Key parameters at a glance
- A radius of 2.05 Earth radii
- A mass of 4.86 Earth masses
- Surface gravity around 1.16 g
- An orbital period of 9.767 days
- Semi-major axis 0.0870 AU
- Equilibrium temperature 791 K (518 °C)
- Distance from Earth 3,380.57 light-years
- Earth Similarity Index 0.345
- Travel time at Voyager 1 speed 59,616,425 years
2 siblings around Kepler-244
Kepler-244 c 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-244 b | Sub-Neptune | 2.76 | 8.05 | 4.312 | 1,038 | 2014 |
| Kepler-244 c this | Sub-Neptune | 2.05 | 4.86 | 9.767 | 791 | 2014 |
| Kepler-244 d | Sub-Neptune | 2.31 | 15.20 | 20.050 | 622 | 2014 |
Kepler-244 c Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1888of 1978
top 95.4%
This planet
2.05R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-244 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.05 | 11.21 |
| Mass (M⊕) | 1.00 | 4.86 | 317.83 |
| Density (g/cm³) | 5.51 | 3.10 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.16 | 2.53 |
| Insolation (S⊕) | 1.00 | 81.57 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 158426969
Gaia DR2
Gaia DR2 2102469921138142208
Gaia DR3
Gaia DR3 2102469921138142208
System
Kepler-244
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 9.77 Earth days (2.7% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0870 AU.
Transit Fingerprint
Depth
0.057 %
Duration
1.373 h
Impact parameter b
0.490
Rp / R★
0.022847
Transit midpoint (BJD)
2,455,019.5790
Photometric dip
Transit produces a flux drop of 569 ppm lasting ≈ 1.37 h.
Extended Orbital Architecture
Planet / star radius ratio
0.022847
Semi-major axis / stellar radius
21.000
Impact parameter (b)
0.490
Transit mid-time (BJD)
2,455,019.5790
Angular separation (arcsec)
0.08390
Eq. Temperature
791K
(518 °C)
Insolation (S⊕)
81.57
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.
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-244
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,554 K — cooler than the Sun (5,778 K)
Estimated Age
2.40 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.803 R☉
Stellar Mass
0.933 M☉
Metallicity [Fe/H]
0.07
Extended Stellar Properties
Surface gravity (log g)
4.585 dex
Stellar density
1.420 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 15 bands
Astrometric Data
Parallax
0.937 mas
Total Proper Motion
14.130 mas/yr
PM Right Ascension
-4.78 mas/yr
PM Declination
13.30 mas/yr
Galactic Cartesian (pc)
x = 0.219 · y = -0.706 · z = 0.673
Equatorial (J2000)
RA 287.24264° · Dec 42.30142°
Galactic ℓ, b
73.203° · 14.867°
Ecliptic λ, β
299.954° · 63.958°
HTM-20 index
-2037622067
Similar Worlds
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Sub-Neptune · G-type yellow (Sun-like)
Radius 2.05 R⊕ · 2,211.3 ly
HD 110113 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.05 R⊕ · 346.7 ly
Kepler-363 d
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.05 R⊕ · 2,487.3 ly
Kepler-868 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.05 R⊕ · 5,196.1 ly
Kepler-311 d
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.05 R⊕ · 2,539.6 ly
Kepler-1958 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.05 R⊕ · 4,306.5 ly