Key parameters at a glance
- A radius of 1.84 Earth radii
- A mass of 4.04 Earth masses
- Surface gravity around 1.19 g
- An orbital period of 20.422 days
- Semi-major axis 0.1543 AU
- Equilibrium temperature 785 K (512 °C)
- Distance from Earth 2,891.66 light-years
- Earth Similarity Index 0.360
- Travel time at Voyager 1 speed 50,994,421 years
1 sibling around Kepler-887
Kepler-887 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 |
|---|---|---|---|---|---|---|
| Kepler-887 c | Rocky Terrestrial | 1.13 | 1.51 | 7.638 | 1,089 | 2016 |
| Kepler-887 b this | Super-Earth | 1.84 | 4.04 | 20.422 | 785 | 2016 |
Kepler-887 b Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#201of 1176
top 17.0%
This planet
1.84R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | Kepler-887 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.84 | 11.21 |
| Mass (M⊕) | 1.00 | 4.04 | 317.83 |
| Density (g/cm³) | 5.51 | 3.56 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.19 | 2.53 |
| Insolation (S⊕) | 1.00 | 109.84 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 122293639
Gaia DR2
Gaia DR2 2101093092063293824
Gaia DR3
Gaia DR3 2101093092063293824
System
Kepler-887
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 20.42 Earth days (5.6% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1543 AU.
Transit Fingerprint
Depth
0.019 %
Duration
6.192 h
Impact parameter b
0.646
Rp / R★
0.012627
Transit midpoint (BJD)
2,454,979.9833
Photometric dip
Transit produces a flux drop of 189 ppm lasting ≈ 6.19 h.
Extended Orbital Architecture
Planet / star radius ratio
0.012627
Semi-major axis / stellar radius
25.490
Impact parameter (b)
0.646
Transit mid-time (BJD)
2,454,979.9833
Angular separation (arcsec)
0.17400
Eq. Temperature
785K
(512 °C)
Insolation (S⊕)
109.84
Earth = 1.00
Earth Similarity (ESI)
0.360
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water.
Discovery Paper
Primary reference
Morton et al. 2016Instrument
Kepler CCD Array
Publication
2016-05
Observation locale
Space
Discovery cohort
Planets confirmed in 2016 at Kepler (12 shown).
Host System: Kepler-887
Spectral Class
F-type yellow-white
Effective Temperature
6,194 K — hotter than the Sun (5,778 K)
Estimated Age
3.09 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.290 R☉
Stellar Mass
1.190 M☉
Metallicity [Fe/H]
0.08
Extended Stellar Properties
Surface gravity (log g)
4.290 dex
Stellar density
0.470 g/cm³
Systemic radial velocity
-5.41 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.099 mas
Total Proper Motion
12.935 mas/yr
PM Right Ascension
-6.34 mas/yr
PM Declination
-11.27 mas/yr
Galactic Cartesian (pc)
x = 0.264 · y = -0.721 · z = 0.640
Equatorial (J2000)
RA 290.09079° · Dec 39.81691°
Galactic ℓ, b
71.792° · 11.884°
Ecliptic λ, β
302.943° · 60.978°
HTM-20 index
-841338039
Similar Worlds
Kepler-1370 b
Super-Earth · F-type yellow-white
Radius 1.84 R⊕ · 3,274.9 ly
Kepler-274 c
Super-Earth · F-type yellow-white
Radius 1.84 R⊕ · 4,349.7 ly
Kepler-1691 b
Super-Earth · F-type yellow-white
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Kepler-350 b
Super-Earth · F-type yellow-white
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Kepler-217 c
Super-Earth · F-type yellow-white
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Kepler-341 d
Super-Earth · F-type yellow-white
Radius 1.85 R⊕ · 3,415.0 ly