Key parameters at a glance

A radius of 3.60 Earth radii
A mass of 12.60 Earth masses
Surface gravity around 0.97 g
An orbital period of 48.324 days
Distance from Earth 1,907.61 light-years
Earth Similarity Index 0.577
Travel time at Voyager 1 speed 33,640,726 years

K2-196 b Planet Profile

Physical Specs

Radius

3.60 R⊕

Radius (Jupiter)

0.321 R♃

Mass

12.60 M⊕

Mass (Jupiter)

0.040 M♃

Density

1.48 g/cm³

Surface Gravity

0.97 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.577

HZ Position Unknown

Controversial No

Discovery

Year 2018

Method Transit

Facility K2

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#143of 1978

top 7.2%

This planet

3.60R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-148 c 3.60 R⊕ Kepler-119 b 3.60 R⊕ Kepler-305 b 3.60 R⊕

Metric	Earth	K2-196 b	Jupiter
Radius (R⊕)	1.00	3.60	11.21
Mass (M⊕)	1.00	12.60	317.83
Density (g/cm³)	5.51	1.48	1.33
Surface Gravity (g)	1.00	0.97	2.53
Insolation (S⊕)	1.00	—	0.037

Star Catalogue Identifiers

TIC

TIC 178954837

Gaia DR2

Gaia DR2 3625009164407557760

Gaia DR3

Gaia DR3 3625009164407557760

System

K2-196

Percentile among Sub-Neptune cohort

Radius 3.600 R⊕ · percentile 93 / cohort 1978

Mass 12.600 M⊕ · percentile 86 / cohort 1978

Orbital period 48.32 d · percentile 85 / cohort 1946

Distance 584.88 pc · percentile 52 / cohort 1975

ESI 0.577 · percentile 80 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

48.324 days

Semi-major axis

— AU

Eccentricity

—

Inclination

88.27 °

Year Length

A year here lasts approximately 48.32 Earth days (13.2% of a terrestrial year).

Transit Fingerprint

Rp / R★

0.021446

Transit midpoint (BJD)

2,457,227.8907

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.577

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Mayo et al. 2018

Instrument

Kepler CCD Array

Publication

2018-03

Observation locale

Space

Discovery cohort

Planets confirmed in 2018 at K2 (12 shown).

K2-190 c · Rocky Terrestrial K2-183 b · Rocky Terrestrial K2-209 b · Rocky Terrestrial K2-210 b · Rocky Terrestrial K2-165 b · Super-Earth K2-169 b · Super-Earth K2-148 b · Super-Earth K2-219 b · Super-Earth K2-190 b · Super-Earth K2-200 b · Super-Earth K2-201 b · Super-Earth K2-170 b · Super-Earth

Host System: K2-196

Spectral Class

F-type yellow-white

Effective Temperature

6,045 K — hotter than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

1.539 R☉

Stellar Mass

1.162 M☉

Metallicity [Fe/H]

0.01

Extended Stellar Properties

Surface gravity (log g)

4.080 dex

Stellar density

0.199 g/cm³

Systemic radial velocity

-28.27 km/s

Metallicity ratio

[Fe/H]

Distance

584.88 parsec

Light-years 1,907.61 ly

V-band magnitude

12.24 mag

Voyager-speed travel 33,640,726 yr

Multi-band Host Photometry — 12 bands

Astrometric Data

Parallax

1.683 mas

Total Proper Motion

14.482 mas/yr

PM Right Ascension

-14.48 mas/yr

PM Declination

-0.29 mas/yr

Galactic Cartesian (pc)

x = -0.927 · y = -0.346 · z = -0.147

Equatorial (J2000)

RA 200.45625° · Dec -8.47171°

Galactic ℓ, b

315.676° · 53.646°

Ecliptic λ, β

202.067° · 0.134°

HTM-20 index

-511785978