Key parameters at a glance
- A radius of 1.63 Earth radii
- A mass of 3.28 Earth masses
- Surface gravity around 1.24 g
- An orbital period of 0.559 days
- Semi-major axis 0.0128 AU
- Equilibrium temperature 1,787 K (1514 °C)
- Distance from Earth 2,677.60 light-years
- Earth Similarity Index 0.150
- Travel time at Voyager 1 speed 47,219,482 years
- Almost certainly tidally locked to its host star given the close orbit
Kepler-1873 b Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#530of 1176
top 45.0%
This planet
1.63R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | Kepler-1873 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.63 | 11.21 |
| Mass (M⊕) | 1.00 | 3.28 | 317.83 |
| Density (g/cm³) | 5.51 | 4.19 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.24 | 2.53 |
| Insolation (S⊕) | 1.00 | 2,412.15 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 271164726
Gaia DR2
Gaia DR2 2080062389562356864
Gaia DR3
Gaia DR3 2080062389562356864
System
Kepler-1873
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts roughly 13.4 hours long on a nearly circular orbit at a mean orbital distance of 0.0128 AU.
Transit Fingerprint
Depth
0.028 %
Duration
0.785 h
Impact parameter b
0.307
Rp / R★
0.015407
Transit midpoint (BJD)
2,454,964.5799
Photometric dip
Transit produces a flux drop of 281 ppm lasting ≈ 0.78 h.
Extended Orbital Architecture
Planet / star radius ratio
0.015407
Semi-major axis / stellar radius
5.468
Impact parameter (b)
0.307
Transit mid-time (BJD)
2,454,964.5799
Angular separation (arcsec)
0.01560
Eq. Temperature
1,787K
(1514 °C)
Insolation (S⊕)
2,412.15
Earth = 1.00
Earth Similarity (ESI)
0.150
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched. 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-1873
Spectral Class
K-type orange
Effective Temperature
5,151 K — cooler than the Sun (5,778 K)
Estimated Age
1.00 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.792 R☉
Stellar Mass
0.903 M☉
Metallicity [Fe/H]
0.21
Extended Stellar Properties
Surface gravity (log g)
4.592 dex
Stellar density
8.804 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.191 mas
Total Proper Motion
12.028 mas/yr
PM Right Ascension
-0.24 mas/yr
PM Declination
12.03 mas/yr
Galactic Cartesian (pc)
x = 0.289 · y = -0.631 · z = 0.720
Equatorial (J2000)
RA 294.59656° · Dec 46.04837°
Galactic ℓ, b
78.990° · 11.690°
Ecliptic λ, β
314.627° · 65.720°
HTM-20 index
-1219850895
Similar Worlds
Kepler-658 b
Super-Earth · K-type orange
Radius 1.63 R⊕ · 1,266.7 ly
Kepler-866 b
Super-Earth · K-type orange
Radius 1.63 R⊕ · 2,109.1 ly
K2-254 b
Super-Earth · K-type orange
Radius 1.63 R⊕ · 742.9 ly
Kepler-202 b
Super-Earth · K-type orange
Radius 1.63 R⊕ · 929.9 ly
Kepler-1400 b
Super-Earth · K-type orange
Radius 1.62 R⊕ · 2,453.5 ly
Kepler-992 b
Super-Earth · K-type orange
Radius 1.62 R⊕ · 846.8 ly