Key parameters at a glance

A radius of 3.16 Earth radii
A mass of 10.10 Earth masses
Surface gravity around 1.01 g
An orbital period of 78.546 days
Semi-major axis 0.3572 AU
Equilibrium temperature 501 K (228 °C)
Distance from Earth 2,817.69 light-years
Earth Similarity Index 0.451
Travel time at Voyager 1 speed 49,689,979 years

Kepler-1786 b Planet Profile

Physical Specs

Radius

3.16 R⊕

Radius (Jupiter)

0.282 R♃

Mass

10.10 M⊕

Mass (Jupiter)

0.032 M♃

Density

1.75 g/cm³

Surface Gravity

1.01 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.451

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

#386of 1978

top 19.5%

This planet

3.16R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-569 b 3.16 R⊕ Kepler-619 b 3.16 R⊕ HD 134060 b 3.16 R⊕

Metric	Earth	Kepler-1786 b	Jupiter
Radius (R⊕)	1.00	3.16	11.21
Mass (M⊕)	1.00	10.10	317.83
Density (g/cm³)	5.51	1.75	1.33
Surface Gravity (g)	1.00	1.01	2.53
Insolation (S⊕)	1.00	10.70	0.037

Star Catalogue Identifiers

TIC

TIC 137687477

Gaia DR2

Gaia DR2 2051947739803854336

Gaia DR3

Gaia DR3 2051947739803854336

System

Kepler-1786

Percentile among Sub-Neptune cohort

Radius 3.163 R⊕ · percentile 80 / cohort 1978

Mass 10.100 M⊕ · percentile 73 / cohort 1978

Orbital period 78.55 d · percentile 91 / cohort 1946

Distance 863.91 pc · percentile 70 / cohort 1975

ESI 0.451 · percentile 62 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

78.546 days

Semi-major axis

0.3572 AU

Eccentricity

0.000

Inclination

89.96 °

Year Length

A year here lasts approximately 78.55 Earth days (21.5% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.3572 AU.

Transit Fingerprint

Depth

0.066 %

Duration

8.684 h

Impact parameter b

0.044

Rp / R★

0.023284

Transit midpoint (BJD)

2,454,977.0696

Photometric dip

Transit produces a flux drop of 659 ppm lasting ≈ 8.68 h.

Extended Orbital Architecture

Planet / star radius ratio

0.023284

Semi-major axis / stellar radius

70.760

Impact parameter (b)

0.044

Transit mid-time (BJD)

2,454,977.0696

Angular separation (arcsec)

0.41300

Eq. Temperature

501K

(228 °C)

Insolation (S⊕)

10.70

Earth = 1.00

Earth Similarity (ESI)

0.451

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-1786

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,808 K — hotter than the Sun (5,778 K)

Estimated Age

7.76 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.397 R☉

Stellar Mass

1.058 M☉

Metallicity [Fe/H]

0.14

Extended Stellar Properties

Surface gravity (log g)

4.172 dex

Stellar density

1.079 g/cm³

Metallicity ratio

[Fe/H]

Distance

863.91 parsec

Light-years 2,817.69 ly

V-band magnitude

14.09 mag

Voyager-speed travel 49,689,979 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.129 mas

Total Proper Motion

7.639 mas/yr

PM Right Ascension

-3.57 mas/yr

PM Declination

-6.75 mas/yr

Galactic Cartesian (pc)

x = 0.301 · y = -0.722 · z = 0.623

Equatorial (J2000)

RA 292.58777° · Dec 38.52198°

Galactic ℓ, b

71.487° · 9.575°

Ecliptic λ, β

305.904° · 59.177°

HTM-20 index

1162166668