Key parameters at a glance

A radius of 1.18 Earth radii
A mass of 1.74 Earth masses
Surface gravity around 1.26 g
An orbital period of 3.822 days
Semi-major axis 0.0385 AU
Equilibrium temperature 601 K (328 °C)
Distance from Earth 1,123.08 light-years
Earth Similarity Index 0.525
Travel time at Voyager 1 speed 19,805,440 years
Almost certainly tidally locked to its host star given the close orbit

Kepler-1902 b Planet Profile

Physical Specs

Radius

1.18 R⊕

Radius (Jupiter)

0.105 R♃

Mass

1.74 M⊕

Mass (Jupiter)

0.005 M♃

Density

5.88 g/cm³

Surface Gravity

1.26 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.525

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

#133of 570

top 23.2%

This planet

1.18R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

Kepler-1514 c 1.18 R⊕ TOI-1453 b 1.17 R⊕ Kepler-1933 b 1.18 R⊕

Metric	Earth	Kepler-1902 b	Jupiter
Radius (R⊕)	1.00	1.18	11.21
Mass (M⊕)	1.00	1.74	317.83
Density (g/cm³)	5.51	5.88	1.33
Surface Gravity (g)	1.00	1.26	2.53
Insolation (S⊕)	1.00	30.84	0.037

Star Catalogue Identifiers

TIC

TIC 63370825

Gaia DR2

Gaia DR2 2077668752749671424

Gaia DR3

Gaia DR3 2077668752749671424

System

Kepler-1902

Percentile among Rocky Terrestrial cohort

Radius 1.176 R⊕ · percentile 77 / cohort 570

Mass 1.740 M⊕ · percentile 70 / cohort 570

Orbital period 3.82 d · percentile 41 / cohort 567

Distance 344.34 pc · percentile 47 / cohort 566

ESI 0.525 · percentile 72 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

3.822 days

Semi-major axis

0.0385 AU

Eccentricity

0.000

Inclination

86.19 °

Year Length

A year here lasts approximately 3.82 Earth days (1.0% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0385 AU.

Transit Fingerprint

Depth

0.036 %

Duration

1.859 h

Impact parameter b

0.051

Rp / R★

0.017564

Transit midpoint (BJD)

2,454,965.1523

Photometric dip

Transit produces a flux drop of 363 ppm lasting ≈ 1.86 h.

Extended Orbital Architecture

Planet / star radius ratio

0.017564

Semi-major axis / stellar radius

15.970

Impact parameter (b)

0.051

Transit mid-time (BJD)

2,454,965.1523

Angular separation (arcsec)

0.11200

Eq. Temperature

601K

(328 °C)

Insolation (S⊕)

30.84

Earth = 1.00

Earth Similarity (ESI)

0.525

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water. Close-orbiting tidally-locked around a cool host.

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-1902

Spectral Class

K-type orange

Effective Temperature

3,729 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.514 R☉

Stellar Mass

0.520 M☉

Metallicity [Fe/H]

0.06

Extended Stellar Properties

Surface gravity (log g)

4.733 dex

Stellar density

1.677 g/cm³

Metallicity ratio

[Fe/H]

Distance

344.34 parsec

Light-years 1,123.08 ly

V-band magnitude

16.11 mag

Voyager-speed travel 19,805,440 yr

Multi-band Host Photometry — 12 bands

Astrometric Data

Parallax

2.877 mas

Total Proper Motion

3.256 mas/yr

PM Right Ascension

-0.83 mas/yr

PM Declination

-3.15 mas/yr

Galactic Cartesian (pc)

x = 0.287 · y = -0.685 · z = 0.669

Equatorial (J2000)

RA 292.73765° · Dec 42.01478°

Galactic ℓ, b

74.704° · 11.056°

Ecliptic λ, β

308.386° · 62.457°

HTM-20 index

-160740756