Key parameters at a glance

A radius of 3.96 Earth radii
A mass of 14.90 Earth masses
Surface gravity around 0.95 g
An orbital period of 28.227 days
Semi-major axis 0.1778 AU
Equilibrium temperature 565 K (292 °C)
Distance from Earth 4,991.17 light-years
Earth Similarity Index 0.368
Travel time at Voyager 1 speed 88,019,195 years

Kepler-1405 b Planet Profile

Physical Specs

Radius

3.96 R⊕

Radius (Jupiter)

0.353 R♃

Mass

14.90 M⊕

Mass (Jupiter)

0.047 M♃

Density

1.32 g/cm³

Surface Gravity

0.95 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.368

HZ Position Inner

Controversial No

Discovery

Year 2016

Method Transit

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#4of 1978

top 0.2%

This planet

3.96R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-149 d 3.96 R⊕ Kepler-976 b 3.96 R⊕ Kepler-278 b 3.96 R⊕

Metric	Earth	Kepler-1405 b	Jupiter
Radius (R⊕)	1.00	3.96	11.21
Mass (M⊕)	1.00	14.90	317.83
Density (g/cm³)	5.51	1.32	1.33
Surface Gravity (g)	1.00	0.95	2.53
Insolation (S⊕)	1.00	33.80	0.037

Star Catalogue Identifiers

TIC

TIC 184166357

Gaia DR2

Gaia DR2 2076198190312168576

Gaia DR3

Gaia DR3 2076198190312168576

System

Kepler-1405

Percentile among Sub-Neptune cohort

Radius 3.960 R⊕ · percentile 100 / cohort 1978

Mass 14.900 M⊕ · percentile 93 / cohort 1978

Orbital period 28.23 d · percentile 72 / cohort 1946

Distance 1,530.30 pc · percentile 94 / cohort 1975

ESI 0.368 · percentile 45 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

28.227 days

Semi-major axis

0.1778 AU

Eccentricity

0.000

Inclination

89.96 °

Year Length

A year here lasts approximately 28.23 Earth days (7.7% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1778 AU.

Transit Fingerprint

Depth

0.111 %

Duration

5.648 h

Impact parameter b

0.025

Rp / R★

0.033507

Transit midpoint (BJD)

2,454,974.4935

Photometric dip

Transit produces a flux drop of 1,113 ppm lasting ≈ 5.65 h.

Extended Orbital Architecture

Planet / star radius ratio

0.033507

Semi-major axis / stellar radius

38.420

Impact parameter (b)

0.025

Transit mid-time (BJD)

2,454,974.4935

Angular separation (arcsec)

0.11600

Eq. Temperature

565K

(292 °C)

Insolation (S⊕)

33.80

Earth = 1.00

Earth Similarity (ESI)

0.368

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

Morton et al. 2016

Instrument

Kepler CCD Array

Publication

2016-05

Observation locale

Space

Discovery cohort

Planets confirmed in 2016 at Kepler (12 shown).

Kepler-1512 b · Rocky Terrestrial Kepler-1410 b · Super-Earth Kepler-560 b · Super-Earth Kepler-1389 b · Super-Earth Kepler-1450 b · Super-Earth Kepler-1544 b · Super-Earth Kepler-1459 b · Super-Earth Kepler-1638 b · Super-Earth Kepler-737 b · Super-Earth Kepler-1185 b · Super-Earth Kepler-1178 b · Rocky Terrestrial Kepler-1040 b · Sub-Neptune

Host System: Kepler-1405

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,925 K — hotter than the Sun (5,778 K)

Estimated Age

3.63 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.070 R☉

Stellar Mass

1.050 M☉

Metallicity [Fe/H]

0.03

Extended Stellar Properties

Surface gravity (log g)

4.400 dex

Stellar density

1.347 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,530.30 parsec

Light-years 4,991.17 ly

V-band magnitude

16.03 mag

Voyager-speed travel 88,019,195 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.627 mas

Total Proper Motion

3.732 mas/yr

PM Right Ascension

3.44 mas/yr

PM Declination

-1.44 mas/yr

Galactic Cartesian (pc)

x = 0.336 · y = -0.698 · z = 0.633

Equatorial (J2000)

RA 295.68488° · Dec 39.25613°

Galactic ℓ, b

73.287° · 7.791°

Ecliptic λ, β

310.817° · 59.109°

HTM-20 index

-1140259957