Key parameters at a glance

A radius of 3.41 Earth radii
A mass of 11.50 Earth masses
Surface gravity around 0.99 g
An orbital period of 73.750 days
Semi-major axis 0.3873 AU
Equilibrium temperature 677 K (404 °C)
Distance from Earth 3,558.36 light-years
Earth Similarity Index 0.330
Travel time at Voyager 1 speed 62,751,710 years

Kepler-1927 b Planet Profile

Physical Specs

Radius

3.41 R⊕

Radius (Jupiter)

0.304 R♃

Mass

11.50 M⊕

Mass (Jupiter)

0.036 M♃

Density

1.60 g/cm³

Surface Gravity

0.99 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.330

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

#220of 1978

top 11.1%

This planet

3.41R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

TOI-1806.01 3.41 R⊕ Kepler-159 c 3.41 R⊕ Kepler-711 b 3.41 R⊕

Metric	Earth	Kepler-1927 b	Jupiter
Radius (R⊕)	1.00	3.41	11.21
Mass (M⊕)	1.00	11.50	317.83
Density (g/cm³)	5.51	1.60	1.33
Surface Gravity (g)	1.00	0.99	2.53
Insolation (S⊕)	1.00	34.70	0.037

Star Catalogue Identifiers

TIC

TIC 184427149

Gaia DR2

Gaia DR2 2076827454560320768

Gaia DR3

Gaia DR3 2076827454560320768

System

Kepler-1927

Percentile among Sub-Neptune cohort

Radius 3.406 R⊕ · percentile 89 / cohort 1978

Mass 11.500 M⊕ · percentile 83 / cohort 1978

Orbital period 73.75 d · percentile 91 / cohort 1946

Distance 1,091.00 pc · percentile 83 / cohort 1975

ESI 0.330 · percentile 35 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

73.750 days

Semi-major axis

0.3873 AU

Eccentricity

0.000

Inclination

89.83 °

Year Length

A year here lasts approximately 73.75 Earth days (20.2% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.3873 AU.

Transit Fingerprint

Depth

0.023 %

Duration

13.234 h

Impact parameter b

0.127

Rp / R★

0.013898

Transit midpoint (BJD)

2,455,021.5189

Photometric dip

Transit produces a flux drop of 230 ppm lasting ≈ 13.23 h.

Extended Orbital Architecture

Planet / star radius ratio

0.013898

Semi-major axis / stellar radius

43.099

Impact parameter (b)

0.127

Transit mid-time (BJD)

2,455,021.5189

Angular separation (arcsec)

0.35500

Eq. Temperature

677K

(404 °C)

Insolation (S⊕)

34.70

Earth = 1.00

Earth Similarity (ESI)

0.330

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-1927

Spectral Class

F-type yellow-white

Effective Temperature

6,056 K — hotter than the Sun (5,778 K)

Estimated Age

2.88 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

2.481 R☉

Stellar Mass

1.408 M☉

Metallicity [Fe/H]

0.14

Extended Stellar Properties

Surface gravity (log g)

3.797 dex

Stellar density

0.269 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,091.00 parsec

Light-years 3,558.36 ly

V-band magnitude

13.31 mag

Voyager-speed travel 62,751,710 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.888 mas

Total Proper Motion

2.309 mas/yr

PM Right Ascension

2.28 mas/yr

PM Declination

0.36 mas/yr

Galactic Cartesian (pc)

x = 0.333 · y = -0.673 · z = 0.660

Equatorial (J2000)

RA 296.35461° · Dec 41.33557°

Galactic ℓ, b

75.375° · 8.350°

Ecliptic λ, β

313.227° · 60.879°

HTM-20 index

-1575213718