Key parameters at a glance
- A radius of 1.77 Earth radii
- A mass of 3.78 Earth masses
- Surface gravity around 1.21 g
- An orbital period of 99.253 days
- Semi-major axis 0.3825 AU
- Equilibrium temperature 300 K (27 °C)
- Distance from Earth 1,621.30 light-years
- Earth Similarity Index 0.845
- Travel time at Voyager 1 speed 28,591,600 years
Kepler-1389 b Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#293of 1176
top 24.8%
This planet
1.77R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | Kepler-1389 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.77 | 11.21 |
| Mass (M⊕) | 1.00 | 3.78 | 317.83 |
| Density (g/cm³) | 5.51 | 3.75 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.21 | 2.53 |
| Insolation (S⊕) | 1.00 | 1.87 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 279913347
Gaia DR2
Gaia DR2 2106303505865370752
Gaia DR3
Gaia DR3 2106303505865370752
System
Kepler-1389
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 99.25 Earth days (27.2% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.3825 AU.
Transit Fingerprint
Depth
0.054 %
Duration
6.006 h
Impact parameter b
0.947
Rp / R★
0.021527
Transit midpoint (BJD)
2,454,981.5353
Photometric dip
Transit produces a flux drop of 538 ppm lasting ≈ 6.01 h.
Extended Orbital Architecture
Planet / star radius ratio
0.021527
Semi-major axis / stellar radius
42.100
Impact parameter (b)
0.947
Transit mid-time (BJD)
2,454,981.5353
Angular separation (arcsec)
0.76900
Eq. Temperature
300K
(27 °C)
Insolation (S⊕)
1.87
Earth = 1.00
Earth Similarity (ESI)
0.845
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — liquid water is physically possible with adequate atmospheric pressure.
Detection Signatures
Transit photometry
A transit dip has been observed from at least one telescope.
Transit timing variations
Gravitational interactions from neighbours have been detected.
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-1389
Spectral Class
K-type orange
Effective Temperature
5,078 K — cooler than the Sun (5,778 K)
Estimated Age
2.09 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.740 R☉
Stellar Mass
0.810 M☉
Metallicity [Fe/H]
-0.14
Extended Stellar Properties
Surface gravity (log g)
4.610 dex
Stellar density
2.070 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.983 mas
Total Proper Motion
13.566 mas/yr
PM Right Ascension
1.49 mas/yr
PM Declination
-13.48 mas/yr
Galactic Cartesian (pc)
x = 0.192 · y = -0.684 · z = 0.704
Equatorial (J2000)
RA 285.71744° · Dec 44.75835°
Galactic ℓ, b
75.120° · 16.831°
Ecliptic λ, β
298.994° · 66.622°
HTM-20 index
75876048
Similar Worlds
HD 15337 b
Super-Earth · K-type orange
Radius 1.77 R⊕ · 146.2 ly
Kepler-1465 b
Super-Earth · K-type orange
Radius 1.77 R⊕ · 1,172.5 ly
Kepler-1846 b
Super-Earth · K-type orange
Radius 1.76 R⊕ · 1,221.8 ly
Kepler-1062 b
Super-Earth · K-type orange
Radius 1.76 R⊕ · 1,296.3 ly
Kepler-1814 c
Super-Earth · K-type orange
Radius 1.76 R⊕ · 2,369.0 ly
Kepler-755 b
Super-Earth · K-type orange
Radius 1.76 R⊕ · 1,301.5 ly