Key parameters at a glance
- A radius of 2.97 Earth radii
- A mass of 9.11 Earth masses
- Surface gravity around 1.03 g
- An orbital period of 22.086 days
- Semi-major axis 0.1300 AU
- Equilibrium temperature 352 K (79 °C)
- Distance from Earth 1,058.13 light-years
- Earth Similarity Index 0.620
- Travel time at Voyager 1 speed 18,660,035 years
- Almost certainly tidally locked to its host star given the close orbit
Kepler-993 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#546of 1978
top 27.6%
This planet
2.97R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-993 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.97 | 11.21 |
| Mass (M⊕) | 1.00 | 9.11 | 317.83 |
| Density (g/cm³) | 5.51 | 1.91 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.03 | 2.53 |
| Insolation (S⊕) | 1.00 | 3.95 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 63365721
Gaia DR2
Gaia DR2 2126373303927596160
Gaia DR3
Gaia DR3 2126373303927596160
System
Kepler-993
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 22.09 Earth days (6.0% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1300 AU.
Transit Fingerprint
Depth
0.316 %
Duration
2.162 h
Impact parameter b
0.009
Rp / R★
0.049595
Transit midpoint (BJD)
2,454,968.2313
Photometric dip
Transit produces a flux drop of 3,157 ppm lasting ≈ 2.16 h.
Extended Orbital Architecture
Planet / star radius ratio
0.049595
Semi-major axis / stellar radius
81.910
Impact parameter (b)
0.009
Transit mid-time (BJD)
2,454,968.2313
Angular separation (arcsec)
0.40100
Eq. Temperature
352K
(79 °C)
Insolation (S⊕)
3.95
Earth = 1.00
Earth Similarity (ESI)
0.620
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — liquid water is physically possible with adequate atmospheric pressure. 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-993
Spectral Class
K-type orange
Effective Temperature
3,843 K — cooler than the Sun (5,778 K)
Estimated Age
3.89 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.540 R☉
Stellar Mass
0.570 M☉
Metallicity [Fe/H]
0.03
Extended Stellar Properties
Surface gravity (log g)
4.720 dex
Stellar density
4.128 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
3.054 mas
Total Proper Motion
4.998 mas/yr
PM Right Ascension
2.24 mas/yr
PM Declination
4.47 mas/yr
Galactic Cartesian (pc)
x = 0.275 · y = -0.660 · z = 0.700
Equatorial (J2000)
RA 292.61411° · Dec 44.39466°
Galactic ℓ, b
76.839° · 12.196°
Ecliptic λ, β
310.044° · 64.721°
HTM-20 index
-740046819
Similar Worlds
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Sub-Neptune · K-type orange
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Kepler-1728 b
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TOI-2459 b
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K2-270 c
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Kepler-1341 b
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Kepler-735 b
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