Key parameters at a glance
- A radius of 1.30 Earth radii
- A mass of 2.24 Earth masses
- Surface gravity around 1.33 g
- An orbital period of 2.901 days
- Semi-major axis 0.0350 AU
- Distance from Earth 437.66 light-years
- Earth Similarity Index 0.939
- Travel time at Voyager 1 speed 7,718,173 years
- Almost certainly tidally locked to its host star given the close orbit
1 sibling around K2-90
K2-90 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 |
|---|---|---|---|---|---|---|
| K2-90 c this | Super-Earth | 1.30 | 2.24 | 2.901 | — | 2016 |
| K2-90 b | Sub-Neptune | 2.60 | 7.27 | 13.733 | 502 | 2016 |
K2-90 c Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#1090of 1176
top 92.6%
This planet
1.30R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | K2-90 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.30 | 11.21 |
| Mass (M⊕) | 1.00 | 2.24 | 317.83 |
| Density (g/cm³) | 5.51 | 5.60 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.33 | 2.53 |
| Insolation (S⊕) | 1.00 | 80.80 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 14111411
Gaia DR2
Gaia DR2 65331198513957376
Gaia DR3
Gaia DR3 65331198513957376
System
K2-90
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 2.90 Earth days (0.8% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.0350 AU.
Transit Fingerprint
Depth
0.039 %
Duration
1.303 h
Rp / R★
0.018733
Transit midpoint (BJD)
2,457,066.7400
Photometric dip
Transit produces a flux drop of 389 ppm lasting ≈ 1.30 h.
Extended Orbital Architecture
Planet / star radius ratio
0.018733
Semi-major axis / stellar radius
12.020
Transit mid-time (BJD)
2,457,066.7400
Long. of periastron (ω)
56.76°
Angular separation (arcsec)
0.26100
Eq. Temperature
—
Insolation (S⊕)
80.80
Earth = 1.00
Earth Similarity (ESI)
0.939
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water). Close-orbiting tidally-locked around a cool host.
Discovery Paper
Primary reference
Crossfield et al. 2016Instrument
Kepler CCD Array
Publication
2016-09
Observation locale
Space
Discovery cohort
Planets confirmed in 2016 at K2 (12 shown).
Host System: K2-90
Spectral Class
K-type orange
Effective Temperature
4,422 K — cooler than the Sun (5,778 K)
Estimated Age
—
Stellar Radius
0.635 R☉
Stellar Mass
0.705 M☉
Metallicity [Fe/H]
-0.23
Extended Stellar Properties
Surface gravity (log g)
4.653 dex
Stellar density
3.740 g/cm³
Systemic radial velocity
19.16 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 12 bands
Astrometric Data
Parallax
7.423 mas
Total Proper Motion
85.794 mas/yr
PM Right Ascension
72.81 mas/yr
PM Declination
-45.38 mas/yr
Galactic Cartesian (pc)
x = 0.474 · y = 0.793 · z = 0.382
Equatorial (J2000)
RA 59.15274° · Dec 22.47245°
Galactic ℓ, b
169.548° · -23.201°
Ecliptic λ, β
61.695° · 2.013°
HTM-20 index
-222436296
Similar Worlds
Kepler-1379 b
Super-Earth · K-type orange
Radius 1.30 R⊕ · 3,168.0 ly
Kepler-1254 c
Super-Earth · K-type orange
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K2-102 b
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Kepler-367 b
Super-Earth · K-type orange
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TOI-2076 e
Super-Earth · K-type orange
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Kepler-1254 d
Super-Earth · K-type orange
Radius 1.31 R⊕ · 2,031.4 ly