Key parameters at a glance

A radius of 2.70 Earth radii
A mass of 7.77 Earth masses
Surface gravity around 1.06 g
An orbital period of 10.861 days
Semi-major axis 0.0988 AU
Equilibrium temperature 1,108 K (835 °C)
Distance from Earth 4,237.81 light-years
Earth Similarity Index 0.217
Travel time at Voyager 1 speed 74,733,778 years

Kepler-1807 b Planet Profile

Physical Specs

Radius

2.70 R⊕

Radius (Jupiter)

0.241 R♃

Mass

7.77 M⊕

Mass (Jupiter)

0.025 M♃

Density

2.16 g/cm³

Surface Gravity

1.06 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.217

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

#862of 1978

top 43.5%

This planet

2.70R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-1785 b 2.70 R⊕ Kepler-1677 b 2.70 R⊕ Kepler-27 d 2.71 R⊕

Metric	Earth	Kepler-1807 b	Jupiter
Radius (R⊕)	1.00	2.70	11.21
Mass (M⊕)	1.00	7.77	317.83
Density (g/cm³)	5.51	2.16	1.33
Surface Gravity (g)	1.00	1.06	2.53
Insolation (S⊕)	1.00	356.24	0.037

Star Catalogue Identifiers

TIC

TIC 159763602

Gaia DR2

Gaia DR2 2126190991155243264

Gaia DR3

Gaia DR3 2126190991155243264

System

Kepler-1807

Percentile among Sub-Neptune cohort

Radius 2.704 R⊕ · percentile 56 / cohort 1978

Mass 7.770 M⊕ · percentile 52 / cohort 1978

Orbital period 10.86 d · percentile 37 / cohort 1946

Distance 1,299.32 pc · percentile 89 / cohort 1975

ESI 0.217 · percentile 9 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

10.861 days

Semi-major axis

0.0988 AU

Eccentricity

0.000

Inclination

89.58 °

Year Length

A year here lasts approximately 10.86 Earth days (3.0% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0988 AU.

Transit Fingerprint

Depth

0.019 %

Duration

2.287 h

Impact parameter b

0.987

Rp / R★

0.012793

Transit midpoint (BJD)

2,454,969.6596

Photometric dip

Transit produces a flux drop of 190 ppm lasting ≈ 2.29 h.

Extended Orbital Architecture

Planet / star radius ratio

0.012793

Semi-major axis / stellar radius

37.020

Impact parameter (b)

0.987

Transit mid-time (BJD)

2,454,969.6596

Angular separation (arcsec)

0.07600

Eq. Temperature

1,108K

(835 °C)

Insolation (S⊕)

356.24

Earth = 1.00

Earth Similarity (ESI)

0.217

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-1807

Spectral Class

F-type yellow-white

Effective Temperature

6,455 K — hotter than the Sun (5,778 K)

Estimated Age

2.95 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.496 R☉

Stellar Mass

1.087 M☉

Metallicity [Fe/H]

-0.36

Extended Stellar Properties

Surface gravity (log g)

4.125 dex

Stellar density

7.178 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,299.32 parsec

Light-years 4,237.81 ly

V-band magnitude

14.13 mag

Voyager-speed travel 74,733,778 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.741 mas

Total Proper Motion

2.979 mas/yr

PM Right Ascension

1.02 mas/yr

PM Declination

-2.80 mas/yr

Galactic Cartesian (pc)

x = 0.262 · y = -0.663 · z = 0.701

Equatorial (J2000)

RA 291.54941° · Dec 44.52728°

Galactic ℓ, b

76.622° · 12.938°

Ecliptic λ, β

308.477° · 65.113°

HTM-20 index

589747038