Key parameters at a glance
- A radius of 3.21 Earth radii
- A mass of 10.40 Earth masses
- Surface gravity around 1.01 g
- An orbital period of 158.685 days
- Semi-major axis 0.5449 AU
- Equilibrium temperature 350 K (77 °C)
- Distance from Earth 1,457.41 light-years
- Earth Similarity Index 0.603
- Travel time at Voyager 1 speed 25,701,398 years
Kepler-782 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#339of 1978
top 17.1%
This planet
3.21R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-782 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 3.21 | 11.21 |
| Mass (M⊕) | 1.00 | 10.40 | 317.83 |
| Density (g/cm³) | 5.51 | 1.73 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.01 | 2.53 |
| Insolation (S⊕) | 1.00 | 3.99 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 158839841
Gaia DR2
Gaia DR2 2130920471701096576
Gaia DR3
Gaia DR3 2130920471701096576
System
Kepler-782
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 158.69 Earth days (43.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.5449 AU.
Transit Fingerprint
Depth
0.090 %
Duration
11.677 h
Impact parameter b
0.876
Rp / R★
0.028802
Transit midpoint (BJD)
2,455,006.9492
Photometric dip
Transit produces a flux drop of 898 ppm lasting ≈ 11.68 h.
Extended Orbital Architecture
Planet / star radius ratio
0.028802
Semi-major axis / stellar radius
52.800
Impact parameter (b)
0.876
Transit mid-time (BJD)
2,455,006.9492
Angular separation (arcsec)
1.22000
Eq. Temperature
350K
(77 °C)
Insolation (S⊕)
3.99
Earth = 1.00
Earth Similarity (ESI)
0.603
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-782
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,867 K — hotter than the Sun (5,778 K)
Estimated Age
5.25 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
1.010 R☉
Stellar Mass
0.980 M☉
Metallicity [Fe/H]
-0.14
Extended Stellar Properties
Surface gravity (log g)
4.420 dex
Stellar density
0.640 g/cm³
Systemic radial velocity
-67.61 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
2.209 mas
Total Proper Motion
11.884 mas/yr
PM Right Ascension
2.95 mas/yr
PM Declination
11.51 mas/yr
Galactic Cartesian (pc)
x = 0.217 · y = -0.636 · z = 0.740
Equatorial (J2000)
RA 288.86825° · Dec 47.75947°
Galactic ℓ, b
78.877° · 15.959°
Ecliptic λ, β
306.935° · 68.792°
HTM-20 index
-521253879
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K2-172 c
Sub-Neptune · G-type yellow (Sun-like)
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