Key parameters at a glance
- A radius of 1.77 Earth radii
- A mass of 3.78 Earth masses
- Surface gravity around 1.21 g
- An orbital period of 4.915 days
- Semi-major axis 0.0570 AU
- Equilibrium temperature 1,042 K (769 °C)
- Distance from Earth 1,254.21 light-years
- Earth Similarity Index 0.271
- Travel time at Voyager 1 speed 22,117,936 years
1 sibling around Kepler-321
Kepler-321 b 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-321 b this | Super-Earth | 1.77 | 3.78 | 4.915 | 1,042 | 2014 |
| Kepler-321 c | Sub-Neptune | 2.32 | 5.99 | 13.094 | 752 | 2014 |
Kepler-321 b Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#293of 1176
top 24.8%
This planet
1.77R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | Kepler-321 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.77 | 11.21 |
| Mass (M⊕) | 1.00 | 3.78 | 317.83 |
| Density (g/cm³) | 5.51 | 3.75 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.21 | 2.53 |
| Insolation (S⊕) | 1.00 | 296.16 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 271046140
Gaia DR2
Gaia DR2 2078327974388092544
Gaia DR3
Gaia DR3 2078327974388092544
System
Kepler-321
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 4.92 Earth days (1.3% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0570 AU.
Transit Fingerprint
Depth
0.023 %
Duration
2.725 h
Impact parameter b
0.060
Rp / R★
0.015303
Transit midpoint (BJD)
2,454,965.6954
Photometric dip
Transit produces a flux drop of 229 ppm lasting ≈ 2.73 h.
Extended Orbital Architecture
Planet / star radius ratio
0.015303
Semi-major axis / stellar radius
10.200
Impact parameter (b)
0.060
Transit mid-time (BJD)
2,454,965.6954
Angular separation (arcsec)
0.14800
Eq. Temperature
1,042K
(769 °C)
Insolation (S⊕)
296.16
Earth = 1.00
Earth Similarity (ESI)
0.271
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-321
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,740 K — cooler than the Sun (5,778 K)
Estimated Age
2.09 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.194 R☉
Stellar Mass
1.024 M☉
Metallicity [Fe/H]
0.12
Extended Stellar Properties
Surface gravity (log g)
4.302 dex
Stellar density
1.090 g/cm³
Systemic radial velocity
-10.77 km/s
Metallicity ratio
[M/H]
Multi-band Host Photometry — 15 bands
Astrometric Data
Parallax
2.572 mas
Total Proper Motion
3.522 mas/yr
PM Right Ascension
1.28 mas/yr
PM Declination
-3.28 mas/yr
Galactic Cartesian (pc)
x = 0.297 · y = -0.653 · z = 0.696
Equatorial (J2000)
RA 294.45370° · Dec 44.14576°
Galactic ℓ, b
77.218° · 10.908°
Ecliptic λ, β
312.665° · 64.006°
HTM-20 index
-1300374114
Similar Worlds
Kepler-286 e
Super-Earth · G-type yellow (Sun-like)
Radius 1.77 R⊕ · 4,001.4 ly
Kepler-822 b
Super-Earth · G-type yellow (Sun-like)
Radius 1.77 R⊕ · 2,806.2 ly
Kepler-82 d
Super-Earth · G-type yellow (Sun-like)
Radius 1.77 R⊕ · 2,949.5 ly
rho CrB e
Super-Earth · G-type yellow (Sun-like)
Radius 1.77 R⊕ · 57.0 ly
Kepler-294 b
Super-Earth · G-type yellow (Sun-like)
Radius 1.77 R⊕ · 4,426.0 ly
Kepler-1260 b
Super-Earth · G-type yellow (Sun-like)
Radius 1.77 R⊕ · 5,656.9 ly