Key parameters at a glance
- A radius of 2.73 Earth radii
- A mass of 7.90 Earth masses
- Surface gravity around 1.06 g
- An orbital period of 6.383 days
- Semi-major axis 0.0562 AU
- Equilibrium temperature 530 K (257 °C)
- Distance from Earth 1,045.62 light-years
- Earth Similarity Index 0.455
- Travel time at Voyager 1 speed 18,439,455 years
- Almost certainly tidally locked to its host star given the close orbit
1 sibling around Kepler-2000
Kepler-2000 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-2000 b this | Sub-Neptune | 2.73 | 7.90 | 6.383 | 530 | 2023 |
| Kepler-2000 c | Super-Earth | 1.57 | 3.09 | 20.618 | 359 | 2023 |
Kepler-2000 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#823of 1978
top 41.6%
This planet
2.73R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-2000 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.73 | 11.21 |
| Mass (M⊕) | 1.00 | 7.90 | 317.83 |
| Density (g/cm³) | 5.51 | 2.13 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.06 | 2.53 |
| Insolation (S⊕) | 1.00 | 18.73 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 350814495
Gaia DR2
Gaia DR2 2132144056342471168
Gaia DR3
Gaia DR3 2132144056342471168
System
Kepler-2000
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 6.38 Earth days (1.7% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0562 AU.
Transit Fingerprint
Depth
0.231 %
Duration
1.750 h
Impact parameter b
0.197
Rp / R★
0.043356
Transit midpoint (BJD)
2,455,003.6046
Photometric dip
Transit produces a flux drop of 2,313 ppm lasting ≈ 1.75 h.
Extended Orbital Architecture
Planet / star radius ratio
0.043356
Semi-major axis / stellar radius
28.550
Impact parameter (b)
0.197
Transit mid-time (BJD)
2,455,003.6046
Angular separation (arcsec)
0.17500
Eq. Temperature
530K
(257 °C)
Insolation (S⊕)
18.73
Earth = 1.00
Earth Similarity (ESI)
0.455
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. 2023Instrument
Kepler CCD Array
Publication
2023-05
Observation locale
Space
Discovery cohort
Planets confirmed in 2023 at Kepler (12 shown).
Host System: Kepler-2000
Spectral Class
K-type orange
Effective Temperature
3,757 K — cooler than the Sun (5,778 K)
Estimated Age
6.00 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.576 R☉
Stellar Mass
0.581 M☉
Metallicity [Fe/H]
0.48
Extended Stellar Properties
Surface gravity (log g)
4.681 dex
Stellar density
10.806 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
3.091 mas
Total Proper Motion
39.192 mas/yr
PM Right Ascension
-7.05 mas/yr
PM Declination
-38.55 mas/yr
Galactic Cartesian (pc)
x = 0.173 · y = -0.620 · z = 0.766
Equatorial (J2000)
RA 285.57430° · Dec 49.96212°
Galactic ℓ, b
80.188° · 18.783°
Ecliptic λ, β
303.191° · 71.611°
HTM-20 index
-503303062
Similar Worlds
K2-266 e
Sub-Neptune · K-type orange
Radius 2.73 R⊕ · 253.0 ly
Kepler-436 b
Sub-Neptune · K-type orange
Radius 2.73 R⊕ · 1,920.6 ly
Kepler-551 b
Sub-Neptune · K-type orange
Radius 2.73 R⊕ · 1,014.9 ly
TOI-125 b
Sub-Neptune · K-type orange
Radius 2.73 R⊕ · 362.2 ly
Kepler-1058 b
Sub-Neptune · K-type orange
Radius 2.72 R⊕ · 1,604.7 ly
Kepler-80 c
Sub-Neptune · K-type orange
Radius 2.74 R⊕ · 1,205.0 ly