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 4.225 days
- Semi-major axis 0.0520 AU
- Equilibrium temperature 1,254 K (981 °C)
- Distance from Earth 3,339.51 light-years
- Earth Similarity Index 0.238
- Travel time at Voyager 1 speed 58,892,278 years
4 siblings around Kepler-84
Kepler-84 d shares its host star with 4 other confirmed planets. Side-by-side measurements below.
| Planet | Type | Radius (R⊕) | Mass (M⊕) | Period (d) | Eq. T (K) | Year |
|---|---|---|---|---|---|---|
| Kepler-84 d this | Super-Earth | 1.38 | 2.48 | 4.225 | 1,254 | 2014 |
| Kepler-84 b | Sub-Neptune | 2.23 | 40.00 | 8.726 | 985 | 2012 |
| Kepler-84 c | Sub-Neptune | 2.36 | 20.20 | 12.883 | 865 | 2012 |
| Kepler-84 e | Sub-Neptune | 2.60 | 7.27 | 27.434 | 672 | 2014 |
| Kepler-84 f | Sub-Neptune | 2.20 | 5.48 | 44.552 | 572 | 2014 |
Kepler-84 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-84 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 | 584.24 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 170646917
Gaia DR2
Gaia DR2 2073776859551124992
Gaia DR3
Gaia DR3 2073776859551124992
System
Kepler-84
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 4.22 Earth days (1.2% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0520 AU.
Transit Fingerprint
Depth
0.016 %
Duration
3.172 h
Impact parameter b
0.020
Rp / R★
0.011604
Transit midpoint (BJD)
2,454,968.4333
Photometric dip
Transit produces a flux drop of 159 ppm lasting ≈ 3.17 h.
Extended Orbital Architecture
Planet / star radius ratio
0.011604
Semi-major axis / stellar radius
10.448
Impact parameter (b)
0.020
Transit mid-time (BJD)
2,454,968.4333
Angular separation (arcsec)
0.05080
Eq. Temperature
1,254K
(981 °C)
Insolation (S⊕)
584.24
Earth = 1.00
Earth Similarity (ESI)
0.238
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-84
Spectral Class
F-type yellow-white
Effective Temperature
6,031 K — hotter than the Sun (5,778 K)
Estimated Age
3.98 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.169 R☉
Stellar Mass
1.060 M☉
Metallicity [Fe/H]
-0.07
Extended Stellar Properties
Surface gravity (log g)
4.323 dex
Stellar density
0.029 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
0.693 mas
Total Proper Motion
4.035 mas/yr
PM Right Ascension
-1.08 mas/yr
PM Declination
-3.89 mas/yr
Galactic Cartesian (pc)
x = 0.360 · y = -0.670 · z = 0.649
Equatorial (J2000)
RA 298.25202° · Dec 40.49608°
Galactic ℓ, b
75.354° · 6.689°
Ecliptic λ, β
315.291° · 59.572°
HTM-20 index
-620986613
Similar Worlds
Kepler-402 d
Super-Earth · F-type yellow-white
Radius 1.38 R⊕ · 2,039.6 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