Key parameters at a glance
- A radius of 2.82 Earth radii
- A mass of 8.35 Earth masses
- Surface gravity around 1.05 g
- An orbital period of 105.145 days
- Semi-major axis 0.4471 AU
- Equilibrium temperature 401 K (128 °C)
- Distance from Earth 4,042.70 light-years
- Earth Similarity Index 0.571
- Travel time at Voyager 1 speed 71,293,074 years
1 sibling around Kepler-722
Kepler-722 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-722 b | Sub-Neptune | 2.63 | 7.41 | 4.094 | 1,182 | 2016 |
| Kepler-722 c this | Sub-Neptune | 2.82 | 8.35 | 105.145 | 401 | 2016 |
Kepler-722 c Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#720of 1978
top 36.3%
This planet
2.82R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-722 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.82 | 11.21 |
| Mass (M⊕) | 1.00 | 8.35 | 317.83 |
| Density (g/cm³) | 5.51 | 2.05 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.05 | 2.53 |
| Insolation (S⊕) | 1.00 | 5.48 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 159304532
Gaia DR2
Gaia DR2 2126985280924750720
Gaia DR3
Gaia DR3 2126985280924750720
System
Kepler-722
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 105.14 Earth days (28.8% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.4471 AU.
Transit Fingerprint
Depth
0.069 %
Duration
7.239 h
Impact parameter b
0.964
Rp / R★
0.024877
Transit midpoint (BJD)
2,455,011.3666
Photometric dip
Transit produces a flux drop of 685 ppm lasting ≈ 7.24 h.
Extended Orbital Architecture
Planet / star radius ratio
0.024877
Semi-major axis / stellar radius
34.300
Impact parameter (b)
0.964
Transit mid-time (BJD)
2,455,011.3666
Angular separation (arcsec)
0.36100
Eq. Temperature
401K
(128 °C)
Insolation (S⊕)
5.48
Earth = 1.00
Earth Similarity (ESI)
0.571
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water.
Discovery Paper
Primary reference
Morton et al. 2016Instrument
Kepler CCD Array
Publication
2016-05
Observation locale
Space
Discovery cohort
Planets confirmed in 2016 at Kepler (12 shown).
Host System: Kepler-722
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,863 K — hotter than the Sun (5,778 K)
Estimated Age
4.37 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.050 R☉
Stellar Mass
1.030 M☉
Metallicity [Fe/H]
0.02
Extended Stellar Properties
Surface gravity (log g)
4.410 dex
Stellar density
2.994 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
0.779 mas
Total Proper Motion
9.623 mas/yr
PM Right Ascension
-3.39 mas/yr
PM Declination
-9.01 mas/yr
Galactic Cartesian (pc)
x = 0.247 · y = -0.668 · z = 0.702
Equatorial (J2000)
RA 290.26329° · Dec 44.55641°
Galactic ℓ, b
76.250° · 13.781°
Ecliptic λ, β
306.438° · 65.452°
HTM-20 index
1481618691
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