Key parameters at a glance
- A radius of 5.44 Earth radii
- A mass of 15.00 Earth masses
- Surface gravity around 0.51 g
- An orbital period of 284.215 days
- Semi-major axis 0.8670 AU
- Equilibrium temperature 321 K (48 °C)
- Distance from Earth 2,823.63 light-years
- Earth Similarity Index 0.463
- Travel time at Voyager 1 speed 49,794,718 years
1 sibling around KOI-1783
KOI-1783.02 shares its host star with 1 other confirmed planet. Side-by-side measurements below.
| Planet | Type | Radius (R⊕) | Mass (M⊕) | Period (d) | Eq. T (K) | Year |
|---|---|---|---|---|---|---|
| KOI-1783.01 | Neptune-like | 8.86 | 71.00 | 134.463 | 412 | 2020 |
| KOI-1783.02 this | Neptune-like | 5.44 | 15.00 | 284.215 | 321 | 2020 |
KOI-1783.02 Planet Profile
Physical Specs
Classification
Planet Type
Neptune-like
Discovery
Size rank in cohort
Rank by radius
#322of 574
top 55.9%
This planet
5.44R⊕
Neptune-like median
6.39R⊕
Nearest-size peers
| Metric | Earth | KOI-1783.02 | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 5.44 | 11.21 |
| Mass (M⊕) | 1.00 | 15.00 | 317.83 |
| Density (g/cm³) | 5.51 | 0.51 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.51 | 2.53 |
| Insolation (S⊕) | 1.00 | 2.49 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 15.000 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 159051209
Gaia DR2
Gaia DR2 2127790368255394048
Gaia DR3
Gaia DR3 2127790368255394048
System
KOI-1783
Percentile among Neptune-like cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 284.22 Earth days (77.8% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.8669 AU.
Transit Fingerprint
Depth
0.165 %
Duration
7.793 h
Impact parameter b
0.888
Rp / R★
0.046340
Transit midpoint (BJD)
2,455,033.8394
Photometric dip
Transit produces a flux drop of 1,650 ppm lasting ≈ 7.79 h.
Extended Orbital Architecture
Planet / star radius ratio
0.046340
Semi-major axis / stellar radius
143.400
Impact parameter (b)
0.888
Transit mid-time (BJD)
2,455,033.8394
Angular separation (arcsec)
1.00000
Eq. Temperature
321K
(48 °C)
Insolation (S⊕)
2.49
Earth = 1.00
Earth Similarity (ESI)
0.463
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
Vissapragada et al. 2020Instrument
Kepler CCD Array
Publication
2020-03
Observation locale
Space
Discovery cohort
Planets confirmed in 2020 at Kepler (12 shown).
Host System: KOI-1783
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,922 K — hotter than the Sun (5,778 K)
Estimated Age
0.20 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.143 R☉
Stellar Mass
1.076 M☉
Metallicity [Fe/H]
0.11
Extended Stellar Properties
Surface gravity (log g)
4.300 dex
Stellar density
0.730 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.126 mas
Total Proper Motion
18.018 mas/yr
PM Right Ascension
2.65 mas/yr
PM Declination
-17.82 mas/yr
Galactic Cartesian (pc)
x = 0.226 · y = -0.644 · z = 0.731
Equatorial (J2000)
RA 289.34146° · Dec 46.98816°
Galactic ℓ, b
78.272° · 15.360°
Ecliptic λ, β
307.009° · 67.957°
HTM-20 index
1831449784
Similar Worlds
HD 105618 b
Neptune-like · G-type yellow (Sun-like)
Radius 5.44 R⊕ · 228.6 ly
HD 190360 c
Neptune-like · G-type yellow (Sun-like)
Radius 5.44 R⊕ · 52.2 ly
Kepler-103 c
Neptune-like · G-type yellow (Sun-like)
Radius 5.45 R⊕ · 1,613.9 ly
K2-24 b
Neptune-like · G-type yellow (Sun-like)
Radius 5.40 R⊕ · 556.3 ly
Kepler-18 c
Neptune-like · G-type yellow (Sun-like)
Radius 5.49 R⊕ · 1,412.4 ly
HD 10180 e
Neptune-like · G-type yellow (Sun-like)
Radius 5.39 R⊕ · 127.1 ly