Key parameters at a glance

A radius of 11.20 Earth radii
A mass of 86.45 Earth masses
Surface gravity around 0.69 g
An orbital period of 3,455.000 days
Semi-major axis 4.6000 AU
Distance from Earth 470.21 light-years
Earth Similarity Index 0.283
Travel time at Voyager 1 speed 8,292,083 years

3 siblings around Kepler-68

Kepler-68 e 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-68 b	Sub-Neptune	2.36	8.03	5.399	1,275	2013
Kepler-68 c	Rocky Terrestrial	0.98	1.30	9.605	1,052	2013
Kepler-68 d	Gas Giant	13.90	267.00	632.620	—	2013
Kepler-68 e this	Gas Giant	11.20	86.45	3,455.000	—	2023

Kepler-68 e Planet Profile

Physical Specs

Radius

11.20 R⊕

Radius (Jupiter)

0.997 R♃

Mass

86.45 M⊕

Mass (Jupiter)

0.272 M♃

Density

0.34 g/cm³

Surface Gravity

0.69 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.283

HZ Position Unknown

Controversial No

Discovery

Year 2023

Method Radial Velocity

Facility Roque de los Muchachos Observatory

Telescope 3.58 m Telescopio Nazionale Galileo

Size rank in cohort

Rank by radius

#1638of 1771

top 92.4%

This planet

11.20R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

WASP-80 b 11.20 R⊕ HD 114082 b 11.21 R⊕ TOI-4406 b 11.21 R⊕

Metric	Earth	Kepler-68 e	Jupiter
Radius (R⊕)	1.00	11.20	11.21
Mass (M⊕)	1.00	86.45	317.83
Density (g/cm³)	5.51	0.34	1.33
Surface Gravity (g)	1.00	0.69	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Minimum mass (M sin i)	86.449 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

TIC

TIC 417676622

Gaia DR2

Gaia DR2 2129550445852902656

Gaia DR3

Gaia DR3 2129550445852902656

System

Kepler-68

Percentile among Gas Giant cohort

Radius 11.200 R⊕ · percentile 8 / cohort 1771

Mass 86.449 M⊕ · percentile 4 / cohort 1747

Orbital period 3,455.00 d · percentile 90 / cohort 1533

Distance 144.17 pc · percentile 43 / cohort 1759

ESI 0.283 · percentile 53 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

3,455.000 days

Semi-major axis

4.6000 AU

Eccentricity

0.330

Inclination

— °

Year Length

A year here lasts about 9.46 Earth years on a highly eccentric trajectory at a mean orbital distance of 4.6000 AU.

Extended Orbital Architecture

RV semi-amplitude (K)

3.730 m/s

Transit mid-time (BJD)

2,457,791.0000

Long. of periastron (ω)

196.00°

Angular separation (arcsec)

31.90000

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.283

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Bonomo et al. 2023

Instrument

HARPS-N Spectrograph

Publication

2023-04

Observation locale

Ground

Discovery cohort

Planets confirmed in 2023 at Roque de los Muchachos Observatory (7 shown).

GJ 9404 b · Sub-Neptune Kepler-10 d · Sub-Neptune HD 99492 c · Neptune-like GJ 328 c · Neptune-like K2-312 c · Gas Giant Kepler-454 d · Gas Giant TOI-4010 e · Gas Giant

Host System: Kepler-68

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,847 K — hotter than the Sun (5,778 K)

Estimated Age

6.84 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.256 R☉

Stellar Mass

1.057 M☉

Metallicity [Fe/H]

0.11

Extended Stellar Properties

Surface gravity (log g)

4.281 dex

Stellar density

0.790 g/cm³

Systemic radial velocity

-20.90 km/s

Rotational v·sin i

0.50 km/s

Metallicity ratio

[Fe/H]

Distance

144.17 parsec

Light-years 470.21 ly

V-band magnitude

10.08 mag

Voyager-speed travel 8,292,083 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

6.908 mas

Total Proper Motion

12.750 mas/yr

PM Right Ascension

-7.33 mas/yr

PM Declination

-10.43 mas/yr

Galactic Cartesian (pc)

x = 0.235 · y = -0.612 · z = 0.755

Equatorial (J2000)

RA 291.03231° · Dec 49.04021°

Galactic ℓ, b

80.691° · 15.154°

Ecliptic λ, β

312.030° · 69.429°

HTM-20 index

861394382