Key parameters at a glance
- A radius of 2.25 Earth radii
- A mass of 5.69 Earth masses
- Surface gravity around 1.12 g
- An orbital period of 14.589 days
- Semi-major axis 0.1100 AU
- Equilibrium temperature 594 K (321 °C)
- Distance from Earth 2,265.57 light-years
- Earth Similarity Index 0.441
- 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 b 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 this | Sub-Neptune | 2.25 | 5.69 | 14.589 | 594 | 2014 |
| Kepler-290 c | Sub-Neptune | 2.70 | 7.75 | 36.770 | 437 | 2014 |
Kepler-290 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1589of 1978
top 80.3%
This planet
2.25R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-290 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.25 | 11.21 |
| Mass (M⊕) | 1.00 | 5.69 | 317.83 |
| Density (g/cm³) | 5.51 | 2.74 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.12 | 2.53 |
| Insolation (S⊕) | 1.00 | 22.64 | 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 14.59 Earth days (4.0% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1100 AU.
Transit Fingerprint
Depth
0.083 %
Duration
2.404 h
Impact parameter b
0.600
Rp / R★
0.026295
Transit midpoint (BJD)
2,454,974.9341
Photometric dip
Transit produces a flux drop of 831 ppm lasting ≈ 2.40 h.
Extended Orbital Architecture
Planet / star radius ratio
0.026295
Semi-major axis / stellar radius
47.440
Impact parameter (b)
0.600
Transit mid-time (BJD)
2,454,974.9341
Angular separation (arcsec)
0.15800
Eq. Temperature
594K
(321 °C)
Insolation (S⊕)
22.64
Earth = 1.00
Earth Similarity (ESI)
0.441
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
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Kepler-567 b
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Kepler-1996 b
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Radius 2.26 R⊕ · 2,427.6 ly