Key parameters at a glance

A radius of 3.01 Earth radii
A mass of 9.32 Earth masses
Surface gravity around 1.03 g
An orbital period of 9.071 days
Semi-major axis 0.0854 AU
Equilibrium temperature 825 K (552 °C)
Distance from Earth 2,406.06 light-years
Earth Similarity Index 0.285
Travel time at Voyager 1 speed 42,430,854 years

Kepler-623 b Planet Profile

Physical Specs

Radius

3.01 R⊕

Radius (Jupiter)

0.269 R♃

Mass

9.32 M⊕

Mass (Jupiter)

0.029 M♃

Density

1.88 g/cm³

Surface Gravity

1.03 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.285

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

#509of 1978

top 25.7%

This planet

3.01R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-679 b 3.01 R⊕ Kepler-1036 b 3.01 R⊕ Kepler-414 c 3.01 R⊕

Metric	Earth	Kepler-623 b	Jupiter
Radius (R⊕)	1.00	3.01	11.21
Mass (M⊕)	1.00	9.32	317.83
Density (g/cm³)	5.51	1.88	1.33
Surface Gravity (g)	1.00	1.03	2.53
Insolation (S⊕)	1.00	77.10	0.037

Star Catalogue Identifiers

TIC

TIC 272842291

Gaia DR2

Gaia DR2 2086388807671765504

Gaia DR3

Gaia DR3 2086388807671765504

System

Kepler-623

Percentile among Sub-Neptune cohort

Radius 3.010 R⊕ · percentile 74 / cohort 1978

Mass 9.320 M⊕ · percentile 68 / cohort 1978

Orbital period 9.07 d · percentile 30 / cohort 1946

Distance 737.70 pc · percentile 61 / cohort 1975

ESI 0.285 · percentile 24 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

9.071 days

Semi-major axis

0.0854 AU

Eccentricity

0.000

Inclination

89.97 °

Year Length

A year here lasts approximately 9.07 Earth days (2.5% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0854 AU.

Transit Fingerprint

Depth

0.103 %

Duration

2.709 h

Impact parameter b

0.013

Rp / R★

0.031792

Transit midpoint (BJD)

2,455,011.3433

Photometric dip

Transit produces a flux drop of 1,026 ppm lasting ≈ 2.71 h.

Extended Orbital Architecture

Planet / star radius ratio

0.031792

Semi-major axis / stellar radius

26.509

Impact parameter (b)

0.013

Transit mid-time (BJD)

2,455,011.3433

Angular separation (arcsec)

0.11600

Eq. Temperature

825K

(552 °C)

Insolation (S⊕)

77.10

Earth = 1.00

Earth Similarity (ESI)

0.285

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-623

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,443 K — cooler than the Sun (5,778 K)

Estimated Age

4.47 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.860 R☉

Stellar Mass

0.900 M☉

Metallicity [Fe/H]

-0.03

Extended Stellar Properties

Surface gravity (log g)

4.530 dex

Stellar density

4.283 g/cm³

Metallicity ratio

[Fe/H]

Distance

737.70 parsec

Light-years 2,406.06 ly

V-band magnitude

15.03 mag

Voyager-speed travel 42,430,854 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.327 mas

Total Proper Motion

8.715 mas/yr

PM Right Ascension

-2.74 mas/yr

PM Declination

-8.27 mas/yr

Galactic Cartesian (pc)

x = 0.307 · y = -0.602 · z = 0.737

Equatorial (J2000)

RA 296.98673° · Dec 47.47735°

Galactic ℓ, b

81.057° · 10.909°

Ecliptic λ, β

319.770° · 66.315°

HTM-20 index

1250649602