Key parameters at a glance

A radius of 2.83 Earth radii
A mass of 8.40 Earth masses
Surface gravity around 1.05 g
An orbital period of 2.752 days
Semi-major axis 0.0384 AU
Equilibrium temperature 1,178 K (905 °C)
Distance from Earth 1,908.62 light-years
Earth Similarity Index 0.199
Travel time at Voyager 1 speed 33,658,556 years

Kepler-585 b Planet Profile

Physical Specs

Radius

2.83 R⊕

Radius (Jupiter)

0.252 R♃

Mass

8.40 M⊕

Mass (Jupiter)

0.026 M♃

Density

2.04 g/cm³

Surface Gravity

1.05 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.199

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

#703of 1978

top 35.5%

This planet

2.83R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

HD 3167 e 2.83 R⊕ GJ 3634 b 2.83 R⊕ Kepler-1099 b 2.83 R⊕

Metric	Earth	Kepler-585 b	Jupiter
Radius (R⊕)	1.00	2.83	11.21
Mass (M⊕)	1.00	8.40	317.83
Density (g/cm³)	5.51	2.04	1.33
Surface Gravity (g)	1.00	1.05	2.53
Insolation (S⊕)	1.00	489.15	0.037

Star Catalogue Identifiers

TIC

TIC 158276273

Gaia DR2

Gaia DR2 2105694410784851072

Gaia DR3

Gaia DR3 2105694410784851072

System

Kepler-585

Percentile among Sub-Neptune cohort

Radius 2.830 R⊕ · percentile 64 / cohort 1978

Mass 8.400 M⊕ · percentile 58 / cohort 1978

Orbital period 2.75 d · percentile 4 / cohort 1946

Distance 585.19 pc · percentile 52 / cohort 1975

ESI 0.199 · percentile 7 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

2.752 days

Semi-major axis

0.0384 AU

Eccentricity

0.000

Inclination

87.36 °

Year Length

A year here lasts approximately 2.75 Earth days (0.8% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0384 AU.

Transit Fingerprint

Depth

0.082 %

Duration

2.115 h

Impact parameter b

0.780

Rp / R★

0.028477

Transit midpoint (BJD)

2,455,004.2597

Photometric dip

Transit produces a flux drop of 819 ppm lasting ≈ 2.12 h.

Extended Orbital Architecture

Planet / star radius ratio

0.028477

Semi-major axis / stellar radius

6.600

Impact parameter (b)

0.780

Transit mid-time (BJD)

2,455,004.2597

Angular separation (arcsec)

0.06560

Eq. Temperature

1,178K

(905 °C)

Insolation (S⊕)

489.15

Earth = 1.00

Earth Similarity (ESI)

0.199

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-585

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,593 K — cooler than the Sun (5,778 K)

Estimated Age

3.63 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.930 R☉

Stellar Mass

0.960 M☉

Metallicity [Fe/H]

0.03

Extended Stellar Properties

Surface gravity (log g)

4.490 dex

Stellar density

1.350 g/cm³

Metallicity ratio

[Fe/H]

Distance

585.19 parsec

Light-years 1,908.62 ly

V-band magnitude

14.19 mag

Voyager-speed travel 33,658,556 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.680 mas

Total Proper Motion

4.513 mas/yr

PM Right Ascension

1.04 mas/yr

PM Declination

-4.39 mas/yr

Galactic Cartesian (pc)

x = 0.205 · y = -0.691 · z = 0.693

Equatorial (J2000)

RA 286.52849° · Dec 43.87338°

Galactic ℓ, b

74.494° · 15.960°

Ecliptic λ, β

299.777° · 65.613°

HTM-20 index

64507886