Key parameters at a glance

A radius of 3.35 Earth radii
A mass of 11.20 Earth masses
Surface gravity around 1.00 g
An orbital period of 6.521 days
Semi-major axis 0.0682 AU
Equilibrium temperature 932 K (659 °C)
Distance from Earth 3,476.24 light-years
Earth Similarity Index 0.240
Travel time at Voyager 1 speed 61,303,416 years

Kepler-609 b Planet Profile

Physical Specs

Radius

3.35 R⊕

Radius (Jupiter)

0.299 R♃

Mass

11.20 M⊕

Mass (Jupiter)

0.035 M♃

Density

1.64 g/cm³

Surface Gravity

1.00 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.240

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

#250of 1978

top 12.6%

This planet

3.35R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-1451 b 3.35 R⊕ HD 103949 b 3.35 R⊕ HD 13808 b 3.35 R⊕

Metric	Earth	Kepler-609 b	Jupiter
Radius (R⊕)	1.00	3.35	11.21
Mass (M⊕)	1.00	11.20	317.83
Density (g/cm³)	5.51	1.64	1.33
Surface Gravity (g)	1.00	1.00	2.53
Insolation (S⊕)	1.00	258.06	0.037

Star Catalogue Identifiers

TIC

TIC 63126989

Gaia DR2

Gaia DR2 2126580149550929280

Gaia DR3

Gaia DR3 2126580149550929280

System

Kepler-609

Percentile among Sub-Neptune cohort

Radius 3.350 R⊕ · percentile 87 / cohort 1978

Mass 11.200 M⊕ · percentile 81 / cohort 1978

Orbital period 6.52 d · percentile 20 / cohort 1946

Distance 1,065.82 pc · percentile 82 / cohort 1975

ESI 0.240 · percentile 14 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

6.521 days

Semi-major axis

0.0682 AU

Eccentricity

0.000

Inclination

88.14 °

Year Length

A year here lasts approximately 6.52 Earth days (1.8% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0682 AU.

Transit Fingerprint

Depth

0.076 %

Duration

2.809 h

Impact parameter b

0.907

Rp / R★

0.026505

Transit midpoint (BJD)

2,455,008.7108

Photometric dip

Transit produces a flux drop of 760 ppm lasting ≈ 2.81 h.

Extended Orbital Architecture

Planet / star radius ratio

0.026505

Semi-major axis / stellar radius

8.100

Impact parameter (b)

0.907

Transit mid-time (BJD)

2,455,008.7108

Angular separation (arcsec)

0.06400

Eq. Temperature

932K

(659 °C)

Insolation (S⊕)

258.06

Earth = 1.00

Earth Similarity (ESI)

0.240

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-609

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,971 K — hotter than the Sun (5,778 K)

Estimated Age

3.72 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.140 R☉

Stellar Mass

1.090 M☉

Metallicity [Fe/H]

0.06

Extended Stellar Properties

Surface gravity (log g)

4.360 dex

Stellar density

1.762 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,065.82 parsec

Light-years 3,476.24 ly

V-band magnitude

14.96 mag

Voyager-speed travel 61,303,416 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.910 mas

Total Proper Motion

7.001 mas/yr

PM Right Ascension

-2.46 mas/yr

PM Declination

-6.56 mas/yr

Galactic Cartesian (pc)

x = 0.269 · y = -0.658 · z = 0.703

Equatorial (J2000)

RA 292.22030° · Dec 44.69999°

Galactic ℓ, b

76.994° · 12.582°

Ecliptic λ, β

309.683° · 65.107°

HTM-20 index

-798063264