Key parameters at a glance
- A radius of 2.76 Earth radii
- A mass of 8.05 Earth masses
- Surface gravity around 1.06 g
- An orbital period of 4.312 days
- Semi-major axis 0.0500 AU
- Equilibrium temperature 1,038 K (765 °C)
- Distance from Earth 3,380.57 light-years
- Earth Similarity Index 0.231
- Travel time at Voyager 1 speed 59,616,425 years
2 siblings around Kepler-244
Kepler-244 b 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 this | Sub-Neptune | 2.76 | 8.05 | 4.312 | 1,038 | 2014 |
| Kepler-244 c | 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 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#794of 1978
top 40.1%
This planet
2.76R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-244 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.76 | 11.21 |
| Mass (M⊕) | 1.00 | 8.05 | 317.83 |
| Density (g/cm³) | 5.51 | 2.10 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.06 | 2.53 |
| Insolation (S⊕) | 1.00 | 242.47 | 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 4.31 Earth days (1.2% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0500 AU.
Transit Fingerprint
Depth
0.115 %
Duration
2.735 h
Impact parameter b
0.520
Rp / R★
0.030716
Transit midpoint (BJD)
2,455,006.5757
Photometric dip
Transit produces a flux drop of 1,154 ppm lasting ≈ 2.74 h.
Extended Orbital Architecture
Planet / star radius ratio
0.030716
Semi-major axis / stellar radius
12.250
Impact parameter (b)
0.520
Transit mid-time (BJD)
2,455,006.5757
Angular separation (arcsec)
0.04820
Eq. Temperature
1,038K
(765 °C)
Insolation (S⊕)
242.47
Earth = 1.00
Earth Similarity (ESI)
0.231
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.
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
Kepler-1458 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.76 R⊕ · 1,775.8 ly
Kepler-172 e
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.76 R⊕ · 2,702.5 ly
Kepler-819 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.76 R⊕ · 2,166.7 ly
Kepler-607 c
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.76 R⊕ · 1,693.1 ly
Kepler-1944 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.76 R⊕ · 3,511.0 ly
Kepler-449 c
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.76 R⊕ · 789.1 ly