Key parameters at a glance

A radius of 1.38 Earth radii
A mass of 2.48 Earth masses
Surface gravity around 1.30 g
An orbital period of 6.934 days
Semi-major axis 0.0759 AU
Equilibrium temperature 1,104 K (831 °C)
Distance from Earth 3,262.47 light-years
Earth Similarity Index 0.275
Travel time at Voyager 1 speed 57,533,712 years

Kepler-923 b Planet Profile

Physical Specs

Radius

1.38 R⊕

Radius (Jupiter)

0.123 R♃

Mass

2.48 M⊕

Mass (Jupiter)

0.008 M♃

Density

5.19 g/cm³

Surface Gravity

1.30 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.275

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

#953of 1176

top 81.0%

This planet

1.38R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-402 d 1.38 R⊕ Kepler-84 d 1.38 R⊕ Kepler-353 c 1.38 R⊕

Metric	Earth	Kepler-923 b	Jupiter
Radius (R⊕)	1.00	1.38	11.21
Mass (M⊕)	1.00	2.48	317.83
Density (g/cm³)	5.51	5.19	1.33
Surface Gravity (g)	1.00	1.30	2.53
Insolation (S⊕)	1.00	390.64	0.037

Star Catalogue Identifiers

TIC

TIC 138574253

Gaia DR2

Gaia DR2 2076517323560360576

Gaia DR3

Gaia DR3 2076517323560360576

System

Kepler-923

Percentile among Super-Earth cohort

Radius 1.380 R⊕ · percentile 18 / cohort 1176

Mass 2.480 M⊕ · percentile 18 / cohort 1176

Orbital period 6.93 d · percentile 52 / cohort 1164

Distance 1,000.28 pc · percentile 80 / cohort 1171

ESI 0.275 · percentile 30 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

6.934 days

Semi-major axis

0.0759 AU

Eccentricity

0.000

Inclination

80.20 °

Year Length

A year here lasts approximately 6.93 Earth days (1.9% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0759 AU.

Transit Fingerprint

Depth

0.012 %

Duration

4.322 h

Impact parameter b

0.803

Rp / R★

0.010401

Transit midpoint (BJD)

2,454,970.0724

Photometric dip

Transit produces a flux drop of 120 ppm lasting ≈ 4.32 h.

Extended Orbital Architecture

Planet / star radius ratio

0.010401

Semi-major axis / stellar radius

12.280

Impact parameter (b)

0.803

Transit mid-time (BJD)

2,454,970.0724

Angular separation (arcsec)

0.07590

Eq. Temperature

1,104K

(831 °C)

Insolation (S⊕)

390.64

Earth = 1.00

Earth Similarity (ESI)

0.275

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-923

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,988 K — hotter than the Sun (5,778 K)

Estimated Age

4.68 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.260 R☉

Stellar Mass

1.110 M☉

Metallicity [Fe/H]

0.07

Extended Stellar Properties

Surface gravity (log g)

4.280 dex

Stellar density

0.590 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,000.28 parsec

Light-years 3,262.47 ly

V-band magnitude

14.12 mag

Voyager-speed travel 57,533,712 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.971 mas

Total Proper Motion

4.821 mas/yr

PM Right Ascension

-0.41 mas/yr

PM Declination

-4.80 mas/yr

Galactic Cartesian (pc)

x = 0.313 · y = -0.698 · z = 0.644

Equatorial (J2000)

RA 294.17108° · Dec 40.05514°

Galactic ℓ, b

73.439° · 9.196°

Ecliptic λ, β

309.165° · 60.250°

HTM-20 index

2078655071