Key parameters at a glance

A radius of 1.11 Earth radii
A mass of 1.41 Earth masses
Surface gravity around 1.14 g
An orbital period of 4.790 days
Semi-major axis 0.0549 AU
Equilibrium temperature 938 K (665 °C)
Distance from Earth 1,854.15 light-years
Earth Similarity Index 0.341
Travel time at Voyager 1 speed 32,698,012 years

Kepler-1117 b Planet Profile

Physical Specs

Radius

1.11 R⊕

Radius (Jupiter)

0.099 R♃

Mass

1.41 M⊕

Mass (Jupiter)

0.004 M♃

Density

5.67 g/cm³

Surface Gravity

1.14 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.341

HZ Position Inner

Controversial No

Discovery

Year 2016

Method Transit

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#209of 570

top 36.5%

This planet

1.11R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

Kepler-124 d 1.11 R⊕ Kepler-327 b 1.11 R⊕ Kepler-333 c 1.11 R⊕

Metric	Earth	Kepler-1117 b	Jupiter
Radius (R⊕)	1.00	1.11	11.21
Mass (M⊕)	1.00	1.41	317.83
Density (g/cm³)	5.51	5.67	1.33
Surface Gravity (g)	1.00	1.14	2.53
Insolation (S⊕)	1.00	194.98	0.037

Star Catalogue Identifiers

TIC

TIC 26583640

Gaia DR2

Gaia DR2 2129755573491351040

Gaia DR3

Gaia DR3 2129755573491351040

System

Kepler-1117

Percentile among Rocky Terrestrial cohort

Radius 1.110 R⊕ · percentile 61 / cohort 570

Mass 1.410 M⊕ · percentile 56 / cohort 570

Orbital period 4.79 d · percentile 53 / cohort 567

Distance 568.49 pc · percentile 70 / cohort 566

ESI 0.341 · percentile 49 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

4.790 days

Semi-major axis

0.0549 AU

Eccentricity

0.000

Inclination

87.83 °

Year Length

A year here lasts approximately 4.79 Earth days (1.3% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0549 AU.

Transit Fingerprint

Depth

0.014 %

Duration

2.729 h

Impact parameter b

0.840

Rp / R★

0.011152

Transit midpoint (BJD)

2,454,967.9543

Photometric dip

Transit produces a flux drop of 142 ppm lasting ≈ 2.73 h.

Extended Orbital Architecture

Planet / star radius ratio

0.011152

Semi-major axis / stellar radius

13.397

Impact parameter (b)

0.840

Transit mid-time (BJD)

2,454,967.9543

Angular separation (arcsec)

0.09650

Eq. Temperature

938K

(665 °C)

Insolation (S⊕)

194.98

Earth = 1.00

Earth Similarity (ESI)

0.341

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water.

Discovery Paper

Primary reference

Morton et al. 2016

Instrument

Kepler CCD Array

Publication

2016-05

Observation locale

Space

Discovery cohort

Planets confirmed in 2016 at Kepler (12 shown).

Kepler-1512 b · Rocky Terrestrial Kepler-1410 b · Super-Earth Kepler-560 b · Super-Earth Kepler-1389 b · Super-Earth Kepler-1450 b · Super-Earth Kepler-1544 b · Super-Earth Kepler-1459 b · Super-Earth Kepler-1638 b · Super-Earth Kepler-737 b · Super-Earth Kepler-1185 b · Super-Earth Kepler-1178 b · Rocky Terrestrial Kepler-1040 b · Sub-Neptune

Host System: Kepler-1117

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,612 K — cooler than the Sun (5,778 K)

Estimated Age

4.27 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.930 R☉

Stellar Mass

0.950 M☉

Metallicity [Fe/H]

0.03

Extended Stellar Properties

Surface gravity (log g)

4.490 dex

Stellar density

1.490 g/cm³

Metallicity ratio

[Fe/H]

Distance

568.49 parsec

Light-years 1,854.15 ly

V-band magnitude

14.15 mag

Voyager-speed travel 32,698,012 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.730 mas

Total Proper Motion

9.113 mas/yr

PM Right Ascension

-0.70 mas/yr

PM Declination

-9.09 mas/yr

Galactic Cartesian (pc)

x = 0.245 · y = -0.605 · z = 0.757

Equatorial (J2000)

RA 292.08479° · Dec 49.23742°

Galactic ℓ, b

81.172° · 14.608°

Ecliptic λ, β

314.041° · 69.323°

HTM-20 index

713850344