Key parameters at a glance

A radius of 1.34 Earth radii
A mass of 4.01 Earth masses
Surface gravity around 2.23 g
An orbital period of 6.887 days
Semi-major axis 0.0731 AU
Equilibrium temperature 1,155 K (882 °C)
Distance from Earth 993.62 light-years
Earth Similarity Index 0.226
Travel time at Voyager 1 speed 17,522,452 years

3 siblings around Kepler-100

Kepler-100 b shares its host star with 3 other confirmed planets. Side-by-side measurements below.

Planet	Type	Radius (R⊕)	Mass (M⊕)	Period (d)	Eq. T (K)	Year
Kepler-100 b this	Super-Earth	1.34	4.01	6.887	1,155	2014
Kepler-100 c	Sub-Neptune	2.20	7.05	12.816	939	2014
Kepler-100 d	Super-Earth	1.61	3.00	35.333	670	2014
Kepler-100 e	Neptune-like	5.27	24.14	60.889	—	2023

Kepler-100 b Planet Profile

Physical Specs

Radius

1.34 R⊕

Radius (Jupiter)

0.120 R♃

Mass

4.01 M⊕

Mass (Jupiter)

0.013 M♃

Density

12.36 g/cm³

Surface Gravity

2.23 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.226

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

#1010of 1176

top 85.8%

This planet

1.34R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

LTT 1445 A b 1.34 R⊕ Kepler-191 b 1.34 R⊕ Kepler-285 b 1.34 R⊕

Metric	Earth	Kepler-100 b	Jupiter
Radius (R⊕)	1.00	1.34	11.21
Mass (M⊕)	1.00	4.01	317.83
Density (g/cm³)	5.51	12.36	1.33
Surface Gravity (g)	1.00	2.23	2.53
Insolation (S⊕)	1.00	478.21	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	4.010 M⊕	Direct mass measurement (not derived).
Minimum mass (M sin i)	5.445 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

TIC

TIC 159654016

Gaia DR2

Gaia DR2 2101733244046205568

Gaia DR3

Gaia DR3 2101733244046205568

System

Kepler-100

Percentile among Super-Earth cohort

Radius 1.340 R⊕ · percentile 13 / cohort 1176

Mass 4.010 M⊕ · percentile 74 / cohort 1176

Orbital period 6.89 d · percentile 51 / cohort 1164

Distance 304.65 pc · percentile 32 / cohort 1171

ESI 0.226 · percentile 18 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

6.887 days

Semi-major axis

0.0731 AU

Eccentricity

0.130

Inclination

85.37 °

Year Length

A year here lasts approximately 6.89 Earth days (1.9% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.0731 AU.

Transit Fingerprint

Depth

0.007 %

Duration

4.428 h

Impact parameter b

0.540

Rp / R★

0.008062

Transit midpoint (BJD)

2,454,966.1766

Photometric dip

Transit produces a flux drop of 74 ppm lasting ≈ 4.43 h.

Extended Orbital Architecture

Planet / star radius ratio

0.008062

Semi-major axis / stellar radius

6.180

Impact parameter (b)

0.540

RV semi-amplitude (K)

1.250 m/s

Transit mid-time (BJD)

2,454,966.1766

Angular separation (arcsec)

0.24000

Eq. Temperature

1,155K

(882 °C)

Insolation (S⊕)

478.21

Earth = 1.00

Earth Similarity (ESI)

0.226

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.

Radial velocity

Stellar wobble has been measured spectroscopically.

Discovery Paper

Primary reference

Marcy et al. 2014

Instrument

Kepler CCD Array

Publication

2014-02

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-100

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,837 K — hotter than the Sun (5,778 K)

Estimated Age

6.92 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.510 R☉

Stellar Mass

1.130 M☉

Metallicity [Fe/H]

0.10

Extended Stellar Properties

Surface gravity (log g)

4.100 dex

Stellar density

0.440 g/cm³

Systemic radial velocity

-60.44 km/s

Rotational v·sin i

3.70 km/s

Metallicity ratio

[Fe/H]

Distance

304.65 parsec

Light-years 993.62 ly

V-band magnitude

11.06 mag

Voyager-speed travel 17,522,452 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

3.254 mas

Total Proper Motion

34.787 mas/yr

PM Right Ascension

19.91 mas/yr

PM Declination

-28.53 mas/yr

Galactic Cartesian (pc)

x = 0.271 · y = -0.692 · z = 0.669

Equatorial (J2000)

RA 291.38613° · Dec 41.99014°

Galactic ℓ, b

74.228° · 11.945°

Ecliptic λ, β

306.304° · 62.759°

HTM-20 index

-383871624