Key parameters at a glance
- A radius of 18.18 Earth radii
- A mass of 140.16 Earth masses
- Surface gravity around 0.42 g
- An orbital period of 4.885 days
- Semi-major axis 0.0607 AU
- Equilibrium temperature 1,630 K (1357 °C)
- Distance from Earth 3,008.99 light-years
- Earth Similarity Index 0.054
- Travel time at Voyager 1 speed 53,063,559 years
Kepler-7 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#63of 1771
top 3.5%
This planet
18.18R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | Kepler-7 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 18.18 | 11.21 |
| Mass (M⊕) | 1.00 | 140.16 | 317.83 |
| Density (g/cm³) | 5.51 | 0.14 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.42 | 2.53 |
| Insolation (S⊕) | 1.00 | 1,375.11 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 140.163 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 121660904
Gaia DR2
Gaia DR2 2102117871259036672
Gaia DR3
Gaia DR3 2102117871259036672
System
Kepler-7
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 4.89 Earth days (1.3% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0607 AU.
Transit Fingerprint
Depth
0.757 %
Duration
5.131 h
Impact parameter b
0.560
Rp / R★
0.082940
Transit midpoint (BJD)
2,454,967.2769
Photometric dip
Transit produces a flux drop of 7,569 ppm lasting ≈ 5.13 h.
Extended Orbital Architecture
Planet / star radius ratio
0.082940
Semi-major axis / stellar radius
6.637
Impact parameter (b)
0.560
RV semi-amplitude (K)
42.900 m/s
Occultation depth
0.004 ppm
Transit mid-time (BJD)
2,454,967.2769
Angular separation (arcsec)
0.06580
Eq. Temperature
1,630K
(1357 °C)
Insolation (S⊕)
1,375.11
Earth = 1.00
Earth Similarity (ESI)
0.054
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.
Detection Signatures
Transit photometry
A transit dip has been observed from at least one telescope.
Radial velocity
Stellar wobble has been measured spectroscopically.
Orbital-brightness modulation
Host star brightness varies with the planet's orbit.
Discovery Paper
Primary reference
Latham et al. 2010Instrument
Kepler CCD Array
Publication
2010-04
Observation locale
Space
Discovery cohort
Planets confirmed in 2009 at Kepler (3 shown).
Host System: Kepler-7
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,933 K — hotter than the Sun (5,778 K)
Estimated Age
2.90 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.966 R☉
Stellar Mass
1.359 M☉
Metallicity [Fe/H]
0.11
Extended Stellar Properties
Surface gravity (log g)
3.980 dex
Stellar density
0.320 g/cm³
Systemic radial velocity
0.40 km/s
Rotational v·sin i
4.20 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.055 mas
Total Proper Motion
21.157 mas/yr
PM Right Ascension
-2.96 mas/yr
PM Declination
-20.95 mas/yr
Galactic Cartesian (pc)
x = 0.240 · y = -0.714 · z = 0.657
Equatorial (J2000)
RA 288.58149° · Dec 41.08973°
Galactic ℓ, b
72.478° · 13.463°
Ecliptic λ, β
301.360° · 62.520°
HTM-20 index
-1321322063
Observation Record
Photometric series
1
RV measurements
1
Archive notes
1
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