Key parameters at a glance

A radius of 2.59 Earth radii
A mass of 7.22 Earth masses
Surface gravity around 1.08 g
An orbital period of 25.855 days
Semi-major axis 0.1735 AU
Equilibrium temperature 637 K (364 °C)
Distance from Earth 3,347.96 light-years
Earth Similarity Index 0.391
Travel time at Voyager 1 speed 59,041,249 years

Kepler-604 b Planet Profile

Physical Specs

Radius

2.59 R⊕

Radius (Jupiter)

0.231 R♃

Mass

7.22 M⊕

Mass (Jupiter)

0.023 M♃

Density

2.28 g/cm³

Surface Gravity

1.08 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.391

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

#1043of 1978

top 52.7%

This planet

2.59R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-194 c 2.59 R⊕ Kepler-265 e 2.59 R⊕ HD 109833 c 2.59 R⊕

Metric	Earth	Kepler-604 b	Jupiter
Radius (R⊕)	1.00	2.59	11.21
Mass (M⊕)	1.00	7.22	317.83
Density (g/cm³)	5.51	2.28	1.33
Surface Gravity (g)	1.00	1.08	2.53
Insolation (S⊕)	1.00	46.98	0.037

Star Catalogue Identifiers

TIC

TIC 63212809

Gaia DR2

Gaia DR2 2125758402049480704

Gaia DR3

Gaia DR3 2125758402049480704

System

Kepler-604

Percentile among Sub-Neptune cohort

Radius 2.590 R⊕ · percentile 47 / cohort 1978

Mass 7.220 M⊕ · percentile 43 / cohort 1978

Orbital period 25.86 d · percentile 70 / cohort 1946

Distance 1,026.49 pc · percentile 80 / cohort 1975

ESI 0.391 · percentile 50 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

25.855 days

Semi-major axis

0.1735 AU

Eccentricity

0.000

Inclination

89.70 °

Year Length

A year here lasts approximately 25.86 Earth days (7.1% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1735 AU.

Transit Fingerprint

Depth

0.061 %

Duration

3.926 h

Impact parameter b

0.265

Rp / R★

0.023008

Transit midpoint (BJD)

2,455,025.5752

Photometric dip

Transit produces a flux drop of 611 ppm lasting ≈ 3.93 h.

Extended Orbital Architecture

Planet / star radius ratio

0.023008

Semi-major axis / stellar radius

51.470

Impact parameter (b)

0.265

Transit mid-time (BJD)

2,455,025.5752

Angular separation (arcsec)

0.16900

Eq. Temperature

637K

(364 °C)

Insolation (S⊕)

46.98

Earth = 1.00

Earth Similarity (ESI)

0.391

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-604

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,890 K — hotter than the Sun (5,778 K)

Estimated Age

3.72 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.030 R☉

Stellar Mass

1.020 M☉

Metallicity [Fe/H]

-0.02

Extended Stellar Properties

Surface gravity (log g)

4.420 dex

Stellar density

3.618 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,026.49 parsec

Light-years 3,347.96 ly

V-band magnitude

14.79 mag

Voyager-speed travel 59,041,249 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.946 mas

Total Proper Motion

8.430 mas/yr

PM Right Ascension

-5.66 mas/yr

PM Declination

-6.25 mas/yr

Galactic Cartesian (pc)

x = 0.279 · y = -0.681 · z = 0.677

Equatorial (J2000)

RA 292.31598° · Dec 42.62624°

Galactic ℓ, b

75.120° · 11.608°

Ecliptic λ, β

308.189° · 63.137°

HTM-20 index

-246161971