Key parameters at a glance

A radius of 1.58 Earth radii
A mass of 3.13 Earth masses
Surface gravity around 1.25 g
An orbital period of 2.730 days
Semi-major axis 0.0394 AU
Equilibrium temperature 1,455 K (1182 °C)
Distance from Earth 4,341.95 light-years
Earth Similarity Index 0.193
Travel time at Voyager 1 speed 76,570,315 years

1 sibling around Kepler-1859

Kepler-1859 b shares its host star with 1 other confirmed planet. Side-by-side measurements below.

Planet	Type	Radius (R⊕)	Mass (M⊕)	Period (d)	Eq. T (K)	Year
Kepler-1859 b this	Super-Earth	1.58	3.13	2.730	1,455	2021
Kepler-1859 c	Super-Earth	1.66	3.39	3.596	1,327	2023

Kepler-1859 b Planet Profile

Physical Specs

Radius

1.58 R⊕

Radius (Jupiter)

0.141 R♃

Mass

3.13 M⊕

Mass (Jupiter)

0.010 M♃

Density

4.33 g/cm³

Surface Gravity

1.25 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.193

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

#601of 1176

top 51.0%

This planet

1.58R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

K2-3 c 1.58 R⊕ Kepler-445 b 1.58 R⊕ Kepler-386 c 1.58 R⊕

Metric	Earth	Kepler-1859 b	Jupiter
Radius (R⊕)	1.00	1.58	11.21
Mass (M⊕)	1.00	3.13	317.83
Density (g/cm³)	5.51	4.33	1.33
Surface Gravity (g)	1.00	1.25	2.53
Insolation (S⊕)	1.00	1,056.15	0.037

Star Catalogue Identifiers

TIC

TIC 270790094

Gaia DR2

Gaia DR2 2128198974266072192

Gaia DR3

Gaia DR3 2128198974266072192

System

Kepler-1859

Percentile among Super-Earth cohort

Radius 1.583 R⊕ · percentile 49 / cohort 1176

Mass 3.130 M⊕ · percentile 45 / cohort 1176

Orbital period 2.73 d · percentile 18 / cohort 1164

Distance 1,331.25 pc · percentile 92 / cohort 1171

ESI 0.193 · percentile 11 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

2.730 days

Semi-major axis

0.0394 AU

Eccentricity

0.000

Inclination

85.66 °

Year Length

A year here lasts approximately 2.73 Earth days (0.7% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0394 AU.

Transit Fingerprint

Depth

0.015 %

Duration

2.721 h

Impact parameter b

0.452

Rp / R★

0.011314

Transit midpoint (BJD)

2,454,966.2866

Photometric dip

Transit produces a flux drop of 146 ppm lasting ≈ 2.72 h.

Extended Orbital Architecture

Planet / star radius ratio

0.011314

Semi-major axis / stellar radius

6.730

Impact parameter (b)

0.452

Transit mid-time (BJD)

2,454,966.2866

Angular separation (arcsec)

0.02960

Eq. Temperature

1,455K

(1182 °C)

Insolation (S⊕)

1,056.15

Earth = 1.00

Earth Similarity (ESI)

0.193

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-1859

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,887 K — hotter than the Sun (5,778 K)

Estimated Age

2.50 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.235 R☉

Stellar Mass

1.090 M☉

Metallicity [Fe/H]

0.16

Extended Stellar Properties

Surface gravity (log g)

4.292 dex

Stellar density

0.775 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,331.25 parsec

Light-years 4,341.95 ly

V-band magnitude

15.18 mag

Voyager-speed travel 76,570,315 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.723 mas

Total Proper Motion

12.193 mas/yr

PM Right Ascension

-4.38 mas/yr

PM Declination

-11.38 mas/yr

Galactic Cartesian (pc)

x = 0.279 · y = -0.626 · z = 0.728

Equatorial (J2000)

RA 293.98868° · Dec 46.71800°

Galactic ℓ, b

79.406° · 12.367°

Ecliptic λ, β

314.348° · 66.502°

HTM-20 index

-1311771796