Key parameters at a glance
- A radius of 1.92 Earth radii
- A mass of 4.35 Earth masses
- Surface gravity around 1.18 g
- An orbital period of 8.205 days
- Semi-major axis 0.0594 AU
- Equilibrium temperature 635 K (362 °C)
- Distance from Earth 402.53 light-years
- Earth Similarity Index 0.439
- Travel time at Voyager 1 speed 7,098,536 years
- Almost certainly tidally locked to its host star given the close orbit
K2-322 b Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#102of 1176
top 8.6%
This planet
1.92R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | K2-322 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.92 | 11.21 |
| Mass (M⊕) | 1.00 | 4.35 | 317.83 |
| Density (g/cm³) | 5.51 | 3.38 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.18 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Star Catalogue Identifiers
TIC
TIC 277869696
Gaia DR2
Gaia DR2 3860369901894562304
Gaia DR3
Gaia DR3 3860369901894562304
System
K2-322
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 8.21 Earth days (2.2% of a terrestrial year) at a mean orbital distance of 0.0594 AU.
Transit Fingerprint
Depth
0.071 %
Impact parameter b
0.680
Transit midpoint (BJD)
2,457,914.0220
Photometric dip
Transit produces a flux drop of 710 ppm.
Eq. Temperature
635K
(362 °C)
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.439
0 = alien, 1 = Earth-identical
Insufficient insolation data — the surface is too hot to retain surface water. Close-orbiting tidally-locked around a cool host.
Discovery Paper
Primary reference
Castro Gonz Aacute Lez et al. 2020Instrument
Kepler CCD Array
Publication
2020-12
Observation locale
Space
Discovery cohort
Planets confirmed in 2020 at K2 (12 shown).
Host System: K2-322
Spectral Class
K-type orange
Effective Temperature
4,141 K — cooler than the Sun (5,778 K)
Estimated Age
—
Stellar Radius
0.602 R☉
Stellar Mass
0.630 M☉
Metallicity [Fe/H]
—
Extended Stellar Properties
Surface gravity (log g)
4.677 dex
Stellar density
3.579 g/cm³
Systemic radial velocity
4.18 km/s
Multi-band Host Photometry — 17 bands
Astrometric Data
Parallax
8.074 mas
Total Proper Motion
16.516 mas/yr
PM Right Ascension
-16.30 mas/yr
PM Declination
-2.64 mas/yr
Galactic Cartesian (pc)
x = -0.915 · y = 0.395 · z = 0.083
Equatorial (J2000)
RA 156.62270° · Dec 4.76402°
Galactic ℓ, b
239.346° · 48.872°
Ecliptic λ, β
156.597° · -4.651°
HTM-20 index
1213853828
Similar Worlds
K2-339 b
Super-Earth · K-type orange
Radius 1.92 R⊕ · 1,175.3 ly
Kepler-1987 e
Super-Earth · K-type orange
Radius 1.92 R⊕ · 1,942.9 ly
TOI-1467 b
Super-Earth · K-type orange
Radius 1.92 R⊕ · 122.1 ly
HD 3167 d
Super-Earth · K-type orange
Radius 1.92 R⊕ · 154.2 ly
K2-414 c
Super-Earth · K-type orange
Radius 1.93 R⊕ · 848.1 ly
K2-49 b
Super-Earth · K-type orange
Radius 1.93 R⊕ · 1,490.9 ly