Key parameters at a glance
- A radius of 2.21 Earth radii
- A mass of 5.52 Earth masses
- Surface gravity around 1.13 g
- An orbital period of 56.573 days
- Semi-major axis 0.2633 AU
- Equilibrium temperature 356 K (83 °C)
- Distance from Earth 1,330.74 light-years
- Earth Similarity Index 0.689
- Travel time at Voyager 1 speed 23,467,586 years
Kepler-1874 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1657of 1978
top 83.7%
This planet
2.21R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-1874 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.21 | 11.21 |
| Mass (M⊕) | 1.00 | 5.52 | 317.83 |
| Density (g/cm³) | 5.51 | 2.81 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.13 | 2.53 |
| Insolation (S⊕) | 1.00 | 3.79 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 158219569
Gaia DR2
Gaia DR2 2105697533221828224
Gaia DR3
Gaia DR3 2105697533221828224
System
Kepler-1874
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 56.57 Earth days (15.5% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.2633 AU.
Transit Fingerprint
Depth
0.078 %
Duration
4.188 h
Impact parameter b
0.927
Rp / R★
0.031409
Transit midpoint (BJD)
2,454,979.5798
Photometric dip
Transit produces a flux drop of 783 ppm lasting ≈ 4.19 h.
Extended Orbital Architecture
Planet / star radius ratio
0.031409
Semi-major axis / stellar radius
48.000
Impact parameter (b)
0.927
Transit mid-time (BJD)
2,454,979.5798
Angular separation (arcsec)
0.64500
Eq. Temperature
356K
(83 °C)
Insolation (S⊕)
3.79
Earth = 1.00
Earth Similarity (ESI)
0.689
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
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-1874
Spectral Class
K-type orange
Effective Temperature
4,701 K — cooler than the Sun (5,778 K)
Estimated Age
13.80 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.775 R☉
Stellar Mass
0.758 M☉
Metallicity [Fe/H]
0.24
Extended Stellar Properties
Surface gravity (log g)
4.540 dex
Stellar density
0.485 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Total Proper Motion
29.149 mas/yr
PM Right Ascension
4.73 mas/yr
PM Declination
28.76 mas/yr
Galactic Cartesian (pc)
x = 0.204 · y = -0.694 · z = 0.691
Equatorial (J2000)
RA 286.37182° · Dec 43.69208°
Galactic ℓ, b
74.275° · 15.995°
Ecliptic λ, β
299.395° · 65.469°
HTM-20 index
51384511
Similar Worlds
Kepler-55 c
Sub-Neptune · K-type orange
Radius 2.21 R⊕ · 1,887.8 ly
Kepler-1026 b
Sub-Neptune · K-type orange
Radius 2.21 R⊕ · 1,145.6 ly
K2-275 c
Sub-Neptune · K-type orange
Radius 2.21 R⊕ · 402.6 ly
Kepler-989 b
Sub-Neptune · K-type orange
Radius 2.21 R⊕ · 1,604.6 ly
HD 22496 b
Sub-Neptune · K-type orange
Radius 2.22 R⊕ · 44.3 ly
Kepler-1701 b
Sub-Neptune · K-type orange
Radius 2.22 R⊕ · 1,905.2 ly