Key parameters at a glance
- A radius of 2.03 Earth radii
- A mass of 4.78 Earth masses
- Surface gravity around 1.16 g
- An orbital period of 29.349 days
- Semi-major axis 0.1715 AU
- Equilibrium temperature 451 K (178 °C)
- Distance from Earth 2,214.94 light-years
- Earth Similarity Index 0.586
- Travel time at Voyager 1 speed 39,060,552 years
- Almost certainly tidally locked to its host star given the close orbit
Kepler-1461 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1915of 1978
top 96.8%
This planet
2.03R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-1461 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.03 | 11.21 |
| Mass (M⊕) | 1.00 | 4.78 | 317.83 |
| Density (g/cm³) | 5.51 | 3.14 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.16 | 2.53 |
| Insolation (S⊕) | 1.00 | 8.88 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 279915288
Gaia DR2
Gaia DR2 2105752581821148544
Gaia DR3
Gaia DR3 2105752581821148544
System
Kepler-1461
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 29.35 Earth days (8.0% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1715 AU.
Transit Fingerprint
Depth
0.066 %
Duration
4.207 h
Impact parameter b
0.434
Rp / R★
0.024865
Transit midpoint (BJD)
2,454,981.4646
Photometric dip
Transit produces a flux drop of 659 ppm lasting ≈ 4.21 h.
Extended Orbital Architecture
Planet / star radius ratio
0.024865
Semi-major axis / stellar radius
36.400
Impact parameter (b)
0.434
Transit mid-time (BJD)
2,454,981.4646
Angular separation (arcsec)
0.25300
Eq. Temperature
451K
(178 °C)
Insolation (S⊕)
8.88
Earth = 1.00
Earth Similarity (ESI)
0.586
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
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-1461
Spectral Class
K-type orange
Effective Temperature
4,919 K — cooler than the Sun (5,778 K)
Estimated Age
3.24 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.740 R☉
Stellar Mass
0.790 M☉
Metallicity [Fe/H]
-0.04
Extended Stellar Properties
Surface gravity (log g)
4.600 dex
Stellar density
2.659 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.444 mas
Total Proper Motion
8.358 mas/yr
PM Right Ascension
7.84 mas/yr
PM Declination
-2.91 mas/yr
Galactic Cartesian (pc)
x = 0.199 · y = -0.701 · z = 0.685
Equatorial (J2000)
RA 285.83051° · Dec 43.19838°
Galactic ℓ, b
73.644° · 16.171°
Ecliptic λ, β
298.177° · 65.096°
HTM-20 index
1177685827
Similar Worlds
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Sub-Neptune · K-type orange
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K2-343 c
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Kepler-845 b
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Kepler-834 b
Sub-Neptune · K-type orange
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K2-62 b
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Kepler-833 b
Sub-Neptune · K-type orange
Radius 2.02 R⊕ · 1,524.4 ly