Key parameters at a glance

A radius of 1.96 Earth radii
A mass of 4.50 Earth masses
Surface gravity around 1.17 g
An orbital period of 52.610 days
Semi-major axis 0.2846 AU
Equilibrium temperature 553 K (280 °C)
Distance from Earth 3,231.68 light-years
Earth Similarity Index 0.496
Travel time at Voyager 1 speed 56,990,631 years

Kepler-1923 b Planet Profile

Physical Specs

Radius

1.96 R⊕

Radius (Jupiter)

0.175 R♃

Mass

4.50 M⊕

Mass (Jupiter)

0.014 M♃

Density

3.29 g/cm³

Surface Gravity

1.17 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.496

HZ Position Inner

Controversial No

Discovery

Year 2021

Method Transit

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#65of 1176

top 5.4%

This planet

1.96R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-792 b 1.96 R⊕ Kepler-174 b 1.96 R⊕ Kepler-118 b 1.96 R⊕

Metric	Earth	Kepler-1923 b	Jupiter
Radius (R⊕)	1.00	1.96	11.21
Mass (M⊕)	1.00	4.50	317.83
Density (g/cm³)	5.51	3.29	1.33
Surface Gravity (g)	1.00	1.17	2.53
Insolation (S⊕)	1.00	8.63	0.037

Star Catalogue Identifiers

TIC

TIC 170346220

Gaia DR2

Gaia DR2 2073768407039581952

Gaia DR3

Gaia DR3 2073768407058939648

System

Kepler-1923

Percentile among Super-Earth cohort

Radius 1.960 R⊕ · percentile 94 / cohort 1176

Mass 4.500 M⊕ · percentile 86 / cohort 1176

Orbital period 52.61 d · percentile 96 / cohort 1164

Distance 990.84 pc · percentile 80 / cohort 1171

ESI 0.496 · percentile 72 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

52.610 days

Semi-major axis

0.2846 AU

Eccentricity

0.000

Inclination

89.88 °

Year Length

A year here lasts approximately 52.61 Earth days (14.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.2846 AU.

Transit Fingerprint

Depth

0.020 %

Duration

8.202 h

Impact parameter b

0.102

Rp / R★

0.012978

Transit midpoint (BJD)

2,454,991.6253

Photometric dip

Transit produces a flux drop of 204 ppm lasting ≈ 8.20 h.

Extended Orbital Architecture

Planet / star radius ratio

0.012978

Semi-major axis / stellar radius

48.700

Impact parameter (b)

0.102

Transit mid-time (BJD)

2,454,991.6253

Angular separation (arcsec)

0.28700

Eq. Temperature

553K

(280 °C)

Insolation (S⊕)

8.63

Earth = 1.00

Earth Similarity (ESI)

0.496

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

Valizadegan et al. 2022

Instrument

Kepler CCD Array

Publication

2022-02

Observation locale

Space

Discovery cohort

Planets confirmed in 2021 at Kepler (12 shown).

Kepler-1816 b · Super-Earth Kepler-1705 c · Sub-Neptune Kepler-1948 b · Rocky Terrestrial Kepler-196 d · Sub-Neptune Kepler-1853 b · Super-Earth Kepler-1840 b · Sub-Neptune Kepler-1881 b · Sub-Neptune Kepler-1858 b · Sub-Neptune Kepler-1874 b · Sub-Neptune Kepler-1802 c · Sub-Neptune Kepler-1749 b · Super-Earth Kepler-1849 b · Sub-Neptune

Host System: Kepler-1923

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,881 K — hotter than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

1.294 R☉

Stellar Mass

1.109 M☉

Metallicity [Fe/H]

0.16

Extended Stellar Properties

Surface gravity (log g)

4.259 dex

Stellar density

0.823 g/cm³

Metallicity ratio

[Fe/H]

Distance

990.84 parsec

Light-years 3,231.68 ly

V-band magnitude

14.45 mag

Voyager-speed travel 56,990,631 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Total Proper Motion

10.432 mas/yr

PM Right Ascension

10.37 mas/yr

PM Declination

-1.16 mas/yr

Galactic Cartesian (pc)

x = 0.359 · y = -0.672 · z = 0.647

Equatorial (J2000)

RA 298.08345° · Dec 40.34626°

Galactic ℓ, b

75.158° · 6.724°

Ecliptic λ, β

314.947° · 59.480°

HTM-20 index

-605223344