Key parameters at a glance

A radius of 2.78 Earth radii
A mass of 8.15 Earth masses
Surface gravity around 1.05 g
An orbital period of 9.803 days
Semi-major axis 0.0916 AU
Equilibrium temperature 896 K (623 °C)
Distance from Earth 3,792.90 light-years
Earth Similarity Index 0.270
Travel time at Voyager 1 speed 66,887,801 years

Kepler-894 b Planet Profile

Physical Specs

Radius

2.78 R⊕

Radius (Jupiter)

0.248 R♃

Mass

8.15 M⊕

Mass (Jupiter)

0.026 M♃

Density

2.08 g/cm³

Surface Gravity

1.05 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.270

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

#768of 1978

top 38.8%

This planet

2.78R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-58 b 2.78 R⊕ Kepler-531 b 2.78 R⊕ K2-284 b 2.78 R⊕

Metric	Earth	Kepler-894 b	Jupiter
Radius (R⊕)	1.00	2.78	11.21
Mass (M⊕)	1.00	8.15	317.83
Density (g/cm³)	5.51	2.08	1.33
Surface Gravity (g)	1.00	1.05	2.53
Insolation (S⊕)	1.00	119.88	0.037

Star Catalogue Identifiers

TIC

TIC 158838278

Gaia DR2

Gaia DR2 2130777191591084032

Gaia DR3

Gaia DR3 2130777191591084032

System

Kepler-894

Percentile among Sub-Neptune cohort

Radius 2.780 R⊕ · percentile 61 / cohort 1978

Mass 8.150 M⊕ · percentile 56 / cohort 1978

Orbital period 9.80 d · percentile 33 / cohort 1946

Distance 1,162.91 pc · percentile 85 / cohort 1975

ESI 0.270 · percentile 21 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

9.803 days

Semi-major axis

0.0916 AU

Eccentricity

0.000

Inclination

87.12 °

Year Length

A year here lasts approximately 9.80 Earth days (2.7% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0916 AU.

Transit Fingerprint

Depth

0.081 %

Duration

4.493 h

Impact parameter b

0.743

Rp / R★

0.029796

Transit midpoint (BJD)

2,455,196.9859

Photometric dip

Transit produces a flux drop of 813 ppm lasting ≈ 4.49 h.

Extended Orbital Architecture

Planet / star radius ratio

0.029796

Semi-major axis / stellar radius

13.210

Impact parameter (b)

0.743

Transit mid-time (BJD)

2,455,196.9859

Angular separation (arcsec)

0.07880

Eq. Temperature

896K

(623 °C)

Insolation (S⊕)

119.88

Earth = 1.00

Earth Similarity (ESI)

0.270

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-894

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,603 K — cooler than the Sun (5,778 K)

Estimated Age

4.27 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.850 R☉

Stellar Mass

0.870 M☉

Metallicity [Fe/H]

-0.25

Extended Stellar Properties

Surface gravity (log g)

4.530 dex

Stellar density

0.453 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,162.91 parsec

Light-years 3,792.90 ly

V-band magnitude

15.69 mag

Voyager-speed travel 66,887,801 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.831 mas

Total Proper Motion

6.945 mas/yr

PM Right Ascension

-4.69 mas/yr

PM Declination

-5.12 mas/yr

Galactic Cartesian (pc)

x = 0.219 · y = -0.647 · z = 0.731

Equatorial (J2000)

RA 288.73405° · Dec 46.93936°

Galactic ℓ, b

78.055° · 15.722°

Ecliptic λ, β

305.925° · 68.055°

HTM-20 index

1854269564