Key parameters at a glance

A radius of 1.21 Earth radii
A mass of 2.10 Earth masses
Surface gravity around 1.43 g
An orbital period of 4.349 days
Semi-major axis 0.0490 AU
Equilibrium temperature 1,066 K (793 °C)
Distance from Earth 514.29 light-years
Earth Similarity Index 0.286
Travel time at Voyager 1 speed 9,069,491 years

3 siblings around K2-32

K2-32 e shares its host star with 3 other confirmed planets. Side-by-side measurements below.

Planet	Type	Radius (R⊕)	Mass (M⊕)	Period (d)	Eq. T (K)	Year
K2-32 e this	Rocky Terrestrial	1.21	2.10	4.349	1,066	2019
K2-32 b	Neptune-like	5.30	15.00	8.992	837	2016
K2-32 c	Sub-Neptune	3.13	8.10	20.661	634	2016
K2-32 d	Sub-Neptune	3.48	6.70	31.717	550	2016

K2-32 e Planet Profile

Physical Specs

Radius

1.21 R⊕

Radius (Jupiter)

0.108 R♃

Mass

2.10 M⊕

Mass (Jupiter)

0.007 M♃

Density

6.30 g/cm³

Surface Gravity

1.43 g (Earth)

Classification

Planet Type

Rocky Terrestrial

ESI Score 0.286

HZ Position Unknown

Controversial No

Discovery

Year 2019

Method Transit

Facility K2

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#54of 570

top 9.3%

This planet

1.21R⊕

Rocky Terrestrial median

1.01R⊕

Nearest-size peers

LP 791-18 b 1.21 R⊕ Kepler-415 b 1.21 R⊕ Kepler-169 c 1.21 R⊕

Metric	Earth	K2-32 e	Jupiter
Radius (R⊕)	1.00	1.21	11.21
Mass (M⊕)	1.00	2.10	317.83
Density (g/cm³)	5.51	6.30	1.33
Surface Gravity (g)	1.00	1.43	2.53
Insolation (S⊕)	1.00	—	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	2.100 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 437444661

Gaia DR2

Gaia DR2 4130539180358512768

Gaia DR3

Gaia DR3 4130539180358512768

System

K2-32

Percentile among Rocky Terrestrial cohort

Radius 1.212 R⊕ · percentile 90 / cohort 570

Mass 2.100 M⊕ · percentile 91 / cohort 570

Orbital period 4.35 d · percentile 48 / cohort 567

Distance 157.68 pc · percentile 28 / cohort 566

ESI 0.286 · percentile 34 / cohort 570

Orbit & Habitability

Orbital Dynamics

Period

4.349 days

Semi-major axis

0.0490 AU

Eccentricity

0.043

Inclination

89.00 °

Year Length

A year here lasts approximately 4.35 Earth days (1.2% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0490 AU.

Transit Fingerprint

Depth

0.026 %

Duration

2.671 h

Impact parameter b

0.220

Rp / R★

0.012940

Transit midpoint (BJD)

2,456,898.8786

Photometric dip

Transit produces a flux drop of 255 ppm lasting ≈ 2.67 h.

Extended Orbital Architecture

Planet / star radius ratio

0.012940

Semi-major axis / stellar radius

12.240

Impact parameter (b)

0.220

RV semi-amplitude (K)

0.920 m/s

Transit mid-time (BJD)

2,456,898.8786

Long. of periastron (ω)

205.00°

Angular separation (arcsec)

0.31100

Eq. Temperature

1,066K

(793 °C)

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.286

0 = alien, 1 = Earth-identical

Insufficient insolation data — the dayside is scorched.

Detection Signatures

Transit photometry

A transit dip has been observed from at least one telescope.

Radial velocity

Stellar wobble has been measured spectroscopically.

Discovery Paper

Primary reference

Heller et al. 2019

Instrument

Kepler CCD Array

Publication

2019-05

Observation locale

Space

Discovery cohort

Planets confirmed in 2019 at K2 (12 shown).

EPIC 206032309 b · Rocky Terrestrial EPIC 201833600 c · Rocky Terrestrial EPIC 206215704 b · Rocky Terrestrial EPIC 201754305 d · Rocky Terrestrial EPIC 201841433 b · Rocky Terrestrial EPIC 206317286 b · Rocky Terrestrial EPIC 201615463 c · Rocky Terrestrial EPIC 212499991 b · Super-Earth EPIC 220554210 c · Super-Earth EPIC 201497682 b · Rocky Terrestrial K2-133 e · Super-Earth EPIC 206024342 b · Super-Earth

Host System: K2-32

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,271 K — cooler than the Sun (5,778 K)

Estimated Age

7.90 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

0.860 R☉

Stellar Mass

0.830 M☉

Metallicity [Fe/H]

-0.06

Extended Stellar Properties

Surface gravity (log g)

4.490 dex

Stellar density

1.833 g/cm³

Systemic radial velocity

-2.20 km/s

Rotational v·sin i

0.70 km/s

Activity index (log R'HK)

-5.061

Metallicity ratio

[Fe/H]

Distance

157.68 parsec

Light-years 514.29 ly

V-band magnitude

12.30 mag

Voyager-speed travel 9,069,491 yr

Multi-band Host Photometry — 12 bands

Astrometric Data

Parallax

6.314 mas

Total Proper Motion

56.149 mas/yr

PM Right Ascension

-16.60 mas/yr

PM Declination

-53.64 mas/yr

Galactic Cartesian (pc)

x = -0.285 · y = -0.898 · z = -0.335

Equatorial (J2000)

RA 252.42601° · Dec -19.54305°

Galactic ℓ, b

0.546° · 15.802°

Ecliptic λ, β

253.443° · 2.892°

HTM-20 index

1677871432