Key parameters at a glance
- A radius of 2.13 Earth radii
- A mass of 5.18 Earth masses
- Surface gravity around 1.14 g
- An orbital period of 14.282 days
- Semi-major axis 0.0978 AU
- Equilibrium temperature 446 K (173 °C)
- Distance from Earth 928.77 light-years
- Earth Similarity Index 0.582
- Travel time at Voyager 1 speed 16,378,771 years
- Almost certainly tidally locked to its host star given the close orbit
Kepler-622 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1765of 1978
top 89.2%
This planet
2.13R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-622 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.13 | 11.21 |
| Mass (M⊕) | 1.00 | 5.18 | 317.83 |
| Density (g/cm³) | 5.51 | 2.95 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.14 | 2.53 |
| Insolation (S⊕) | 1.00 | 12.49 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 120254625
Gaia DR2
Gaia DR2 2103645814462282752
Gaia DR3
Gaia DR3 2103645814462282752
System
Kepler-622
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 14.28 Earth days (3.9% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0978 AU.
Transit Fingerprint
Depth
0.098 %
Duration
2.740 h
Impact parameter b
0.019
Rp / R★
0.032020
Transit midpoint (BJD)
2,455,013.8473
Photometric dip
Transit produces a flux drop of 983 ppm lasting ≈ 2.74 h.
Extended Orbital Architecture
Planet / star radius ratio
0.032020
Semi-major axis / stellar radius
42.180
Impact parameter (b)
0.019
Transit mid-time (BJD)
2,455,013.8473
Angular separation (arcsec)
0.34300
Eq. Temperature
446K
(173 °C)
Insolation (S⊕)
12.49
Earth = 1.00
Earth Similarity (ESI)
0.582
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-622
Spectral Class
K-type orange
Effective Temperature
4,201 K — cooler than the Sun (5,778 K)
Estimated Age
3.47 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.610 R☉
Stellar Mass
0.640 M☉
Metallicity [Fe/H]
-0.09
Extended Stellar Properties
Surface gravity (log g)
4.670 dex
Stellar density
6.960 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 17 bands
Astrometric Data
Parallax
3.483 mas
Total Proper Motion
15.603 mas/yr
PM Right Ascension
-4.04 mas/yr
PM Declination
15.07 mas/yr
Galactic Cartesian (pc)
x = 0.189 · y = -0.731 · z = 0.655
Equatorial (J2000)
RA 284.47845° · Dec 40.93317°
Galactic ℓ, b
71.065° · 16.246°
Ecliptic λ, β
294.704° · 63.136°
HTM-20 index
1880939359
Similar Worlds
Kepler-1161 b
Sub-Neptune · K-type orange
Radius 2.13 R⊕ · 1,786.4 ly
Kepler-283 b
Sub-Neptune · K-type orange
Radius 2.13 R⊕ · 1,526.7 ly
Kepler-942 b
Sub-Neptune · K-type orange
Radius 2.13 R⊕ · 705.7 ly
HD 40307 f
Sub-Neptune · K-type orange
Radius 2.13 R⊕ · 42.2 ly
Kepler-161 b
Sub-Neptune · K-type orange
Radius 2.12 R⊕ · 1,417.6 ly
HD 39194 d
Sub-Neptune · K-type orange
Radius 2.12 R⊕ · 86.1 ly