Key parameters at a glance

A radius of 2.02 Earth radii
A mass of 4.74 Earth masses
Surface gravity around 1.16 g
An orbital period of 18.605 days
Semi-major axis 0.1499 AU
Equilibrium temperature 833 K (560 °C)
Distance from Earth 8,042.49 light-years
Earth Similarity Index 0.328
Travel time at Voyager 1 speed 141,829,217 years

Kepler-1422 b Planet Profile

Physical Specs

Radius

2.02 R⊕

Radius (Jupiter)

0.180 R♃

Mass

4.74 M⊕

Mass (Jupiter)

0.015 M♃

Density

3.16 g/cm³

Surface Gravity

1.16 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.328

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

#1927of 1978

top 97.4%

This planet

2.02R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

DMPP-1 d 2.02 R⊕ Kepler-343 c 2.02 R⊕ Kepler-833 b 2.02 R⊕

Metric	Earth	Kepler-1422 b	Jupiter
Radius (R⊕)	1.00	2.02	11.21
Mass (M⊕)	1.00	4.74	317.83
Density (g/cm³)	5.51	3.16	1.33
Surface Gravity (g)	1.00	1.16	2.53
Insolation (S⊕)	1.00	156.90	0.037

Star Catalogue Identifiers

TIC

TIC 27009720

Gaia DR2

Gaia DR2 2128941660008727168

Gaia DR3

Gaia DR3 2128941660008727168

System

Kepler-1422

Percentile among Sub-Neptune cohort

Radius 2.020 R⊕ · percentile 2 / cohort 1978

Mass 4.740 M⊕ · percentile 4 / cohort 1978

Orbital period 18.61 d · percentile 59 / cohort 1946

Distance 2,465.84 pc · percentile 98 / cohort 1975

ESI 0.328 · percentile 34 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

18.605 days

Semi-major axis

0.1499 AU

Eccentricity

0.000

Inclination

89.75 °

Year Length

A year here lasts approximately 18.61 Earth days (5.1% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1499 AU.

Transit Fingerprint

Depth

0.024 %

Duration

7.180 h

Impact parameter b

0.093

Rp / R★

0.014910

Transit midpoint (BJD)

2,454,982.0326

Photometric dip

Transit produces a flux drop of 243 ppm lasting ≈ 7.18 h.

Extended Orbital Architecture

Planet / star radius ratio

0.014910

Semi-major axis / stellar radius

21.030

Impact parameter (b)

0.093

Transit mid-time (BJD)

2,454,982.0326

Angular separation (arcsec)

0.06080

Eq. Temperature

833K

(560 °C)

Insolation (S⊕)

156.90

Earth = 1.00

Earth Similarity (ESI)

0.328

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-1422

Spectral Class

F-type yellow-white

Effective Temperature

6,194 K — hotter than the Sun (5,778 K)

Estimated Age

3.02 Gyr — younger than the Sun (4.6 Gyr)

Stellar Radius

1.230 R☉

Stellar Mass

1.150 M☉

Metallicity [Fe/H]

0.00

Extended Stellar Properties

Surface gravity (log g)

4.320 dex

Stellar density

0.438 g/cm³

Metallicity ratio

[Fe/H]

Distance

2,465.84 parsec

Light-years 8,042.49 ly

V-band magnitude

15.74 mag

Voyager-speed travel 141,829,217 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

0.375 mas

Total Proper Motion

2.015 mas/yr

PM Right Ascension

1.95 mas/yr

PM Declination

0.49 mas/yr

Galactic Cartesian (pc)

x = 0.269 · y = -0.608 · z = 0.747

Equatorial (J2000)

RA 293.89022° · Dec 48.33609°

Galactic ℓ, b

80.862° · 13.147°

Ecliptic λ, β

315.940° · 68.000°

HTM-20 index

-1846404638