Key parameters at a glance

A radius of 10.58 Earth radii
A mass of 78.80 Earth masses
Surface gravity around 0.70 g
An orbital period of 1.626 days
Semi-major axis 0.0265 AU
Equilibrium temperature 1,579 K (1306 °C)
Distance from Earth 3,061.68 light-years
Earth Similarity Index 0.078
Travel time at Voyager 1 speed 53,992,641 years

Kepler-685 b Planet Profile

Physical Specs

Radius

10.58 R⊕

Radius (Jupiter)

0.944 R♃

Mass

78.80 M⊕

Mass (Jupiter)

0.248 M♃

Density

0.37 g/cm³

Surface Gravity

0.70 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.078

HZ Position Inner

Controversial No

Discovery

Year 2016

Method Transit

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#1719of 1771

top 97.0%

This planet

10.58R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HAT-P-54 b 10.58 R⊕ TOI-3486 b 10.57 R⊕ K2-114 b 10.59 R⊕

Metric	Earth	Kepler-685 b	Jupiter
Radius (R⊕)	1.00	10.58	11.21
Mass (M⊕)	1.00	78.80	317.83
Density (g/cm³)	5.51	0.37	1.33
Surface Gravity (g)	1.00	0.70	2.53
Insolation (S⊕)	1.00	1,137.12	0.037

Star Catalogue Identifiers

TIC

TIC 138364831

Gaia DR2

Gaia DR2 2052086072113643264

Gaia DR3

Gaia DR3 2052086072113643264

System

Kepler-685

Percentile among Gas Giant cohort

Radius 10.580 R⊕ · percentile 3 / cohort 1771

Mass 78.800 M⊕ · percentile 2 / cohort 1747

Orbital period 1.63 d · percentile 4 / cohort 1533

Distance 938.72 pc · percentile 86 / cohort 1759

ESI 0.078 · percentile 17 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

1.626 days

Semi-major axis

0.0265 AU

Eccentricity

0.000

Inclination

89.22 °

Year Length

A year here lasts approximately 1.63 Earth days (0.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0265 AU.

Transit Fingerprint

Depth

0.797 %

Duration

2.388 h

Impact parameter b

0.076

Rp / R★

0.084375

Transit midpoint (BJD)

2,455,003.8267

Photometric dip

Transit produces a flux drop of 7,969 ppm lasting ≈ 2.39 h.

Extended Orbital Architecture

Planet / star radius ratio

0.084375

Semi-major axis / stellar radius

5.674

Impact parameter (b)

0.076

Transit mid-time (BJD)

2,455,003.8267

Angular separation (arcsec)

0.02820

Eq. Temperature

1,579K

(1306 °C)

Insolation (S⊕)

1,137.12

Earth = 1.00

Earth Similarity (ESI)

0.078

0 = alien, 1 = Earth-identical

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

Discovery Paper

Primary reference

Morton et al. 2016

Instrument

Kepler CCD Array

Publication

2016-05

Observation locale

Space

Discovery cohort

Planets confirmed in 2016 at Kepler (12 shown).

Kepler-1512 b · Rocky Terrestrial Kepler-1410 b · Super-Earth Kepler-560 b · Super-Earth Kepler-1389 b · Super-Earth Kepler-1450 b · Super-Earth Kepler-1544 b · Super-Earth Kepler-1459 b · Super-Earth Kepler-1638 b · Super-Earth Kepler-737 b · Super-Earth Kepler-1185 b · Super-Earth Kepler-1178 b · Rocky Terrestrial Kepler-1040 b · Sub-Neptune

Host System: Kepler-685

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,963 K — hotter than the Sun (5,778 K)

Estimated Age

3.39 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.160 R☉

Stellar Mass

1.110 M☉

Metallicity [Fe/H]

0.15

Extended Stellar Properties

Surface gravity (log g)

4.360 dex

Stellar density

1.282 g/cm³

Metallicity ratio

[Fe/H]

Distance

938.72 parsec

Light-years 3,061.68 ly

V-band magnitude

15.19 mag

Voyager-speed travel 53,992,641 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.038 mas

Total Proper Motion

6.653 mas/yr

PM Right Ascension

-0.30 mas/yr

PM Declination

-6.65 mas/yr

Galactic Cartesian (pc)

x = 0.317 · y = -0.716 · z = 0.621

Equatorial (J2000)

RA 293.87191° · Dec 38.42292°

Galactic ℓ, b

71.869° · 8.638°

Ecliptic λ, β

307.704° · 58.777°

HTM-20 index

1137194379