Key parameters at a glance
- A radius of 2.33 Earth radii
- A mass of 6.04 Earth masses
- Surface gravity around 1.11 g
- An orbital period of 12.718 days
- Semi-major axis 0.0940 AU
- Equilibrium temperature 562 K (289 °C)
- Distance from Earth 1,669.92 light-years
- Earth Similarity Index 0.459
- Travel time at Voyager 1 speed 29,449,015 years
- Almost certainly tidally locked to its host star given the close orbit
1 sibling around Kepler-241
Kepler-241 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-241 b this | Sub-Neptune | 2.33 | 6.04 | 12.718 | 562 | 2014 |
| Kepler-241 c | Sub-Neptune | 2.57 | 7.13 | 36.066 | 397 | 2014 |
Kepler-241 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1451of 1978
top 73.3%
This planet
2.33R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-241 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.33 | 11.21 |
| Mass (M⊕) | 1.00 | 6.04 | 317.83 |
| Density (g/cm³) | 5.51 | 2.62 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.11 | 2.53 |
| Insolation (S⊕) | 1.00 | 23.60 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 137899939
Gaia DR2
Gaia DR2 2053551068272937088
Gaia DR3
Gaia DR3 2053551068272937088
System
Kepler-241
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 12.72 Earth days (3.5% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0940 AU.
Transit Fingerprint
Depth
0.115 %
Duration
3.117 h
Impact parameter b
0.540
Rp / R★
0.030871
Transit midpoint (BJD)
2,455,008.3542
Photometric dip
Transit produces a flux drop of 1,149 ppm lasting ≈ 3.12 h.
Extended Orbital Architecture
Planet / star radius ratio
0.030871
Semi-major axis / stellar radius
31.510
Impact parameter (b)
0.540
Transit mid-time (BJD)
2,455,008.3542
Angular separation (arcsec)
0.18400
Eq. Temperature
562K
(289 °C)
Insolation (S⊕)
23.60
Earth = 1.00
Earth Similarity (ESI)
0.459
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-241
Spectral Class
K-type orange
Effective Temperature
4,699 K — cooler than the Sun (5,778 K)
Estimated Age
13.90 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.668 R☉
Stellar Mass
0.671 M☉
Metallicity [Fe/H]
0.03
Extended Stellar Properties
Surface gravity (log g)
4.627 dex
Stellar density
3.785 g/cm³
Metallicity ratio
[M/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.640 mas
Total Proper Motion
13.505 mas/yr
PM Right Ascension
1.05 mas/yr
PM Declination
13.46 mas/yr
Galactic Cartesian (pc)
x = 0.294 · y = -0.695 · z = 0.657
Equatorial (J2000)
RA 292.91311° · Dec 41.06098°
Galactic ℓ, b
73.898° · 10.508°
Ecliptic λ, β
307.983° · 61.513°
HTM-20 index
1755800322
Similar Worlds
Kepler-1983 b
Sub-Neptune · K-type orange
Radius 2.33 R⊕ · 1,384.3 ly
Kepler-287 b
Sub-Neptune · K-type orange
Radius 2.33 R⊕ · 2,726.2 ly
Kepler-443 b
Sub-Neptune · K-type orange
Radius 2.33 R⊕ · 2,616.7 ly
Kepler-436 c
Sub-Neptune · K-type orange
Radius 2.33 R⊕ · 1,920.6 ly
Kepler-239 b
Sub-Neptune · K-type orange
Radius 2.33 R⊕ · 2,113.8 ly
Kepler-1802 c
Sub-Neptune · K-type orange
Radius 2.32 R⊕ · 2,076.6 ly