Key parameters at a glance

A radius of 3.38 Earth radii
A mass of 11.30 Earth masses
Surface gravity around 0.99 g
An orbital period of 29.922 days
Semi-major axis 0.1954 AU
Equilibrium temperature 782 K (509 °C)
Earth Similarity Index 0.287

Kepler-1676 b Planet Profile

Physical Specs

Radius

3.38 R⊕

Radius (Jupiter)

0.301 R♃

Mass

11.30 M⊕

Mass (Jupiter)

0.036 M♃

Density

1.61 g/cm³

Surface Gravity

0.99 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.287

HZ Position Inner

Controversial No

Discovery

Year 2020

Method Transit

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#236of 1978

top 11.9%

This planet

3.38R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-268 c 3.38 R⊕ Kepler-965 b 3.38 R⊕ Kepler-139 c 3.38 R⊕

Metric	Earth	Kepler-1676 b	Jupiter
Radius (R⊕)	1.00	3.38	11.21
Mass (M⊕)	1.00	11.30	317.83
Density (g/cm³)	5.51	1.61	1.33
Surface Gravity (g)	1.00	0.99	2.53
Insolation (S⊕)	1.00	33.45	0.037

Star Catalogue Identifiers

TIC

TIC 158422963

System

Kepler-1676

Percentile among Sub-Neptune cohort

Radius 3.377 R⊕ · percentile 88 / cohort 1978

Mass 11.300 M⊕ · percentile 82 / cohort 1978

Orbital period 29.92 d · percentile 73 / cohort 1946

ESI 0.287 · percentile 25 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

29.922 days

Semi-major axis

0.1954 AU

Eccentricity

0.000

Inclination

89.72 °

Year Length

A year here lasts approximately 29.92 Earth days (8.2% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1954 AU.

Transit Fingerprint

Depth

0.035 %

Duration

2.758 h

Impact parameter b

0.010

Rp / R★

0.017319

Transit midpoint (BJD)

2,454,979.0089

Photometric dip

Transit produces a flux drop of 345 ppm lasting ≈ 2.76 h.

Extended Orbital Architecture

Planet / star radius ratio

0.017319

Semi-major axis / stellar radius

84.310

Impact parameter (b)

0.010

Transit mid-time (BJD)

2,454,979.0089

Eq. Temperature

782K

(509 °C)

Insolation (S⊕)

33.45

Earth = 1.00

Earth Similarity (ESI)

0.287

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

Armstrong et al. 2021

Instrument

Kepler CCD Array

Publication

2021-07

Observation locale

Space

Discovery cohort

Planets confirmed in 2020 at Kepler (12 shown).

Kepler-1649 c · Rocky Terrestrial Kepler-1701 b · Sub-Neptune Kepler-1690 b · Sub-Neptune Kepler-1700 b · Sub-Neptune Kepler-1684 b · Sub-Neptune Kepler-1678 b · Sub-Neptune Kepler-598 c · Sub-Neptune Kepler-1661 b · Sub-Neptune Kepler-1663 b · Sub-Neptune Kepler-1681 b · Sub-Neptune Kepler-1672 b · Sub-Neptune Kepler-1702 b · Super-Earth

Host System: Kepler-1676

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,878 K — hotter than the Sun (5,778 K)

Estimated Age

0.30 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.061 R☉

Stellar Mass

1.070 M☉

Metallicity [Fe/H]

0.14

Extended Stellar Properties

Surface gravity (log g)

4.471 dex

Stellar density

12.664 g/cm³

Metallicity ratio

[M/H]

Multi-band Host Photometry — 15 bands

Astrometric Data

Total Proper Motion

9.786 mas/yr

PM Right Ascension

9.27 mas/yr

PM Declination

-3.14 mas/yr

Galactic Cartesian (pc)

x = 0.215 · y = -0.692 · z = 0.689

Equatorial (J2000)

RA 287.23688° · Dec 43.56717°

Galactic ℓ, b

74.406° · 15.370°

Ecliptic λ, β

300.754° · 65.176°

HTM-20 index

-2143489839