Key parameters at a glance

A radius of 2.23 Earth radii
A mass of 5.62 Earth masses
Surface gravity around 1.13 g
An orbital period of 15.136 days
Semi-major axis 0.1286 AU
Equilibrium temperature 933 K (660 °C)
Distance from Earth 2,063.80 light-years
Earth Similarity Index 0.281
Travel time at Voyager 1 speed 36,395,186 years

Kepler-1768 b Planet Profile

Physical Specs

Radius

2.23 R⊕

Radius (Jupiter)

0.199 R♃

Mass

5.62 M⊕

Mass (Jupiter)

0.018 M♃

Density

2.77 g/cm³

Surface Gravity

1.13 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.281

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

#1620of 1978

top 81.9%

This planet

2.23R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

K2-264 b 2.23 R⊕ Kepler-292 d 2.23 R⊕ Kepler-165 c 2.23 R⊕

Metric	Earth	Kepler-1768 b	Jupiter
Radius (R⊕)	1.00	2.23	11.21
Mass (M⊕)	1.00	5.62	317.83
Density (g/cm³)	5.51	2.77	1.33
Surface Gravity (g)	1.00	1.13	2.53
Insolation (S⊕)	1.00	179.16	0.037

Star Catalogue Identifiers

TIC

TIC 239236731

Gaia DR2

Gaia DR2 2076155515517119744

Gaia DR3

Gaia DR3 2076155515517119744

System

Kepler-1768

Percentile among Sub-Neptune cohort

Radius 2.233 R⊕ · percentile 18 / cohort 1978

Mass 5.620 M⊕ · percentile 18 / cohort 1978

Orbital period 15.14 d · percentile 51 / cohort 1946

Distance 632.77 pc · percentile 55 / cohort 1975

ESI 0.281 · percentile 23 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

15.136 days

Semi-major axis

0.1286 AU

Eccentricity

0.000

Inclination

89.44 °

Year Length

A year here lasts approximately 15.14 Earth days (4.1% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1286 AU.

Transit Fingerprint

Depth

0.027 %

Duration

2.185 h

Impact parameter b

0.983

Rp / R★

0.014897

Transit midpoint (BJD)

2,454,979.5827

Photometric dip

Transit produces a flux drop of 266 ppm lasting ≈ 2.18 h.

Extended Orbital Architecture

Planet / star radius ratio

0.014897

Semi-major axis / stellar radius

53.650

Impact parameter (b)

0.983

Transit mid-time (BJD)

2,454,979.5827

Angular separation (arcsec)

0.20300

Eq. Temperature

933K

(660 °C)

Insolation (S⊕)

179.16

Earth = 1.00

Earth Similarity (ESI)

0.281

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-1768

Spectral Class

F-type yellow-white

Effective Temperature

6,050 K — hotter than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

1.572 R☉

Stellar Mass

1.240 M☉

Metallicity [Fe/H]

0.14

Extended Stellar Properties

Surface gravity (log g)

4.137 dex

Stellar density

8.469 g/cm³

Metallicity ratio

[Fe/H]

Distance

632.77 parsec

Light-years 2,063.80 ly

V-band magnitude

13.57 mag

Voyager-speed travel 36,395,186 yr

Multi-band Host Photometry — 15 bands

Astrometric Data

Parallax

1.552 mas

Total Proper Motion

0.749 mas/yr

PM Right Ascension

0.64 mas/yr

PM Declination

-0.39 mas/yr

Galactic Cartesian (pc)

x = 0.354 · y = -0.615 · z = 0.704

Equatorial (J2000)

RA 299.95723° · Dec 44.77189°

Galactic ℓ, b

79.708° · 7.781°

Ecliptic λ, β

321.280° · 62.978°

HTM-20 index

-1145421765