Key parameters at a glance

A radius of 8.89 Earth radii
A mass of 58.60 Earth masses
Surface gravity around 0.74 g
An orbital period of 52.759 days
Semi-major axis 0.2944 AU
Equilibrium temperature 540 K (267 °C)
Distance from Earth 5,584.18 light-years
Earth Similarity Index 0.263
Travel time at Voyager 1 speed 98,477,046 years

Kepler-890 b Planet Profile

Physical Specs

Radius

8.89 R⊕

Radius (Jupiter)

0.793 R♃

Mass

58.60 M⊕

Mass (Jupiter)

0.184 M♃

Density

0.46 g/cm³

Surface Gravity

0.74 g (Earth)

Classification

Planet Type

Neptune-like

ESI Score 0.263

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

#97of 574

top 16.7%

This planet

8.89R⊕

Neptune-like median

6.39R⊕

Nearest-size peers

TOI-1232 c 8.88 R⊕ Kepler-491 b 8.92 R⊕ KOI-1783.01 8.86 R⊕

Metric	Earth	Kepler-890 b	Jupiter
Radius (R⊕)	1.00	8.89	11.21
Mass (M⊕)	1.00	58.60	317.83
Density (g/cm³)	5.51	0.46	1.33
Surface Gravity (g)	1.00	0.74	2.53
Insolation (S⊕)	1.00	30.23	0.037

Star Catalogue Identifiers

TIC

TIC 158726129

Gaia DR2

Gaia DR2 2103062523544455296

Gaia DR3

Gaia DR3 2103062523544455296

System

Kepler-890

Percentile among Neptune-like cohort

Radius 8.890 R⊕ · percentile 83 / cohort 574

Mass 58.600 M⊕ · percentile 77 / cohort 574

Orbital period 52.76 d · percentile 72 / cohort 524

Distance 1,712.12 pc · percentile 87 / cohort 572

ESI 0.263 · percentile 41 / cohort 574

Orbit & Habitability

Orbital Dynamics

Period

52.759 days

Semi-major axis

0.2944 AU

Eccentricity

0.000

Inclination

89.68 °

Year Length

A year here lasts approximately 52.76 Earth days (14.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.2944 AU.

Transit Fingerprint

Depth

0.581 %

Duration

6.607 h

Impact parameter b

0.073

Rp / R★

0.071711

Transit midpoint (BJD)

2,454,989.3068

Photometric dip

Transit produces a flux drop of 5,806 ppm lasting ≈ 6.61 h.

Extended Orbital Architecture

Planet / star radius ratio

0.071711

Semi-major axis / stellar radius

65.231

Impact parameter (b)

0.073

Transit mid-time (BJD)

2,454,989.3068

Angular separation (arcsec)

0.17200

Eq. Temperature

540K

(267 °C)

Insolation (S⊕)

30.23

Earth = 1.00

Earth Similarity (ESI)

0.263

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-890

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,954 K — hotter than the Sun (5,778 K)

Estimated Age

3.63 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.130 R☉

Stellar Mass

1.090 M☉

Metallicity [Fe/H]

0.09

Extended Stellar Properties

Surface gravity (log g)

4.370 dex

Stellar density

1.886 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,712.12 parsec

Light-years 5,584.18 ly

V-band magnitude

15.24 mag

Voyager-speed travel 98,477,046 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.555 mas

Total Proper Motion

5.988 mas/yr

PM Right Ascension

-0.85 mas/yr

PM Declination

-5.93 mas/yr

Galactic Cartesian (pc)

x = 0.228 · y = -0.685 · z = 0.692

Equatorial (J2000)

RA 288.43572° · Dec 43.76347°

Galactic ℓ, b

74.949° · 14.652°

Ecliptic λ, β

302.864° · 65.113°

HTM-20 index

233735543