Key parameters at a glance

A radius of 1.20 Earth radii
A mass of 1.87 Earth masses
Surface gravity around 1.30 g
An orbital period of 6.739 days
Semi-major axis 0.0560 AU
Equilibrium temperature 579 K (306 °C)
Distance from Earth 1,830.06 light-years
Earth Similarity Index 0.541
Travel time at Voyager 1 speed 32,273,187 years
Almost certainly tidally locked to its host star given the close orbit

1 sibling around Kepler-225

Kepler-225 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-225 b this	Rocky Terrestrial	1.20	1.87	6.739	579	2014
Kepler-225 c	Super-Earth	1.84	4.04	18.794	412	2014

Kepler-225 b Planet Profile

Physical Specs

Radius

1.20 R⊕

Radius (Jupiter)

0.107 R♃

Mass

1.87 M⊕

Mass (Jupiter)

0.006 M♃

Density

5.95 g/cm³

Surface Gravity

1.30 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.541

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

#75of 570

top 13.0%

This planet

1.20R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

Kepler-282 c 1.20 R⊕ Kepler-367 c 1.20 R⊕ Kepler-208 d 1.20 R⊕

Metric	Earth	Kepler-225 b	Jupiter
Radius (R⊕)	1.00	1.20	11.21
Mass (M⊕)	1.00	1.87	317.83
Density (g/cm³)	5.51	5.95	1.33
Surface Gravity (g)	1.00	1.30	2.53
Insolation (S⊕)	1.00	38.88	0.037

Star Catalogue Identifiers

TIC

TIC 63203294

Gaia DR2

Gaia DR2 2128469007448159232

Gaia DR3

Gaia DR3 2128469007448159232

System

Kepler-225

Percentile among Rocky Terrestrial cohort

Radius 1.200 R⊕ · percentile 84 / cohort 570

Mass 1.870 M⊕ · percentile 77 / cohort 570

Orbital period 6.74 d · percentile 65 / cohort 567

Distance 561.10 pc · percentile 69 / cohort 566

ESI 0.541 · percentile 74 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

6.739 days

Semi-major axis

0.0560 AU

Eccentricity

0.000

Inclination

89.87 °

Year Length

A year here lasts approximately 6.74 Earth days (1.8% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0560 AU.

Transit Fingerprint

Depth

0.060 %

Duration

3.018 h

Impact parameter b

0.450

Rp / R★

0.022440

Transit midpoint (BJD)

2,454,968.2766

Photometric dip

Transit produces a flux drop of 601 ppm lasting ≈ 3.02 h.

Extended Orbital Architecture

Planet / star radius ratio

0.022440

Semi-major axis / stellar radius

18.694

Impact parameter (b)

0.450

Transit mid-time (BJD)

2,454,968.2766

Angular separation (arcsec)

0.09980

Eq. Temperature

579K

(306 °C)

Insolation (S⊕)

38.88

Earth = 1.00

Earth Similarity (ESI)

0.541

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.

Discovery Paper

Primary reference

Rowe et al. 2014

Instrument

Kepler CCD Array

Publication

2014-03

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-225

Spectral Class

M-type red dwarf

Effective Temperature

3,682 K — cooler than the Sun (5,778 K)

Estimated Age

2.88 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.480 R☉

Stellar Mass

0.593 M☉

Metallicity [Fe/H]

-0.04

Extended Stellar Properties

Surface gravity (log g)

4.783 dex

Stellar density

2.721 g/cm³

Metallicity ratio

[Fe/H]

Distance

561.10 parsec

Light-years 1,830.06 ly

V-band magnitude

16.29 mag

Voyager-speed travel 32,273,187 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.754 mas

Total Proper Motion

6.124 mas/yr

PM Right Ascension

-3.90 mas/yr

PM Declination

-4.72 mas/yr

Galactic Cartesian (pc)

x = 0.255 · y = -0.626 · z = 0.737

Equatorial (J2000)

RA 292.19398° · Dec 47.45708°

Galactic ℓ, b

79.540° · 13.789°

Ecliptic λ, β

312.233° · 67.669°

HTM-20 index

-109993995