Key parameters at a glance

A radius of 12.21 Earth radii
An orbital period of 4.959 days
Semi-major axis 0.0565 AU
Equilibrium temperature 1,103 K (830 °C)
Distance from Earth 4,287.35 light-years
Earth Similarity Index 0.050
Travel time at Voyager 1 speed 75,607,470 years

Kepler-1976 b Planet Profile

Physical Specs

Radius

12.21 R⊕

Radius (Jupiter)

1.089 R♃

Mass

— M⊕

Mass (Jupiter)

— M♃

Density

— g/cm³

Surface Gravity

— g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.050

HZ Position Inner

Controversial No

Discovery

Year 2023

Method Transit Timing Variations

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#1409of 1771

top 79.5%

This planet

12.21R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

TOI-1278 b 12.22 R⊕ HAT-P-31 b 12.22 R⊕ WASP-138 b 12.22 R⊕

Metric	Earth	Kepler-1976 b	Jupiter
Radius (R⊕)	1.00	12.21	11.21
Mass (M⊕)	1.00	—	317.83
Density (g/cm³)	5.51	—	1.33
Surface Gravity (g)	1.00	—	2.53
Insolation (S⊕)	1.00	349.40	0.037

Star Catalogue Identifiers

TIC

TIC 26584326

Gaia DR2

Gaia DR2 2129671220332872192

Gaia DR3

Gaia DR3 2129671220332872192

System

Kepler-1976

Percentile among Gas Giant cohort

Radius 12.210 R⊕ · percentile 20 / cohort 1771

Orbital period 4.96 d · percentile 36 / cohort 1533

Distance 1,314.51 pc · percentile 89 / cohort 1759

ESI 0.050 · percentile 4 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

4.959 days

Semi-major axis

0.0565 AU

Eccentricity

0.000

Inclination

86.15 °

Year Length

A year here lasts approximately 4.96 Earth days (1.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0565 AU.

Transit Fingerprint

Depth

0.980 %

Duration

2.227 h

Impact parameter b

0.831

Rp / R★

0.103379

Transit midpoint (BJD)

2,455,005.2585

Photometric dip

Transit produces a flux drop of 9,802 ppm lasting ≈ 2.23 h.

Extended Orbital Architecture

Planet / star radius ratio

0.103379

Semi-major axis / stellar radius

12.386

Impact parameter (b)

0.831

Transit mid-time (BJD)

2,455,005.2585

Angular separation (arcsec)

0.04300

Eq. Temperature

1,103K

(830 °C)

Insolation (S⊕)

349.40

Earth = 1.00

Earth Similarity (ESI)

0.050

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.

Detection Signatures

Transit photometry

A transit dip has been observed from at least one telescope.

Transit timing variations

Gravitational interactions from neighbours have been detected.

Discovery Paper

Primary reference

Wu et al. 2023

Instrument

Kepler CCD Array

Publication

2023-02

Observation locale

Space

Discovery cohort

Planets confirmed in 2023 at Kepler (12 shown).

Kepler-1126 c · Super-Earth Kepler-2000 c · Super-Earth Kepler-1052 c · Sub-Neptune Kepler-311 d · Sub-Neptune Kepler-1996 c · Sub-Neptune Kepler-1162 c · Super-Earth Kepler-1996 b · Sub-Neptune Kepler-1610 c · Sub-Neptune Kepler-1801 c · Sub-Neptune Kepler-1995 b · Neptune-like Kepler-1992 b · Rocky Terrestrial Kepler-1986 b · Super-Earth

Host System: Kepler-1976

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,712 K — cooler than the Sun (5,778 K)

Estimated Age

0.30 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.082 R☉

Stellar Mass

0.976 M☉

Metallicity [Fe/H]

0.10

Extended Stellar Properties

Surface gravity (log g)

4.359 dex

Stellar density

1.462 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,314.51 parsec

Light-years 4,287.35 ly

V-band magnitude

15.45 mag

Voyager-speed travel 75,607,470 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.732 mas

Total Proper Motion

12.809 mas/yr

PM Right Ascension

0.62 mas/yr

PM Declination

-12.79 mas/yr

Galactic Cartesian (pc)

x = 0.249 · y = -0.611 · z = 0.752

Equatorial (J2000)

RA 292.16706° · Dec 48.72753°

Galactic ℓ, b

80.718° · 14.345°

Ecliptic λ, β

313.579° · 68.837°

HTM-20 index

-696985032