Key parameters at a glance
- A radius of 4.07 Earth radii
- A mass of 15.60 Earth masses
- Surface gravity around 0.94 g
- An orbital period of 16.239 days
- Semi-major axis 0.1230 AU
- Equilibrium temperature 598 K (325 °C)
- Distance from Earth 2,409.61 light-years
- Earth Similarity Index 0.345
- Travel time at Voyager 1 speed 42,493,548 years
- Almost certainly tidally locked to its host star given the close orbit
1 sibling around Kepler-248
Kepler-248 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-248 b | Sub-Neptune | 3.02 | 9.38 | 6.308 | 819 | 2014 |
| Kepler-248 c this | Neptune-like | 4.07 | 15.60 | 16.239 | 598 | 2014 |
Kepler-248 c Planet Profile
Physical Specs
Classification
Planet Type
Neptune-like
Discovery
Size rank in cohort
Rank by radius
#551of 574
top 95.8%
This planet
4.07R⊕
Neptune-like median
6.39R⊕
Nearest-size peers
| Metric | Earth | Kepler-248 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 4.07 | 11.21 |
| Mass (M⊕) | 1.00 | 15.60 | 317.83 |
| Density (g/cm³) | 5.51 | 1.27 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.94 | 2.53 |
| Insolation (S⊕) | 1.00 | 22.46 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 275493574
Gaia DR2
Gaia DR2 2126266823097360000
Gaia DR3
Gaia DR3 2126266823097360000
System
Kepler-248
Percentile among Neptune-like cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 16.24 Earth days (4.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1230 AU.
Transit Fingerprint
Depth
0.259 %
Duration
4.030 h
Impact parameter b
0.080
Rp / R★
0.046223
Transit midpoint (BJD)
2,455,008.5690
Photometric dip
Transit produces a flux drop of 2,591 ppm lasting ≈ 4.03 h.
Extended Orbital Architecture
Planet / star radius ratio
0.046223
Semi-major axis / stellar radius
32.020
Impact parameter (b)
0.080
Transit mid-time (BJD)
2,455,008.5690
Angular separation (arcsec)
0.16600
Eq. Temperature
598K
(325 °C)
Insolation (S⊕)
22.46
Earth = 1.00
Earth Similarity (ESI)
0.345
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water. Close-orbiting tidally-locked around a cool host.
Discovery Paper
Primary reference
Rowe et al. 2014Instrument
Kepler CCD Array
Publication
2014-03
Observation locale
Space
Discovery cohort
Planets confirmed in 2014 at Kepler (12 shown).
Host System: Kepler-248
Spectral Class
K-type orange
Effective Temperature
5,190 K — cooler than the Sun (5,778 K)
Estimated Age
2.34 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.831 R☉
Stellar Mass
0.838 M☉
Metallicity [Fe/H]
0.17
Extended Stellar Properties
Surface gravity (log g)
4.573 dex
Stellar density
1.780 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.325 mas
Total Proper Motion
1.402 mas/yr
PM Right Ascension
-1.30 mas/yr
PM Declination
0.52 mas/yr
Galactic Cartesian (pc)
x = 0.284 · y = -0.667 · z = 0.689
Equatorial (J2000)
RA 293.06131° · Dec 43.58136°
Galactic ℓ, b
76.241° · 11.546°
Ecliptic λ, β
310.070° · 63.847°
HTM-20 index
-625879016
Similar Worlds
HD 190007 b
Neptune-like · K-type orange
Radius 4.06 R⊕ · 41.5 ly
Kepler-258 b
Neptune-like · K-type orange
Radius 4.06 R⊕ · 1,878.6 ly
TOI-1472 b
Neptune-like · K-type orange
Radius 4.06 R⊕ · 397.4 ly
Kepler-247 c
Neptune-like · K-type orange
Radius 4.09 R⊕ · 2,164.7 ly
BD-11 4672 c
Neptune-like · K-type orange
Radius 4.04 R⊕ · 88.6 ly
Kepler-815 b
Neptune-like · K-type orange
Radius 4.11 R⊕ · 4,107.2 ly