Key parameters at a glance
- A radius of 11.42 Earth radii
- An orbital period of 15.359 days
- Semi-major axis 0.1182 AU
- Equilibrium temperature 662 K (389 °C)
- Distance from Earth 2,845.20 light-years
- Earth Similarity Index 0.147
- Travel time at Voyager 1 speed 50,175,082 years
2 siblings around Kepler-487
Kepler-487 b 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 this | Gas Giant | 11.42 | — | 15.359 | 662 | 2016 |
| Kepler-487 c | Sub-Neptune | 2.68 | 7.65 | 38.652 | 487 | 2016 |
Kepler-487 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1603of 1771
top 90.5%
This planet
11.42R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | Kepler-487 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 11.42 | 11.21 |
| Mass (M⊕) | 1.00 | — | 317.83 |
| Density (g/cm³) | 5.51 | — | 1.33 |
| Surface Gravity (g) | 1.00 | — | 2.53 |
| Insolation (S⊕) | 1.00 | 51.49 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 139158696
Gaia DR2
Gaia DR2 2076692386427776768
Gaia DR3
Gaia DR3 2076692386427776768
System
Kepler-487
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 15.36 Earth days (4.2% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1182 AU.
Transit Fingerprint
Depth
1.464 %
Duration
4.145 h
Impact parameter b
0.516
Rp / R★
0.119005
Transit midpoint (BJD)
2,454,965.3851
Photometric dip
Transit produces a flux drop of 14,638 ppm lasting ≈ 4.15 h.
Extended Orbital Architecture
Planet / star radius ratio
0.119005
Semi-major axis / stellar radius
28.123
Impact parameter (b)
0.516
Transit mid-time (BJD)
2,454,965.3851
Angular separation (arcsec)
0.13500
Eq. Temperature
662K
(389 °C)
Insolation (S⊕)
51.49
Earth = 1.00
Earth Similarity (ESI)
0.147
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
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