Key parameters at a glance

A radius of 1.19 Earth radii
A mass of 1.93 Earth masses
Surface gravity around 1.36 g
An orbital period of 0.669 days
Semi-major axis 0.0153 AU
Equilibrium temperature 1,983 K (1710 °C)
Distance from Earth 1,103.61 light-years
Earth Similarity Index 0.141
Travel time at Voyager 1 speed 19,462,118 years

1 sibling around Kepler-407

Kepler-407 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-407 b this	Rocky Terrestrial	1.19	1.93	0.669	1,983	2014
Kepler-407 c	Gas Giant	12.30	4,000.00	3,000.000	—	2014

Kepler-407 b Planet Profile

Physical Specs

Radius

1.19 R⊕

Radius (Jupiter)

0.106 R♃

Mass

1.93 M⊕

Mass (Jupiter)

0.006 M♃

Density

5.88 g/cm³

Surface Gravity

1.36 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.141

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

#101of 570

top 17.5%

This planet

1.19R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

KOI-351 c 1.19 R⊕ Kepler-953 c 1.19 R⊕ Kepler-310 b 1.19 R⊕

Metric	Earth	Kepler-407 b	Jupiter
Radius (R⊕)	1.00	1.19	11.21
Mass (M⊕)	1.00	1.93	317.83
Density (g/cm³)	5.51	5.88	1.33
Surface Gravity (g)	1.00	1.36	2.53
Insolation (S⊕)	1.00	4,102.01	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	1.930 M⊕	Direct mass measurement (not derived).
Minimum mass (M sin i)	1.669 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

TIC

TIC 405688133

Gaia DR2

Gaia DR2 2132086400701217792

Gaia DR3

Gaia DR3 2132086400701217792

System

Kepler-407

Percentile among Rocky Terrestrial cohort

Radius 1.190 R⊕ · percentile 80 / cohort 570

Mass 1.930 M⊕ · percentile 82 / cohort 570

Orbital period 0.67 d · percentile 5 / cohort 567

Distance 338.37 pc · percentile 45 / cohort 566

ESI 0.141 · percentile 4 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

0.669 days

Semi-major axis

0.0153 AU

Eccentricity

0.000

Inclination

87.19 °

Year Length

A year here lasts roughly 16.1 hours long on a nearly circular orbit at a mean orbital distance of 0.0153 AU.

Transit Fingerprint

Depth

0.013 %

Duration

1.602 h

Impact parameter b

0.685

Rp / R★

0.010404

Transit midpoint (BJD)

2,454,967.1201

Photometric dip

Transit produces a flux drop of 132 ppm lasting ≈ 1.60 h.

Extended Orbital Architecture

Planet / star radius ratio

0.010404

Semi-major axis / stellar radius

3.193

Impact parameter (b)

0.685

RV semi-amplitude (K)

1.410 m/s

Transit mid-time (BJD)

2,454,967.1201

Angular separation (arcsec)

0.04520

Eq. Temperature

1,983K

(1710 °C)

Insolation (S⊕)

4,102.01

Earth = 1.00

Earth Similarity (ESI)

0.141

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-407

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,487 K — cooler than the Sun (5,778 K)

Estimated Age

2.88 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.040 R☉

Stellar Mass

0.990 M☉

Metallicity [Fe/H]

0.35

Extended Stellar Properties

Surface gravity (log g)

4.300 dex

Stellar density

1.000 g/cm³

Systemic radial velocity

-24.13 km/s

Rotational v·sin i

2.00 km/s

Metallicity ratio

[Fe/H]

Distance

338.37 parsec

Light-years 1,103.61 ly

V-band magnitude

12.60 mag

Voyager-speed travel 19,462,118 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

2.927 mas

Total Proper Motion

3.580 mas/yr

PM Right Ascension

-3.54 mas/yr

PM Declination

-0.52 mas/yr

Galactic Cartesian (pc)

x = 0.179 · y = -0.623 · z = 0.762

Equatorial (J2000)

RA 286.03630° · Dec 49.61450°

Galactic ℓ, b

79.954° · 18.383°

Ecliptic λ, β

303.700° · 71.182°

HTM-20 index

-377334373