Key parameters at a glance
- A radius of 1.38 Earth radii
- A mass of 2.48 Earth masses
- Surface gravity around 1.30 g
- An orbital period of 8.921 days
- Semi-major axis 0.0870 AU
- Equilibrium temperature 1,006 K (733 °C)
- Distance from Earth 2,039.58 light-years
- Earth Similarity Index 0.304
- Travel time at Voyager 1 speed 35,968,003 years
3 siblings around Kepler-402
Kepler-402 d shares its host star with 3 other confirmed planets. Side-by-side measurements below.
| Planet | Type | Radius (R⊕) | Mass (M⊕) | Period (d) | Eq. T (K) | Year |
|---|---|---|---|---|---|---|
| Kepler-402 b | Rocky Terrestrial | 1.22 | 1.98 | 4.029 | 1,311 | 2014 |
| Kepler-402 c | Super-Earth | 1.56 | 3.05 | 6.125 | 1,140 | 2014 |
| Kepler-402 d this | Super-Earth | 1.38 | 2.48 | 8.921 | 1,006 | 2014 |
| Kepler-402 e | Super-Earth | 1.46 | 2.73 | 11.243 | 931 | 2014 |
Kepler-402 d Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#953of 1176
top 81.0%
This planet
1.38R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | Kepler-402 d | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.38 | 11.21 |
| Mass (M⊕) | 1.00 | 2.48 | 317.83 |
| Density (g/cm³) | 5.51 | 5.19 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.30 | 2.53 |
| Insolation (S⊕) | 1.00 | 214.28 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 158725491
Gaia DR2
Gaia DR2 2102954187290293120
Gaia DR3
Gaia DR3 2102954187290293120
System
Kepler-402
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 8.92 Earth days (2.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0870 AU.
Transit Fingerprint
Depth
0.011 %
Duration
3.838 h
Impact parameter b
0.110
Rp / R★
0.009499
Transit midpoint (BJD)
2,454,970.4910
Photometric dip
Transit produces a flux drop of 106 ppm lasting ≈ 3.84 h.
Extended Orbital Architecture
Planet / star radius ratio
0.009499
Semi-major axis / stellar radius
16.900
Impact parameter (b)
0.110
Transit mid-time (BJD)
2,454,970.4910
Angular separation (arcsec)
0.13900
Eq. Temperature
1,006K
(733 °C)
Insolation (S⊕)
214.28
Earth = 1.00
Earth Similarity (ESI)
0.304
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.
Discovery Paper
Primary reference
Rowe et al. 2014Instrument
Kepler CCD Array
Publication
2014-03
Observation locale
Space
Discovery cohort
Planets confirmed in 2014 at Kepler (12 shown).
Host System: Kepler-402
Spectral Class
F-type yellow-white
Effective Temperature
6,090 K — hotter than the Sun (5,778 K)
Estimated Age
1.40 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.264 R☉
Stellar Mass
1.072 M☉
Metallicity [Fe/H]
-0.08
Extended Stellar Properties
Surface gravity (log g)
4.278 dex
Stellar density
0.840 g/cm³
Systemic radial velocity
4.34 km/s
Metallicity ratio
[M/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.570 mas
Total Proper Motion
4.422 mas/yr
PM Right Ascension
-4.30 mas/yr
PM Declination
1.02 mas/yr
Galactic Cartesian (pc)
x = 0.229 · y = -0.690 · z = 0.687
Equatorial (J2000)
RA 288.37020° · Dec 43.35461°
Galactic ℓ, b
74.543° · 14.530°
Ecliptic λ, β
302.472° · 64.736°
HTM-20 index
246497150
Similar Worlds
Kepler-84 d
Super-Earth · F-type yellow-white
Radius 1.38 R⊕ · 3,339.5 ly
Kepler-323 b
Super-Earth · F-type yellow-white
Radius 1.38 R⊕ · 1,483.6 ly
Kepler-320 c
Super-Earth · F-type yellow-white
Radius 1.37 R⊕ · 2,696.0 ly
Kepler-1300 b
Super-Earth · F-type yellow-white
Radius 1.37 R⊕ · 2,534.3 ly
Kepler-208 c
Super-Earth · F-type yellow-white
Radius 1.39 R⊕ · 2,528.8 ly
Kepler-1394 b
Super-Earth · F-type yellow-white
Radius 1.39 R⊕ · 2,088.7 ly