Key parameters at a glance

A radius of 1.58 Earth radii
A mass of 3.11 Earth masses
Surface gravity around 1.25 g
An orbital period of 2.524 days
Semi-major axis 0.0344 AU
Equilibrium temperature 1,203 K (930 °C)
Distance from Earth 3,007.99 light-years
Earth Similarity Index 0.240
Travel time at Voyager 1 speed 53,045,901 years

Kepler-1865 b Planet Profile

Physical Specs

Radius

1.58 R⊕

Radius (Jupiter)

0.141 R♃

Mass

3.11 M⊕

Mass (Jupiter)

0.010 M♃

Density

4.36 g/cm³

Surface Gravity

1.25 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.240

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

#617of 1176

top 52.4%

This planet

1.58R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-1001 c 1.58 R⊕ K2-191 b 1.58 R⊕ K2-396 b 1.58 R⊕

Metric	Earth	Kepler-1865 b	Jupiter
Radius (R⊕)	1.00	1.58	11.21
Mass (M⊕)	1.00	3.11	317.83
Density (g/cm³)	5.51	4.36	1.33
Surface Gravity (g)	1.00	1.25	2.53
Insolation (S⊕)	1.00	495.14	0.037

Star Catalogue Identifiers

TIC

TIC 138431036

Gaia DR2

Gaia DR2 2077420641081096576

Gaia DR3

Gaia DR3 2077420641081096576

System

Kepler-1865

Percentile among Super-Earth cohort

Radius 1.577 R⊕ · percentile 48 / cohort 1176

Mass 3.110 M⊕ · percentile 43 / cohort 1176

Orbital period 2.52 d · percentile 17 / cohort 1164

Distance 922.26 pc · percentile 76 / cohort 1171

ESI 0.240 · percentile 21 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

2.524 days

Semi-major axis

0.0344 AU

Eccentricity

0.000

Inclination

89.73 °

Year Length

A year here lasts approximately 2.52 Earth days (0.7% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0344 AU.

Transit Fingerprint

Depth

0.030 %

Duration

1.197 h

Impact parameter b

0.229

Rp / R★

0.015760

Transit midpoint (BJD)

2,454,966.8595

Photometric dip

Transit produces a flux drop of 303 ppm lasting ≈ 1.20 h.

Extended Orbital Architecture

Planet / star radius ratio

0.015760

Semi-major axis / stellar radius

16.730

Impact parameter (b)

0.229

Transit mid-time (BJD)

2,454,966.8595

Angular separation (arcsec)

0.03730

Eq. Temperature

1,203K

(930 °C)

Insolation (S⊕)

495.14

Earth = 1.00

Earth Similarity (ESI)

0.240

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-1865

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,420 K — cooler than the Sun (5,778 K)

Estimated Age

11.60 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

0.871 R☉

Stellar Mass

0.849 M☉

Metallicity [Fe/H]

-0.06

Extended Stellar Properties

Surface gravity (log g)

4.487 dex

Stellar density

12.927 g/cm³

Metallicity ratio

[Fe/H]

Distance

922.26 parsec

Light-years 3,007.99 ly

V-band magnitude

15.47 mag

Voyager-speed travel 53,045,901 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.057 mas

Total Proper Motion

16.390 mas/yr

PM Right Ascension

11.15 mas/yr

PM Declination

-12.02 mas/yr

Galactic Cartesian (pc)

x = 0.304 · y = -0.684 · z = 0.664

Equatorial (J2000)

RA 293.94124° · Dec 41.59041°

Galactic ℓ, b

74.736° · 10.064°

Ecliptic λ, β

309.886° · 61.755°

HTM-20 index

1447939478