Key parameters at a glance

A radius of 1.61 Earth radii
A mass of 3.00 Earth masses
Surface gravity around 1.16 g
An orbital period of 35.333 days
Semi-major axis 0.2175 AU
Equilibrium temperature 670 K (397 °C)
Distance from Earth 993.62 light-years
Earth Similarity Index 0.411
Travel time at Voyager 1 speed 17,522,452 years

3 siblings around Kepler-100

Kepler-100 d 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	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 this	Super-Earth	1.61	3.00	35.333	670	2014
Kepler-100 e	Neptune-like	5.27	24.14	60.889	—	2023

Kepler-100 d Planet Profile

Physical Specs

Radius

1.61 R⊕

Radius (Jupiter)

0.144 R♃

Mass

3.00 M⊕

Mass (Jupiter)

0.009 M♃

Density

2.70 g/cm³

Surface Gravity

1.16 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.411

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

#550of 1176

top 46.7%

This planet

1.61R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-62 e 1.61 R⊕ Kepler-149 c 1.61 R⊕ Kepler-140 b 1.61 R⊕

Metric	Earth	Kepler-100 d	Jupiter
Radius (R⊕)	1.00	1.61	11.21
Mass (M⊕)	1.00	3.00	317.83
Density (g/cm³)	5.51	2.70	1.33
Surface Gravity (g)	1.00	1.16	2.53
Insolation (S⊕)	1.00	53.98	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	3.000 M⊕	Direct mass measurement (not derived).
Minimum mass (M sin i)	1.773 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 1.610 R⊕ · percentile 52 / cohort 1176

Mass 3.000 M⊕ · percentile 39 / cohort 1176

Orbital period 35.33 d · percentile 93 / cohort 1164

Distance 304.65 pc · percentile 32 / cohort 1171

ESI 0.411 · percentile 62 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

35.333 days

Semi-major axis

0.2175 AU

Eccentricity

0.380

Inclination

88.92 °

Year Length

A year here lasts approximately 35.33 Earth days (9.7% of a terrestrial year) on a highly eccentric trajectory at a mean orbital distance of 0.2175 AU.

Transit Fingerprint

Depth

0.009 %

Duration

5.966 h

Impact parameter b

0.750

Rp / R★

0.009926

Transit midpoint (BJD)

2,454,986.9803

Photometric dip

Transit produces a flux drop of 94 ppm lasting ≈ 5.97 h.

Extended Orbital Architecture

Planet / star radius ratio

0.009926

Semi-major axis / stellar radius

18.380

Impact parameter (b)

0.750

RV semi-amplitude (K)

0.325 m/s

Transit mid-time (BJD)

2,454,986.9803

Angular separation (arcsec)

0.71400

Eq. Temperature

670K

(397 °C)

Insolation (S⊕)

53.98

Earth = 1.00

Earth Similarity (ESI)

0.411

0 = alien, 1 = Earth-identical

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

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

5,825 K — hotter than the Sun (5,778 K)

Estimated Age

6.46 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.490 R☉

Stellar Mass

1.080 M☉

Metallicity [Fe/H]

0.02

Extended Stellar Properties

Surface gravity (log g)

4.125 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