Key parameters at a glance

A radius of 2.00 Earth radii
A mass of 4.66 Earth masses
Surface gravity around 1.17 g
An orbital period of 8.796 days
Semi-major axis 0.0872 AU
Equilibrium temperature 938 K (665 °C)
Distance from Earth 2,744.72 light-years
Earth Similarity Index 0.291
Travel time at Voyager 1 speed 48,403,137 years

Kepler-1111 b Planet Profile

Physical Specs

Radius

2.00 R⊕

Radius (Jupiter)

0.178 R♃

Mass

4.66 M⊕

Mass (Jupiter)

0.015 M♃

Density

3.20 g/cm³

Surface Gravity

1.17 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.291

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

#1955of 1978

top 98.8%

This planet

2.00R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-32 c 2.00 R⊕ Kepler-238 f 2.00 R⊕ Kepler-242 c 2.00 R⊕

Metric	Earth	Kepler-1111 b	Jupiter
Radius (R⊕)	1.00	2.00	11.21
Mass (M⊕)	1.00	4.66	317.83
Density (g/cm³)	5.51	3.20	1.33
Surface Gravity (g)	1.00	1.17	2.53
Insolation (S⊕)	1.00	118.52	0.037

Star Catalogue Identifiers

TIC

TIC 271663670

Gaia DR2

Gaia DR2 2080016106994504704

Gaia DR3

Gaia DR3 2080016106994504704

System

Kepler-1111

Percentile among Sub-Neptune cohort

Radius 2.000 R⊕ · percentile 0 / cohort 1978

Mass 4.660 M⊕ · percentile 2 / cohort 1978

Orbital period 8.80 d · percentile 29 / cohort 1946

Distance 841.54 pc · percentile 68 / cohort 1975

ESI 0.291 · percentile 26 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

8.796 days

Semi-major axis

0.0872 AU

Eccentricity

0.000

Inclination

89.86 °

Year Length

A year here lasts approximately 8.80 Earth days (2.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0872 AU.

Transit Fingerprint

Depth

0.029 %

Duration

3.399 h

Impact parameter b

0.066

Rp / R★

0.016388

Transit midpoint (BJD)

2,454,968.6772

Photometric dip

Transit produces a flux drop of 286 ppm lasting ≈ 3.40 h.

Extended Orbital Architecture

Planet / star radius ratio

0.016388

Semi-major axis / stellar radius

20.060

Impact parameter (b)

0.066

Transit mid-time (BJD)

2,454,968.6772

Angular separation (arcsec)

0.10400

Eq. Temperature

938K

(665 °C)

Insolation (S⊕)

118.52

Earth = 1.00

Earth Similarity (ESI)

0.291

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-1111

Spectral Class

F-type yellow-white

Effective Temperature

6,077 K — hotter than the Sun (5,778 K)

Estimated Age

3.16 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.150 R☉

Stellar Mass

1.100 M☉

Metallicity [Fe/H]

0.02

Extended Stellar Properties

Surface gravity (log g)

4.360 dex

Stellar density

1.975 g/cm³

Metallicity ratio

[Fe/H]

Distance

841.54 parsec

Light-years 2,744.72 ly

V-band magnitude

14.88 mag

Voyager-speed travel 48,403,137 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.160 mas

Total Proper Motion

3.009 mas/yr

PM Right Ascension

1.92 mas/yr

PM Declination

2.31 mas/yr

Galactic Cartesian (pc)

x = 0.300 · y = -0.629 · z = 0.717

Equatorial (J2000)

RA 295.46340° · Dec 45.81277°

Galactic ℓ, b

79.060° · 11.047°

Ecliptic λ, β

315.725° · 65.260°

HTM-20 index

-2005295326