Key parameters at a glance

A radius of 4.21 Earth radii
A mass of 16.50 Earth masses
Surface gravity around 0.93 g
An orbital period of 35.181 days
Semi-major axis 0.2281 AU
Equilibrium temperature 664 K (391 °C)
Distance from Earth 6,030.10 light-years
Earth Similarity Index 0.308
Travel time at Voyager 1 speed 106,340,853 years

Kepler-584 b Planet Profile

Physical Specs

Radius

4.21 R⊕

Radius (Jupiter)

0.376 R♃

Mass

16.50 M⊕

Mass (Jupiter)

0.052 M♃

Density

1.22 g/cm³

Surface Gravity

0.93 g (Earth)

Classification

Planet Type

Neptune-like

ESI Score 0.308

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

#514of 574

top 89.4%

This planet

4.21R⊕

Neptune-like median

6.39R⊕

Nearest-size peers

Kepler-149 b 4.21 R⊕ Kepler-953 b 4.21 R⊕ Kepler-511 c 4.21 R⊕

Metric	Earth	Kepler-584 b	Jupiter
Radius (R⊕)	1.00	4.21	11.21
Mass (M⊕)	1.00	16.50	317.83
Density (g/cm³)	5.51	1.22	1.33
Surface Gravity (g)	1.00	0.93	2.53
Insolation (S⊕)	1.00	76.34	0.037

Star Catalogue Identifiers

TIC

TIC 158722119

Gaia DR2

Gaia DR2 2102518574527334016

Gaia DR3

Gaia DR3 2102518574527334016

System

Kepler-584

Percentile among Neptune-like cohort

Radius 4.210 R⊕ · percentile 10 / cohort 574

Mass 16.500 M⊕ · percentile 15 / cohort 574

Orbital period 35.18 d · percentile 63 / cohort 524

Distance 1,848.84 pc · percentile 88 / cohort 572

ESI 0.308 · percentile 51 / cohort 574

Orbit & Habitability

Orbital Dynamics

Period

35.181 days

Semi-major axis

0.2281 AU

Eccentricity

0.000

Inclination

88.18 °

Year Length

A year here lasts approximately 35.18 Earth days (9.6% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.2281 AU.

Transit Fingerprint

Depth

0.102 %

Duration

7.373 h

Impact parameter b

0.799

Rp / R★

0.031128

Transit midpoint (BJD)

2,455,003.0998

Photometric dip

Transit produces a flux drop of 1,025 ppm lasting ≈ 7.37 h.

Extended Orbital Architecture

Planet / star radius ratio

0.031128

Semi-major axis / stellar radius

22.900

Impact parameter (b)

0.799

Transit mid-time (BJD)

2,455,003.0998

Angular separation (arcsec)

0.12300

Eq. Temperature

664K

(391 °C)

Insolation (S⊕)

76.34

Earth = 1.00

Earth Similarity (ESI)

0.308

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-584

Spectral Class

F-type yellow-white

Effective Temperature

6,195 K — hotter than the Sun (5,778 K)

Estimated Age

2.88 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.240 R☉

Stellar Mass

1.170 M☉

Metallicity [Fe/H]

0.02

Extended Stellar Properties

Surface gravity (log g)

4.310 dex

Stellar density

0.345 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,848.84 parsec

Light-years 6,030.10 ly

V-band magnitude

14.97 mag

Voyager-speed travel 106,340,853 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.512 mas

Total Proper Motion

3.743 mas/yr

PM Right Ascension

-0.13 mas/yr

PM Declination

3.74 mas/yr

Galactic Cartesian (pc)

x = 0.231 · y = -0.701 · z = 0.674

Equatorial (J2000)

RA 288.23062° · Dec 42.41362°

Galactic ℓ, b

73.612° · 14.244°

Ecliptic λ, β

301.620° · 63.865°

HTM-20 index

-1947726849