Key parameters at a glance
- A radius of 1.54 Earth radii
- A mass of 2.98 Earth masses
- Surface gravity around 1.26 g
- An orbital period of 2.381 days
- Distance from Earth 1,372.53 light-years
- Earth Similarity Index 0.882
- Travel time at Voyager 1 speed 24,204,502 years
- Almost certainly tidally locked to its host star given the close orbit
K2-385 b Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#681of 1176
top 57.8%
This planet
1.54R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | K2-385 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.54 | 11.21 |
| Mass (M⊕) | 1.00 | 2.98 | 317.83 |
| Density (g/cm³) | 5.51 | 4.49 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.26 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Star Catalogue Identifiers
TIC
TIC 257429687
Gaia DR2
Gaia DR2 2552976943549668352
Gaia DR3
Gaia DR3 2552976943549668352
System
K2-385
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 2.38 Earth days (0.7% of a terrestrial year).
Transit Fingerprint
Depth
0.051 %
Duration
1.920 h
Impact parameter b
0.361
Rp / R★
0.018500
Transit midpoint (BJD)
2,457,393.4544
Photometric dip
Transit produces a flux drop of 506 ppm lasting ≈ 1.92 h.
Extended Orbital Architecture
Planet / star radius ratio
0.018500
Semi-major axis / stellar radius
10.070
Impact parameter (b)
0.361
Transit mid-time (BJD)
2,457,393.4544
Eq. Temperature
—
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.882
0 = alien, 1 = Earth-identical
Insufficient insolation data. Close-orbiting tidally-locked around a cool host.
Discovery Paper
Primary reference
Christiansen et al. 2022Instrument
Kepler CCD Array
Publication
2022-03
Observation locale
Space
Discovery cohort
Planets confirmed in 2022 at K2 (12 shown).
Host System: K2-385
Spectral Class
K-type orange
Effective Temperature
4,844 K — cooler than the Sun (5,778 K)
Estimated Age
—
Stellar Radius
0.761 R☉
Stellar Mass
0.927 M☉
Metallicity [Fe/H]
-0.22
Extended Stellar Properties
Surface gravity (log g)
4.640 dex
Stellar density
2.488 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 17 bands
Astrometric Data
Parallax
2.348 mas
Total Proper Motion
69.778 mas/yr
PM Right Ascension
65.50 mas/yr
PM Declination
-24.05 mas/yr
Galactic Cartesian (pc)
x = 0.971 · y = 0.217 · z = 0.102
Equatorial (J2000)
RA 12.61408° · Dec 5.87126°
Galactic ℓ, b
122.484° · -57.000°
Ecliptic λ, β
13.883° · 0.426°
HTM-20 index
1153895398
Similar Worlds
Kepler-1228 b
Super-Earth · K-type orange
Radius 1.54 R⊕ · 1,681.2 ly
Kepler-895 b
Super-Earth · K-type orange
Radius 1.54 R⊕ · 1,761.7 ly
TOI-2431 b
Super-Earth · K-type orange
Radius 1.53 R⊕ · 117.6 ly
Kepler-1805 b
Super-Earth · K-type orange
Radius 1.55 R⊕ · 722.9 ly
Kepler-1356 b
Super-Earth · K-type orange
Radius 1.53 R⊕ · 2,756.8 ly
Kepler-80 d
Super-Earth · K-type orange
Radius 1.53 R⊕ · 1,205.0 ly