Key parameters at a glance
- A radius of 1.33 Earth radii
- A mass of 2.33 Earth masses
- Surface gravity around 1.32 g
- An orbital period of 6.131 days
- Equilibrium temperature 801 K (528 °C)
- Distance from Earth 1,069.08 light-years
- Earth Similarity Index 0.391
- Travel time at Voyager 1 speed 18,853,294 years
- Almost certainly tidally locked to its host star given the close orbit
4 siblings around K2-268
K2-268 e shares its host star with 4 other confirmed planets. Side-by-side measurements below.
K2-268 e Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#1022of 1176
top 86.8%
This planet
1.33R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | K2-268 e | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.33 | 11.21 |
| Mass (M⊕) | 1.00 | 2.33 | 317.83 |
| Density (g/cm³) | 5.51 | 5.44 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.32 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Star Catalogue Identifiers
TIC
TIC 444037742
Gaia DR2
Gaia DR2 604743013163971072
Gaia DR3
Gaia DR3 604743013163971072
System
K2-268
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 6.13 Earth days (1.7% of a terrestrial year).
Transit Fingerprint
Depth
0.044 %
Duration
2.540 h
Impact parameter b
0.420
Rp / R★
0.015500
Transit midpoint (BJD)
2,457,142.3440
Photometric dip
Transit produces a flux drop of 436 ppm lasting ≈ 2.54 h.
Extended Orbital Architecture
Planet / star radius ratio
0.015500
Semi-major axis / stellar radius
16.930
Impact parameter (b)
0.420
Transit mid-time (BJD)
2,457,142.3440
Eq. Temperature
801K
(528 °C)
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.391
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: K2-268
Spectral Class
K-type orange
Effective Temperature
5,106 K — cooler than the Sun (5,778 K)
Estimated Age
—
Stellar Radius
0.780 R☉
Stellar Mass
0.840 M☉
Metallicity [Fe/H]
0.03
Extended Stellar Properties
Surface gravity (log g)
4.580 dex
Stellar density
2.299 g/cm³
Rotation period
24.87 days
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 17 bands
Astrometric Data
Parallax
3.022 mas
Total Proper Motion
8.195 mas/yr
PM Right Ascension
-8.19 mas/yr
PM Declination
0.12 mas/yr
Galactic Cartesian (pc)
x = -0.676 · y = 0.707 · z = 0.205
Equatorial (J2000)
RA 133.70949° · Dec 11.84827°
Galactic ℓ, b
216.073° · 32.703°
Ecliptic λ, β
132.779° · -5.338°
HTM-20 index
-1890003543
Similar Worlds
Kepler-220 e
Super-Earth · K-type orange
Radius 1.33 R⊕ · 558.1 ly
K2-148 b
Super-Earth · K-type orange
Radius 1.33 R⊕ · 405.9 ly
Kepler-1190 b
Super-Earth · K-type orange
Radius 1.33 R⊕ · 1,117.1 ly
Kepler-707 b
Super-Earth · K-type orange
Radius 1.33 R⊕ · 1,930.1 ly
Kepler-1987 c
Super-Earth · K-type orange
Radius 1.33 R⊕ · 1,942.9 ly
K2-211 b
Super-Earth · K-type orange
Radius 1.33 R⊕ · 888.1 ly