Key parameters at a glance
- A radius of 3.27 Earth radii
- A mass of 10.70 Earth masses
- Surface gravity around 1.00 g
- An orbital period of 1.735 days
- Semi-major axis 0.0286 AU
- Equilibrium temperature 1,554 K (1281 °C)
- Distance from Earth 1,280.94 light-years
- Earth Similarity Index 0.136
- Travel time at Voyager 1 speed 22,589,408 years
1 sibling around Kepler-1990
Kepler-1990 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-1990 b this | Sub-Neptune | 3.27 | 10.70 | 1.735 | 1,554 | 2023 |
| Kepler-1990 c | Rocky Terrestrial | 0.98 | 0.90 | 4.068 | 1,170 | 2023 |
Kepler-1990 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#297of 1978
top 15.0%
This planet
3.27R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-1990 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 3.27 | 11.21 |
| Mass (M⊕) | 1.00 | 10.70 | 317.83 |
| Density (g/cm³) | 5.51 | 1.68 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.00 | 2.53 |
| Insolation (S⊕) | 1.00 | 1,372.87 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 269119490
Gaia DR2
Gaia DR2 2076121602454770560
Gaia DR3
Gaia DR3 2076121602454770560
System
Kepler-1990
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 1.74 Earth days (0.5% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0286 AU.
Transit Fingerprint
Depth
0.095 %
Duration
2.274 h
Impact parameter b
0.045
Rp / R★
0.027957
Transit midpoint (BJD)
2,454,968.0600
Photometric dip
Transit produces a flux drop of 953 ppm lasting ≈ 2.27 h.
Extended Orbital Architecture
Planet / star radius ratio
0.027957
Semi-major axis / stellar radius
6.016
Impact parameter (b)
0.045
Transit mid-time (BJD)
2,454,968.0600
Angular separation (arcsec)
0.07280
Eq. Temperature
1,554K
(1281 °C)
Insolation (S⊕)
1,372.87
Earth = 1.00
Earth Similarity (ESI)
0.136
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.
Discovery Paper
Primary reference
Valizadegan et al. 2023Instrument
Kepler CCD Array
Publication
2023-05
Observation locale
Space
Discovery cohort
Planets confirmed in 2023 at Kepler (12 shown).
Host System: Kepler-1990
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,751 K — cooler than the Sun (5,778 K)
Estimated Age
2.50 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.071 R☉
Stellar Mass
1.028 M☉
Metallicity [Fe/H]
0.21
Extended Stellar Properties
Surface gravity (log g)
4.391 dex
Stellar density
1.368 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
2.518 mas
Total Proper Motion
10.845 mas/yr
PM Right Ascension
-3.15 mas/yr
PM Declination
-10.38 mas/yr
Galactic Cartesian (pc)
x = 0.354 · y = -0.620 · z = 0.700
Equatorial (J2000)
RA 299.70474° · Dec 44.43571°
Galactic ℓ, b
79.324° · 7.763°
Ecliptic λ, β
320.605° · 62.753°
HTM-20 index
-1731411218
Similar Worlds
TOI-1117 d
Sub-Neptune · G-type yellow (Sun-like)
Radius 3.27 R⊕ · 546.6 ly
Kepler-576 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 3.27 R⊕ · 2,014.2 ly
TOI-1249 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 3.27 R⊕ · 455.0 ly
Kepler-1085 c
Sub-Neptune · G-type yellow (Sun-like)
Radius 3.27 R⊕ · 4,450.5 ly
Kepler-1530 d
Sub-Neptune · G-type yellow (Sun-like)
Radius 3.28 R⊕ · 1,597.8 ly
Kepler-1097 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 3.26 R⊕ · 2,347.7 ly