Key parameters at a glance

A radius of 2.69 Earth radii
A mass of 7.70 Earth masses
Surface gravity around 1.06 g
An orbital period of 13.193 days
Semi-major axis 0.1160 AU
Equilibrium temperature 862 K (589 °C)
Distance from Earth 4,382.23 light-years
Earth Similarity Index 0.285
Travel time at Voyager 1 speed 77,280,657 years

1 sibling around Kepler-168

Kepler-168 c 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-168 b	Super-Earth	1.46	2.73	4.425	1,240	2014
Kepler-168 c this	Sub-Neptune	2.69	7.70	13.193	862	2014

Kepler-168 c Planet Profile

Physical Specs

Radius

2.69 R⊕

Radius (Jupiter)

0.240 R♃

Mass

7.70 M⊕

Mass (Jupiter)

0.024 M♃

Density

2.17 g/cm³

Surface Gravity

1.06 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.285

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

#881of 1978

top 44.5%

This planet

2.69R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-1369 b 2.69 R⊕ Kepler-417 c 2.69 R⊕ HD 28109 b 2.69 R⊕

Metric	Earth	Kepler-168 c	Jupiter
Radius (R⊕)	1.00	2.69	11.21
Mass (M⊕)	1.00	7.70	317.83
Density (g/cm³)	5.51	2.17	1.33
Surface Gravity (g)	1.00	1.06	2.53
Insolation (S⊕)	1.00	169.00	0.037

Star Catalogue Identifiers

TIC

TIC 378087276

Gaia DR2

Gaia DR2 2076454926274192128

Gaia DR3

Gaia DR3 2076454926274192128

System

Kepler-168

Percentile among Sub-Neptune cohort

Radius 2.690 R⊕ · percentile 55 / cohort 1978

Mass 7.700 M⊕ · percentile 51 / cohort 1978

Orbital period 13.19 d · percentile 45 / cohort 1946

Distance 1,343.60 pc · percentile 90 / cohort 1975

ESI 0.285 · percentile 24 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

13.193 days

Semi-major axis

0.1160 AU

Eccentricity

0.000

Inclination

89.99 °

Year Length

A year here lasts approximately 13.19 Earth days (3.6% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1160 AU.

Transit Fingerprint

Depth

0.059 %

Duration

4.936 h

Impact parameter b

0.020

Rp / R★

0.024530

Transit midpoint (BJD)

2,455,008.6093

Photometric dip

Transit produces a flux drop of 586 ppm lasting ≈ 4.94 h.

Extended Orbital Architecture

Planet / star radius ratio

0.024530

Semi-major axis / stellar radius

20.595

Impact parameter (b)

0.020

Transit mid-time (BJD)

2,455,008.6093

Angular separation (arcsec)

0.08630

Eq. Temperature

862K

(589 °C)

Insolation (S⊕)

169.00

Earth = 1.00

Earth Similarity (ESI)

0.285

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water.

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-168

Spectral Class

F-type yellow-white

Effective Temperature

6,282 K — hotter than the Sun (5,778 K)

Estimated Age

2.29 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.107 R☉

Stellar Mass

1.113 M☉

Metallicity [Fe/H]

0.09

Extended Stellar Properties

Surface gravity (log g)

4.422 dex

Stellar density

0.967 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,343.60 parsec

Light-years 4,382.23 ly

V-band magnitude

14.84 mag

Voyager-speed travel 77,280,657 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.716 mas

Total Proper Motion

10.396 mas/yr

PM Right Ascension

-3.44 mas/yr

PM Declination

-9.81 mas/yr

Galactic Cartesian (pc)

x = 0.321 · y = -0.698 · z = 0.640

Equatorial (J2000)

RA 294.71018° · Dec 39.82504°

Galactic ℓ, b

73.430° · 8.723°

Ecliptic λ, β

309.795° · 59.896°

HTM-20 index

1144170055