Key parameters at a glance

A radius of 1.64 Earth radii
A mass of 3.33 Earth masses
Surface gravity around 1.24 g
An orbital period of 25.309 days
Semi-major axis 0.1727 AU
Equilibrium temperature 710 K (437 °C)
Distance from Earth 1,058.76 light-years
Earth Similarity Index 0.415
Travel time at Voyager 1 speed 18,671,251 years

Kepler-508 b Planet Profile

Physical Specs

Radius

1.64 R⊕

Radius (Jupiter)

0.146 R♃

Mass

3.33 M⊕

Mass (Jupiter)

0.011 M♃

Density

4.15 g/cm³

Surface Gravity

1.24 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.415

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

#495of 1176

top 42.0%

This planet

1.64R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-46 d 1.64 R⊕ Kepler-179 b 1.64 R⊕ Kepler-247 b 1.64 R⊕

Metric	Earth	Kepler-508 b	Jupiter
Radius (R⊕)	1.00	1.64	11.21
Mass (M⊕)	1.00	3.33	317.83
Density (g/cm³)	5.51	4.15	1.33
Surface Gravity (g)	1.00	1.24	2.53
Insolation (S⊕)	1.00	60.37	0.037

Star Catalogue Identifiers

TIC

TIC 271671025

Gaia DR2

Gaia DR2 2078008703696509056

Gaia DR3

Gaia DR3 2078008703696509056

System

Kepler-508

Percentile among Super-Earth cohort

Radius 1.640 R⊕ · percentile 56 / cohort 1176

Mass 3.330 M⊕ · percentile 51 / cohort 1176

Orbital period 25.31 d · percentile 89 / cohort 1164

Distance 324.62 pc · percentile 34 / cohort 1171

ESI 0.415 · percentile 63 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

25.309 days

Semi-major axis

0.1727 AU

Eccentricity

0.000

Inclination

87.81 °

Year Length

A year here lasts approximately 25.31 Earth days (6.9% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1727 AU.

Transit Fingerprint

Depth

0.016 %

Duration

5.683 h

Impact parameter b

0.710

Rp / R★

0.012212

Transit midpoint (BJD)

2,455,004.5064

Photometric dip

Transit produces a flux drop of 155 ppm lasting ≈ 5.68 h.

Extended Orbital Architecture

Planet / star radius ratio

0.012212

Semi-major axis / stellar radius

17.200

Impact parameter (b)

0.710

Transit mid-time (BJD)

2,455,004.5064

Angular separation (arcsec)

0.53200

Eq. Temperature

710K

(437 °C)

Insolation (S⊕)

60.37

Earth = 1.00

Earth Similarity (ESI)

0.415

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

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-508

Spectral Class

F-type yellow-white

Effective Temperature

6,025 K — hotter than the Sun (5,778 K)

Estimated Age

3.55 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.250 R☉

Stellar Mass

1.160 M☉

Metallicity [Fe/H]

0.18

Extended Stellar Properties

Surface gravity (log g)

4.300 dex

Stellar density

0.620 g/cm³

Systemic radial velocity

15.06 km/s

Metallicity ratio

[Fe/H]

Distance

324.62 parsec

Light-years 1,058.76 ly

V-band magnitude

11.59 mag

Voyager-speed travel 18,671,251 yr

Multi-band Host Photometry — 14 bands

Astrometric Data

Parallax

3.052 mas

Total Proper Motion

35.056 mas/yr

PM Right Ascension

-12.80 mas/yr

PM Declination

-32.64 mas/yr

Galactic Cartesian (pc)

x = 0.314 · y = -0.661 · z = 0.682

Equatorial (J2000)

RA 295.40425° · Dec 42.98128°

Galactic ℓ, b

76.497° · 9.756°

Ecliptic λ, β

313.119° · 62.669°

HTM-20 index

-1384537185