Key parameters at a glance
- A radius of 2.02 Earth radii
- A mass of 4.74 Earth masses
- Surface gravity around 1.16 g
- An orbital period of 7.677 days
- Equilibrium temperature 465 K (192 °C)
- Distance from Earth 541.97 light-years
- Earth Similarity Index 0.572
- Travel time at Voyager 1 speed 9,557,643 years
- Almost certainly tidally locked to its host star given the close orbit
1 sibling around K2-343
K2-343 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 |
|---|---|---|---|---|---|---|
| K2-343 b | Super-Earth | 1.65 | 3.36 | 2.787 | 653 | 2021 |
| K2-343 c this | Sub-Neptune | 2.02 | 4.74 | 7.677 | 465 | 2021 |
K2-343 c Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1927of 1978
top 97.4%
This planet
2.02R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | K2-343 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.02 | 11.21 |
| Mass (M⊕) | 1.00 | 4.74 | 317.83 |
| Density (g/cm³) | 5.51 | 3.16 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.16 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Star Catalogue Identifiers
TIC
TIC 197246627
Gaia DR2
Gaia DR2 685818492336147072
Gaia DR3
Gaia DR3 685818492336147072
System
K2-343
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 7.68 Earth days (2.1% of a terrestrial year).
Transit Fingerprint
Depth
0.207 %
Duration
2.200 h
Impact parameter b
0.360
Rp / R★
0.040200
Transit midpoint (BJD)
2,457,144.6246
Photometric dip
Transit produces a flux drop of 2,074 ppm lasting ≈ 2.20 h.
Extended Orbital Architecture
Planet / star radius ratio
0.040200
Semi-major axis / stellar radius
26.110
Impact parameter (b)
0.360
Transit mid-time (BJD)
2,457,144.6246
Eq. Temperature
465K
(192 °C)
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.572
0 = alien, 1 = Earth-identical
Insufficient insolation data — the surface is too hot to retain surface water. Close-orbiting tidally-locked around a cool host.
Discovery Paper
Primary reference
De Leon et al. 2021Instrument
Kepler CCD Array
Publication
2021-08
Observation locale
Space
Discovery cohort
Planets confirmed in 2021 at K2 (12 shown).
Host System: K2-343
Spectral Class
K-type orange
Effective Temperature
3,804 K — cooler than the Sun (5,778 K)
Estimated Age
—
Stellar Radius
0.460 R☉
Stellar Mass
0.490 M☉
Metallicity [Fe/H]
-0.10
Extended Stellar Properties
Surface gravity (log g)
4.800 dex
Stellar density
6.028 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 17 bands
Astrometric Data
Parallax
5.989 mas
Total Proper Motion
11.425 mas/yr
PM Right Ascension
-10.90 mas/yr
PM Declination
3.41 mas/yr
Galactic Cartesian (pc)
x = -0.649 · y = 0.667 · z = 0.367
Equatorial (J2000)
RA 134.20217° · Dec 21.50269°
Galactic ℓ, b
205.366° · 36.716°
Ecliptic λ, β
130.561° · 4.071°
HTM-20 index
-328742775
Similar Worlds
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Radius 2.03 R⊕ · 2,214.9 ly