Key parameters at a glance

A radius of 3.90 Earth radii
A mass of 14.50 Earth masses
Surface gravity around 0.95 g
An orbital period of 16.487 days
Semi-major axis 0.1337 AU
Equilibrium temperature 760 K (487 °C)
Distance from Earth 4,446.13 light-years
Earth Similarity Index 0.278
Travel time at Voyager 1 speed 78,407,427 years

Kepler-1819 b Planet Profile

Physical Specs

Radius

3.90 R⊕

Radius (Jupiter)

0.348 R♃

Mass

14.50 M⊕

Mass (Jupiter)

0.046 M♃

Density

1.34 g/cm³

Surface Gravity

0.95 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.278

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

#21of 1978

top 1.0%

This planet

3.90R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-1851 b 3.90 R⊕ Kepler-31 d 3.90 R⊕ K2-63 c 3.90 R⊕

Metric	Earth	Kepler-1819 b	Jupiter
Radius (R⊕)	1.00	3.90	11.21
Mass (M⊕)	1.00	14.50	317.83
Density (g/cm³)	5.51	1.34	1.33
Surface Gravity (g)	1.00	0.95	2.53
Insolation (S⊕)	1.00	78.99	0.037

Star Catalogue Identifiers

TIC

TIC 272596372

Gaia DR2

Gaia DR2 2080344139417876992

Gaia DR3

Gaia DR3 2080344139417876992

System

Kepler-1819

Percentile among Sub-Neptune cohort

Radius 3.904 R⊕ · percentile 99 / cohort 1978

Mass 14.500 M⊕ · percentile 92 / cohort 1978

Orbital period 16.49 d · percentile 55 / cohort 1946

Distance 1,363.19 pc · percentile 90 / cohort 1975

ESI 0.278 · percentile 23 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

16.487 days

Semi-major axis

0.1337 AU

Eccentricity

0.000

Inclination

87.38 °

Year Length

A year here lasts approximately 16.49 Earth days (4.5% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1337 AU.

Transit Fingerprint

Depth

0.099 %

Duration

1.431 h

Impact parameter b

1.648

Rp / R★

0.102000

Transit midpoint (BJD)

2,454,972.2034

Photometric dip

Transit produces a flux drop of 988 ppm lasting ≈ 1.43 h.

Extended Orbital Architecture

Planet / star radius ratio

0.102000

Semi-major axis / stellar radius

26.500

Impact parameter (b)

1.648

Transit mid-time (BJD)

2,454,972.2034

Angular separation (arcsec)

0.09810

Eq. Temperature

760K

(487 °C)

Insolation (S⊕)

78.99

Earth = 1.00

Earth Similarity (ESI)

0.278

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water.

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-1819

Spectral Class

F-type yellow-white

Effective Temperature

6,090 K — hotter than the Sun (5,778 K)

Estimated Age

0.40 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.071 R☉

Stellar Mass

1.173 M☉

Metallicity [Fe/H]

0.21

Extended Stellar Properties

Surface gravity (log g)

4.447 dex

Stellar density

1.257 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,363.19 parsec

Light-years 4,446.13 ly

V-band magnitude

15.49 mag

Voyager-speed travel 78,407,427 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.706 mas

Total Proper Motion

7.459 mas/yr

PM Right Ascension

-4.94 mas/yr

PM Declination

-5.59 mas/yr

Galactic Cartesian (pc)

x = 0.306 · y = -0.612 · z = 0.730

Equatorial (J2000)

RA 296.56003° · Dec 46.85746°

Galactic ℓ, b

80.362° · 10.869°

Ecliptic λ, β

318.451° · 65.888°

HTM-20 index

-2043775983