Key parameters at a glance
- A radius of 1.90 Earth radii
- A mass of 4.27 Earth masses
- Surface gravity around 1.18 g
- An orbital period of 1.609 days
- Semi-major axis 0.0228 AU
- Equilibrium temperature 958 K (685 °C)
- Distance from Earth 1,772.48 light-years
- Earth Similarity Index 0.289
- Travel time at Voyager 1 speed 31,257,599 years
- Almost certainly tidally locked to its host star given the close orbit
2 siblings around Kepler-1669
Kepler-1669 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-1669 c this | Super-Earth | 1.90 | 4.27 | 1.609 | 958 | 2021 |
| Kepler-1669 d | Rocky Terrestrial | 1.22 | 1.98 | 4.729 | 669 | 2023 |
| Kepler-1669 b | Sub-Neptune | 2.78 | 8.15 | 9.512 | 530 | 2020 |
Kepler-1669 c Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#124of 1176
top 10.5%
This planet
1.90R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | Kepler-1669 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.90 | 11.21 |
| Mass (M⊕) | 1.00 | 4.27 | 317.83 |
| Density (g/cm³) | 5.51 | 3.41 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.18 | 2.53 |
| Insolation (S⊕) | 1.00 | 199.28 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 169457234
Gaia DR2
Gaia DR2 2073652546016392448
Gaia DR3
Gaia DR3 2073652546016392448
System
Kepler-1669
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 1.61 Earth days (0.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0228 AU.
Transit Fingerprint
Depth
0.073 %
Duration
1.568 h
Impact parameter b
0.104
Rp / R★
0.029533
Transit midpoint (BJD)
2,455,011.9456
Photometric dip
Transit produces a flux drop of 729 ppm lasting ≈ 1.57 h.
Extended Orbital Architecture
Planet / star radius ratio
0.029533
Semi-major axis / stellar radius
8.056
Impact parameter (b)
0.104
Transit mid-time (BJD)
2,455,011.9456
Angular separation (arcsec)
0.04200
Eq. Temperature
958K
(685 °C)
Insolation (S⊕)
199.28
Earth = 1.00
Earth Similarity (ESI)
0.289
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
Valizadegan et al. 2022Instrument
Kepler CCD Array
Publication
2022-02
Observation locale
Space
Discovery cohort
Planets confirmed in 2021 at Kepler (12 shown).
Host System: Kepler-1669
Spectral Class
K-type orange
Effective Temperature
4,224 K — cooler than the Sun (5,778 K)
Estimated Age
13.90 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.603 R☉
Stellar Mass
0.609 M☉
Metallicity [Fe/H]
-0.20
Extended Stellar Properties
Surface gravity (log g)
4.662 dex
Stellar density
3.541 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.812 mas
Total Proper Motion
5.492 mas/yr
PM Right Ascension
1.48 mas/yr
PM Declination
5.29 mas/yr
Galactic Cartesian (pc)
x = 0.354 · y = -0.681 · z = 0.641
Equatorial (J2000)
RA 297.43038° · Dec 39.84788°
Galactic ℓ, b
74.472° · 6.908°
Ecliptic λ, β
313.679° · 59.197°
HTM-20 index
-1745764231
Similar Worlds
K2-155 d
Super-Earth · K-type orange
Radius 1.90 R⊕ · 237.4 ly
Kepler-158 c
Super-Earth · K-type orange
Radius 1.90 R⊕ · 1,028.0 ly
Kepler-601 b
Super-Earth · K-type orange
Radius 1.90 R⊕ · 1,353.0 ly
Kepler-196 b
Super-Earth · K-type orange
Radius 1.90 R⊕ · 1,472.0 ly
TOI-5789 d
Super-Earth · K-type orange
Radius 1.91 R⊕ · 66.7 ly
Kepler-753 b
Super-Earth · K-type orange
Radius 1.91 R⊕ · 896.2 ly