Key parameters at a glance
- A radius of 3.15 Earth radii
- A mass of 10.10 Earth masses
- Surface gravity around 1.02 g
- An orbital period of 29.542 days
- Semi-major axis 0.1792 AU
- Equilibrium temperature 515 K (242 °C)
- Distance from Earth 7,615.51 light-years
- Earth Similarity Index 0.442
- Travel time at Voyager 1 speed 134,299,587 years
1 sibling around Kepler-896
Kepler-896 c 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-896 c this | Sub-Neptune | 3.15 | 10.10 | 29.542 | 515 | 2023 |
| Kepler-896 b | Sub-Neptune | 2.53 | 6.94 | 144.547 | 303 | 2016 |
Kepler-896 c Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#391of 1978
top 19.7%
This planet
3.15R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-896 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 3.15 | 11.21 |
| Mass (M⊕) | 1.00 | 10.10 | 317.83 |
| Density (g/cm³) | 5.51 | 1.78 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.02 | 2.53 |
| Insolation (S⊕) | 1.00 | 16.56 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 123490277
Gaia DR2
Gaia DR2 2105221139747765504
Gaia DR3
Gaia DR3 2105221139747765504
System
Kepler-896
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 29.54 Earth days (8.1% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1792 AU.
Transit Fingerprint
Depth
0.088 %
Duration
13.902 h
Impact parameter b
0.959
Rp / R★
0.035889
Transit midpoint (BJD)
2,454,970.5784
Photometric dip
Transit produces a flux drop of 880 ppm lasting ≈ 13.90 h.
Extended Orbital Architecture
Planet / star radius ratio
0.035889
Semi-major axis / stellar radius
6.444
Impact parameter (b)
0.959
Transit mid-time (BJD)
2,454,970.5784
Angular separation (arcsec)
0.07670
Eq. Temperature
515K
(242 °C)
Insolation (S⊕)
16.56
Earth = 1.00
Earth Similarity (ESI)
0.442
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water.
Detection Signatures
Transit photometry
A transit dip has been observed from at least one telescope.
Transit timing variations
Gravitational interactions from neighbours have been detected.
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-896
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,510 K — cooler than the Sun (5,778 K)
Estimated Age
7.59 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.803 R☉
Stellar Mass
0.877 M☉
Metallicity [Fe/H]
-0.16
Extended Stellar Properties
Surface gravity (log g)
4.572 dex
Stellar density
0.006 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
0.398 mas
Total Proper Motion
9.500 mas/yr
PM Right Ascension
-3.45 mas/yr
PM Declination
-8.85 mas/yr
Galactic Cartesian (pc)
x = 0.156 · y = -0.706 · z = 0.691
Equatorial (J2000)
RA 282.43914° · Dec 43.73443°
Galactic ℓ, b
73.236° · 18.660°
Ecliptic λ, β
292.679° · 66.197°
HTM-20 index
-672102039
Similar Worlds
Kepler-1001 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 3.15 R⊕ · 3,029.9 ly
TOI-2141 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 3.15 R⊕ · 253.4 ly
Kepler-1790 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 3.14 R⊕ · 3,490.4 ly
TOI-1716.01
Sub-Neptune · G-type yellow (Sun-like)
Radius 3.14 R⊕ · 339.7 ly
HD 134060 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 3.16 R⊕ · 78.3 ly
Kepler-222 b
Sub-Neptune · G-type yellow (Sun-like)
Radius 3.16 R⊕ · 2,475.0 ly