Key parameters at a glance

A radius of 2.48 Earth radii
A mass of 6.71 Earth masses
Surface gravity around 1.09 g
An orbital period of 5.187 days
Semi-major axis 0.0559 AU
Equilibrium temperature 860 K (587 °C)
Distance from Earth 2,217.60 light-years
Earth Similarity Index 0.295
Travel time at Voyager 1 speed 39,107,429 years

Kepler-1829 b Planet Profile

Physical Specs

Radius

2.48 R⊕

Radius (Jupiter)

0.221 R♃

Mass

6.71 M⊕

Mass (Jupiter)

0.021 M♃

Density

2.42 g/cm³

Surface Gravity

1.09 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.295

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

#1222of 1978

top 61.7%

This planet

2.48R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

TOI-1753 b 2.48 R⊕ Kepler-266 b 2.48 R⊕ Kepler-256 d 2.48 R⊕

Metric	Earth	Kepler-1829 b	Jupiter
Radius (R⊕)	1.00	2.48	11.21
Mass (M⊕)	1.00	6.71	317.83
Density (g/cm³)	5.51	2.42	1.33
Surface Gravity (g)	1.00	1.09	2.53
Insolation (S⊕)	1.00	129.37	0.037

Star Catalogue Identifiers

TIC

TIC 299028577

Gaia DR2

Gaia DR2 2133457388621345024

Gaia DR3

Gaia DR3 2133457388621345024

System

Kepler-1829

Percentile among Sub-Neptune cohort

Radius 2.479 R⊕ · percentile 38 / cohort 1978

Mass 6.710 M⊕ · percentile 36 / cohort 1978

Orbital period 5.19 d · percentile 13 / cohort 1946

Distance 679.92 pc · percentile 58 / cohort 1975

ESI 0.295 · percentile 26 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

5.187 days

Semi-major axis

0.0559 AU

Eccentricity

0.000

Inclination

88.44 °

Year Length

A year here lasts approximately 5.19 Earth days (1.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0559 AU.

Transit Fingerprint

Depth

0.071 %

Duration

0.802 h

Impact parameter b

0.825

Rp / R★

0.025998

Transit midpoint (BJD)

2,454,967.9951

Photometric dip

Transit produces a flux drop of 713 ppm lasting ≈ 0.80 h.

Extended Orbital Architecture

Planet / star radius ratio

0.025998

Semi-major axis / stellar radius

30.300

Impact parameter (b)

0.825

Transit mid-time (BJD)

2,454,967.9951

Angular separation (arcsec)

0.08220

Eq. Temperature

860K

(587 °C)

Insolation (S⊕)

129.37

Earth = 1.00

Earth Similarity (ESI)

0.295

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-1829

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,230 K — cooler than the Sun (5,778 K)

Estimated Age

4.40 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.777 R☉

Stellar Mass

0.873 M☉

Metallicity [Fe/H]

0.00

Extended Stellar Properties

Surface gravity (log g)

4.594 dex

Stellar density

19.640 g/cm³

Metallicity ratio

[Fe/H]

Distance

679.92 parsec

Light-years 2,217.60 ly

V-band magnitude

15.22 mag

Voyager-speed travel 39,107,429 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.442 mas

Total Proper Motion

16.224 mas/yr

PM Right Ascension

-8.92 mas/yr

PM Declination

-13.55 mas/yr

Galactic Cartesian (pc)

x = 0.199 · y = -0.590 · z = 0.783

Equatorial (J2000)

RA 288.66448° · Dec 51.49838°

Galactic ℓ, b

82.434° · 17.506°

Ecliptic λ, β

310.916° · 72.292°

HTM-20 index

236857221