Key parameters at a glance

A radius of 18.00 Earth radii
An orbital period of 3.535 days
Semi-major axis 0.0540 AU
Equilibrium temperature 2,004 K (1731 °C)
Distance from Earth 3,386.84 light-years
Earth Similarity Index 0.011
Travel time at Voyager 1 speed 59,726,859 years

K2-52 b Planet Profile

Physical Specs

Radius

18.00 R⊕

Radius (Jupiter)

1.606 R♃

Mass

— M⊕

Mass (Jupiter)

— M♃

Density

— g/cm³

Surface Gravity

— g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.011

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

#74of 1771

top 4.1%

This planet

18.00R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

HATS-11 b 18.03 R⊕ OGLE2-TR-L9 b 18.05 R⊕ NGTS-31 b 18.05 R⊕

Metric	Earth	K2-52 b	Jupiter
Radius (R⊕)	1.00	18.00	11.21
Mass (M⊕)	1.00	—	317.83
Density (g/cm³)	5.51	—	1.33
Surface Gravity (g)	1.00	—	2.53
Insolation (S⊕)	1.00	1,124.00	0.037

Star Catalogue Identifiers

TIC

TIC 399155300

Gaia DR2

Gaia DR2 6049057713786919936

Gaia DR3

Gaia DR3 6049057713786919936

System

K2-52

Percentile among Gas Giant cohort

Radius 18.000 R⊕ · percentile 96 / cohort 1771

Orbital period 3.54 d · percentile 23 / cohort 1533

Distance 1,038.41 pc · percentile 86 / cohort 1759

ESI 0.011 · percentile 0 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

3.535 days

Semi-major axis

0.0540 AU

Eccentricity

—

Inclination

86.46 °

Year Length

A year here lasts approximately 3.54 Earth days (1.0% of a terrestrial year) at a mean orbital distance of 0.0540 AU.

Transit Fingerprint

Depth

0.631 %

Duration

5.328 h

Impact parameter b

0.320

Rp / R★

0.075000

Transit midpoint (BJD)

2,456,896.0262

Photometric dip

Transit produces a flux drop of 6,314 ppm lasting ≈ 5.33 h.

Extended Orbital Architecture

Planet / star radius ratio

0.075000

Semi-major axis / stellar radius

5.200

Impact parameter (b)

0.320

Transit mid-time (BJD)

2,456,896.0262

Angular separation (arcsec)

0.05200

Eq. Temperature

2,004K

(1731 °C)

Insolation (S⊕)

1,124.00

Earth = 1.00

Earth Similarity (ESI)

0.011

0 = alien, 1 = Earth-identical

Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.

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: K2-52

Spectral Class

F-type yellow-white

Effective Temperature

7,147 K — hotter than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

2.192 R☉

Stellar Mass

1.691 M☉

Metallicity [Fe/H]

0.06

Extended Stellar Properties

Surface gravity (log g)

3.979 dex

Stellar density

0.220 g/cm³

Metallicity ratio

[Fe/H]

Distance

1,038.41 parsec

Light-years 3,386.84 ly

V-band magnitude

15.93 mag

Voyager-speed travel 59,726,859 yr

Multi-band Host Photometry — 12 bands

Astrometric Data

Parallax

0.939 mas

Total Proper Motion

7.677 mas/yr

PM Right Ascension

7.63 mas/yr

PM Declination

0.80 mas/yr

Galactic Cartesian (pc)

x = -0.360 · y = -0.832 · z = -0.422

Equatorial (J2000)

RA 246.61142° · Dec -24.96995°

Galactic ℓ, b

352.627° · 16.532°

Ecliptic λ, β

248.869° · -3.230°

HTM-20 index

-702921346