Key parameters at a glance
- A radius of 3.26 Earth radii
- A mass of 10.70 Earth masses
- Surface gravity around 1.01 g
- An orbital period of 4.688 days
- Equilibrium temperature 908 K (635 °C)
- Distance from Earth 658.37 light-years
- Earth Similarity Index 0.250
- Travel time at Voyager 1 speed 11,610,274 years
- Almost certainly tidally locked to its host star given the close orbit
1 sibling around K2-348
K2-348 b 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 |
|---|---|---|---|---|---|---|
| K2-348 b this | Sub-Neptune | 3.26 | 10.70 | 4.688 | 908 | 2021 |
| K2-348 c | Sub-Neptune | 2.67 | 7.61 | 12.550 | 655 | 2021 |
K2-348 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#305of 1978
top 15.4%
This planet
3.26R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | K2-348 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 3.26 | 11.21 |
| Mass (M⊕) | 1.00 | 10.70 | 317.83 |
| Density (g/cm³) | 5.51 | 1.70 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.01 | 2.53 |
| Insolation (S⊕) | 1.00 | 133.08 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 117275513
Gaia DR2
Gaia DR2 690310993768911104
Gaia DR3
Gaia DR3 690310993768911104
System
K2-348
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 4.69 Earth days (1.3% of a terrestrial year).
Transit Fingerprint
Depth
0.147 %
Duration
2.750 h
Impact parameter b
0.390
Rp / R★
0.035000
Transit midpoint (BJD)
2,458,096.7168
Photometric dip
Transit produces a flux drop of 1,469 ppm lasting ≈ 2.75 h.
Extended Orbital Architecture
Planet / star radius ratio
0.035000
Semi-major axis / stellar radius
12.550
Impact parameter (b)
0.390
Transit mid-time (BJD)
2,458,096.7168
Eq. Temperature
908K
(635 °C)
Insolation (S⊕)
133.08
Earth = 1.00
Earth Similarity (ESI)
0.250
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — 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: K2-348
Spectral Class
K-type orange
Effective Temperature
5,077 K — cooler than the Sun (5,778 K)
Estimated Age
—
Stellar Radius
0.850 R☉
Stellar Mass
0.830 M☉
Metallicity [Fe/H]
0.13
Extended Stellar Properties
Surface gravity (log g)
4.500 dex
Stellar density
1.759 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 17 bands
Astrometric Data
Parallax
4.925 mas
Total Proper Motion
34.614 mas/yr
PM Right Ascension
1.18 mas/yr
PM Declination
-34.59 mas/yr
Galactic Cartesian (pc)
x = -0.596 · y = 0.688 · z = 0.413
Equatorial (J2000)
RA 130.87835° · Dec 24.42296°
Galactic ℓ, b
200.789° · 34.695°
Ecliptic λ, β
126.811° · 6.056°
HTM-20 index
-502300985
Similar Worlds
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TOI-2076 d
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HD 20781 d
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TOI-5803 b
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