Key parameters at a glance

A radius of 1.80 Earth radii
A mass of 1.90 Earth masses
Surface gravity around 0.59 g
An orbital period of 10.304 days
Semi-major axis 0.0910 AU
Equilibrium temperature 849 K (576 °C)
Distance from Earth 2,108.10 light-years
Earth Similarity Index 0.302
Travel time at Voyager 1 speed 37,176,275 years

5 siblings around Kepler-11

Kepler-11 b 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 this	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	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 b Planet Profile

Physical Specs

Radius

1.80 R⊕

Radius (Jupiter)

0.161 R♃

Mass

1.90 M⊕

Mass (Jupiter)

0.006 M♃

Density

1.72 g/cm³

Surface Gravity

0.59 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.302

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

#253of 1176

top 21.4%

This planet

1.80R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

PSR B1257+12 d 1.80 R⊕ Kepler-148 b 1.80 R⊕ Kepler-296 f 1.80 R⊕

Metric	Earth	Kepler-11 b	Jupiter
Radius (R⊕)	1.00	1.80	11.21
Mass (M⊕)	1.00	1.90	317.83
Density (g/cm³)	5.51	1.72	1.33
Surface Gravity (g)	1.00	0.59	2.53
Insolation (S⊕)	1.00	146.36	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	1.900 M⊕	Direct mass measurement (not derived).
Minimum mass (M sin i)	7.454 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 Super-Earth cohort

Radius 1.800 R⊕ · percentile 77 / cohort 1176

Mass 1.900 M⊕ · percentile 1 / cohort 1176

Orbital period 10.30 d · percentile 65 / cohort 1164

Distance 646.35 pc · percentile 58 / cohort 1171

ESI 0.302 · percentile 37 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

10.304 days

Semi-major axis

0.0910 AU

Eccentricity

0.045

Inclination

89.64 °

Year Length

A year here lasts approximately 10.30 Earth days (2.8% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0910 AU.

Transit Fingerprint

Depth

0.030 %

Duration

4.116 h

Impact parameter b

0.116

Rp / R★

0.015630

Transit midpoint (BJD)

2,455,589.7378

Photometric dip

Transit produces a flux drop of 301 ppm lasting ≈ 4.12 h.

Extended Orbital Architecture

Planet / star radius ratio

0.015630

Semi-major axis / stellar radius

18.550

Impact parameter (b)

0.116

RV semi-amplitude (K)

2.211 m/s

Transit mid-time (BJD)

2,455,589.7378

Long. of periastron (ω)

71.46°

Angular separation (arcsec)

0.14100

Eq. Temperature

849K

(576 °C)

Insolation (S⊕)

146.36

Earth = 1.00

Earth Similarity (ESI)

0.302

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 e · Neptune-like 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