Key parameters at a glance

A radius of 1.22 Earth radii
A mass of 1.98 Earth masses
Surface gravity around 1.33 g
An orbital period of 0.767 days
Semi-major axis 0.0150 AU
Equilibrium temperature 1,541 K (1268 °C)
Distance from Earth 1,632.07 light-years
Earth Similarity Index 0.190
Travel time at Voyager 1 speed 28,781,523 years
Almost certainly tidally locked to its host star given the close orbit

1 sibling around Kepler-1834

Kepler-1834 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-1834 c this	Rocky Terrestrial	1.22	1.98	0.767	1,541	2023
Kepler-1834 b	Super-Earth	1.46	2.73	4.603	848	2021

Kepler-1834 c Planet Profile

Physical Specs

Radius

1.22 R⊕

Radius (Jupiter)

0.109 R♃

Mass

1.98 M⊕

Mass (Jupiter)

0.006 M♃

Density

5.99 g/cm³

Surface Gravity

1.33 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.190

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

#35of 570

top 6.0%

This planet

1.22R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

Kepler-295 b 1.22 R⊕ Kepler-226 d 1.22 R⊕ Kepler-197 d 1.22 R⊕

Metric	Earth	Kepler-1834 c	Jupiter
Radius (R⊕)	1.00	1.22	11.21
Mass (M⊕)	1.00	1.98	317.83
Density (g/cm³)	5.51	5.99	1.33
Surface Gravity (g)	1.00	1.33	2.53
Insolation (S⊕)	1.00	1,334.22	0.037

Star Catalogue Identifiers

TIC

TIC 378087161

Gaia DR2

Gaia DR2 2076454445237794432

Gaia DR3

Gaia DR3 2076454445237794432

System

Kepler-1834

Percentile among Rocky Terrestrial cohort

Radius 1.220 R⊕ · percentile 92 / cohort 570

Mass 1.980 M⊕ · percentile 83 / cohort 570

Orbital period 0.77 d · percentile 8 / cohort 567

Distance 500.40 pc · percentile 64 / cohort 566

ESI 0.190 · percentile 12 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

0.767 days

Semi-major axis

0.0150 AU

Eccentricity

0.000

Inclination

84.94 °

Year Length

A year here lasts roughly 18.4 hours long on a nearly circular orbit at a mean orbital distance of 0.0150 AU.

Transit Fingerprint

Depth

0.024 %

Duration

1.264 h

Impact parameter b

0.388

Rp / R★

0.014221

Transit midpoint (BJD)

2,454,965.1967

Photometric dip

Transit produces a flux drop of 244 ppm lasting ≈ 1.26 h.

Extended Orbital Architecture

Planet / star radius ratio

0.014221

Semi-major axis / stellar radius

4.390

Impact parameter (b)

0.388

Transit mid-time (BJD)

2,454,965.1967

Angular separation (arcsec)

0.03000

Eq. Temperature

1,541K

(1268 °C)

Insolation (S⊕)

1,334.22

Earth = 1.00

Earth Similarity (ESI)

0.190

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched. Close-orbiting tidally-locked around a cool host.

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-1834

Spectral Class

K-type orange

Effective Temperature

4,821 K — cooler than the Sun (5,778 K)

Estimated Age

12.20 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

0.788 R☉

Stellar Mass

0.765 M☉

Metallicity [Fe/H]

0.16

Extended Stellar Properties

Surface gravity (log g)

4.529 dex

Stellar density

2.732 g/cm³

Metallicity ratio

[Fe/H]

Distance

500.40 parsec

Light-years 1,632.07 ly

V-band magnitude

15.18 mag

Voyager-speed travel 28,781,523 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.970 mas

Total Proper Motion

7.174 mas/yr

PM Right Ascension

-5.40 mas/yr

PM Declination

4.72 mas/yr

Galactic Cartesian (pc)

x = 0.321 · y = -0.698 · z = 0.640

Equatorial (J2000)

RA 294.66468° · Dec 39.78385°

Galactic ℓ, b

73.376° · 8.735°

Ecliptic λ, β

309.702° · 59.869°

HTM-20 index

1156581354