Key parameters at a glance
- A radius of 2.15 Earth radii
- A mass of 5.29 Earth masses
- Surface gravity around 1.14 g
- An orbital period of 6.460 days
- Semi-major axis 0.0652 AU
- Equilibrium temperature 883 K (610 °C)
- Distance from Earth 4,404.15 light-years
- Earth Similarity Index 0.302
- Travel time at Voyager 1 speed 77,667,176 years
1 sibling around Kepler-1322
Kepler-1322 c 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-1322 b | Super-Earth | 1.61 | 3.22 | 0.963 | 1,666 | 2016 |
| Kepler-1322 c this | Sub-Neptune | 2.15 | 5.29 | 6.460 | 883 | 2021 |
Kepler-1322 c Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1740of 1978
top 87.9%
This planet
2.15R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-1322 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.15 | 11.21 |
| Mass (M⊕) | 1.00 | 5.29 | 317.83 |
| Density (g/cm³) | 5.51 | 2.90 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.14 | 2.53 |
| Insolation (S⊕) | 1.00 | 144.06 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 275490412
Gaia DR2
Gaia DR2 2126524001437900928
Gaia DR3
Gaia DR3 2126524001437900928
System
Kepler-1322
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 6.46 Earth days (1.8% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0652 AU.
Transit Fingerprint
Depth
0.039 %
Duration
1.785 h
Impact parameter b
0.111
Rp / R★
0.018766
Transit midpoint (BJD)
2,454,968.9646
Photometric dip
Transit produces a flux drop of 394 ppm lasting ≈ 1.79 h.
Extended Orbital Architecture
Planet / star radius ratio
0.018766
Semi-major axis / stellar radius
28.000
Impact parameter (b)
0.111
Transit mid-time (BJD)
2,454,968.9646
Angular separation (arcsec)
0.04830
Eq. Temperature
883K
(610 °C)
Insolation (S⊕)
144.06
Earth = 1.00
Earth Similarity (ESI)
0.302
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
Valizadegan et al. 2022Instrument
Kepler CCD Array
Publication
2022-02
Observation locale
Space
Discovery cohort
Planets confirmed in 2021 at Kepler (12 shown).
Host System: Kepler-1322
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,704 K — cooler than the Sun (5,778 K)
Estimated Age
0.40 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.804 R☉
Stellar Mass
0.897 M☉
Metallicity [Fe/H]
-0.30
Extended Stellar Properties
Surface gravity (log g)
4.575 dex
Stellar density
1.505 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
0.713 mas
Total Proper Motion
3.779 mas/yr
PM Right Ascension
-0.60 mas/yr
PM Declination
-3.73 mas/yr
Galactic Cartesian (pc)
x = 0.276 · y = -0.645 · z = 0.712
Equatorial (J2000)
RA 293.20450° · Dec 45.43539°
Galactic ℓ, b
77.983° · 12.282°
Ecliptic λ, β
311.879° · 65.535°
HTM-20 index
-1580469352
Similar Worlds
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Sub-Neptune · G-type yellow (Sun-like)
Radius 2.15 R⊕ · 4,417.7 ly
Kepler-256 c
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Kepler-254 c
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HD 86226 c
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Kepler-308 c
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Kepler-1474 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.16 R⊕ · 3,851.6 ly