Key parameters at a glance

A radius of 1.00 Earth radii
A mass of 0.96 Earth masses
Surface gravity around 0.97 g
An orbital period of 4.562 days
Semi-major axis 0.0510 AU
Equilibrium temperature 1,533 K (1260 °C)
Distance from Earth 1,143.03 light-years
Earth Similarity Index 0.199
Travel time at Voyager 1 speed 20,157,333 years

Kepler-1800 b Planet Profile

Physical Specs

Radius

1.00 R⊕

Radius (Jupiter)

0.089 R♃

Mass

0.96 M⊕

Mass (Jupiter)

0.003 M♃

Density

5.33 g/cm³

Surface Gravity

0.97 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.199

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

#343of 570

top 60.0%

This planet

1.00R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

TOI-2322 b 0.99 R⊕ Kepler-392 b 1.00 R⊕ Kepler-1417 b 1.00 R⊕

Metric	Earth	Kepler-1800 b	Jupiter
Radius (R⊕)	1.00	1.00	11.21
Mass (M⊕)	1.00	0.96	317.83
Density (g/cm³)	5.51	5.33	1.33
Surface Gravity (g)	1.00	0.97	2.53
Insolation (S⊕)	1.00	242.00	0.037

Star Catalogue Identifiers

TIC

TIC 169814632

Gaia DR2

Gaia DR2 2073686523494136192

Gaia DR3

Gaia DR3 2073686523494136192

System

Kepler-1800

Percentile among Rocky Terrestrial cohort

Radius 0.997 R⊕ · percentile 40 / cohort 570

Mass 0.961 M⊕ · percentile 35 / cohort 570

Orbital period 4.56 d · percentile 50 / cohort 567

Distance 350.46 pc · percentile 47 / cohort 566

ESI 0.199 · percentile 14 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

4.562 days

Semi-major axis

0.0510 AU

Eccentricity

0.000

Inclination

79.48 °

Year Length

A year here lasts approximately 4.56 Earth days (1.2% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0510 AU.

Transit Fingerprint

Depth

0.008 %

Duration

2.852 h

Impact parameter b

0.750

Rp / R★

0.008367

Transit midpoint (BJD)

2,454,965.6430

Photometric dip

Transit produces a flux drop of 82 ppm lasting ≈ 2.85 h.

Extended Orbital Architecture

Planet / star radius ratio

0.008367

Semi-major axis / stellar radius

12.310

Impact parameter (b)

0.750

Transit mid-time (BJD)

2,454,965.6430

Angular separation (arcsec)

0.14500

Eq. Temperature

1,533K

(1260 °C)

Insolation (S⊕)

242.00

Earth = 1.00

Earth Similarity (ESI)

0.199

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-1800

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,343 K — cooler than the Sun (5,778 K)

Estimated Age

11.75 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

2.506 R☉

Stellar Mass

1.330 M☉

Metallicity [Fe/H]

0.08

Extended Stellar Properties

Surface gravity (log g)

3.764 dex

Stellar density

0.118 g/cm³

Metallicity ratio

[Fe/H]

Distance

350.46 parsec

Light-years 1,143.03 ly

V-band magnitude

13.19 mag

Voyager-speed travel 20,157,333 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

2.825 mas

Total Proper Motion

33.673 mas/yr

PM Right Ascension

-11.07 mas/yr

PM Declination

-31.80 mas/yr

Galactic Cartesian (pc)

x = 0.354 · y = -0.675 · z = 0.647

Equatorial (J2000)

RA 297.65133° · Dec 40.35242°

Galactic ℓ, b

74.998° · 7.012°

Ecliptic λ, β

314.347° · 59.607°

HTM-20 index

-654836286