Key parameters at a glance
- A radius of 2.27 Earth radii
- A mass of 5.77 Earth masses
- Surface gravity around 1.12 g
- An orbital period of 96.170 days
- Semi-major axis 0.3771 AU
- Equilibrium temperature 321 K (48 °C)
- Distance from Earth 3,997.27 light-years
- Earth Similarity Index 0.737
- Travel time at Voyager 1 speed 70,491,854 years
Kepler-1503 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1554of 1978
top 78.5%
This planet
2.27R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-1503 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.27 | 11.21 |
| Mass (M⊕) | 1.00 | 5.77 | 317.83 |
| Density (g/cm³) | 5.51 | 2.71 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.12 | 2.53 |
| Insolation (S⊕) | 1.00 | 5.64 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 270705307
Gaia DR2
Gaia DR2 2077774821262122752
Gaia DR3
Gaia DR3 2077774821262122752
System
Kepler-1503
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 96.17 Earth days (26.3% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.3771 AU.
Transit Fingerprint
Depth
0.089 %
Duration
7.471 h
Impact parameter b
0.271
Rp / R★
0.027633
Transit midpoint (BJD)
2,455,003.2568
Photometric dip
Transit produces a flux drop of 895 ppm lasting ≈ 7.47 h.
Extended Orbital Architecture
Planet / star radius ratio
0.027633
Semi-major axis / stellar radius
100.540
Impact parameter (b)
0.271
Transit mid-time (BJD)
2,455,003.2568
Angular separation (arcsec)
0.30800
Eq. Temperature
321K
(48 °C)
Insolation (S⊕)
5.64
Earth = 1.00
Earth Similarity (ESI)
0.737
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — liquid water is physically possible with adequate atmospheric pressure.
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-1503
Spectral Class
K-type orange
Effective Temperature
5,069 K — cooler than the Sun (5,778 K)
Estimated Age
5.13 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.740 R☉
Stellar Mass
0.770 M☉
Metallicity [Fe/H]
-0.19
Extended Stellar Properties
Surface gravity (log g)
4.590 dex
Stellar density
2.079 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
0.789 mas
Total Proper Motion
10.192 mas/yr
PM Right Ascension
0.15 mas/yr
PM Declination
-10.19 mas/yr
Galactic Cartesian (pc)
x = 0.295 · y = -0.672 · z = 0.680
Equatorial (J2000)
RA 293.72716° · Dec 42.80671°
Galactic ℓ, b
75.760° · 10.763°
Ecliptic λ, β
310.474° · 62.951°
HTM-20 index
-93489378
Similar Worlds
Kepler-306 e
Sub-Neptune · K-type orange
Radius 2.27 R⊕ · 2,529.9 ly
EPIC 212297394 c
Sub-Neptune · K-type orange
Radius 2.27 R⊕ · 1,364.6 ly
TOI-2018 b
Sub-Neptune · K-type orange
Radius 2.27 R⊕ · 91.3 ly
K2-401 b
Sub-Neptune · K-type orange
Radius 2.26 R⊕ · 654.7 ly
Kepler-1996 b
Sub-Neptune · K-type orange
Radius 2.26 R⊕ · 1,436.9 ly
K2-346 b
Sub-Neptune · K-type orange
Radius 2.26 R⊕ · 344.4 ly