Key parameters at a glance

A radius of 2.77 Earth radii
A mass of 8.10 Earth masses
Surface gravity around 1.06 g
An orbital period of 18.311 days
Semi-major axis 0.1429 AU
Distance from Earth 1,832.77 light-years
Earth Similarity Index 0.667
Travel time at Voyager 1 speed 32,320,869 years

1 sibling around K2-75

K2-75 c 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
K2-75 b	Sub-Neptune	2.67	7.61	7.814	—	2016
K2-75 c this	Sub-Neptune	2.77	8.10	18.311	—	2016

K2-75 c Planet Profile

Physical Specs

Radius

2.77 R⊕

Radius (Jupiter)

0.247 R♃

Mass

8.10 M⊕

Mass (Jupiter)

0.026 M♃

Density

2.09 g/cm³

Surface Gravity

1.06 g (Earth)

Classification

Planet Type

Sub-Neptune

ESI Score 0.667

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

#780of 1978

top 39.4%

This planet

2.77R⊕

Sub-Neptune median

2.71R⊕

Nearest-size peers

Kepler-251 c 2.77 R⊕ Kepler-251 d 2.77 R⊕ TOI-444 b 2.77 R⊕

Metric	Earth	K2-75 c	Jupiter
Radius (R⊕)	1.00	2.77	11.21
Mass (M⊕)	1.00	8.10	317.83
Density (g/cm³)	5.51	2.09	1.33
Surface Gravity (g)	1.00	1.06	2.53
Insolation (S⊕)	1.00	138.00	0.037

Star Catalogue Identifiers

TIC

TIC 250996363

Gaia DR2

Gaia DR2 2621784209417087360

Gaia DR3

Gaia DR3 2621784209417087360

System

K2-75

Percentile among Sub-Neptune cohort

Radius 2.770 R⊕ · percentile 60 / cohort 1978

Mass 8.100 M⊕ · percentile 55 / cohort 1978

Orbital period 18.31 d · percentile 59 / cohort 1946

Distance 561.93 pc · percentile 50 / cohort 1975

ESI 0.667 · percentile 90 / cohort 1978

Orbit & Habitability

Orbital Dynamics

Period

18.311 days

Semi-major axis

0.1429 AU

Eccentricity

—

Inclination

88.80 °

Year Length

A year here lasts approximately 18.31 Earth days (5.0% of a terrestrial year) at a mean orbital distance of 0.1429 AU.

Transit Fingerprint

Depth

0.041 %

Duration

6.420 h

Impact parameter b

0.590

Rp / R★

0.016200

Transit midpoint (BJD)

2,456,992.7150

Photometric dip

Transit produces a flux drop of 410 ppm lasting ≈ 6.42 h.

Extended Orbital Architecture

Planet / star radius ratio

0.016200

Semi-major axis / stellar radius

21.419

Impact parameter (b)

0.590

Transit mid-time (BJD)

2,456,992.7150

Angular separation (arcsec)

0.25400

Eq. Temperature

—

Insolation (S⊕)

138.00

Earth = 1.00

Earth Similarity (ESI)

0.667

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: K2-75

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,995 K — hotter than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

1.560 R☉

Stellar Mass

1.160 M☉

Metallicity [Fe/H]

0.30

Extended Stellar Properties

Surface gravity (log g)

4.118 dex

Stellar density

0.455 g/cm³

Systemic radial velocity

4.37 km/s

Metallicity ratio

[Fe/H]

Distance

561.93 parsec

Light-years 1,832.77 ly

V-band magnitude

12.80 mag

Voyager-speed travel 32,320,869 yr

Multi-band Host Photometry — 17 bands

Astrometric Data

Parallax

1.752 mas

Total Proper Motion

13.685 mas/yr

PM Right Ascension

10.24 mas/yr

PM Declination

-9.08 mas/yr

Galactic Cartesian (pc)

x = 0.925 · y = -0.358 · z = -0.130

Equatorial (J2000)

RA 338.84490° · Dec -7.46990°

Galactic ℓ, b

57.967° · -52.253°

Ecliptic λ, β

337.655° · 1.321°

HTM-20 index

-1792863634