Key parameters at a glance

A radius of 8.94 Earth radii
A mass of 59.10 Earth masses
Surface gravity around 0.74 g
An orbital period of 321.212 days
Semi-major axis 0.9408 AU
Equilibrium temperature 310 K (37 °C)
Distance from Earth 3,194.83 light-years
Earth Similarity Index 0.413
Travel time at Voyager 1 speed 56,340,855 years

Kepler-1746 b Planet Profile

Physical Specs

Radius

8.94 R⊕

Radius (Jupiter)

0.797 R♃

Mass

59.10 M⊕

Mass (Jupiter)

0.186 M♃

Density

0.46 g/cm³

Surface Gravity

0.74 g (Earth)

Classification

Planet Type

Neptune-like

ESI Score 0.413

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

#95of 574

top 16.4%

This planet

8.94R⊕

Neptune-like median

6.39R⊕

Nearest-size peers

Kepler-491 b 8.92 R⊕ HATS-48 A b 8.97 R⊕ WASP-139 b 8.97 R⊕

Metric	Earth	Kepler-1746 b	Jupiter
Radius (R⊕)	1.00	8.94	11.21
Mass (M⊕)	1.00	59.10	317.83
Density (g/cm³)	5.51	0.46	1.33
Surface Gravity (g)	1.00	0.74	2.53
Insolation (S⊕)	1.00	3.40	0.037

Star Catalogue Identifiers

TIC

TIC 158722379

Gaia DR2

Gaia DR2 2102490189082470528

Gaia DR3

Gaia DR3 2102490189082470528

System

Kepler-1746

Percentile among Neptune-like cohort

Radius 8.935 R⊕ · percentile 83 / cohort 574

Mass 59.100 M⊕ · percentile 77 / cohort 574

Orbital period 321.21 d · percentile 94 / cohort 524

Distance 979.54 pc · percentile 73 / cohort 572

ESI 0.413 · percentile 75 / cohort 574

Orbit & Habitability

Orbital Dynamics

Period

321.212 days

Semi-major axis

0.9408 AU

Eccentricity

0.000

Inclination

89.86 °

Year Length

A year here lasts approximately 321.21 Earth days (87.9% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.9408 AU.

Transit Fingerprint

Depth

0.241 %

Duration

3.961 h

Impact parameter b

0.858

Rp / R★

0.051430

Transit midpoint (BJD)

2,455,039.9301

Photometric dip

Transit produces a flux drop of 2,407 ppm lasting ≈ 3.96 h.

Extended Orbital Architecture

Planet / star radius ratio

0.051430

Semi-major axis / stellar radius

377.000

Impact parameter (b)

0.858

Transit mid-time (BJD)

2,455,039.9301

Angular separation (arcsec)

0.96000

Eq. Temperature

310K

(37 °C)

Insolation (S⊕)

3.40

Earth = 1.00

Earth Similarity (ESI)

0.413

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — liquid water is physically possible with adequate atmospheric pressure.

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-1746

Spectral Class

F-type yellow-white

Effective Temperature

6,018 K — hotter than the Sun (5,778 K)

Estimated Age

5.75 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.286 R☉

Stellar Mass

1.090 M☉

Metallicity [Fe/H]

0.06

Extended Stellar Properties

Surface gravity (log g)

4.257 dex

Stellar density

8.490 g/cm³

Metallicity ratio

[Fe/H]

Distance

979.54 parsec

Light-years 3,194.83 ly

V-band magnitude

13.57 mag

Voyager-speed travel 56,340,855 yr

Multi-band Host Photometry — 15 bands

Astrometric Data

Parallax

0.992 mas

Total Proper Motion

11.823 mas/yr

PM Right Ascension

-8.54 mas/yr

PM Declination

-8.18 mas/yr

Galactic Cartesian (pc)

x = 0.233 · y = -0.703 · z = 0.673

Equatorial (J2000)

RA 288.32040° · Dec 42.26139°

Galactic ℓ, b

73.496° · 14.121°

Ecliptic λ, β

301.667° · 63.700°

HTM-20 index

-1955200256