Key parameters at a glance

A radius of 2.12 Earth radii
A mass of 5.13 Earth masses
Surface gravity around 1.15 g
An orbital period of 10.274 days
Semi-major axis 0.0924 AU
Equilibrium temperature 799 K (526 °C)
Distance from Earth 2,843.46 light-years
Earth Similarity Index 0.337
Travel time at Voyager 1 speed 50,144,425 years

Kepler-1828 b Planet Profile

Physical Specs

Radius

2.12 R⊕

Radius (Jupiter)

0.189 R♃

Mass

5.13 M⊕

Mass (Jupiter)

0.016 M♃

Density

2.98 g/cm³

Surface Gravity

1.15 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.337

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

#1804of 1978

top 91.2%

This planet

2.12R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

K2-412 b 2.12 R⊕ K2-177 b 2.12 R⊕ Kepler-1880 b 2.12 R⊕

Metric	Earth	Kepler-1828 b	Jupiter
Radius (R⊕)	1.00	2.12	11.21
Mass (M⊕)	1.00	5.13	317.83
Density (g/cm³)	5.51	2.98	1.33
Surface Gravity (g)	1.00	1.15	2.53
Insolation (S⊕)	1.00	96.27	0.037

Star Catalogue Identifiers

TIC

TIC 137638020

Gaia DR2

Gaia DR2 2051816485600508544

Gaia DR3

Gaia DR3 2051816485600508544

System

Kepler-1828

Percentile among Sub-Neptune cohort

Radius 2.116 R⊕ · percentile 9 / cohort 1978

Mass 5.130 M⊕ · percentile 10 / cohort 1978

Orbital period 10.27 d · percentile 35 / cohort 1946

Distance 871.81 pc · percentile 71 / cohort 1975

ESI 0.337 · percentile 37 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

10.274 days

Semi-major axis

0.0924 AU

Eccentricity

0.000

Inclination

89.71 °

Year Length

A year here lasts approximately 10.27 Earth days (2.8% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0924 AU.

Transit Fingerprint

Depth

0.035 %

Duration

3.233 h

Impact parameter b

0.847

Rp / R★

0.018604

Transit midpoint (BJD)

2,454,967.6593

Photometric dip

Transit produces a flux drop of 353 ppm lasting ≈ 3.23 h.

Extended Orbital Architecture

Planet / star radius ratio

0.018604

Semi-major axis / stellar radius

24.550

Impact parameter (b)

0.847

Transit mid-time (BJD)

2,454,967.6593

Angular separation (arcsec)

0.10600

Eq. Temperature

799K

(526 °C)

Insolation (S⊕)

96.27

Earth = 1.00

Earth Similarity (ESI)

0.337

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-1828

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,806 K — hotter than the Sun (5,778 K)

Estimated Age

0.40 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

0.899 R☉

Stellar Mass

0.996 M☉

Metallicity [Fe/H]

-0.04

Extended Stellar Properties

Surface gravity (log g)

4.528 dex

Stellar density

2.594 g/cm³

Metallicity ratio

[Fe/H]

Distance

871.81 parsec

Light-years 2,843.46 ly

V-band magnitude

14.99 mag

Voyager-speed travel 50,144,425 yr

Multi-band Host Photometry — 17 bands

Astrometric Data

Parallax

1.119 mas

Total Proper Motion

8.043 mas/yr

PM Right Ascension

4.94 mas/yr

PM Declination

-6.35 mas/yr

Galactic Cartesian (pc)

x = 0.303 · y = -0.735 · z = 0.606

Equatorial (J2000)

RA 292.42760° · Dec 37.32076°

Galactic ℓ, b

70.346° · 9.138°

Ecliptic λ, β

304.998° · 58.066°

HTM-20 index

-2023235266