Key parameters at a glance
- A radius of 2.04 Earth radii
- A mass of 4.82 Earth masses
- Surface gravity around 1.16 g
- An orbital period of 0.928 days
- Semi-major axis 0.0167 AU
- Equilibrium temperature 1,361 K (1088 °C)
- Distance from Earth 1,405.90 light-years
- Earth Similarity Index 0.191
- Travel time at Voyager 1 speed 24,793,022 years
- Almost certainly tidally locked to its host star given the close orbit
Kepler-845 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1904of 1978
top 96.2%
This planet
2.04R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-845 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.04 | 11.21 |
| Mass (M⊕) | 1.00 | 4.82 | 317.83 |
| Density (g/cm³) | 5.51 | 3.12 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.16 | 2.53 |
| Insolation (S⊕) | 1.00 | 772.50 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 417676802
Gaia DR2
Gaia DR2 2129939398090453504
Gaia DR3
Gaia DR3 2129939398090453504
System
Kepler-845
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts roughly 22.3 hours long on a nearly circular orbit at a mean orbital distance of 0.0167 AU.
Transit Fingerprint
Depth
0.052 %
Duration
1.440 h
Impact parameter b
0.290
Rp / R★
0.024503
Transit midpoint (BJD)
2,454,966.9060
Photometric dip
Transit produces a flux drop of 515 ppm lasting ≈ 1.44 h.
Extended Orbital Architecture
Planet / star radius ratio
0.024503
Semi-major axis / stellar radius
2.940
Impact parameter (b)
0.290
Transit mid-time (BJD)
2,454,966.9060
Angular separation (arcsec)
0.03870
Eq. Temperature
1,361K
(1088 °C)
Insolation (S⊕)
772.50
Earth = 1.00
Earth Similarity (ESI)
0.191
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched. 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-845
Spectral Class
K-type orange
Effective Temperature
4,913 K — cooler than the Sun (5,778 K)
Estimated Age
4.79 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.750 R☉
Stellar Mass
0.790 M☉
Metallicity [Fe/H]
0.01
Extended Stellar Properties
Surface gravity (log g)
4.590 dex
Stellar density
2.210 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
2.291 mas
Total Proper Motion
20.437 mas/yr
PM Right Ascension
10.25 mas/yr
PM Declination
-17.68 mas/yr
Galactic Cartesian (pc)
x = 0.234 · y = -0.610 · z = 0.757
Equatorial (J2000)
RA 290.95764° · Dec 49.20373°
Galactic ℓ, b
80.825° · 15.265°
Ecliptic λ, β
312.093° · 69.598°
HTM-20 index
856783502
Similar Worlds
Kepler-48 d
Sub-Neptune · K-type orange
Radius 2.04 R⊕ · 1,000.4 ly
Kepler-324 e
Sub-Neptune · K-type orange
Radius 2.04 R⊕ · 1,635.9 ly
Wolf 503 b
Sub-Neptune · K-type orange
Radius 2.04 R⊕ · 145.2 ly
TOI-712 b
Sub-Neptune · K-type orange
Radius 2.05 R⊕ · 191.2 ly
Kepler-1461 b
Sub-Neptune · K-type orange
Radius 2.03 R⊕ · 2,214.9 ly
Kepler-161 c
Sub-Neptune · K-type orange
Radius 2.05 R⊕ · 1,417.6 ly