Key parameters at a glance

A radius of 2.18 Earth radii
A mass of 26.70 Earth masses
Surface gravity around 5.62 g
An orbital period of 17.461 days
Semi-major axis 0.1240 AU
Equilibrium temperature 568 K (295 °C)
Distance from Earth 2,809.92 light-years
Earth Similarity Index 0.431
Travel time at Voyager 1 speed 49,552,972 years
Almost certainly tidally locked to its host star given the close orbit

3 siblings around Kepler-245

Kepler-245 c 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-245 e	Super-Earth	1.75	1,806.36	3.220	998	2016
Kepler-245 b	Sub-Neptune	2.57	146.78	7.490	753	2014
Kepler-245 c this	Sub-Neptune	2.18	26.70	17.461	568	2014
Kepler-245 d	Sub-Neptune	3.03	21.60	36.277	445	2014

Kepler-245 c Planet Profile

Physical Specs

Radius

2.18 R⊕

Radius (Jupiter)

0.194 R♃

Mass

26.70 M⊕

Mass (Jupiter)

0.084 M♃

Density

9.40 g/cm³

Surface Gravity

5.62 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.431

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

#1703of 1978

top 86.0%

This planet

2.18R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

GJ 3090 b 2.18 R⊕ Kepler-261 b 2.18 R⊕ Kepler-250 d 2.18 R⊕

Metric	Earth	Kepler-245 c	Jupiter
Radius (R⊕)	1.00	2.18	11.21
Mass (M⊕)	1.00	26.70	317.83
Density (g/cm³)	5.51	9.40	1.33
Surface Gravity (g)	1.00	5.62	2.53
Insolation (S⊕)	1.00	25.15	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	26.700 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 63004906

Gaia DR2

Gaia DR2 2101768089124657664

Gaia DR3

Gaia DR3 2101768089124657664

System

Kepler-245

Percentile among Sub-Neptune cohort

Radius 2.180 R⊕ · percentile 13 / cohort 1978

Mass 26.700 M⊕ · percentile 96 / cohort 1978

Orbital period 17.46 d · percentile 57 / cohort 1946

Distance 861.53 pc · percentile 70 / cohort 1975

ESI 0.431 · percentile 59 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

17.461 days

Semi-major axis

0.1240 AU

Eccentricity

0.000

Inclination

89.31 °

Year Length

A year here lasts approximately 17.46 Earth days (4.8% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1240 AU.

Transit Fingerprint

Depth

0.088 %

Duration

2.244 h

Impact parameter b

0.200

Rp / R★

0.026535

Transit midpoint (BJD)

2,454,970.2644

Photometric dip

Transit produces a flux drop of 875 ppm lasting ≈ 2.24 h.

Extended Orbital Architecture

Planet / star radius ratio

0.026535

Semi-major axis / stellar radius

60.310

Impact parameter (b)

0.200

Transit mid-time (BJD)

2,454,970.2644

Angular separation (arcsec)

0.14400

Eq. Temperature

568K

(295 °C)

Insolation (S⊕)

25.15

Earth = 1.00

Earth Similarity (ESI)

0.431

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

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-245

Spectral Class

K-type orange

Effective Temperature

5,100 K — cooler than the Sun (5,778 K)

Estimated Age

3.63 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.795 R☉

Stellar Mass

0.856 M☉

Metallicity [Fe/H]

0.12

Extended Stellar Properties

Surface gravity (log g)

4.560 dex

Stellar density

1.700 g/cm³

Metallicity ratio

[Fe/H]

Distance

861.53 parsec

Light-years 2,809.92 ly

V-band magnitude

15.55 mag

Voyager-speed travel 49,552,972 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.133 mas

Total Proper Motion

6.121 mas/yr

PM Right Ascension

3.71 mas/yr

PM Declination

4.87 mas/yr

Galactic Cartesian (pc)

x = 0.272 · y = -0.686 · z = 0.675

Equatorial (J2000)

RA 291.63900° · Dec 42.43635°

Galactic ℓ, b

74.722° · 11.972°

Ecliptic λ, β

307.008° · 63.122°

HTM-20 index

-339621301

Similar Worlds

Kepler-113 c

Sub-Neptune · K-type orange

Radius 2.18 R⊕ · 855.7 ly

Kepler-250 d

Sub-Neptune · K-type orange

Radius 2.18 R⊕ · 2,480.7 ly

Kepler-261 b

Sub-Neptune · K-type orange

Radius 2.18 R⊕ · 1,035.5 ly

TOI-238 c

Sub-Neptune · K-type orange

Radius 2.18 R⊕ · 262.7 ly

Kepler-662 b

Sub-Neptune · K-type orange

Radius 2.18 R⊕ · 2,660.2 ly

K2-379 b

Sub-Neptune · K-type orange

Radius 2.18 R⊕ · 594.3 ly

Explore Related Categories

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