Key parameters at a glance

A radius of 1.49 Earth radii
A mass of 2.83 Earth masses
Surface gravity around 1.27 g
An orbital period of 5.329 days
Distance from Earth 806.59 light-years
Earth Similarity Index 0.894
Travel time at Voyager 1 speed 14,224,219 years

K2-176 b Planet Profile

Physical Specs

Radius

1.49 R⊕

Radius (Jupiter)

0.133 R♃

Mass

2.83 M⊕

Mass (Jupiter)

0.009 M♃

Density

4.69 g/cm³

Surface Gravity

1.27 g (Earth)

Classification

Planet Type

Super-Earth

ESI Score 0.894

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

#765of 1176

top 65.0%

This planet

1.49R⊕

Super-Earth median

1.60R⊕

Nearest-size peers

Kepler-174 c 1.49 R⊕ TOI-431 c 1.49 R⊕ Kepler-400 c 1.49 R⊕

Metric	Earth	K2-176 b	Jupiter
Radius (R⊕)	1.00	1.49	11.21
Mass (M⊕)	1.00	2.83	317.83
Density (g/cm³)	5.51	4.69	1.33
Surface Gravity (g)	1.00	1.27	2.53
Insolation (S⊕)	1.00	—	0.037

Star Catalogue Identifiers

TIC

TIC 440724456

Gaia DR2

Gaia DR2 49842515651843200

Gaia DR3

Gaia DR3 49842515651843200

System

K2-176

Percentile among Super-Earth cohort

Radius 1.491 R⊕ · percentile 35 / cohort 1176

Mass 2.830 M⊕ · percentile 32 / cohort 1176

Orbital period 5.33 d · percentile 42 / cohort 1164

Distance 247.30 pc · percentile 27 / cohort 1171

ESI 0.894 · percentile 97 / cohort 1176

Orbit & Habitability

Orbital Dynamics

Period

5.329 days

Semi-major axis

— AU

Eccentricity

—

Inclination

88.06 °

Year Length

A year here lasts approximately 5.33 Earth days (1.5% of a terrestrial year).

Transit Fingerprint

Depth

0.026 %

Duration

2.760 h

Rp / R★

0.015817

Transit midpoint (BJD)

2,457,066.7859

Photometric dip

Transit produces a flux drop of 260 ppm lasting ≈ 2.76 h.

Eq. Temperature

—

Insolation (S⊕)

—

Earth = 1.00

Earth Similarity (ESI)

0.894

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: K2-176

Spectral Class

G-type yellow (Sun-like)

Effective Temperature

5,428 K — cooler than the Sun (5,778 K)

Estimated Age

—

Stellar Radius

0.864 R☉

Stellar Mass

0.939 M☉

Metallicity [Fe/H]

0.15

Extended Stellar Properties

Surface gravity (log g)

4.630 dex

Stellar density

1.283 g/cm³

Systemic radial velocity

-27.30 km/s

Metallicity ratio

[Fe/H]

Distance

247.30 parsec

Light-years 806.59 ly

V-band magnitude

12.91 mag

Voyager-speed travel 14,224,219 yr

Multi-band Host Photometry — 12 bands

Astrometric Data

Parallax

4.016 mas

Total Proper Motion

30.894 mas/yr

PM Right Ascension

4.19 mas/yr

PM Declination

-30.61 mas/yr

Galactic Cartesian (pc)

x = 0.500 · y = 0.809 · z = 0.307

Equatorial (J2000)

RA 58.26918° · Dec 17.90695°

Galactic ℓ, b

172.457° · -27.022°

Ecliptic λ, β

59.940° · -2.283°

HTM-20 index

-2139181132