Key parameters at a glance

A radius of 3.64 Earth radii
A mass of 12.90 Earth masses
Surface gravity around 0.97 g
An orbital period of 6.413 days
Semi-major axis 0.0685 AU
Equilibrium temperature 1,069 K (796 °C)
Distance from Earth 3,087.66 light-years
Earth Similarity Index 0.200
Travel time at Voyager 1 speed 54,450,941 years

Kepler-608 b Planet Profile

Physical Specs

Radius

3.64 R⊕

Radius (Jupiter)

0.325 R♃

Mass

12.90 M⊕

Mass (Jupiter)

0.041 M♃

Density

1.47 g/cm³

Surface Gravity

0.97 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.200

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

#120of 1978

top 6.0%

This planet

3.64R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-150 f 3.64 R⊕ Kepler-1635 b 3.64 R⊕ Kepler-565 b 3.64 R⊕

Metric	Earth	Kepler-608 b	Jupiter
Radius (R⊕)	1.00	3.64	11.21
Mass (M⊕)	1.00	12.90	317.83
Density (g/cm³)	5.51	1.47	1.33
Surface Gravity (g)	1.00	0.97	2.53
Insolation (S⊕)	1.00	270.16	0.037

Star Catalogue Identifiers

TIC

TIC 270786157

Gaia DR2

Gaia DR2 2078399790542181376

Gaia DR3

Gaia DR3 2078399790542181376

System

Kepler-608

Percentile among Sub-Neptune cohort

Radius 3.640 R⊕ · percentile 94 / cohort 1978

Mass 12.900 M⊕ · percentile 87 / cohort 1978

Orbital period 6.41 d · percentile 19 / cohort 1946

Distance 946.68 pc · percentile 75 / cohort 1975

ESI 0.200 · percentile 7 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

6.413 days

Semi-major axis

0.0685 AU

Eccentricity

0.000

Inclination

86.11 °

Year Length

A year here lasts approximately 6.41 Earth days (1.8% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0685 AU.

Transit Fingerprint

Depth

0.116 %

Duration

5.309 h

Impact parameter b

0.679

Rp / R★

0.033295

Transit midpoint (BJD)

2,455,002.8796

Photometric dip

Transit produces a flux drop of 1,156 ppm lasting ≈ 5.31 h.

Extended Orbital Architecture

Planet / star radius ratio

0.033295

Semi-major axis / stellar radius

7.180

Impact parameter (b)

0.679

Transit mid-time (BJD)

2,455,002.8796

Angular separation (arcsec)

0.07240

Eq. Temperature

1,069K

(796 °C)

Insolation (S⊕)

270.16

Earth = 1.00

Earth Similarity (ESI)

0.200

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-608

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,820 K — hotter than the Sun (5,778 K)

Estimated Age

3.80 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.010 R☉

Stellar Mass

1.000 M☉

Metallicity [Fe/H]

-0.02

Extended Stellar Properties

Surface gravity (log g)

4.430 dex

Stellar density

0.248 g/cm³

Metallicity ratio

[Fe/H]

Distance

946.68 parsec

Light-years 3,087.66 ly

V-band magnitude

14.84 mag

Voyager-speed travel 54,450,941 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.028 mas

Total Proper Motion

4.705 mas/yr

PM Right Ascension

-0.74 mas/yr

PM Declination

-4.65 mas/yr

Galactic Cartesian (pc)

x = 0.288 · y = -0.651 · z = 0.703

Equatorial (J2000)

RA 293.88290° · Dec 44.63807°

Galactic ℓ, b

77.475° · 11.496°

Ecliptic λ, β

312.220° · 64.616°

HTM-20 index

-1621205296