Key parameters at a glance

A radius of 11.10 Earth radii
A mass of 613.41 Earth masses
Surface gravity around 4.98 g
An orbital period of 141.242 days
Semi-major axis 0.5340 AU
Equilibrium temperature 347 K (74 °C)
Distance from Earth 3,007.11 light-years
Earth Similarity Index 0.461
Travel time at Voyager 1 speed 53,030,429 years

KOI-3680 b Planet Profile

Physical Specs

Radius

11.10 R⊕

Radius (Jupiter)

0.990 R♃

Mass

613.41 M⊕

Mass (Jupiter)

1.930 M♃

Density

2.46 g/cm³

Surface Gravity

4.98 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.461

HZ Position Inner

Controversial No

Discovery

Year 2018

Method Transit

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#1654of 1771

top 93.3%

This planet

11.10R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

TOI-481 b 11.10 R⊕ TOI-1899 b 11.10 R⊕ TOI-4504 c 11.10 R⊕

Metric	Earth	KOI-3680 b	Jupiter
Radius (R⊕)	1.00	11.10	11.21
Mass (M⊕)	1.00	613.41	317.83
Density (g/cm³)	5.51	2.46	1.33
Surface Gravity (g)	1.00	4.98	2.53
Insolation (S⊕)	1.00	3.30	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	613.412 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 275574174

Gaia DR2

Gaia DR2 2126518783059463168

Gaia DR3

Gaia DR3 2126518783059463168

System

KOI-3680

Percentile among Gas Giant cohort

Radius 11.097 R⊕ · percentile 7 / cohort 1771

Mass 613.412 M⊕ · percentile 54 / cohort 1747

Orbital period 141.24 d · percentile 55 / cohort 1533

Distance 921.99 pc · percentile 85 / cohort 1759

ESI 0.461 · percentile 99 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

141.242 days

Semi-major axis

0.5340 AU

Eccentricity

0.496

Inclination

89.89 °

Year Length

A year here lasts approximately 141.24 Earth days (38.7% of a terrestrial year) on a highly eccentric trajectory at a mean orbital distance of 0.5340 AU.

Transit Fingerprint

Depth

1.299 %

Duration

6.737 h

Impact parameter b

0.150

Rp / R★

0.106460

Transit midpoint (BJD)

2,455,936.6543

Photometric dip

Transit produces a flux drop of 12,991 ppm lasting ≈ 6.74 h.

Extended Orbital Architecture

Planet / star radius ratio

0.106460

Semi-major axis / stellar radius

125.700

Impact parameter (b)

0.150

RV semi-amplitude (K)

87.700 m/s

Transit mid-time (BJD)

2,455,936.6543

Long. of periastron (ω)

154.70°

Angular separation (arcsec)

0.57900

Eq. Temperature

347K

(74 °C)

Insolation (S⊕)

3.30

Earth = 1.00

Earth Similarity (ESI)

0.461

0 = alien, 1 = Earth-identical

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

Detection Signatures

Transit photometry

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

Radial velocity

Stellar wobble has been measured spectroscopically.

Discovery Paper

Primary reference

H Eacute Brard et al. 2019

Instrument

Kepler CCD Array

Publication

2019-03

Observation locale

Space

Discovery cohort

Planets confirmed in 2018 at Kepler (6 shown).

Kepler-411 d · Sub-Neptune Kepler-411 e · Sub-Neptune Kepler-1654 b · Neptune-like Kepler-1656 b · Neptune-like Kepler-1655 b · Sub-Neptune Kepler-730 c · Super-Earth

Host System: KOI-3680

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,830 K — hotter than the Sun (5,778 K)

Estimated Age

3.20 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.960 R☉

Stellar Mass

1.010 M☉

Metallicity [Fe/H]

0.16

Extended Stellar Properties

Surface gravity (log g)

4.473 dex

Stellar density

1.880 g/cm³

Systemic radial velocity

-44.93 km/s

Rotational v·sin i

3.50 km/s

Metallicity ratio

[Fe/H]

Distance

921.99 parsec

Light-years 3,007.11 ly

V-band magnitude

14.62 mag

Voyager-speed travel 53,030,429 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.056 mas

Total Proper Motion

12.059 mas/yr

PM Right Ascension

-11.51 mas/yr

PM Declination

-3.60 mas/yr

Galactic Cartesian (pc)

x = 0.278 · y = -0.646 · z = 0.711

Equatorial (J2000)

RA 293.28153° · Dec 45.30966°

Galactic ℓ, b

77.892° · 12.178°

Ecliptic λ, β

311.886° · 65.398°

HTM-20 index

-1579208343