Key parameters at a glance
- A radius of 2.33 Earth radii
- A mass of 6.04 Earth masses
- Surface gravity around 1.11 g
- An orbital period of 177.669 days
- Semi-major axis 0.4950 AU
- Equilibrium temperature 233 K (-40 °C)
- Distance from Earth 2,616.66 light-years
- Earth Similarity Index 0.675
- Travel time at Voyager 1 speed 46,144,708 years
Context from the literature
Kepler-443b is an exoplanet about 2,540 light-years from Earth. Kepler-443b orbits a K-type star called Kepler-443. It takes 177.6693 days to orbit, with an inclination of 89.94°, a semimajor axis of 0.495 AU, and an eccentricity of at least 0.11.
Excerpted from Wikipedia · full article
Kepler-443 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1451of 1978
top 73.3%
This planet
2.33R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-443 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.33 | 11.21 |
| Mass (M⊕) | 1.00 | 6.04 | 317.83 |
| Density (g/cm³) | 5.51 | 2.62 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.11 | 2.53 |
| Insolation (S⊕) | 1.00 | 0.86 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 299030246
Gaia DR2
Gaia DR2 2132699137916968576
Gaia DR3
Gaia DR3 2132699137916968576
System
Kepler-443
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 177.67 Earth days (48.6% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.4950 AU.
Transit Fingerprint
Depth
0.090 %
Duration
8.950 h
Impact parameter b
0.260
Rp / R★
0.030400
Transit midpoint (BJD)
2,455,630.2460
Photometric dip
Transit produces a flux drop of 901 ppm lasting ≈ 8.95 h.
Extended Orbital Architecture
Planet / star radius ratio
0.030400
Semi-major axis / stellar radius
151.000
Impact parameter (b)
0.260
Transit mid-time (BJD)
2,455,630.2460
Angular separation (arcsec)
0.61700
Eq. Temperature
233K
(-40 °C)
Insolation (S⊕)
0.86
Earth = 1.00
Earth Similarity (ESI)
0.675
0 = alien, 1 = Earth-identical
Within the conservative habitable zone — surface water would be frozen.
Discovery Paper
Primary reference
Torres et al. 2015Instrument
Kepler CCD Array
Publication
2015-02
Observation locale
Space
Discovery cohort
Planets confirmed in 2015 at Kepler (12 shown).
Host System: Kepler-443
Spectral Class
K-type orange
Effective Temperature
4,723 K — cooler than the Sun (5,778 K)
Estimated Age
3.20 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.706 R☉
Stellar Mass
0.738 M☉
Metallicity [Fe/H]
-0.01
Extended Stellar Properties
Surface gravity (log g)
4.614 dex
Stellar density
2.960 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.218 mas
Total Proper Motion
23.846 mas/yr
PM Right Ascension
-12.53 mas/yr
PM Declination
-20.29 mas/yr
Galactic Cartesian (pc)
x = 0.205 · y = -0.610 · z = 0.766
Equatorial (J2000)
RA 288.61048° · Dec 49.96855°
Galactic ℓ, b
80.935° · 16.965°
Ecliptic λ, β
308.862° · 70.906°
HTM-20 index
928671324
Similar Worlds
Kepler-241 b
Sub-Neptune · K-type orange
Radius 2.33 R⊕ · 1,669.9 ly
Kepler-1983 b
Sub-Neptune · K-type orange
Radius 2.33 R⊕ · 1,384.3 ly
Kepler-287 b
Sub-Neptune · K-type orange
Radius 2.33 R⊕ · 2,726.2 ly
Kepler-436 c
Sub-Neptune · K-type orange
Radius 2.33 R⊕ · 1,920.6 ly
Kepler-239 b
Sub-Neptune · K-type orange
Radius 2.33 R⊕ · 2,113.8 ly
Kepler-1802 c
Sub-Neptune · K-type orange
Radius 2.32 R⊕ · 2,076.6 ly