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 198.680 days
- Semi-major axis 0.6332 AU
- Equilibrium temperature 297 K (24 °C)
- Distance from Earth 2,800.93 light-years
- Earth Similarity Index 0.782
- Travel time at Voyager 1 speed 49,394,396 years
1 sibling around Kepler-1090
Kepler-1090 b 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-1090 c | Sub-Neptune | 3.29 | 10.90 | 42.427 | 496 | 2021 |
| Kepler-1090 b this | Sub-Neptune | 2.25 | 5.69 | 198.680 | 297 | 2016 |
Kepler-1090 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-1090 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 | 1.83 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 271885110
Gaia DR2
Gaia DR2 2079650828617180288
Gaia DR3
Gaia DR3 2079650828617180288
System
Kepler-1090
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 198.68 Earth days (54.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.6332 AU.
Transit Fingerprint
Depth
0.065 %
Duration
8.287 h
Impact parameter b
0.338
Rp / R★
0.025382
Transit midpoint (BJD)
2,455,103.6691
Photometric dip
Transit produces a flux drop of 645 ppm lasting ≈ 8.29 h.
Extended Orbital Architecture
Planet / star radius ratio
0.025382
Semi-major axis / stellar radius
177.300
Impact parameter (b)
0.338
Transit mid-time (BJD)
2,455,103.6691
Angular separation (arcsec)
0.73700
Eq. Temperature
297K
(24 °C)
Insolation (S⊕)
1.83
Earth = 1.00
Earth Similarity (ESI)
0.782
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — liquid water is physically possible with adequate atmospheric pressure.
Discovery Paper
Primary reference
Morton et al. 2016Instrument
Kepler CCD Array
Publication
2016-05
Observation locale
Space
Discovery cohort
Planets confirmed in 2016 at Kepler (12 shown).
Host System: Kepler-1090
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,321 K — cooler than the Sun (5,778 K)
Estimated Age
4.37 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.820 R☉
Stellar Mass
0.860 M☉
Metallicity [Fe/H]
-0.04
Extended Stellar Properties
Surface gravity (log g)
4.550 dex
Stellar density
1.010 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.137 mas
Total Proper Motion
4.013 mas/yr
PM Right Ascension
3.59 mas/yr
PM Declination
1.79 mas/yr
Galactic Cartesian (pc)
x = 0.309 · y = -0.643 · z = 0.701
Equatorial (J2000)
RA 295.66290° · Dec 44.52582°
Galactic ℓ, b
77.970° · 10.320°
Ecliptic λ, β
314.821° · 64.025°
HTM-20 index
-1130536882
Similar Worlds
Kepler-300 c
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.25 R⊕ · 3,582.7 ly
Kepler-467 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.25 R⊕ · 1,520.8 ly
Kepler-1381 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.25 R⊕ · 3,904.2 ly
Kepler-272 d
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.25 R⊕ · 2,901.5 ly
Kepler-172 d
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.25 R⊕ · 2,702.5 ly
K2-355 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 2.25 R⊕ · 1,632.4 ly