Key parameters at a glance

A radius of 2.58 Earth radii
A mass of 7.18 Earth masses
Surface gravity around 1.08 g
An orbital period of 24.276 days
Semi-major axis 0.1600 AU
Equilibrium temperature 580 K (307 °C)
Distance from Earth 3,455.66 light-years
Earth Similarity Index 0.428
Travel time at Voyager 1 speed 60,940,480 years

Kepler-1886 b Planet Profile

Physical Specs

Radius

2.58 R⊕

Radius (Jupiter)

0.230 R♃

Mass

7.18 M⊕

Mass (Jupiter)

0.023 M♃

Density

2.29 g/cm³

Surface Gravity

1.08 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.428

HZ Position Inner

Controversial No

Discovery

Year 2021

Method Transit

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#1056of 1978

top 53.3%

This planet

2.58R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-1018 b 2.58 R⊕ Kepler-169 f 2.58 R⊕ Kepler-461 b 2.58 R⊕

Metric	Earth	Kepler-1886 b	Jupiter
Radius (R⊕)	1.00	2.58	11.21
Mass (M⊕)	1.00	7.18	317.83
Density (g/cm³)	5.51	2.29	1.33
Surface Gravity (g)	1.00	1.08	2.53
Insolation (S⊕)	1.00	26.68	0.037

Star Catalogue Identifiers

TIC

TIC 184417747

Gaia DR2

Gaia DR2 2073294414466892288

Gaia DR3

Gaia DR3 2073294414466892288

System

Kepler-1886

Percentile among Sub-Neptune cohort

Radius 2.582 R⊕ · percentile 47 / cohort 1978

Mass 7.180 M⊕ · percentile 43 / cohort 1978

Orbital period 24.28 d · percentile 68 / cohort 1946

Distance 1,059.51 pc · percentile 82 / cohort 1975

ESI 0.428 · percentile 58 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

24.276 days

Semi-major axis

0.1600 AU

Eccentricity

0.000

Inclination

89.32 °

Year Length

A year here lasts approximately 24.28 Earth days (6.6% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1600 AU.

Transit Fingerprint

Depth

0.070 %

Duration

4.590 h

Impact parameter b

0.188

Rp / R★

0.024621

Transit midpoint (BJD)

2,454,985.4313

Photometric dip

Transit produces a flux drop of 702 ppm lasting ≈ 4.59 h.

Extended Orbital Architecture

Planet / star radius ratio

0.024621

Semi-major axis / stellar radius

39.630

Impact parameter (b)

0.188

Transit mid-time (BJD)

2,454,985.4313

Angular separation (arcsec)

0.15100

Eq. Temperature

580K

(307 °C)

Insolation (S⊕)

26.68

Earth = 1.00

Earth Similarity (ESI)

0.428

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

Valizadegan et al. 2022

Instrument

Kepler CCD Array

Publication

2022-02

Observation locale

Space

Discovery cohort

Planets confirmed in 2021 at Kepler (12 shown).

Kepler-1816 b · Super-Earth Kepler-1705 c · Sub-Neptune Kepler-1948 b · Rocky Terrestrial Kepler-196 d · Sub-Neptune Kepler-1853 b · Super-Earth Kepler-1840 b · Sub-Neptune Kepler-1881 b · Sub-Neptune Kepler-1858 b · Sub-Neptune Kepler-1874 b · Sub-Neptune Kepler-1802 c · Sub-Neptune Kepler-1749 b · Super-Earth Kepler-1849 b · Sub-Neptune

Host System: Kepler-1886

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,745 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.837 R☉

Stellar Mass

0.928 M☉

Metallicity [Fe/H]

-0.20

Extended Stellar Properties

Surface gravity (log g)

4.559 dex

Stellar density

1.677 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,059.51 parsec

Light-years 3,455.66 ly

V-band magnitude

15.63 mag

Voyager-speed travel 60,940,480 yr

Multi-band Host Photometry — 12 bands

Astrometric Data

Parallax

0.917 mas

Total Proper Motion

6.780 mas/yr

PM Right Ascension

-5.58 mas/yr

PM Declination

3.86 mas/yr

Galactic Cartesian (pc)

x = 0.342 · y = -0.693 · z = 0.635

Equatorial (J2000)

RA 296.26451° · Dec 39.40597°

Galactic ℓ, b

73.639° · 7.472°

Ecliptic λ, β

311.737° · 59.098°

HTM-20 index

-1081194268