Key parameters at a glance

A radius of 1.09 Earth radii
A mass of 1.32 Earth masses
Surface gravity around 1.11 g
An orbital period of 3.307 days
Semi-major axis 0.0350 AU
Equilibrium temperature 554 K (281 °C)
Distance from Earth 621.00 light-years
Earth Similarity Index 0.579
Travel time at Voyager 1 speed 10,951,410 years
Almost certainly tidally locked to its host star given the close orbit

2 siblings around Kepler-249

Kepler-249 b shares its host star with 2 other confirmed planets. Side-by-side measurements below.

Planet	Type	Radius (R⊕)	Mass (M⊕)	Period (d)	Eq. T (K)	Year
Kepler-249 b this	Rocky Terrestrial	1.09	1.32	3.307	554	2014
Kepler-249 c	Super-Earth	1.51	2.89	7.114	429	2014
Kepler-249 d	Super-Earth	1.57	3.09	15.368	332	2014

Kepler-249 b Planet Profile

Physical Specs

Radius

1.09 R⊕

Radius (Jupiter)

0.097 R♃

Mass

1.32 M⊕

Mass (Jupiter)

0.004 M♃

Density

5.60 g/cm³

Surface Gravity

1.11 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.579

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

#240of 570

top 41.9%

This planet

1.09R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

TOI-5720 b 1.09 R⊕ Kepler-115 b 1.09 R⊕ Kepler-212 b 1.09 R⊕

Metric	Earth	Kepler-249 b	Jupiter
Radius (R⊕)	1.00	1.09	11.21
Mass (M⊕)	1.00	1.32	317.83
Density (g/cm³)	5.51	5.60	1.33
Surface Gravity (g)	1.00	1.11	2.53
Insolation (S⊕)	1.00	24.26	0.037

Star Catalogue Identifiers

TIC

TIC 272942100

Gaia DR2

Gaia DR2 2078807228323035008

Gaia DR3

Gaia DR3 2078807228323035008

System

Kepler-249

Percentile among Rocky Terrestrial cohort

Radius 1.090 R⊕ · percentile 56 / cohort 570

Mass 1.320 M⊕ · percentile 51 / cohort 570

Orbital period 3.31 d · percentile 37 / cohort 567

Distance 190.40 pc · percentile 31 / cohort 566

ESI 0.579 · percentile 76 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

3.307 days

Semi-major axis

0.0350 AU

Eccentricity

0.000

Inclination

90.00 °

Year Length

A year here lasts approximately 3.31 Earth days (0.9% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0350 AU.

Transit Fingerprint

Depth

0.051 %

Duration

1.767 h

Impact parameter b

0.260

Rp / R★

0.020275

Transit midpoint (BJD)

2,454,967.3710

Photometric dip

Transit produces a flux drop of 509 ppm lasting ≈ 1.77 h.

Extended Orbital Architecture

Planet / star radius ratio

0.020275

Semi-major axis / stellar radius

14.190

Impact parameter (b)

0.260

Transit mid-time (BJD)

2,454,967.3710

Angular separation (arcsec)

0.18400

Eq. Temperature

554K

(281 °C)

Insolation (S⊕)

24.26

Earth = 1.00

Earth Similarity (ESI)

0.579

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-249

Spectral Class

M-type red dwarf

Effective Temperature

3,568 K — cooler than the Sun (5,778 K)

Estimated Age

3.86 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.482 R☉

Stellar Mass

0.510 M☉

Metallicity [Fe/H]

-0.34

Extended Stellar Properties

Surface gravity (log g)

4.777 dex

Stellar density

5.345 g/cm³

Metallicity ratio

[Fe/H]

Distance

190.40 parsec

Light-years 621.00 ly

V-band magnitude

16.37 mag

Voyager-speed travel 10,951,410 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

5.223 mas

Total Proper Motion

37.825 mas/yr

PM Right Ascension

33.52 mas/yr

PM Declination

17.52 mas/yr

Galactic Cartesian (pc)

x = 0.328 · y = -0.645 · z = 0.690

Equatorial (J2000)

RA 296.98530° · Dec 43.65860°

Galactic ℓ, b

77.658° · 9.071°

Ecliptic λ, β

316.008° · 62.853°

HTM-20 index

1531327809