Key parameters at a glance
- A radius of 1.90 Earth radii
- A mass of 4.27 Earth masses
- Surface gravity around 1.18 g
- An orbital period of 13.607 days
- Semi-major axis 0.1106 AU
- Equilibrium temperature 698 K (425 °C)
- Distance from Earth 1,079.30 light-years
- Earth Similarity Index 0.401
- Travel time at Voyager 1 speed 19,033,497 years
3 siblings around K2-187
K2-187 e shares its host star with 3 other confirmed planets. Side-by-side measurements below.
K2-187 e Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#125of 1176
top 10.5%
This planet
1.90R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | K2-187 e | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.90 | 11.21 |
| Mass (M⊕) | 1.00 | 4.27 | 317.83 |
| Density (g/cm³) | 5.51 | 3.42 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.18 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Star Catalogue Identifiers
TIC
TIC 332024125
Gaia DR2
Gaia DR2 689268759823937280
Gaia DR3
Gaia DR3 689268759823937280
System
K2-187
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 13.61 Earth days (3.7% of a terrestrial year) at a mean orbital distance of 0.1106 AU.
Transit Fingerprint
Depth
0.075 %
Duration
4.030 h
Impact parameter b
0.430
Rp / R★
0.020600
Transit midpoint (BJD)
2,457,155.0850
Photometric dip
Transit produces a flux drop of 748 ppm lasting ≈ 4.03 h.
Extended Orbital Architecture
Planet / star radius ratio
0.020600
Semi-major axis / stellar radius
28.000
Impact parameter (b)
0.430
Transit mid-time (BJD)
2,457,155.0850
Angular separation (arcsec)
0.33400
Eq. Temperature
698K
(425 °C)
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.401
0 = alien, 1 = Earth-identical
Insufficient insolation data — the surface is too hot to retain surface water.
Discovery Paper
Primary reference
Mayo et al. 2018Instrument
Kepler CCD Array
Publication
2018-03
Observation locale
Space
Discovery cohort
Planets confirmed in 2018 at K2 (12 shown).
Host System: K2-187
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,438 K — cooler than the Sun (5,778 K)
Estimated Age
—
Stellar Radius
0.830 R☉
Stellar Mass
0.967 M☉
Metallicity [Fe/H]
0.00
Extended Stellar Properties
Surface gravity (log g)
4.600 dex
Stellar density
1.682 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 17 bands
Astrometric Data
Parallax
2.994 mas
Total Proper Motion
32.914 mas/yr
PM Right Ascension
-11.86 mas/yr
PM Declination
-30.70 mas/yr
Galactic Cartesian (pc)
x = -0.621 · y = 0.677 · z = 0.394
Equatorial (J2000)
RA 132.52356° · Dec 23.19247°
Galactic ℓ, b
202.777° · 35.764°
Ecliptic λ, β
128.598° · 5.270°
HTM-20 index
800566993
Similar Worlds
Kepler-60 c
Super-Earth · G-type yellow (Sun-like)
Radius 1.90 R⊕ · 3,343.4 ly
Kepler-1177 b
Super-Earth · G-type yellow (Sun-like)
Radius 1.90 R⊕ · 4,239.9 ly
Kepler-1078 b
Super-Earth · G-type yellow (Sun-like)
Radius 1.90 R⊕ · 8,094.2 ly
TOI-1136 b
Super-Earth · G-type yellow (Sun-like)
Radius 1.90 R⊕ · 275.7 ly
KOI-1599.02
Super-Earth · G-type yellow (Sun-like)
Radius 1.90 R⊕ · 3,690.9 ly
Kepler-1596 b
Super-Earth · G-type yellow (Sun-like)
Radius 1.90 R⊕ · 7,000.1 ly