Key parameters at a glance
- A radius of 1.59 Earth radii
- A mass of 3.15 Earth masses
- Surface gravity around 1.25 g
- An orbital period of 8.753 days
- Semi-major axis 0.0705 AU
- Distance from Earth 839.67 light-years
- Earth Similarity Index 0.870
- Travel time at Voyager 1 speed 14,807,505 years
- Almost certainly tidally locked to its host star given the close orbit
1 sibling around K2-50
K2-50 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 |
|---|---|---|---|---|---|---|
| EPIC 201833600 c | Rocky Terrestrial | 1.00 | 0.97 | 3.962 | — | 2019 |
| K2-50 b this | Super-Earth | 1.59 | 3.15 | 8.753 | — | 2016 |
K2-50 b Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#588of 1176
top 49.9%
This planet
1.59R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | K2-50 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.59 | 11.21 |
| Mass (M⊕) | 1.00 | 3.15 | 317.83 |
| Density (g/cm³) | 5.51 | 4.31 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.25 | 2.53 |
| Insolation (S⊕) | 1.00 | 18.80 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 363444743
Gaia DR2
Gaia DR2 3817000078053804672
Gaia DR3
Gaia DR3 3817000078053804672
System
K2-50
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 8.75 Earth days (2.4% of a terrestrial year) at a mean orbital distance of 0.0705 AU.
Transit Fingerprint
Depth
0.134 %
Duration
2.680 h
Impact parameter b
0.540
Rp / R★
0.026400
Transit midpoint (BJD)
2,456,810.3311
Photometric dip
Transit produces a flux drop of 1,337 ppm lasting ≈ 2.68 h.
Extended Orbital Architecture
Planet / star radius ratio
0.026400
Semi-major axis / stellar radius
20.600
Impact parameter (b)
0.540
Transit mid-time (BJD)
2,456,810.3311
Angular separation (arcsec)
0.27400
Eq. Temperature
—
Insolation (S⊕)
18.80
Earth = 1.00
Earth Similarity (ESI)
0.870
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: K2-50
Spectral Class
K-type orange
Effective Temperature
4,326 K — cooler than the Sun (5,778 K)
Estimated Age
—
Stellar Radius
0.546 R☉
Stellar Mass
0.611 M☉
Metallicity [Fe/H]
-0.11
Extended Stellar Properties
Surface gravity (log g)
4.742 dex
Stellar density
2.552 g/cm³
Metallicity ratio
[M/H]
Multi-band Host Photometry — 12 bands
Astrometric Data
Parallax
3.856 mas
Total Proper Motion
25.710 mas/yr
PM Right Ascension
8.75 mas/yr
PM Declination
-24.18 mas/yr
Galactic Cartesian (pc)
x = -0.978 · y = 0.182 · z = 0.104
Equatorial (J2000)
RA 169.48365° · Dec 5.98829°
Galactic ℓ, b
252.271° · 59.322°
Ecliptic λ, β
167.985° · 1.347°
HTM-20 index
-1905948637
Similar Worlds
Kepler-55 d
Super-Earth · K-type orange
Radius 1.59 R⊕ · 1,887.8 ly
Kepler-928 b
Super-Earth · K-type orange
Radius 1.59 R⊕ · 1,659.5 ly
Kepler-55 f
Super-Earth · K-type orange
Radius 1.59 R⊕ · 1,887.8 ly
K2-344 b
Super-Earth · K-type orange
Radius 1.59 R⊕ · 245.2 ly
Kepler-1804 b
Super-Earth · K-type orange
Radius 1.60 R⊕ · 1,417.0 ly
EPIC 212499991 b
Super-Earth · K-type orange
Radius 1.60 R⊕ · 924.0 ly