Key parameters at a glance

A radius of 1.96 Earth radii
A mass of 4.50 Earth masses
Surface gravity around 1.17 g
An orbital period of 8.777 days
Semi-major axis 0.0770 AU
Distance from Earth 843.76 light-years
Earth Similarity Index 0.793
Travel time at Voyager 1 speed 14,879,748 years

K2-86 b Planet Profile

Physical Specs

Radius

1.96 R⊕

Radius (Jupiter)

0.175 R♃

Mass

4.50 M⊕

Mass (Jupiter)

0.014 M♃

Density

3.28 g/cm³

Surface Gravity

1.17 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.793

HZ Position Inner

Controversial No

Discovery

Year 2016

Method Transit

Facility K2

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#49of 1176

top 4.1%

This planet

1.96R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-174 b 1.96 R⊕ Kepler-792 b 1.96 R⊕ Kepler-118 b 1.96 R⊕

Metric	Earth	K2-86 b	Jupiter
Radius (R⊕)	1.00	1.96	11.21
Mass (M⊕)	1.00	4.50	317.83
Density (g/cm³)	5.51	3.28	1.33
Surface Gravity (g)	1.00	1.17	2.53
Insolation (S⊕)	1.00	78.00	0.037

Star Catalogue Identifiers

TIC

TIC 25958378

Gaia DR2

Gaia DR2 55994798604873216

Gaia DR3

Gaia DR3 55994798604873216

System

K2-86

Percentile among Super-Earth cohort

Radius 1.960 R⊕ · percentile 95 / cohort 1176

Mass 4.500 M⊕ · percentile 86 / cohort 1176

Orbital period 8.78 d · percentile 61 / cohort 1164

Distance 258.70 pc · percentile 28 / cohort 1171

ESI 0.793 · percentile 89 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

8.777 days

Semi-major axis

0.0770 AU

Eccentricity

—

Inclination

88.56 °

Year Length

A year here lasts approximately 8.78 Earth days (2.4% of a terrestrial year) at a mean orbital distance of 0.0770 AU.

Transit Fingerprint

Depth

0.087 %

Duration

2.750 h

Rp / R★

0.023400

Transit midpoint (BJD)

2,457,070.0173

Photometric dip

Transit produces a flux drop of 865 ppm lasting ≈ 2.75 h.

Extended Orbital Architecture

Planet / star radius ratio

0.023400

Semi-major axis / stellar radius

5.760

Transit mid-time (BJD)

2,457,070.0173

Angular separation (arcsec)

0.29800

Eq. Temperature

—

Insolation (S⊕)

78.00

Earth = 1.00

Earth Similarity (ESI)

0.793

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Crossfield et al. 2016

Instrument

Kepler CCD Array

Publication

2016-09

Observation locale

Space

Discovery cohort

Planets confirmed in 2016 at K2 (12 shown).

K2-72 d · Rocky Terrestrial K2-72 b · Rocky Terrestrial K2-91 b · Rocky Terrestrial K2-72 c · Rocky Terrestrial K2-102 b · Super-Earth K2-90 c · Super-Earth K2-72 e · Super-Earth K2-83 b · Rocky Terrestrial K2-88 b · Rocky Terrestrial K2-80 c · Super-Earth K2-83 c · Super-Earth K2-65 b · Super-Earth

Host System: K2-86

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,482 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.760 R☉

Stellar Mass

0.790 M☉

Metallicity [Fe/H]

-0.35

Extended Stellar Properties

Surface gravity (log g)

4.579 dex

Stellar density

2.161 g/cm³

Systemic radial velocity

122.52 km/s

Metallicity ratio

[Fe/H]

Distance

258.70 parsec

Light-years 843.76 ly

V-band magnitude

13.04 mag

Voyager-speed travel 14,879,748 yr

Multi-band Host Photometry — 12 bands

Astrometric Data

Parallax

3.837 mas

Total Proper Motion

68.377 mas/yr

PM Right Ascension

67.75 mas/yr

PM Declination

-9.25 mas/yr

Galactic Cartesian (pc)

x = 0.589 · y = 0.742 · z = 0.320

Equatorial (J2000)

RA 51.55311° · Dec 18.63557°

Galactic ℓ, b

166.552° · -30.831°

Ecliptic λ, β

53.897° · -0.116°

HTM-20 index

-2011296984