Key parameters at a glance

A radius of 3.07 Earth radii
A mass of 9.65 Earth masses
Surface gravity around 1.02 g
An orbital period of 59.362 days
Semi-major axis 0.3088 AU
Equilibrium temperature 566 K (293 °C)
Distance from Earth 1,657.53 light-years
Earth Similarity Index 0.409
Travel time at Voyager 1 speed 29,230,506 years

Kepler-1929 b Planet Profile

Physical Specs

Radius

3.07 R⊕

Radius (Jupiter)

0.274 R♃

Mass

9.65 M⊕

Mass (Jupiter)

0.030 M♃

Density

1.83 g/cm³

Surface Gravity

1.02 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.409

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

#454of 1978

top 22.9%

This planet

3.07R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

TOI-1180 b 3.07 R⊕ Kepler-346 c 3.07 R⊕ Kepler-293 b 3.07 R⊕

Metric	Earth	Kepler-1929 b	Jupiter
Radius (R⊕)	1.00	3.07	11.21
Mass (M⊕)	1.00	9.65	317.83
Density (g/cm³)	5.51	1.83	1.33
Surface Gravity (g)	1.00	1.02	2.53
Insolation (S⊕)	1.00	37.20	0.037

Star Catalogue Identifiers

TIC

TIC 269029175

Gaia DR2

Gaia DR2 2085651305945898368

Gaia DR3

Gaia DR3 2085651305945898368

System

Kepler-1929

Percentile among Sub-Neptune cohort

Radius 3.073 R⊕ · percentile 77 / cohort 1978

Mass 9.650 M⊕ · percentile 70 / cohort 1978

Orbital period 59.36 d · percentile 88 / cohort 1946

Distance 508.20 pc · percentile 47 / cohort 1975

ESI 0.409 · percentile 54 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

59.362 days

Semi-major axis

0.3088 AU

Eccentricity

0.000

Inclination

90.00 °

Year Length

A year here lasts approximately 59.36 Earth days (16.3% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.3088 AU.

Transit Fingerprint

Depth

0.023 %

Duration

14.040 h

Impact parameter b

0.001

Rp / R★

0.013889

Transit midpoint (BJD)

2,455,017.1499

Photometric dip

Transit produces a flux drop of 234 ppm lasting ≈ 14.04 h.

Extended Orbital Architecture

Planet / star radius ratio

0.013889

Semi-major axis / stellar radius

32.633

Impact parameter (b)

0.001

Transit mid-time (BJD)

2,455,017.1499

Angular separation (arcsec)

0.60800

Eq. Temperature

566K

(293 °C)

Insolation (S⊕)

37.20

Earth = 1.00

Earth Similarity (ESI)

0.409

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-1929

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,786 K — hotter than the Sun (5,778 K)

Estimated Age

6.92 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

1.471 R☉

Stellar Mass

1.006 M☉

Metallicity [Fe/H]

-0.02

Extended Stellar Properties

Surface gravity (log g)

4.106 dex

Stellar density

0.191 g/cm³

Metallicity ratio

[Fe/H]

Distance

508.20 parsec

Light-years 1,657.53 ly

V-band magnitude

11.79 mag

Voyager-speed travel 29,230,506 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.939 mas

Total Proper Motion

10.733 mas/yr

PM Right Ascension

-8.31 mas/yr

PM Declination

6.79 mas/yr

Galactic Cartesian (pc)

x = 0.334 · y = -0.588 · z = 0.737

Equatorial (J2000)

RA 299.58334° · Dec 47.44812°

Galactic ℓ, b

81.906° · 9.365°

Ecliptic λ, β

323.552° · 65.479°

HTM-20 index

1010049935