Key parameters at a glance
- A radius of 1.68 Earth radii
- A mass of 3.46 Earth masses
- Surface gravity around 1.23 g
- An orbital period of 2.613 days
- Semi-major axis 0.0298 AU
- Equilibrium temperature 713 K (440 °C)
- Distance from Earth 1,408.26 light-years
- Earth Similarity Index 0.409
- Travel time at Voyager 1 speed 24,834,722 years
- Almost certainly tidally locked to its host star given the close orbit
Kepler-844 b Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#435of 1176
top 36.9%
This planet
1.68R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | Kepler-844 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.68 | 11.21 |
| Mass (M⊕) | 1.00 | 3.46 | 317.83 |
| Density (g/cm³) | 5.51 | 4.01 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.23 | 2.53 |
| Insolation (S⊕) | 1.00 | 89.65 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 298836607
Gaia DR2
Gaia DR2 2131232114526859520
Gaia DR3
Gaia DR3 2131232114526859520
System
Kepler-844
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 2.61 Earth days (0.7% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0298 AU.
Transit Fingerprint
Depth
0.060 %
Duration
1.930 h
Impact parameter b
0.855
Rp / R★
0.027045
Transit midpoint (BJD)
2,454,966.1123
Photometric dip
Transit produces a flux drop of 600 ppm lasting ≈ 1.93 h.
Extended Orbital Architecture
Planet / star radius ratio
0.027045
Semi-major axis / stellar radius
5.280
Impact parameter (b)
0.855
Transit mid-time (BJD)
2,454,966.1123
Angular separation (arcsec)
0.06900
Eq. Temperature
713K
(440 °C)
Insolation (S⊕)
89.65
Earth = 1.00
Earth Similarity (ESI)
0.409
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
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-844
Spectral Class
K-type orange
Effective Temperature
4,128 K — cooler than the Sun (5,778 K)
Estimated Age
3.80 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.570 R☉
Stellar Mass
0.590 M☉
Metallicity [Fe/H]
-0.24
Extended Stellar Properties
Surface gravity (log g)
4.700 dex
Stellar density
0.585 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
2.288 mas
Total Proper Motion
30.842 mas/yr
PM Right Ascension
16.50 mas/yr
PM Declination
-26.06 mas/yr
Galactic Cartesian (pc)
x = 0.202 · y = -0.627 · z = 0.752
Equatorial (J2000)
RA 287.85785° · Dec 48.77396°
Galactic ℓ, b
79.585° · 16.969°
Ecliptic λ, β
306.175° · 69.979°
HTM-20 index
770322703
Similar Worlds
Kepler-778 b
Super-Earth · K-type orange
Radius 1.68 R⊕ · 3,059.9 ly
TOI-2411 b
Super-Earth · K-type orange
Radius 1.68 R⊕ · 194.2 ly
Kepler-1266 c
Super-Earth · K-type orange
Radius 1.68 R⊕ · 2,770.1 ly
Kepler-167 c
Super-Earth · K-type orange
Radius 1.67 R⊕ · 1,115.2 ly
K2-381 d
Super-Earth · K-type orange
Radius 1.69 R⊕ · 475.2 ly
Kepler-1802 b
Super-Earth · K-type orange
Radius 1.67 R⊕ · 2,076.6 ly