Key parameters at a glance

A radius of 2.15 Earth radii
A mass of 5.27 Earth masses
Surface gravity around 1.14 g
An orbital period of 11.254 days
Semi-major axis 0.0991 AU
Equilibrium temperature 888 K (615 °C)
Distance from Earth 4,417.65 light-years
Earth Similarity Index 0.300
Travel time at Voyager 1 speed 77,905,299 years

Kepler-1286 b Planet Profile

Physical Specs

Radius

2.15 R⊕

Radius (Jupiter)

0.192 R♃

Mass

5.27 M⊕

Mass (Jupiter)

0.017 M♃

Density

2.91 g/cm³

Surface Gravity

1.14 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.300

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

#1741of 1978

top 88.0%

This planet

2.15R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-252 c 2.15 R⊕ Kepler-254 c 2.15 R⊕ Kepler-256 c 2.15 R⊕

Metric	Earth	Kepler-1286 b	Jupiter
Radius (R⊕)	1.00	2.15	11.21
Mass (M⊕)	1.00	5.27	317.83
Density (g/cm³)	5.51	2.91	1.33
Surface Gravity (g)	1.00	1.14	2.53
Insolation (S⊕)	1.00	151.77	0.037

Star Catalogue Identifiers

TIC

TIC 351766517

Gaia DR2

Gaia DR2 2116961690548889088

Gaia DR3

Gaia DR3 2116961690548889088

System

Kepler-1286

Percentile among Sub-Neptune cohort

Radius 2.150 R⊕ · percentile 11 / cohort 1978

Mass 5.270 M⊕ · percentile 12 / cohort 1978

Orbital period 11.25 d · percentile 39 / cohort 1946

Distance 1,354.46 pc · percentile 90 / cohort 1975

ESI 0.300 · percentile 28 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

11.254 days

Semi-major axis

0.0991 AU

Eccentricity

0.000

Inclination

87.68 °

Year Length

A year here lasts approximately 11.25 Earth days (3.1% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0991 AU.

Transit Fingerprint

Depth

0.043 %

Duration

4.679 h

Impact parameter b

0.029

Rp / R★

0.019944

Transit midpoint (BJD)

2,454,969.8890

Photometric dip

Transit produces a flux drop of 433 ppm lasting ≈ 4.68 h.

Extended Orbital Architecture

Planet / star radius ratio

0.019944

Semi-major axis / stellar radius

18.740

Impact parameter (b)

0.029

Transit mid-time (BJD)

2,454,969.8890

Angular separation (arcsec)

0.07320

Eq. Temperature

888K

(615 °C)

Insolation (S⊕)

151.77

Earth = 1.00

Earth Similarity (ESI)

0.300

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-1286

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,753 K — cooler than the Sun (5,778 K)

Estimated Age

4.17 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.980 R☉

Stellar Mass

1.000 M☉

Metallicity [Fe/H]

0.03

Extended Stellar Properties

Surface gravity (log g)

4.450 dex

Stellar density

0.984 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,354.46 parsec

Light-years 4,417.65 ly

V-band magnitude

15.28 mag

Voyager-speed travel 77,905,299 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.710 mas

Total Proper Motion

5.559 mas/yr

PM Right Ascension

-3.17 mas/yr

PM Declination

-4.57 mas/yr

Galactic Cartesian (pc)

x = 0.128 · y = -0.710 · z = 0.693

Equatorial (J2000)

RA 280.25837° · Dec 43.83574°

Galactic ℓ, b

72.784° · 20.178°

Ecliptic λ, β

288.871° · 66.604°

HTM-20 index

-948348333