Key parameters at a glance

A radius of 1.13 Earth radii
A mass of 0.07 Earth masses
Surface gravity around 0.05 g
An orbital period of 14.646 days
Equilibrium temperature 418 K (145 °C)
Distance from Earth 1,204.99 light-years
Earth Similarity Index 0.347
Travel time at Voyager 1 speed 21,249,938 years
Almost certainly tidally locked to its host star given the close orbit

5 siblings around Kepler-80

Kepler-80 g shares its host star with 5 other confirmed planets. Side-by-side measurements below.

Planet	Type	Radius (R⊕)	Mass (M⊕)	Period (d)	Eq. T (K)	Year
Kepler-80 f	Rocky Terrestrial	1.21	4,459.73	0.987	1,054	2016
Kepler-80 d	Super-Earth	1.53	6.75	3.072	722	2014
Kepler-80 e	Super-Earth	1.60	4.13	4.645	629	2014
Kepler-80 b	Sub-Neptune	2.67	6.93	7.052	547	2012
Kepler-80 c	Sub-Neptune	2.74	6.74	9.524	495	2012
Kepler-80 g this	Rocky Terrestrial	1.13	0.07	14.646	418	2017

Kepler-80 g Planet Profile

Physical Specs

Radius

1.13 R⊕

Radius (Jupiter)

0.101 R♃

Mass

0.07 M⊕

Mass (Jupiter)

0.000 M♃

Density

0.31 g/cm³

Surface Gravity

0.05 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.347

HZ Position Unknown

Controversial No

Discovery

Year 2017

Method Transit

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#180of 570

top 31.4%

This planet

1.13R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

TOI-1450 A c 1.13 R⊕ Kepler-250 b 1.13 R⊕ Kepler-887 c 1.13 R⊕

Metric	Earth	Kepler-80 g	Jupiter
Radius (R⊕)	1.00	1.13	11.21
Mass (M⊕)	1.00	0.07	317.83
Density (g/cm³)	5.51	0.31	1.33
Surface Gravity (g)	1.00	0.05	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	0.065 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 184296619

Gaia DR2

Gaia DR2 2076328963475704576

Gaia DR3

Gaia DR3 2076328963475704576

System

Kepler-80

Percentile among Rocky Terrestrial cohort

Radius 1.130 R⊕ · percentile 66 / cohort 570

Mass 0.065 M⊕ · percentile 1 / cohort 570

Orbital period 14.65 d · percentile 87 / cohort 567

Distance 369.45 pc · percentile 49 / cohort 566

ESI 0.347 · percentile 50 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

14.646 days

Semi-major axis

— AU

Eccentricity

0.130

Inclination

89.35 °

Year Length

A year here lasts approximately 14.65 Earth days (4.0% of a terrestrial year) on a mildly elliptical path.

Transit Fingerprint

Duration

2.120 h

Impact parameter b

0.520

Rp / R★

0.015300

Transit midpoint (BJD)

2,455,658.6073

Extended Orbital Architecture

Planet / star radius ratio

0.015300

Semi-major axis / stellar radius

45.000

Impact parameter (b)

0.520

Transit mid-time (BJD)

2,455,658.6073

Long. of periastron (ω)

153.00°

Eq. Temperature

418K

(145 °C)

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.347

0 = alien, 1 = Earth-identical

Insufficient insolation data — the surface is too hot to retain surface water. Close-orbiting tidally-locked around a cool host.

Discovery Paper

Primary reference

Shallue & Vanderburg 2018

Instrument

Kepler CCD Array

Publication

2018-02

Observation locale

Space

Discovery cohort

Planets confirmed in 2017 at Kepler (8 shown).

Kepler-1649 b · Rocky Terrestrial Kepler-1652 b · Super-Earth Kepler-1653 b · Sub-Neptune Kepler-1651 b · Super-Earth Kepler-150 f · Sub-Neptune Kepler-1650 b · Rocky Terrestrial Kepler-90 i · Super-Earth Kepler-448 c · Gas Giant

Host System: Kepler-80

Spectral Class

K-type orange

Effective Temperature

4,540 K — cooler than the Sun (5,778 K)

Estimated Age

2.00 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.678 R☉

Stellar Mass

0.830 M☉

Metallicity [Fe/H]

0.04

Extended Stellar Properties

Surface gravity (log g)

4.639 dex

Stellar density

2.260 g/cm³

Metallicity ratio

[M/H]

Distance

369.45 parsec

Light-years 1,204.99 ly

V-band magnitude

15.23 mag

Voyager-speed travel 21,249,938 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

2.678 mas

Total Proper Motion

7.316 mas/yr

PM Right Ascension

-1.38 mas/yr

PM Declination

-7.18 mas/yr

Galactic Cartesian (pc)

x = 0.337 · y = -0.688 · z = 0.643

Equatorial (J2000)

RA 296.11258° · Dec 39.97875°

Galactic ℓ, b

74.087° · 7.853°

Ecliptic λ, β

311.909° · 59.676°

HTM-20 index

-1092040752