Key parameters at a glance

A radius of 1.21 Earth radii
A mass of 1.92 Earth masses
Surface gravity around 1.31 g
An orbital period of 5.054 days
Semi-major axis 0.0576 AU
Equilibrium temperature 1,007 K (734 °C)
Distance from Earth 3,050.18 light-years
Earth Similarity Index 0.308
Travel time at Voyager 1 speed 53,789,949 years

1 sibling around Kepler-1894

Kepler-1894 c shares its host star with 1 other confirmed planet. Side-by-side measurements below.

Planet	Type	Radius (R⊕)	Mass (M⊕)	Period (d)	Eq. T (K)	Year
Kepler-1894 b	Rocky Terrestrial	1.20	1.87	2.763	1,231	2021
Kepler-1894 c this	Rocky Terrestrial	1.21	1.92	5.054	1,007	2023

Kepler-1894 c Planet Profile

Physical Specs

Radius

1.21 R⊕

Radius (Jupiter)

0.108 R♃

Mass

1.92 M⊕

Mass (Jupiter)

0.006 M♃

Density

5.96 g/cm³

Surface Gravity

1.31 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.308

HZ Position Inner

Controversial No

Discovery

Year 2023

Method Transit

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#56of 570

top 9.6%

This planet

1.21R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

Kepler-415 b 1.21 R⊕ Kepler-169 c 1.21 R⊕ Kepler-189 b 1.21 R⊕

Metric	Earth	Kepler-1894 c	Jupiter
Radius (R⊕)	1.00	1.21	11.21
Mass (M⊕)	1.00	1.92	317.83
Density (g/cm³)	5.51	5.96	1.33
Surface Gravity (g)	1.00	1.31	2.53
Insolation (S⊕)	1.00	243.06	0.037

Star Catalogue Identifiers

TIC

TIC 27531854

Gaia DR2

Gaia DR2 2134931077802625792

Gaia DR3

Gaia DR3 2134931077802625792

System

Kepler-1894

Percentile among Rocky Terrestrial cohort

Radius 1.210 R⊕ · percentile 87 / cohort 570

Mass 1.920 M⊕ · percentile 80 / cohort 570

Orbital period 5.05 d · percentile 54 / cohort 567

Distance 935.19 pc · percentile 92 / cohort 566

ESI 0.308 · percentile 41 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

5.054 days

Semi-major axis

0.0576 AU

Eccentricity

0.000

Inclination

87.71 °

Year Length

A year here lasts approximately 5.05 Earth days (1.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0576 AU.

Transit Fingerprint

Depth

0.017 %

Duration

2.514 h

Impact parameter b

0.530

Rp / R★

0.012312

Transit midpoint (BJD)

2,454,968.1130

Photometric dip

Transit produces a flux drop of 172 ppm lasting ≈ 2.51 h.

Extended Orbital Architecture

Planet / star radius ratio

0.012312

Semi-major axis / stellar radius

13.270

Impact parameter (b)

0.530

Transit mid-time (BJD)

2,454,968.1130

Angular separation (arcsec)

0.06160

Eq. Temperature

1,007K

(734 °C)

Insolation (S⊕)

243.06

Earth = 1.00

Earth Similarity (ESI)

0.308

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.

Discovery Paper

Primary reference

Valizadegan et al. 2023

Instrument

Kepler CCD Array

Publication

2023-05

Observation locale

Space

Discovery cohort

Planets confirmed in 2023 at Kepler (12 shown).

Kepler-1126 c · Super-Earth Kepler-2000 c · Super-Earth Kepler-1052 c · Sub-Neptune Kepler-311 d · Sub-Neptune Kepler-1996 c · Sub-Neptune Kepler-1162 c · Super-Earth Kepler-1996 b · Sub-Neptune Kepler-1610 c · Sub-Neptune Kepler-1801 c · Sub-Neptune Kepler-1995 b · Neptune-like Kepler-1992 b · Rocky Terrestrial Kepler-1986 b · Super-Earth

Host System: Kepler-1894

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,772 K — cooler than the Sun (5,778 K)

Estimated Age

0.50 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.901 R☉

Stellar Mass

0.999 M☉

Metallicity [Fe/H]

0.00

Extended Stellar Properties

Surface gravity (log g)

4.528 dex

Stellar density

1.730 g/cm³

Metallicity ratio

[Fe/H]

Distance

935.19 parsec

Light-years 3,050.18 ly

V-band magnitude

15.45 mag

Voyager-speed travel 53,789,949 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.041 mas

Total Proper Motion

4.726 mas/yr

PM Right Ascension

-2.68 mas/yr

PM Declination

3.90 mas/yr

Galactic Cartesian (pc)

x = 0.280 · y = -0.584 · z = 0.762

Equatorial (J2000)

RA 295.58646° · Dec 49.66685°

Galactic ℓ, b

82.594° · 12.750°

Ecliptic λ, β

320.259° · 68.685°

HTM-20 index

-287299514