Key parameters at a glance
- A radius of 4.15 Earth radii
- A mass of 16.10 Earth masses
- Surface gravity around 0.93 g
- An orbital period of 26.657 days
- Semi-major axis 0.1943 AU
- Equilibrium temperature 903 K (630 °C)
- Distance from Earth 3,365.64 light-years
- Earth Similarity Index 0.226
- Travel time at Voyager 1 speed 59,352,994 years
- Almost certainly tidally locked to its host star given the close orbit
Kepler-1993 b Planet Profile
Physical Specs
Classification
Planet Type
Neptune-like
Discovery
Size rank in cohort
Rank by radius
#531of 574
top 92.3%
This planet
4.15R⊕
Neptune-like median
6.39R⊕
Nearest-size peers
| Metric | Earth | Kepler-1993 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 4.15 | 11.21 |
| Mass (M⊕) | 1.00 | 16.10 | 317.83 |
| Density (g/cm³) | 5.51 | 1.24 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.93 | 2.53 |
| Insolation (S⊕) | 1.00 | 157.45 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 270700335
Gaia DR2
Gaia DR2 2127956360152391168
Gaia DR3
Gaia DR3 2127956360152391168
System
Kepler-1993
Percentile among Neptune-like cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 26.66 Earth days (7.3% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1943 AU.
Transit Fingerprint
Depth
0.016 %
Duration
4.954 h
Impact parameter b
0.686
Rp / R★
0.012413
Transit midpoint (BJD)
2,454,964.5943
Photometric dip
Transit produces a flux drop of 163 ppm lasting ≈ 4.95 h.
Extended Orbital Architecture
Planet / star radius ratio
0.012413
Semi-major axis / stellar radius
30.600
Impact parameter (b)
0.686
Transit mid-time (BJD)
2,454,964.5943
Angular separation (arcsec)
0.18800
Eq. Temperature
903K
(630 °C)
Insolation (S⊕)
157.45
Earth = 1.00
Earth Similarity (ESI)
0.226
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. 2023Instrument
Kepler CCD Array
Publication
2023-05
Observation locale
Space
Discovery cohort
Planets confirmed in 2023 at Kepler (12 shown).
Host System: Kepler-1993
Spectral Class
K-type orange
Effective Temperature
5,159 K — cooler than the Sun (5,778 K)
Estimated Age
4.68 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
3.062 R☉
Stellar Mass
1.373 M☉
Metallicity [Fe/H]
-0.04
Extended Stellar Properties
Surface gravity (log g)
3.604 dex
Stellar density
0.764 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
0.940 mas
Total Proper Motion
1.376 mas/yr
PM Right Ascension
-0.83 mas/yr
PM Declination
1.10 mas/yr
Galactic Cartesian (pc)
x = 0.285 · y = -0.645 · z = 0.709
Equatorial (J2000)
RA 293.79685° · Dec 45.16073°
Galactic ℓ, b
77.922° · 11.786°
Ecliptic λ, β
312.553° · 65.123°
HTM-20 index
-1658721347
Similar Worlds
TOI-1272 b
Neptune-like · K-type orange
Radius 4.13 R⊕ · 448.7 ly
HD 77338 b
Neptune-like · K-type orange
Radius 4.12 R⊕ · 149.8 ly
Kepler-815 b
Neptune-like · K-type orange
Radius 4.11 R⊕ · 4,107.2 ly
KMT-2023-BLG-1896L b
Neptune-like · K-type orange
Radius 4.19 R⊕ · 17,906.0 ly
Kepler-247 c
Neptune-like · K-type orange
Radius 4.09 R⊕ · 2,164.7 ly
Kepler-248 c
Neptune-like · K-type orange
Radius 4.07 R⊕ · 2,409.6 ly