Key parameters at a glance
- A radius of 1.83 Earth radii
- A mass of 4.00 Earth masses
- Surface gravity around 1.20 g
- An orbital period of 13.063 days
- Semi-major axis 0.0938 AU
- Equilibrium temperature 527 K (254 °C)
- Distance from Earth 1,373.61 light-years
- Earth Similarity Index 0.530
- Travel time at Voyager 1 speed 24,223,655 years
- Almost certainly tidally locked to its host star given the close orbit
Kepler-1938 b Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#232of 1176
top 19.6%
This planet
1.83R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | Kepler-1938 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.83 | 11.21 |
| Mass (M⊕) | 1.00 | 4.00 | 317.83 |
| Density (g/cm³) | 5.51 | 3.60 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.20 | 2.53 |
| Insolation (S⊕) | 1.00 | 18.25 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 171972797
Gaia DR2
Gaia DR2 2075121459200474880
Gaia DR3
Gaia DR3 2075121459200474880
System
Kepler-1938
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 13.06 Earth days (3.6% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0938 AU.
Transit Fingerprint
Depth
0.046 %
Duration
3.244 h
Impact parameter b
0.306
Rp / R★
0.019052
Transit midpoint (BJD)
2,454,977.1843
Photometric dip
Transit produces a flux drop of 464 ppm lasting ≈ 3.24 h.
Extended Orbital Architecture
Planet / star radius ratio
0.019052
Semi-major axis / stellar radius
31.110
Impact parameter (b)
0.306
Transit mid-time (BJD)
2,454,977.1843
Angular separation (arcsec)
0.22300
Eq. Temperature
527K
(254 °C)
Insolation (S⊕)
18.25
Earth = 1.00
Earth Similarity (ESI)
0.530
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
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-1938
Spectral Class
K-type orange
Effective Temperature
4,522 K — cooler than the Sun (5,778 K)
Estimated Age
—
Stellar Radius
0.655 R☉
Stellar Mass
0.646 M☉
Metallicity [Fe/H]
-0.22
Extended Stellar Properties
Surface gravity (log g)
4.615 dex
Stellar density
3.337 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
2.346 mas
Total Proper Motion
2.753 mas/yr
PM Right Ascension
2.08 mas/yr
PM Declination
-1.81 mas/yr
Galactic Cartesian (pc)
x = 0.369 · y = -0.656 · z = 0.659
Equatorial (J2000)
RA 299.35189° · Dec 41.19573°
Galactic ℓ, b
76.386° · 6.327°
Ecliptic λ, β
317.346° · 59.902°
HTM-20 index
-262646000
Similar Worlds
HIP 113103 b
Super-Earth · K-type orange
Radius 1.83 R⊕ · 150.7 ly
Kepler-1089 b
Super-Earth · K-type orange
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TOI-2068 b
Super-Earth · K-type orange
Radius 1.82 R⊕ · 172.6 ly
Kepler-1413 b
Super-Earth · K-type orange
Radius 1.82 R⊕ · 3,807.8 ly
Kepler-331 b
Super-Earth · K-type orange
Radius 1.82 R⊕ · 1,892.1 ly
Kepler-2001 c
Super-Earth · K-type orange
Radius 1.82 R⊕ · 2,532.8 ly