Key parameters at a glance

A radius of 4.19 Earth radii
A mass of 8.00 Earth masses
Surface gravity around 0.46 g
An orbital period of 32.000 days
Semi-major axis 0.1950 AU
Equilibrium temperature 582 K (309 °C)
Distance from Earth 2,108.10 light-years
Earth Similarity Index 0.306
Travel time at Voyager 1 speed 37,176,275 years

5 siblings around Kepler-11

Kepler-11 e shares its host star with 5 other confirmed planets. Side-by-side measurements below.

Planet	Type	Radius (R⊕)	Mass (M⊕)	Period (d)	Eq. T (K)	Year
Kepler-11 b	Super-Earth	1.80	1.90	10.304	849	2010
Kepler-11 c	Sub-Neptune	2.87	2.90	13.024	786	2010
Kepler-11 d	Sub-Neptune	3.12	7.30	22.685	653	2010
Kepler-11 e this	Neptune-like	4.19	8.00	32.000	582	2010
Kepler-11 f	Sub-Neptune	2.49	2.00	46.689	513	2010
Kepler-11 g	Sub-Neptune	3.33	25.00	118.381	376	2010

Kepler-11 e Planet Profile

Physical Specs

Radius

4.19 R⊕

Radius (Jupiter)

0.374 R♃

Mass

8.00 M⊕

Mass (Jupiter)

0.025 M♃

Density

0.58 g/cm³

Surface Gravity

0.46 g (Earth)

Classification

Planet Type

Neptune-like

ESI Score 0.306

HZ Position Inner

Controversial No

Discovery

Year 2010

Method Transit

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#520of 574

top 90.4%

This planet

4.19R⊕

Neptune-like median

6.39R⊕

Nearest-size peers

Kepler-610 b 4.19 R⊕ KMT-2023-BLG-1896L b 4.19 R⊕ K2-198 b 4.19 R⊕

Metric	Earth	Kepler-11 e	Jupiter
Radius (R⊕)	1.00	4.19	11.21
Mass (M⊕)	1.00	8.00	317.83
Density (g/cm³)	5.51	0.58	1.33
Surface Gravity (g)	1.00	0.46	2.53
Insolation (S⊕)	1.00	32.34	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	8.000 M⊕	Direct mass measurement (not derived).
Minimum mass (M sin i)	7.949 M⊕	Lower bound from radial-velocity fitting.

Star Catalogue Identifiers

TIC

TIC 169175503

Gaia DR2

Gaia DR2 2076960598545789824

Gaia DR3

Gaia DR3 2076960598545789824

System

Kepler-11

Percentile among Neptune-like cohort

Radius 4.190 R⊕ · percentile 9 / cohort 574

Mass 8.000 M⊕ · percentile 3 / cohort 574

Orbital period 32.00 d · percentile 61 / cohort 524

Distance 646.35 pc · percentile 62 / cohort 572

ESI 0.306 · percentile 51 / cohort 574

Orbit & Habitability

Orbital Dynamics

Period

32.000 days

Semi-major axis

0.1950 AU

Eccentricity

0.012

Inclination

88.89 °

Year Length

A year here lasts approximately 32.00 Earth days (8.8% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1950 AU.

Transit Fingerprint

Depth

0.133 %

Duration

4.165 h

Impact parameter b

0.763

Rp / R★

0.036430

Transit midpoint (BJD)

2,455,595.0755

Photometric dip

Transit produces a flux drop of 1,333 ppm lasting ≈ 4.17 h.

Extended Orbital Architecture

Planet / star radius ratio

0.036430

Semi-major axis / stellar radius

39.480

Impact parameter (b)

0.763

RV semi-amplitude (K)

1.616 m/s

Transit mid-time (BJD)

2,455,595.0755

Long. of periastron (ω)

204.69°

Angular separation (arcsec)

0.30200

Eq. Temperature

582K

(309 °C)

Insolation (S⊕)

32.34

Earth = 1.00

Earth Similarity (ESI)

0.306

0 = alien, 1 = Earth-identical

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

Detection Signatures

Transit photometry

A transit dip has been observed from at least one telescope.

Radial velocity

Stellar wobble has been measured spectroscopically.

Transit timing variations

Gravitational interactions from neighbours have been detected.

Discovery Paper

Primary reference

Lissauer et al. 2011

Instrument

Kepler CCD Array

Publication

2011-02

Observation locale

Space

Discovery cohort

Planets confirmed in 2010 at Kepler (11 shown).

Kepler-11 g · Sub-Neptune Kepler-11 f · Sub-Neptune Kepler-11 d · Sub-Neptune Kepler-11 b · Super-Earth Kepler-9 c · Neptune-like Kepler-11 c · Sub-Neptune Kepler-9 b · Neptune-like Kepler-9 d · Super-Earth Kepler-40 b · Gas Giant Kepler-8 b · Gas Giant KOI-217 b · Gas Giant

Host System: Kepler-11

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,663 K — cooler than the Sun (5,778 K)

Estimated Age

8.50 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.065 R☉

Stellar Mass

0.961 M☉

Metallicity [Fe/H]

0.05

Extended Stellar Properties

Surface gravity (log g)

4.366 dex

Stellar density

1.122 g/cm³

Systemic radial velocity

-57.16 km/s

Rotational v·sin i

0.40 km/s

Metallicity ratio

[Fe/H]

Distance

646.35 parsec

Light-years 2,108.10 ly

V-band magnitude

13.82 mag

Voyager-speed travel 37,176,275 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.518 mas

Total Proper Motion

7.069 mas/yr

PM Right Ascension

-0.04 mas/yr

PM Declination

-7.07 mas/yr

Galactic Cartesian (pc)

x = 0.339 · y = -0.662 · z = 0.668

Equatorial (J2000)

RA 297.11509° · Dec 41.90911°

Galactic ℓ, b

76.161° · 8.133°

Ecliptic λ, β

314.755° · 61.202°

HTM-20 index

-842633374