Key parameters at a glance

A radius of 2.31 Earth radii
A mass of 5.95 Earth masses
Surface gravity around 1.12 g
An orbital period of 19.567 days
Semi-major axis 0.1402 AU
Distance from Earth 1,232.29 light-years
Earth Similarity Index 0.732
Travel time at Voyager 1 speed 21,731,417 years

K2-74 b Planet Profile

Physical Specs

Radius

2.31 R⊕

Radius (Jupiter)

0.206 R♃

Mass

5.95 M⊕

Mass (Jupiter)

0.019 M♃

Density

2.65 g/cm³

Surface Gravity

1.12 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.732

HZ Position Inner

Controversial No

Discovery

Year 2016

Method Transit

Facility K2

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#1486of 1978

top 75.1%

This planet

2.31R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-926 b 2.31 R⊕ Kepler-244 d 2.31 R⊕ Kepler-981 b 2.31 R⊕

Metric	Earth	K2-74 b	Jupiter
Radius (R⊕)	1.00	2.31	11.21
Mass (M⊕)	1.00	5.95	317.83
Density (g/cm³)	5.51	2.65	1.33
Surface Gravity (g)	1.00	1.12	2.53
Insolation (S⊕)	1.00	59.10	0.037

Star Catalogue Identifiers

TIC

TIC 251018878

Gaia DR2

Gaia DR2 2609566053956741888

Gaia DR3

Gaia DR3 2609566053956741888

System

K2-74

Percentile among Sub-Neptune cohort

Radius 2.310 R⊕ · percentile 25 / cohort 1978

Mass 5.950 M⊕ · percentile 24 / cohort 1978

Orbital period 19.57 d · percentile 61 / cohort 1946

Distance 377.82 pc · percentile 40 / cohort 1975

ESI 0.732 · percentile 95 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

19.567 days

Semi-major axis

0.1402 AU

Eccentricity

—

Inclination

88.92 °

Year Length

A year here lasts approximately 19.57 Earth days (5.4% of a terrestrial year) at a mean orbital distance of 0.1402 AU.

Transit Fingerprint

Depth

0.082 %

Duration

5.120 h

Impact parameter b

0.150

Rp / R★

0.021500

Transit midpoint (BJD)

2,456,997.9992

Photometric dip

Transit produces a flux drop of 818 ppm lasting ≈ 5.12 h.

Extended Orbital Architecture

Planet / star radius ratio

0.021500

Semi-major axis / stellar radius

26.135

Impact parameter (b)

0.150

Transit mid-time (BJD)

2,456,997.9992

Angular separation (arcsec)

0.37100

Eq. Temperature

—

Insolation (S⊕)

59.10

Earth = 1.00

Earth Similarity (ESI)

0.732

0 = alien, 1 = Earth-identical

Discovery Paper

Primary reference

Crossfield et al. 2016

Instrument

Kepler CCD Array

Publication

2016-09

Observation locale

Space

Discovery cohort

Planets confirmed in 2016 at K2 (12 shown).

K2-72 d · Rocky Terrestrial K2-72 b · Rocky Terrestrial K2-91 b · Rocky Terrestrial K2-72 c · Rocky Terrestrial K2-102 b · Super-Earth K2-90 c · Super-Earth K2-72 e · Super-Earth K2-83 b · Rocky Terrestrial K2-88 b · Rocky Terrestrial K2-80 c · Super-Earth K2-83 c · Super-Earth K2-65 b · Super-Earth

Host System: K2-74

Spectral Class

F-type yellow-white

Effective Temperature

6,060 K — hotter than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.980 R☉

Stellar Mass

0.960 M☉

Metallicity [Fe/H]

-0.21

Extended Stellar Properties

Surface gravity (log g)

4.444 dex

Stellar density

1.470 g/cm³

Systemic radial velocity

28.65 km/s

Metallicity ratio

[Fe/H]

Distance

377.82 parsec

Light-years 1,232.29 ly

V-band magnitude

12.72 mag

Voyager-speed travel 21,731,417 yr

Multi-band Host Photometry — 17 bands

Astrometric Data

Parallax

2.619 mas

Total Proper Motion

18.203 mas/yr

PM Right Ascension

-12.53 mas/yr

PM Declination

-13.21 mas/yr

Galactic Cartesian (pc)

x = 0.928 · y = -0.339 · z = -0.152

Equatorial (J2000)

RA 339.91930° · Dec -8.71457°

Galactic ℓ, b

57.297° · -53.840°

Ecliptic λ, β

338.179° · -0.230°

HTM-20 index

-556489640