Key parameters at a glance
- A radius of 2.44 Earth radii
- A mass of 6.52 Earth masses
- Surface gravity around 1.10 g
- An orbital period of 11.606 days
- Semi-major axis 0.0885 AU
- Equilibrium temperature 584 K (311 °C)
- Distance from Earth 2,318.07 light-years
- Earth Similarity Index 0.435
- Travel time at Voyager 1 speed 40,879,144 years
- Almost certainly tidally locked to its host star given the close orbit
Kepler-1845 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1276of 1978
top 64.5%
This planet
2.44R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-1845 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.44 | 11.21 |
| Mass (M⊕) | 1.00 | 6.52 | 317.83 |
| Density (g/cm³) | 5.51 | 2.47 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.10 | 2.53 |
| Insolation (S⊕) | 1.00 | 27.47 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 137892408
Gaia DR2
Gaia DR2 2052257355406092160
Gaia DR3
Gaia DR3 2052257355406092160
System
Kepler-1845
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 11.61 Earth days (3.2% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0885 AU.
Transit Fingerprint
Depth
0.077 %
Duration
2.229 h
Impact parameter b
0.382
Rp / R★
0.024534
Transit midpoint (BJD)
2,454,967.4146
Photometric dip
Transit produces a flux drop of 772 ppm lasting ≈ 2.23 h.
Extended Orbital Architecture
Planet / star radius ratio
0.024534
Semi-major axis / stellar radius
41.390
Impact parameter (b)
0.382
Transit mid-time (BJD)
2,454,967.4146
Angular separation (arcsec)
0.12500
Eq. Temperature
584K
(311 °C)
Insolation (S⊕)
27.47
Earth = 1.00
Earth Similarity (ESI)
0.435
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
Valizadegan et al. 2022Instrument
Kepler CCD Array
Publication
2022-02
Observation locale
Space
Discovery cohort
Planets confirmed in 2021 at Kepler (12 shown).
Host System: Kepler-1845
Spectral Class
K-type orange
Effective Temperature
4,703 K — cooler than the Sun (5,778 K)
Estimated Age
1.00 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.701 R☉
Stellar Mass
0.686 M☉
Metallicity [Fe/H]
-0.14
Extended Stellar Properties
Surface gravity (log g)
4.582 dex
Stellar density
9.959 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.379 mas
Total Proper Motion
12.875 mas/yr
PM Right Ascension
6.02 mas/yr
PM Declination
-11.38 mas/yr
Galactic Cartesian (pc)
x = 0.305 · y = -0.723 · z = 0.620
Equatorial (J2000)
RA 292.90162° · Dec 38.29703°
Galactic ℓ, b
71.398° · 9.253°
Ecliptic λ, β
306.230° · 58.889°
HTM-20 index
1319164120
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