metric	Earth	Kepler-82 f	Jupiter
Radius (R⊕)	1.00	4.84	11.21
Mass (M⊕)	1.00	20.90	317.83
Density (g/cm³)	5.51	1.01	1.33
Surface Gravity (g)	1.00	0.89	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	20.900 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 Neptune-like cohort

Radius 4.840 R⊕ · percentile 29 / cohort 574

Mass 20.900 M⊕ · percentile 32 / cohort 574

Orbital period 75.73 d · percentile 77 / cohort 524

Distance 904.33 pc · percentile 70 / cohort 572

ESI 0.486 · percentile 88 / cohort 574

Orbit & Habitability

Orbital Dynamics

Period

75.732 days

Semi-major axis

0.3395 AU

Eccentricity

0.001

Inclination

86.30 °

Year Length

A year here lasts approximately 75.73 Earth days (20.7% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.3395 AU.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.486

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Freudenthal et al. 2019

Instrument

Multiple Instruments

Publication

2019-08

Observation locale

Multiple Locales

Host System: Kepler-82

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,401 K — cooler than the Sun (5,778 K)

Estimated Age

1.41 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.898 R☉

Stellar Mass

0.910 M☉

Metallicity [Fe/H]

0.21

Extended Stellar Properties

Surface gravity (log g)

4.490 dex

Stellar density

1.770 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