Key parameters at a glance

A radius of 2.55 Earth radii
A mass of 7.05 Earth masses
Surface gravity around 1.08 g
An orbital period of 5.254 days
Semi-major axis 0.0602 AU
Equilibrium temperature 1,093 K (820 °C)
Distance from Earth 4,803.04 light-years
Earth Similarity Index 0.225
Travel time at Voyager 1 speed 84,701,579 years

Kepler-1836 b Planet Profile

Physical Specs

Radius

2.55 R⊕

Radius (Jupiter)

0.228 R♃

Mass

7.05 M⊕

Mass (Jupiter)

0.022 M♃

Density

2.33 g/cm³

Surface Gravity

1.08 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.225

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

#1102of 1978

top 55.7%

This planet

2.55R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-1681 b 2.55 R⊕ K2-80 d 2.55 R⊕ TOI-5726.01 2.55 R⊕

Metric	Earth	Kepler-1836 b	Jupiter
Radius (R⊕)	1.00	2.55	11.21
Mass (M⊕)	1.00	7.05	317.83
Density (g/cm³)	5.51	2.33	1.33
Surface Gravity (g)	1.00	1.08	2.53
Insolation (S⊕)	1.00	338.15	0.037

Star Catalogue Identifiers

TIC

TIC 137556026

Gaia DR2

Gaia DR2 2053579930453436800

Gaia DR3

Gaia DR3 2053579930453436800

System

Kepler-1836

Percentile among Sub-Neptune cohort

Radius 2.553 R⊕ · percentile 44 / cohort 1978

Mass 7.050 M⊕ · percentile 41 / cohort 1978

Orbital period 5.25 d · percentile 13 / cohort 1946

Distance 1,472.62 pc · percentile 92 / cohort 1975

ESI 0.225 · percentile 11 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

5.254 days

Semi-major axis

0.0602 AU

Eccentricity

0.000

Inclination

89.97 °

Year Length

A year here lasts approximately 5.25 Earth days (1.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0602 AU.

Transit Fingerprint

Depth

0.046 %

Duration

2.988 h

Impact parameter b

0.007

Rp / R★

0.019706

Transit midpoint (BJD)

2,454,966.7295

Photometric dip

Transit produces a flux drop of 462 ppm lasting ≈ 2.99 h.

Extended Orbital Architecture

Planet / star radius ratio

0.019706

Semi-major axis / stellar radius

13.711

Impact parameter (b)

0.007

Transit mid-time (BJD)

2,454,966.7295

Angular separation (arcsec)

0.04090

Eq. Temperature

1,093K

(820 °C)

Insolation (S⊕)

338.15

Earth = 1.00

Earth Similarity (ESI)

0.225

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.

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-1836

Spectral Class

F-type yellow-white

Effective Temperature

6,123 K — hotter than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.987 R☉

Stellar Mass

1.053 M☉

Metallicity [Fe/H]

-0.14

Extended Stellar Properties

Surface gravity (log g)

4.472 dex

Stellar density

1.766 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,472.62 parsec

Light-years 4,803.04 ly

V-band magnitude

15.56 mag

Voyager-speed travel 84,701,579 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.651 mas

Total Proper Motion

10.887 mas/yr

PM Right Ascension

-5.51 mas/yr

PM Declination

-9.39 mas/yr

Galactic Cartesian (pc)

x = 0.287 · y = -0.700 · z = 0.654

Equatorial (J2000)

RA 292.31509° · Dec 40.83878°

Galactic ℓ, b

73.489° · 10.811°

Ecliptic λ, β

306.938° · 61.447°

HTM-20 index

1837611787