Key parameters at a glance
- A radius of 2.70 Earth radii
- A mass of 7.75 Earth masses
- Surface gravity around 1.06 g
- An orbital period of 36.770 days
- Semi-major axis 0.2050 AU
- Equilibrium temperature 437 K (164 °C)
- Distance from Earth 2,265.57 light-years
- Earth Similarity Index 0.541
- Travel time at Voyager 1 speed 39,953,283 years
- Almost certainly tidally locked to its host star given the close orbit
2 siblings around Kepler-290
Kepler-290 c shares its host star with 2 other confirmed planets. Side-by-side measurements below.
| Planet | Type | Radius (R⊕) | Mass (M⊕) | Period (d) | Eq. T (K) | Year |
|---|---|---|---|---|---|---|
| Kepler-290 d | Rocky Terrestrial | 0.86 | 0.57 | 0.764 | 1,589 | 2023 |
| Kepler-290 b | Sub-Neptune | 2.25 | 5.69 | 14.589 | 594 | 2014 |
| Kepler-290 c this | Sub-Neptune | 2.70 | 7.75 | 36.770 | 437 | 2014 |
Kepler-290 c Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#865of 1978
top 43.7%
This planet
2.70R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-290 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.70 | 11.21 |
| Mass (M⊕) | 1.00 | 7.75 | 317.83 |
| Density (g/cm³) | 5.51 | 2.16 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.06 | 2.53 |
| Insolation (S⊕) | 1.00 | 6.60 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 158218214
Gaia DR2
Gaia DR2 2105538623730974848
Gaia DR3
Gaia DR3 2105538623730974848
System
Kepler-290
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 36.77 Earth days (10.1% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.2050 AU.
Transit Fingerprint
Depth
0.135 %
Duration
4.278 h
Impact parameter b
0.220
Rp / R★
0.041465
Transit midpoint (BJD)
2,454,997.2932
Photometric dip
Transit produces a flux drop of 1,347 ppm lasting ≈ 4.28 h.
Extended Orbital Architecture
Planet / star radius ratio
0.041465
Semi-major axis / stellar radius
33.900
Impact parameter (b)
0.220
Transit mid-time (BJD)
2,454,997.2932
Angular separation (arcsec)
0.29500
Eq. Temperature
437K
(164 °C)
Insolation (S⊕)
6.60
Earth = 1.00
Earth Similarity (ESI)
0.541
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
Rowe et al. 2014Instrument
Kepler CCD Array
Publication
2014-03
Observation locale
Space
Discovery cohort
Planets confirmed in 2014 at Kepler (12 shown).
Host System: Kepler-290
Spectral Class
K-type orange
Effective Temperature
5,147 K — cooler than the Sun (5,778 K)
Estimated Age
1.10 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.743 R☉
Stellar Mass
0.756 M☉
Metallicity [Fe/H]
-0.10
Extended Stellar Properties
Surface gravity (log g)
4.622 dex
Stellar density
2.090 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.411 mas
Total Proper Motion
7.358 mas/yr
PM Right Ascension
5.16 mas/yr
PM Declination
-5.25 mas/yr
Galactic Cartesian (pc)
x = 0.208 · y = -0.705 · z = 0.678
Equatorial (J2000)
RA 286.41003° · Dec 42.68151°
Galactic ℓ, b
73.316° · 15.581°
Ecliptic λ, β
298.824° · 64.487°
HTM-20 index
1302520474
Similar Worlds
Kepler-1539 b
Sub-Neptune · K-type orange
Radius 2.70 R⊕ · 2,440.7 ly
TOI-712 c
Sub-Neptune · K-type orange
Radius 2.70 R⊕ · 191.2 ly
TOI-178 d
Sub-Neptune · K-type orange
Radius 2.70 R⊕ · 204.5 ly
TOI-4504 b
Sub-Neptune · K-type orange
Radius 2.69 R⊕ · 1,117.4 ly
Kepler-417 c
Sub-Neptune · K-type orange
Radius 2.69 R⊕ · 3,176.7 ly
EPIC 212737443 c
Sub-Neptune · K-type orange
Radius 2.69 R⊕ · 1,096.7 ly