Key parameters at a glance
- A radius of 7.97 Earth radii
- A mass of 48.70 Earth masses
- Surface gravity around 0.77 g
- An orbital period of 35.801 days
- Semi-major axis 0.2588 AU
- Equilibrium temperature 991 K (718 °C)
- Distance from Earth 3,309.24 light-years
- Earth Similarity Index 0.151
- Travel time at Voyager 1 speed 58,358,515 years
1 sibling around Kepler-1487
Kepler-1487 c 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-1487 b | Sub-Neptune | 2.13 | 5.18 | 7.319 | 1,682 | 2016 |
| Kepler-1487 c this | Neptune-like | 7.97 | 48.70 | 35.801 | 991 | 2023 |
Kepler-1487 c Planet Profile
Physical Specs
Classification
Planet Type
Neptune-like
Discovery
Size rank in cohort
Rank by radius
#157of 574
top 27.2%
This planet
7.97R⊕
Neptune-like median
6.39R⊕
Nearest-size peers
| Metric | Earth | Kepler-1487 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 7.97 | 11.21 |
| Mass (M⊕) | 1.00 | 48.70 | 317.83 |
| Density (g/cm³) | 5.51 | 0.53 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.77 | 2.53 |
| Insolation (S⊕) | 1.00 | 227.68 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 184015844
Gaia DR2
Gaia DR2 2073153024144692736
Gaia DR3
Gaia DR3 2073153024144692736
System
Kepler-1487
Percentile among Neptune-like cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 35.80 Earth days (9.8% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.2588 AU.
Transit Fingerprint
Depth
0.042 %
Duration
8.219 h
Impact parameter b
0.043
Rp / R★
0.018458
Transit midpoint (BJD)
2,454,977.9217
Photometric dip
Transit produces a flux drop of 417 ppm lasting ≈ 8.22 h.
Extended Orbital Architecture
Planet / star radius ratio
0.018458
Semi-major axis / stellar radius
33.860
Impact parameter (b)
0.043
Transit mid-time (BJD)
2,454,977.9217
Angular separation (arcsec)
0.25500
Eq. Temperature
991K
(718 °C)
Insolation (S⊕)
227.68
Earth = 1.00
Earth Similarity (ESI)
0.151
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
Valizadegan et al. 2023Instrument
Kepler CCD Array
Publication
2023-05
Observation locale
Space
Discovery cohort
Planets confirmed in 2023 at Kepler (12 shown).
Host System: Kepler-1487
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,745 K — cooler than the Sun (5,778 K)
Estimated Age
1.95 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
3.955 R☉
Stellar Mass
1.801 M☉
Metallicity [Fe/H]
0.40
Extended Stellar Properties
Surface gravity (log g)
3.499 dex
Stellar density
0.573 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
0.957 mas
Total Proper Motion
14.755 mas/yr
PM Right Ascension
-6.15 mas/yr
PM Declination
-13.41 mas/yr
Galactic Cartesian (pc)
x = 0.336 · y = -0.705 · z = 0.624
Equatorial (J2000)
RA 295.49807° · Dec 38.64445°
Galactic ℓ, b
72.676° · 7.624°
Ecliptic λ, β
310.159° · 58.580°
HTM-20 index
-2029920218
Similar Worlds
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Neptune-like · G-type yellow (Sun-like)
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TOI-1775 b
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Kepler-9 c
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Kepler-849 b
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Radius 8.08 R⊕ · 2,681.4 ly
TOI-2000 c
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Kepler-35 b
Neptune-like · G-type yellow (Sun-like)
Radius 8.16 R⊕ · 5,933.3 ly