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 4.529 days
- Equilibrium temperature 888 K (615 °C)
- Distance from Earth 1,069.08 light-years
- Earth Similarity Index 0.340
- 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 d shares its host star with 4 other confirmed planets. Side-by-side measurements below.
K2-268 d Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#766of 1176
top 65.1%
This planet
1.49R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | K2-268 d | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.49 | 11.21 |
| Mass (M⊕) | 1.00 | 2.83 | 317.83 |
| Density (g/cm³) | 5.51 | 4.70 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.27 | 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 4.53 Earth days (1.2% of a terrestrial year).
Transit Fingerprint
Depth
0.053 %
Duration
2.570 h
Impact parameter b
0.400
Rp / R★
0.017300
Transit midpoint (BJD)
2,457,143.9747
Photometric dip
Transit produces a flux drop of 531 ppm lasting ≈ 2.57 h.
Extended Orbital Architecture
Planet / star radius ratio
0.017300
Semi-major axis / stellar radius
12.570
Impact parameter (b)
0.400
Transit mid-time (BJD)
2,457,143.9747
Eq. Temperature
888K
(615 °C)
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.340
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
KMT-2021-BLG-0912L b
Super-Earth · K-type orange
Radius 1.49 R⊕ · 18,134.3 ly
Kepler-1614 b
Super-Earth · K-type orange
Radius 1.49 R⊕ · 3,885.1 ly
TOI-431 c
Super-Earth · K-type orange
Radius 1.49 R⊕ · 106.2 ly
Kepler-898 b
Super-Earth · K-type orange
Radius 1.49 R⊕ · 1,581.5 ly
Kepler-174 c
Super-Earth · K-type orange
Radius 1.49 R⊕ · 1,254.9 ly
Kepler-1492 b
Super-Earth · K-type orange
Radius 1.49 R⊕ · 1,081.4 ly