Key parameters at a glance
- A radius of 2.34 Earth radii
- A mass of 6.08 Earth masses
- Surface gravity around 1.11 g
- An orbital period of 4.602 days
- Semi-major axis 0.0520 AU
- Equilibrium temperature 896 K (623 °C)
- Distance from Earth 2,041.99 light-years
- Earth Similarity Index 0.288
- Travel time at Voyager 1 speed 36,010,509 years
1 sibling around Kepler-246
Kepler-246 b 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-246 b this | Sub-Neptune | 2.34 | 6.08 | 4.602 | 896 | 2014 |
| Kepler-246 c | Super-Earth | 1.50 | 2.86 | 11.187 | 667 | 2014 |
Kepler-246 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1429of 1978
top 72.2%
This planet
2.34R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-246 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.34 | 11.21 |
| Mass (M⊕) | 1.00 | 6.08 | 317.83 |
| Density (g/cm³) | 5.51 | 2.61 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.11 | 2.53 |
| Insolation (S⊕) | 1.00 | 141.61 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 272484980
Gaia DR2
Gaia DR2 2077203728052488192
Gaia DR3
Gaia DR3 2077203728052488192
System
Kepler-246
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 4.60 Earth days (1.3% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0520 AU.
Transit Fingerprint
Depth
0.076 %
Duration
2.227 h
Impact parameter b
0.580
Rp / R★
0.026776
Transit midpoint (BJD)
2,455,002.9789
Photometric dip
Transit produces a flux drop of 756 ppm lasting ≈ 2.23 h.
Extended Orbital Architecture
Planet / star radius ratio
0.026776
Semi-major axis / stellar radius
13.430
Impact parameter (b)
0.580
Transit mid-time (BJD)
2,455,002.9789
Angular separation (arcsec)
0.08310
Eq. Temperature
896K
(623 °C)
Insolation (S⊕)
141.61
Earth = 1.00
Earth Similarity (ESI)
0.288
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
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-246
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,206 K — cooler than the Sun (5,778 K)
Estimated Age
1.26 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.831 R☉
Stellar Mass
0.853 M☉
Metallicity [Fe/H]
0.20
Extended Stellar Properties
Surface gravity (log g)
4.557 dex
Stellar density
1.850 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.569 mas
Total Proper Motion
9.855 mas/yr
PM Right Ascension
-1.80 mas/yr
PM Declination
-9.69 mas/yr
Galactic Cartesian (pc)
x = 0.328 · y = -0.658 · z = 0.678
Equatorial (J2000)
RA 296.48340° · Dec 42.66338°
Galactic ℓ, b
76.597° · 8.909°
Ecliptic λ, β
314.444° · 62.077°
HTM-20 index
1384818628
Similar Worlds
Kepler-171 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.34 R⊕ · 2,817.5 ly
Kepler-29 c
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.34 R⊕ · 2,715.4 ly
HD 158259 e
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.34 R⊕ · 88.2 ly
Kepler-121 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.34 R⊕ · 1,665.1 ly
Kepler-338 c
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.34 R⊕ · 1,803.0 ly
Kepler-213 c
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.34 R⊕ · 2,070.9 ly