Key parameters at a glance

A radius of 2.22 Earth radii
A mass of 5.56 Earth masses
Surface gravity around 1.13 g
An orbital period of 65.648 days
Semi-major axis 0.3197 AU
Equilibrium temperature 485 K (212 °C)
Distance from Earth 2,225.81 light-years
Earth Similarity Index 0.533
Travel time at Voyager 1 speed 39,252,086 years

Kepler-1151 b Planet Profile

Physical Specs

Radius

2.22 R⊕

Radius (Jupiter)

0.198 R♃

Mass

5.56 M⊕

Mass (Jupiter)

0.018 M♃

Density

2.79 g/cm³

Surface Gravity

1.13 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.533

HZ Position Inner

Controversial No

Discovery

Year 2016

Method Transit

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#1642of 1978

top 83.0%

This planet

2.22R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

KMT-2018-BLG-1988L b 2.22 R⊕ Kepler-938 b 2.22 R⊕ Kepler-1432 b 2.22 R⊕

Metric	Earth	Kepler-1151 b	Jupiter
Radius (R⊕)	1.00	2.22	11.21
Mass (M⊕)	1.00	5.56	317.83
Density (g/cm³)	5.51	2.79	1.33
Surface Gravity (g)	1.00	1.13	2.53
Insolation (S⊕)	1.00	4.86	0.037

Star Catalogue Identifiers

TIC

TIC 63204022

Gaia DR2

Gaia DR2 2129254333627658112

Gaia DR3

Gaia DR3 2129254333627658112

System

Kepler-1151

Percentile among Sub-Neptune cohort

Radius 2.220 R⊕ · percentile 17 / cohort 1978

Mass 5.560 M⊕ · percentile 17 / cohort 1978

Orbital period 65.65 d · percentile 90 / cohort 1946

Distance 682.44 pc · percentile 58 / cohort 1975

ESI 0.533 · percentile 75 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

65.648 days

Semi-major axis

0.3197 AU

Eccentricity

0.000

Inclination

88.43 °

Year Length

A year here lasts approximately 65.65 Earth days (18.0% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.3197 AU.

Transit Fingerprint

Depth

0.059 %

Duration

4.412 h

Impact parameter b

0.161

Rp / R★

0.023735

Transit midpoint (BJD)

2,455,006.3052

Photometric dip

Transit produces a flux drop of 589 ppm lasting ≈ 4.41 h.

Extended Orbital Architecture

Planet / star radius ratio

0.023735

Semi-major axis / stellar radius

114.900

Impact parameter (b)

0.161

Transit mid-time (BJD)

2,455,006.3052

Angular separation (arcsec)

0.46800

Eq. Temperature

485K

(212 °C)

Insolation (S⊕)

4.86

Earth = 1.00

Earth Similarity (ESI)

0.533

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

Morton et al. 2016

Instrument

Kepler CCD Array

Publication

2016-05

Observation locale

Space

Discovery cohort

Planets confirmed in 2016 at Kepler (12 shown).

Kepler-1512 b · Rocky Terrestrial Kepler-1410 b · Super-Earth Kepler-560 b · Super-Earth Kepler-1389 b · Super-Earth Kepler-1450 b · Super-Earth Kepler-1544 b · Super-Earth Kepler-1459 b · Super-Earth Kepler-1638 b · Super-Earth Kepler-737 b · Super-Earth Kepler-1185 b · Super-Earth Kepler-1178 b · Rocky Terrestrial Kepler-1040 b · Sub-Neptune

Host System: Kepler-1151

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,470 K — cooler than the Sun (5,778 K)

Estimated Age

4.37 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.850 R☉

Stellar Mass

0.880 M☉

Metallicity [Fe/H]

-0.11

Extended Stellar Properties

Surface gravity (log g)

4.530 dex

Stellar density

6.664 g/cm³

Metallicity ratio

[Fe/H]

Distance

682.44 parsec

Light-years 2,225.81 ly

V-band magnitude

15.01 mag

Voyager-speed travel 39,252,086 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.437 mas

Total Proper Motion

2.880 mas/yr

PM Right Ascension

2.26 mas/yr

PM Declination

-1.78 mas/yr

Galactic Cartesian (pc)

x = 0.254 · y = -0.621 · z = 0.742

Equatorial (J2000)

RA 292.24778° · Dec 47.87843°

Galactic ℓ, b

79.948° · 13.936°

Ecliptic λ, β

312.767° · 68.040°

HTM-20 index

-721293807