Key parameters at a glance
- A radius of 2.68 Earth radii
- A mass of 7.65 Earth masses
- Surface gravity around 1.07 g
- An orbital period of 38.652 days
- Semi-major axis 0.2186 AU
- Equilibrium temperature 487 K (214 °C)
- Distance from Earth 2,845.20 light-years
- Earth Similarity Index 0.494
- Travel time at Voyager 1 speed 50,175,082 years
2 siblings around Kepler-487
Kepler-487 c shares its host star with 2 other confirmed planets. Side-by-side measurements below.
| Planet | Type | Radius (R⊕) | Mass (M⊕) | Period (d) | Eq. T (K) | Year |
|---|---|---|---|---|---|---|
| Kepler-487 d | Sub-Neptune | 2.78 | 8.12 | 2.418 | 1,226 | 2021 |
| Kepler-487 b | Gas Giant | 11.42 | — | 15.359 | 662 | 2016 |
| Kepler-487 c this | Sub-Neptune | 2.68 | 7.65 | 38.652 | 487 | 2016 |
Kepler-487 c Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#896of 1978
top 45.2%
This planet
2.68R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-487 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.68 | 11.21 |
| Mass (M⊕) | 1.00 | 7.65 | 317.83 |
| Density (g/cm³) | 5.51 | 2.18 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.07 | 2.53 |
| Insolation (S⊕) | 1.00 | 15.04 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 139158696
Gaia DR2
Gaia DR2 2076692386427776768
Gaia DR3
Gaia DR3 2076692386427776768
System
Kepler-487
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 38.65 Earth days (10.6% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.2186 AU.
Transit Fingerprint
Depth
0.057 %
Duration
6.336 h
Impact parameter b
0.520
Rp / R★
0.027610
Transit midpoint (BJD)
2,454,997.0492
Photometric dip
Transit produces a flux drop of 567 ppm lasting ≈ 6.34 h.
Extended Orbital Architecture
Planet / star radius ratio
0.027610
Semi-major axis / stellar radius
48.900
Impact parameter (b)
0.520
Transit mid-time (BJD)
2,454,997.0492
Angular separation (arcsec)
0.25100
Eq. Temperature
487K
(214 °C)
Insolation (S⊕)
15.04
Earth = 1.00
Earth Similarity (ESI)
0.494
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-487
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,444 K — cooler than the Sun (5,778 K)
Estimated Age
5.62 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.880 R☉
Stellar Mass
0.910 M☉
Metallicity [Fe/H]
0.00
Extended Stellar Properties
Surface gravity (log g)
4.510 dex
Stellar density
1.784 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.118 mas
Total Proper Motion
11.481 mas/yr
PM Right Ascension
5.35 mas/yr
PM Declination
10.16 mas/yr
Galactic Cartesian (pc)
x = 0.321 · y = -0.680 · z = 0.659
Equatorial (J2000)
RA 295.28723° · Dec 41.22200°
Galactic ℓ, b
74.885° · 8.999°
Ecliptic λ, β
311.599° · 61.060°
HTM-20 index
1391175676
Similar Worlds
K2-358 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.68 R⊕ · 1,566.6 ly
Kepler-1184 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.68 R⊕ · 3,776.4 ly
Kepler-561 c
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.68 R⊕ · 2,026.7 ly
K2-58 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.68 R⊕ · 592.8 ly
Kepler-899 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.68 R⊕ · 4,065.3 ly
K2-402 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.68 R⊕ · 1,706.0 ly