Key parameters at a glance
- A radius of 2.23 Earth radii
- A mass of 5.60 Earth masses
- Surface gravity around 1.13 g
- An orbital period of 5.756 days
- Semi-major axis 0.0583 AU
- Equilibrium temperature 773 K (500 °C)
- Distance from Earth 997.36 light-years
- Earth Similarity Index 0.342
- Travel time at Voyager 1 speed 17,588,424 years
- Almost certainly tidally locked to its host star given the close orbit
Kepler-1782 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1637of 1978
top 82.7%
This planet
2.23R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-1782 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.23 | 11.21 |
| Mass (M⊕) | 1.00 | 5.60 | 317.83 |
| Density (g/cm³) | 5.51 | 2.78 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.13 | 2.53 |
| Insolation (S⊕) | 1.00 | 86.00 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 123202646
Gaia DR2
Gaia DR2 2117335077826003840
Gaia DR3
Gaia DR3 2117335077826003840
System
Kepler-1782
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 5.76 Earth days (1.6% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0583 AU.
Transit Fingerprint
Depth
0.063 %
Duration
1.071 h
Impact parameter b
0.927
Rp / R★
0.027905
Transit midpoint (BJD)
2,454,966.9037
Photometric dip
Transit produces a flux drop of 631 ppm lasting ≈ 1.07 h.
Extended Orbital Architecture
Planet / star radius ratio
0.027905
Semi-major axis / stellar radius
17.010
Impact parameter (b)
0.927
Transit mid-time (BJD)
2,454,966.9037
Angular separation (arcsec)
0.19000
Eq. Temperature
773K
(500 °C)
Insolation (S⊕)
86.00
Earth = 1.00
Earth Similarity (ESI)
0.342
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-1782
Spectral Class
K-type orange
Effective Temperature
4,931 K — cooler than the Sun (5,778 K)
Estimated Age
2.88 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.734 R☉
Stellar Mass
0.794 M☉
Metallicity [Fe/H]
0.00
Extended Stellar Properties
Surface gravity (log g)
4.605 dex
Stellar density
5.499 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
3.241 mas
Total Proper Motion
24.923 mas/yr
PM Right Ascension
3.25 mas/yr
PM Declination
-24.71 mas/yr
Galactic Cartesian (pc)
x = 0.136 · y = -0.705 · z = 0.696
Equatorial (J2000)
RA 280.92616° · Dec 44.08780°
Galactic ℓ, b
73.203° · 19.805°
Ecliptic λ, β
290.183° · 66.763°
HTM-20 index
-94443198
Similar Worlds
K2-17 b
Sub-Neptune · K-type orange
Radius 2.23 R⊕ · 408.0 ly
K2-268 f
Sub-Neptune · K-type orange
Radius 2.23 R⊕ · 1,069.1 ly
TOI-1346 c
Sub-Neptune · K-type orange
Radius 2.23 R⊕ · 376.5 ly
Kepler-1753 b
Sub-Neptune · K-type orange
Radius 2.23 R⊕ · 2,308.2 ly
TOI-1453 c
Sub-Neptune · K-type orange
Radius 2.22 R⊕ · 256.8 ly
Kepler-1701 b
Sub-Neptune · K-type orange
Radius 2.22 R⊕ · 1,905.2 ly