Key parameters at a glance
- A radius of 3.11 Earth radii
- A mass of 9.85 Earth masses
- Surface gravity around 1.02 g
- An orbital period of 19.672 days
- Semi-major axis 0.1473 AU
- Equilibrium temperature 908 K (635 °C)
- Distance from Earth 2,806.15 light-years
- Earth Similarity Index 0.254
- Travel time at Voyager 1 speed 49,486,424 years
1 sibling around Kepler-1641
Kepler-1641 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-1641 b this | Sub-Neptune | 3.11 | 9.85 | 19.672 | 908 | 2016 |
| Kepler-1641 c | Sub-Neptune | 2.95 | 9.01 | 32.657 | 767 | 2016 |
Kepler-1641 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#426of 1978
top 21.5%
This planet
3.11R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-1641 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 3.11 | 11.21 |
| Mass (M⊕) | 1.00 | 9.85 | 317.83 |
| Density (g/cm³) | 5.51 | 1.80 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.02 | 2.53 |
| Insolation (S⊕) | 1.00 | 82.83 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 184426431
Gaia DR2
Gaia DR2 2077041103410971392
Gaia DR3
Gaia DR3 2077041103410971392
System
Kepler-1641
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 19.67 Earth days (5.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1473 AU.
Transit Fingerprint
Depth
0.065 %
Duration
4.766 h
Impact parameter b
0.721
Rp / R★
0.024178
Transit midpoint (BJD)
2,454,967.3056
Photometric dip
Transit produces a flux drop of 650 ppm lasting ≈ 4.77 h.
Extended Orbital Architecture
Planet / star radius ratio
0.024178
Semi-major axis / stellar radius
20.400
Impact parameter (b)
0.721
Transit mid-time (BJD)
2,454,967.3056
Angular separation (arcsec)
0.17100
Eq. Temperature
908K
(635 °C)
Insolation (S⊕)
82.83
Earth = 1.00
Earth Similarity (ESI)
0.254
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
Morton et al. 2016Instrument
Kepler CCD Array
Publication
2016-05
Observation locale
Space
Discovery cohort
Planets confirmed in 2016 at Kepler (12 shown).
Host System: Kepler-1641
Spectral Class
F-type yellow-white
Effective Temperature
6,152 K — hotter than the Sun (5,778 K)
Estimated Age
3.02 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.190 R☉
Stellar Mass
1.120 M☉
Metallicity [Fe/H]
-0.02
Extended Stellar Properties
Surface gravity (log g)
4.340 dex
Stellar density
1.398 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.134 mas
Total Proper Motion
3.120 mas/yr
PM Right Ascension
2.97 mas/yr
PM Declination
-0.94 mas/yr
Galactic Cartesian (pc)
x = 0.332 · y = -0.670 · z = 0.664
Equatorial (J2000)
RA 296.35946° · Dec 41.57453°
Galactic ℓ, b
75.588° · 8.462°
Ecliptic λ, β
313.413° · 61.101°
HTM-20 index
-1045181164
Similar Worlds
HD 28109 d
Sub-Neptune · F-type yellow-white
Radius 3.11 R⊕ · 455.3 ly
Kepler-350 c
Sub-Neptune · F-type yellow-white
Radius 3.10 R⊕ · 3,120.9 ly
Kepler-279 d
Sub-Neptune · F-type yellow-white
Radius 3.10 R⊕ · 3,383.5 ly
Kepler-175 c
Sub-Neptune · F-type yellow-white
Radius 3.10 R⊕ · 4,280.3 ly
Kepler-1896 b
Sub-Neptune · F-type yellow-white
Radius 3.10 R⊕ · 5,652.0 ly
Kepler-1734 b
Sub-Neptune · F-type yellow-white
Radius 3.09 R⊕ · 4,836.3 ly