Key parameters at a glance
- A radius of 2.18 Earth radii
- A mass of 5.39 Earth masses
- Surface gravity around 1.13 g
- An orbital period of 21.677 days
- Semi-major axis 0.1408 AU
- Equilibrium temperature 530 K (257 °C)
- Distance from Earth 2,660.25 light-years
- Earth Similarity Index 0.496
- Travel time at Voyager 1 speed 46,913,489 years
- Almost certainly tidally locked to its host star given the close orbit
Kepler-662 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1703of 1978
top 86.0%
This planet
2.18R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-662 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.18 | 11.21 |
| Mass (M⊕) | 1.00 | 5.39 | 317.83 |
| Density (g/cm³) | 5.51 | 2.86 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.13 | 2.53 |
| Insolation (S⊕) | 1.00 | 23.82 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 407002705
Gaia DR2
Gaia DR2 2129398988126072960
Gaia DR3
Gaia DR3 2129398988126072960
System
Kepler-662
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 21.68 Earth days (5.9% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1408 AU.
Transit Fingerprint
Depth
0.086 %
Duration
3.126 h
Impact parameter b
0.895
Rp / R★
0.026825
Transit midpoint (BJD)
2,455,004.5375
Photometric dip
Transit produces a flux drop of 857 ppm lasting ≈ 3.13 h.
Extended Orbital Architecture
Planet / star radius ratio
0.026825
Semi-major axis / stellar radius
54.390
Impact parameter (b)
0.895
Transit mid-time (BJD)
2,455,004.5375
Angular separation (arcsec)
0.17300
Eq. Temperature
530K
(257 °C)
Insolation (S⊕)
23.82
Earth = 1.00
Earth Similarity (ESI)
0.496
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-662
Spectral Class
K-type orange
Effective Temperature
4,897 K — cooler than the Sun (5,778 K)
Estimated Age
3.63 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.740 R☉
Stellar Mass
0.790 M☉
Metallicity [Fe/H]
-0.03
Extended Stellar Properties
Surface gravity (log g)
4.600 dex
Stellar density
6.478 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.198 mas
Total Proper Motion
13.530 mas/yr
PM Right Ascension
-3.19 mas/yr
PM Declination
-13.15 mas/yr
Galactic Cartesian (pc)
x = 0.234 · y = -0.628 · z = 0.742
Equatorial (J2000)
RA 290.46508° · Dec 47.92913°
Galactic ℓ, b
79.482° · 15.044°
Ecliptic λ, β
309.847° · 68.555°
HTM-20 index
-351286178
Similar Worlds
Kepler-113 c
Sub-Neptune · K-type orange
Radius 2.18 R⊕ · 855.7 ly
Kepler-250 d
Sub-Neptune · K-type orange
Radius 2.18 R⊕ · 2,480.7 ly
Kepler-261 b
Sub-Neptune · K-type orange
Radius 2.18 R⊕ · 1,035.5 ly
TOI-238 c
Sub-Neptune · K-type orange
Radius 2.18 R⊕ · 262.7 ly
Kepler-245 c
Sub-Neptune · K-type orange
Radius 2.18 R⊕ · 2,809.9 ly
K2-379 b
Sub-Neptune · K-type orange
Radius 2.18 R⊕ · 594.3 ly