Key parameters at a glance
- A radius of 0.84 Earth radii
- A mass of 17.60 Earth masses
- Surface gravity around 25.12 g
- An orbital period of 7.515 days
- Semi-major axis 0.0827 AU
- Equilibrium temperature 1,199 K (926 °C)
- Distance from Earth 1,487.21 light-years
- Earth Similarity Index 0.128
- Travel time at Voyager 1 speed 26,226,994 years
2 siblings around Kepler-450
Kepler-450 d 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-450 d this | Rocky Terrestrial | 0.84 | 17.60 | 7.515 | 1,199 | 2015 |
| Kepler-450 c | Sub-Neptune | 2.62 | 12.50 | 15.413 | 944 | 2015 |
| Kepler-450 b | Neptune-like | 6.14 | 19.40 | 28.455 | 769 | 2015 |
Kepler-450 d Planet Profile
Physical Specs
Classification
Planet Type
Rocky Terrestrial
Discovery
Size rank in cohort
Rank by radius
#459of 570
top 80.4%
This planet
0.84R⊕
Rocky Terrestrial median
1.01R⊕
Nearest-size peers
| Metric | Earth | Kepler-450 d | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 0.84 | 11.21 |
| Mass (M⊕) | 1.00 | 17.60 | 317.83 |
| Density (g/cm³) | 5.51 | 77.00 | 1.33 |
| Surface Gravity (g) | 1.00 | 25.12 | 2.53 |
| Insolation (S⊕) | 1.00 | 557.21 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 17.600 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 27534138
Gaia DR2
Gaia DR2 2135590578620605568
Gaia DR3
Gaia DR3 2135590578620605568
System
Kepler-450
Percentile among Rocky Terrestrial cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 7.51 Earth days (2.1% of a terrestrial year) on a mildly elliptical path at a mean orbital distance of 0.0827 AU.
Transit Fingerprint
Depth
0.003 %
Duration
4.965 h
Impact parameter b
0.400
Rp / R★
0.005171
Transit midpoint (BJD)
2,454,969.1753
Photometric dip
Transit produces a flux drop of 32 ppm lasting ≈ 4.97 h.
Extended Orbital Architecture
Planet / star radius ratio
0.005171
Semi-major axis / stellar radius
10.859
Impact parameter (b)
0.400
Transit mid-time (BJD)
2,454,969.1753
Angular separation (arcsec)
0.18100
Eq. Temperature
1,199K
(926 °C)
Insolation (S⊕)
557.21
Earth = 1.00
Earth Similarity (ESI)
0.128
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.
Discovery Paper
Primary reference
Van Eylen Albrecht 2015Instrument
Kepler CCD Array
Publication
2015-08
Observation locale
Space
Discovery cohort
Planets confirmed in 2015 at Kepler (12 shown).
Host System: Kepler-450
Spectral Class
F-type yellow-white
Effective Temperature
6,197 K — hotter than the Sun (5,778 K)
Estimated Age
2.57 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.642 R☉
Stellar Mass
1.190 M☉
Metallicity [Fe/H]
0.13
Extended Stellar Properties
Surface gravity (log g)
4.083 dex
Stellar density
0.379 g/cm³
Systemic radial velocity
-16.41 km/s
Metallicity ratio
[M/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
2.164 mas
Total Proper Motion
7.854 mas/yr
PM Right Ascension
4.17 mas/yr
PM Declination
6.65 mas/yr
Galactic Cartesian (pc)
x = 0.271 · y = -0.568 · z = 0.777
Equatorial (J2000)
RA 295.48658° · Dec 51.01352°
Galactic ℓ, b
83.797° · 13.417°
Ecliptic λ, β
321.950° · 69.894°
HTM-20 index
-262721394
Similar Worlds
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Kepler-408 b
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