Key parameters at a glance

A radius of 2.49 Earth radii
A mass of 2.00 Earth masses
Surface gravity around 0.32 g
An orbital period of 46.689 days
Semi-major axis 0.2500 AU
Equilibrium temperature 513 K (240 °C)
Distance from Earth 2,108.10 light-years
Earth Similarity Index 0.386
Travel time at Voyager 1 speed 37,176,275 years

5 siblings around Kepler-11

Kepler-11 f 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	Neptune-like	4.19	8.00	32.000	582	2010
Kepler-11 f this	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 f Planet Profile

Physical Specs

Radius

2.49 R⊕

Radius (Jupiter)

0.222 R♃

Mass

2.00 M⊕

Mass (Jupiter)

0.006 M♃

Density

0.69 g/cm³

Surface Gravity

0.32 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.386

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

#1191of 1978

top 60.2%

This planet

2.49R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-184 d 2.49 R⊕ Kepler-342 d 2.49 R⊕ HD 176986 d 2.49 R⊕

Metric	Earth	Kepler-11 f	Jupiter
Radius (R⊕)	1.00	2.49	11.21
Mass (M⊕)	1.00	2.00	317.83
Density (g/cm³)	5.51	0.69	1.33
Surface Gravity (g)	1.00	0.32	2.53
Insolation (S⊕)	1.00	19.53	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	2.000 M⊕	Direct mass measurement (not derived).
Minimum mass (M sin i)	18.466 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 Sub-Neptune cohort

Radius 2.490 R⊕ · percentile 39 / cohort 1978

Mass 2.000 M⊕ · percentile 0 / cohort 1978

Orbital period 46.69 d · percentile 84 / cohort 1946

Distance 646.35 pc · percentile 56 / cohort 1975

ESI 0.386 · percentile 49 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

46.689 days

Semi-major axis

0.2500 AU

Eccentricity

0.013

Inclination

89.47 °

Year Length

A year here lasts approximately 46.69 Earth days (12.8% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.2500 AU.

Transit Fingerprint

Depth

0.055 %

Duration

6.431 h

Impact parameter b

0.463

Rp / R★

0.021690

Transit midpoint (BJD)

2,455,618.2710

Photometric dip

Transit produces a flux drop of 548 ppm lasting ≈ 6.43 h.

Extended Orbital Architecture

Planet / star radius ratio

0.021690

Semi-major axis / stellar radius

50.790

Impact parameter (b)

0.463

RV semi-amplitude (K)

3.310 m/s

Transit mid-time (BJD)

2,455,618.2710

Long. of periastron (ω)

8.58°

Angular separation (arcsec)

0.38700

Eq. Temperature

513K

(240 °C)

Insolation (S⊕)

19.53

Earth = 1.00

Earth Similarity (ESI)

0.386

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 d · Sub-Neptune Kepler-11 e · Neptune-like 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