Key parameters at a glance
- A radius of 2.32 Earth radii
- A mass of 6.00 Earth masses
- Surface gravity around 1.11 g
- An orbital period of 33.136 days
- Semi-major axis 0.1748 AU
- Equilibrium temperature 357 K (84 °C)
- Distance from Earth 2,076.62 light-years
- Earth Similarity Index 0.675
- Travel time at Voyager 1 speed 36,621,116 years
- Almost certainly tidally locked to its host star given the close orbit
1 sibling around Kepler-1802
Kepler-1802 c 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 |
|---|---|---|---|---|---|---|
| Kepler-1802 b | Super-Earth | 1.67 | 3.43 | 15.450 | 581 | 2021 |
| Kepler-1802 c this | Sub-Neptune | 2.32 | 6.00 | 33.136 | 357 | 2021 |
Kepler-1802 c Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1467of 1978
top 74.1%
This planet
2.32R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-1802 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.32 | 11.21 |
| Mass (M⊕) | 1.00 | 6.00 | 317.83 |
| Density (g/cm³) | 5.51 | 2.63 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.11 | 2.53 |
| Insolation (S⊕) | 1.00 | 3.86 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 239291510
Gaia DR2
Gaia DR2 2076053604520641024
Gaia DR3
Gaia DR3 2076053604520641024
System
Kepler-1802
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 33.14 Earth days (9.1% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1748 AU.
Transit Fingerprint
Depth
0.083 %
Duration
4.163 h
Impact parameter b
0.444
Rp / R★
0.028324
Transit midpoint (BJD)
2,455,002.5041
Photometric dip
Transit produces a flux drop of 825 ppm lasting ≈ 4.16 h.
Extended Orbital Architecture
Planet / star radius ratio
0.028324
Semi-major axis / stellar radius
59.300
Impact parameter (b)
0.444
Transit mid-time (BJD)
2,455,002.5041
Angular separation (arcsec)
0.27500
Eq. Temperature
357K
(84 °C)
Insolation (S⊕)
3.86
Earth = 1.00
Earth Similarity (ESI)
0.675
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — liquid water is physically possible with adequate atmospheric pressure. 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-1802
Spectral Class
K-type orange
Effective Temperature
4,245 K — cooler than the Sun (5,778 K)
Estimated Age
13.90 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.637 R☉
Stellar Mass
0.649 M☉
Metallicity [Fe/H]
0.00
Extended Stellar Properties
Surface gravity (log g)
4.641 dex
Stellar density
1.107 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 12 bands
Astrometric Data
Parallax
1.554 mas
Total Proper Motion
8.141 mas/yr
PM Right Ascension
-1.54 mas/yr
PM Declination
-7.99 mas/yr
Galactic Cartesian (pc)
x = 0.361 · y = -0.620 · z = 0.696
Equatorial (J2000)
RA 300.24209° · Dec 44.14129°
Galactic ℓ, b
79.269° · 7.282°
Ecliptic λ, β
321.083° · 62.321°
HTM-20 index
-1720396576
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