Key parameters at a glance

A radius of 1.58 Earth radii
A mass of 3.12 Earth masses
Surface gravity around 1.25 g
An orbital period of 0.674 days
Distance from Earth 896.49 light-years
Earth Similarity Index 0.873
Travel time at Voyager 1 speed 15,809,520 years

1 sibling around K2-396

K2-396 b shares its host star with 1 other confirmed planet. Side-by-side measurements below.

Planet	Type	Radius (R⊕)	Mass (M⊕)	Period (d)	Eq. T (K)	Year
K2-396 b this	Super-Earth	1.58	3.12	0.674	—	2022
K2-396 c	Sub-Neptune	3.12	9.93	25.761	—	2022

K2-396 b Planet Profile

Physical Specs

Radius

1.58 R⊕

Radius (Jupiter)

0.141 R♃

Mass

3.12 M⊕

Mass (Jupiter)

0.010 M♃

Density

4.35 g/cm³

Surface Gravity

1.25 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.873

HZ Position Unknown

Controversial No

Discovery

Year 2022

Method Transit

Facility K2

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#614of 1176

top 52.1%

This planet

1.58R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

K2-191 b 1.58 R⊕ Kepler-386 c 1.58 R⊕ Kepler-445 b 1.58 R⊕

Metric	Earth	K2-396 b	Jupiter
Radius (R⊕)	1.00	1.58	11.21
Mass (M⊕)	1.00	3.12	317.83
Density (g/cm³)	5.51	4.35	1.33
Surface Gravity (g)	1.00	1.25	2.53
Insolation (S⊕)	1.00	—	0.037

Star Catalogue Identifiers

TIC

TIC 59088823

Gaia DR2

Gaia DR2 3405720400701167104

Gaia DR3

Gaia DR3 3405720400701167104

System

K2-396

Percentile among Super-Earth cohort

Radius 1.579 R⊕ · percentile 48 / cohort 1176

Mass 3.120 M⊕ · percentile 44 / cohort 1176

Orbital period 0.67 d · percentile 2 / cohort 1164

Distance 274.86 pc · percentile 30 / cohort 1171

ESI 0.873 · percentile 95 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

0.674 days

Semi-major axis

— AU

Eccentricity

—

Inclination

— °

Year Length

A year here lasts roughly 16.2 hours long.

Transit Fingerprint

Duration

1.600 h

Impact parameter b

0.266

Rp / R★

0.015700

Transit midpoint (BJD)

2,457,820.9636

Extended Orbital Architecture

Planet / star radius ratio

0.015700

Semi-major axis / stellar radius

3.290

Impact parameter (b)

0.266

Transit mid-time (BJD)

2,457,820.9636

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.873

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Christiansen et al. 2022

Instrument

Kepler CCD Array

Publication

2022-03

Observation locale

Space

Discovery cohort

Planets confirmed in 2022 at K2 (12 shown).

K2-411 b · Rocky Terrestrial K2-381 b · Rocky Terrestrial K2-384 b · Rocky Terrestrial K2-400 b · Rocky Terrestrial K2-384 c · Rocky Terrestrial K2-369 b · Super-Earth K2-407 b · Super-Earth K2-414 b · Rocky Terrestrial K2-368 b · Super-Earth K2-413 c · Rocky Terrestrial K2-384 e · Super-Earth K2-407 c · Super-Earth

Host System: K2-396

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,236 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.920 R☉

Stellar Mass

0.954 M☉

Metallicity [Fe/H]

0.24

Extended Stellar Properties

Surface gravity (log g)

4.488 dex

Stellar density

1.376 g/cm³

Metallicity ratio

[Fe/H]

Distance

274.86 parsec

Light-years 896.49 ly

V-band magnitude

13.32 mag

Voyager-speed travel 15,809,520 yr

Multi-band Host Photometry — 12 bands

Astrometric Data

Parallax

3.610 mas

Total Proper Motion

39.723 mas/yr

PM Right Ascension

-0.19 mas/yr

PM Declination

-39.72 mas/yr

Galactic Cartesian (pc)

x = 0.252 · y = 0.921 · z = 0.297

Equatorial (J2000)

RA 74.69286° · Dec 17.26906°

Galactic ℓ, b

183.771° · -15.415°

Ecliptic λ, β

75.328° · -5.394°

HTM-20 index

-1631104290