Key parameters at a glance

A radius of 1.21 Earth radii
A mass of 119.90 Earth masses
Surface gravity around 81.89 g
An orbital period of 4.176 days
Semi-major axis 0.0426 AU
Equilibrium temperature 694 K (421 °C)
Distance from Earth 1,730.22 light-years
Earth Similarity Index 0.135
Travel time at Voyager 1 speed 30,512,343 years
Almost certainly tidally locked to its host star given the close orbit

1 sibling around Kepler-415

Kepler-415 b shares its host star with 1 other confirmed planet. Side-by-side measurements below.

Planet	Type	Radius (R⊕)	Mass (M⊕)	Period (d)	Eq. T (K)	Year
Kepler-415 b this	Rocky Terrestrial	1.21	119.90	4.176	694	2014
Kepler-415 c	Sub-Neptune	2.01	4.70	8.708	543	2014

Kepler-415 b Planet Profile

Physical Specs

Radius

1.21 R⊕

Radius (Jupiter)

0.108 R♃

Mass

119.90 M⊕

Mass (Jupiter)

0.377 M♃

Density

372.00 g/cm³

Surface Gravity

81.89 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.135

HZ Position Inner

Controversial No

Discovery

Year 2014

Method Transit Timing Variations

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#56of 570

top 9.6%

This planet

1.21R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

Kepler-169 c 1.21 R⊕ Kepler-189 b 1.21 R⊕ Kepler-81 d 1.21 R⊕

Metric	Earth	Kepler-415 b	Jupiter
Radius (R⊕)	1.00	1.21	11.21
Mass (M⊕)	1.00	119.90	317.83
Density (g/cm³)	5.51	372.00	1.33
Surface Gravity (g)	1.00	81.89	2.53
Insolation (S⊕)	1.00	69.83	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	119.900 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 138365520

Gaia DR2

Gaia DR2 2052280548230453760

Gaia DR3

Gaia DR3 2052280548230453760

System

Kepler-415

Percentile among Rocky Terrestrial cohort

Radius 1.210 R⊕ · percentile 87 / cohort 570

Mass 119.900 M⊕ · percentile 99 / cohort 570

Orbital period 4.18 d · percentile 47 / cohort 567

Distance 530.49 pc · percentile 67 / cohort 566

ESI 0.135 · percentile 3 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

4.176 days

Semi-major axis

0.0426 AU

Eccentricity

0.000

Inclination

89.41 °

Year Length

A year here lasts approximately 4.18 Earth days (1.1% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0426 AU.

Transit Fingerprint

Depth

0.053 %

Duration

2.358 h

Impact parameter b

0.142

Rp / R★

0.020401

Transit midpoint (BJD)

2,455,185.9956

Photometric dip

Transit produces a flux drop of 532 ppm lasting ≈ 2.36 h.

Extended Orbital Architecture

Planet / star radius ratio

0.020401

Semi-major axis / stellar radius

13.820

Impact parameter (b)

0.142

Transit mid-time (BJD)

2,455,185.9956

Angular separation (arcsec)

0.08030

Eq. Temperature

694K

(421 °C)

Insolation (S⊕)

69.83

Earth = 1.00

Earth Similarity (ESI)

0.135

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water. Close-orbiting tidally-locked around a cool host.

Detection Signatures

Transit photometry

A transit dip has been observed from at least one telescope.

Transit timing variations

Gravitational interactions from neighbours have been detected.

Discovery Paper

Primary reference

Hadden et al. 2014

Instrument

Kepler CCD Array

Publication

2014-05

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-415

Spectral Class

K-type orange

Effective Temperature

4,362 K — cooler than the Sun (5,778 K)

Estimated Age

4.90 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

0.643 R☉

Stellar Mass

0.670 M☉

Metallicity [Fe/H]

0.01

Extended Stellar Properties

Surface gravity (log g)

4.620 dex

Stellar density

2.408 g/cm³

Metallicity ratio

[Fe/H]

Distance

530.49 parsec

Light-years 1,730.22 ly

V-band magnitude

16.14 mag

Voyager-speed travel 30,512,343 yr

Multi-band Host Photometry — 12 bands

Astrometric Data

Parallax

1.857 mas

Total Proper Motion

21.469 mas/yr

PM Right Ascension

15.75 mas/yr

PM Declination

-14.58 mas/yr

Galactic Cartesian (pc)

x = 0.315 · y = -0.715 · z = 0.624

Equatorial (J2000)

RA 293.80450° · Dec 38.63905°

Galactic ℓ, b

72.037° · 8.785°

Ecliptic λ, β

307.737° · 58.999°

HTM-20 index

1118060500