Key parameters at a glance

A radius of 4.64 Earth radii
A mass of 19.40 Earth masses
Surface gravity around 0.90 g
An orbital period of 150.242 days
Semi-major axis 0.5375 AU
Equilibrium temperature 327 K (54 °C)
Distance from Earth 3,899.33 light-years
Earth Similarity Index 0.542
Travel time at Voyager 1 speed 68,764,600 years

Kepler-867 b Planet Profile

Physical Specs

Radius

4.64 R⊕

Radius (Jupiter)

0.414 R♃

Mass

19.40 M⊕

Mass (Jupiter)

0.061 M♃

Density

1.07 g/cm³

Surface Gravity

0.90 g (Earth)

Classification

Planet Type

Neptune-like

ESI Score 0.542

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

#440of 574

top 76.5%

This planet

4.64R⊕

Neptune-like median

6.39R⊕

Nearest-size peers

Kepler-222 c 4.64 R⊕ Kepler-972 b 4.65 R⊕ Kepler-564 b 4.63 R⊕

Metric	Earth	Kepler-867 b	Jupiter
Radius (R⊕)	1.00	4.64	11.21
Mass (M⊕)	1.00	19.40	317.83
Density (g/cm³)	5.51	1.07	1.33
Surface Gravity (g)	1.00	0.90	2.53
Insolation (S⊕)	1.00	2.72	0.037

Star Catalogue Identifiers

TIC

TIC 399915645

Gaia DR2

Gaia DR2 2133767931937168512

Gaia DR3

Gaia DR3 2133767931937168512

System

Kepler-867

Percentile among Neptune-like cohort

Radius 4.640 R⊕ · percentile 23 / cohort 574

Mass 19.400 M⊕ · percentile 26 / cohort 574

Orbital period 150.24 d · percentile 87 / cohort 524

Distance 1,195.54 pc · percentile 78 / cohort 572

ESI 0.542 · percentile 99 / cohort 574

Orbit & Habitability

Orbital Dynamics

Period

150.242 days

Semi-major axis

0.5375 AU

Eccentricity

0.000

Inclination

89.81 °

Year Length

A year here lasts approximately 150.24 Earth days (41.1% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.5375 AU.

Transit Fingerprint

Depth

0.238 %

Duration

10.979 h

Impact parameter b

0.345

Rp / R★

0.047018

Transit midpoint (BJD)

2,454,971.2872

Photometric dip

Transit produces a flux drop of 2,379 ppm lasting ≈ 10.98 h.

Extended Orbital Architecture

Planet / star radius ratio

0.047018

Semi-major axis / stellar radius

104.300

Impact parameter (b)

0.345

Transit mid-time (BJD)

2,454,971.2872

Angular separation (arcsec)

0.45000

Eq. Temperature

327K

(54 °C)

Insolation (S⊕)

2.72

Earth = 1.00

Earth Similarity (ESI)

0.542

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — liquid water is physically possible with adequate atmospheric pressure.

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-867

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,541 K — cooler than the Sun (5,778 K)

Estimated Age

5.89 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

0.910 R☉

Stellar Mass

0.920 M☉

Metallicity [Fe/H]

-0.02

Extended Stellar Properties

Surface gravity (log g)

4.490 dex

Stellar density

0.951 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,195.54 parsec

Light-years 3,899.33 ly

V-band magnitude

15.10 mag

Voyager-speed travel 68,764,600 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.811 mas

Total Proper Motion

16.752 mas/yr

PM Right Ascension

-4.84 mas/yr

PM Declination

-16.04 mas/yr

Galactic Cartesian (pc)

x = 0.186 · y = -0.598 · z = 0.780

Equatorial (J2000)

RA 287.28526° · Dec 51.24995°

Galactic ℓ, b

81.861° · 18.218°

Ecliptic λ, β

307.987° · 72.414°

HTM-20 index

943419429