Key parameters at a glance
- A radius of 3.52 Earth radii
- A mass of 12.20 Earth masses
- Surface gravity around 0.98 g
- An orbital period of 1.921 days
- Semi-major axis 0.0291 AU
- Equilibrium temperature 1,186 K (913 °C)
- Distance from Earth 1,314.13 light-years
- Earth Similarity Index 0.181
- Travel time at Voyager 1 speed 23,174,707 years
- Almost certainly tidally locked to its host star given the close orbit
K2-283 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#169of 1978
top 8.5%
This planet
3.52R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | K2-283 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 3.52 | 11.21 |
| Mass (M⊕) | 1.00 | 12.20 | 317.83 |
| Density (g/cm³) | 5.51 | 1.54 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.98 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Star Catalogue Identifiers
TIC
TIC 266017624
Gaia DR2
Gaia DR2 2581916673708201216
Gaia DR3
Gaia DR3 2581916673708201216
System
K2-283
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 1.92 Earth days (0.5% of a terrestrial year) at a mean orbital distance of 0.0291 AU.
Transit Fingerprint
Depth
0.197 %
Duration
1.750 h
Impact parameter b
0.370
Rp / R★
0.039300
Transit midpoint (BJD)
2,457,394.9090
Photometric dip
Transit produces a flux drop of 1,967 ppm lasting ≈ 1.75 h.
Extended Orbital Architecture
Planet / star radius ratio
0.039300
Semi-major axis / stellar radius
8.230
Impact parameter (b)
0.370
Transit mid-time (BJD)
2,457,394.9090
Angular separation (arcsec)
0.07220
Eq. Temperature
1,186K
(913 °C)
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.181
0 = alien, 1 = Earth-identical
Insufficient insolation data — the dayside is scorched. Close-orbiting tidally-locked around a cool host.
Discovery Paper
Primary reference
Livingston et al. 2018Instrument
Kepler CCD Array
Publication
2018-12
Observation locale
Space
Discovery cohort
Planets confirmed in 2018 at K2 (12 shown).
Host System: K2-283
Spectral Class
K-type orange
Effective Temperature
5,060 K — cooler than the Sun (5,778 K)
Estimated Age
—
Stellar Radius
0.820 R☉
Stellar Mass
0.890 M☉
Metallicity [Fe/H]
0.28
Extended Stellar Properties
Surface gravity (log g)
4.560 dex
Stellar density
2.861 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 17 bands
Astrometric Data
Parallax
2.453 mas
Total Proper Motion
11.110 mas/yr
PM Right Ascension
-10.97 mas/yr
PM Declination
-1.74 mas/yr
Galactic Cartesian (pc)
x = 0.960 · y = 0.225 · z = 0.168
Equatorial (J2000)
RA 13.19437° · Dec 9.69292°
Galactic ℓ, b
123.483° · -53.177°
Ecliptic λ, β
15.898° · 3.725°
HTM-20 index
609813555
Similar Worlds
Kepler-687 b
Sub-Neptune · K-type orange
Radius 3.52 R⊕ · 2,066.7 ly
TOI-1246 e
Sub-Neptune · K-type orange
Radius 3.51 R⊕ · 552.6 ly
K2-285 c
Sub-Neptune · K-type orange
Radius 3.53 R⊕ · 505.4 ly
TOI-2076 c
Sub-Neptune · K-type orange
Radius 3.54 R⊕ · 136.7 ly
TOI-5076 b
Sub-Neptune · K-type orange
Radius 3.49 R⊕ · 270.2 ly
KOBE-1 c
Sub-Neptune · K-type orange
Radius 3.56 R⊕ · 78.2 ly