Key parameters at a glance
- A radius of 1.88 Earth radii
- A mass of 4.19 Earth masses
- Surface gravity around 1.19 g
- An orbital period of 5.701 days
- Semi-major axis 0.0650 AU
- Equilibrium temperature 1,035 K (762 °C)
- Distance from Earth 5,826.71 light-years
- Earth Similarity Index 0.267
- Travel time at Voyager 1 speed 102,754,055 years
1 sibling around Kepler-291
Kepler-291 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-291 b | Sub-Neptune | 2.16 | 5.31 | 3.547 | 1,212 | 2014 |
| Kepler-291 c this | Super-Earth | 1.88 | 4.19 | 5.701 | 1,035 | 2014 |
Kepler-291 c Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#153of 1176
top 12.9%
This planet
1.88R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | Kepler-291 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.88 | 11.21 |
| Mass (M⊕) | 1.00 | 4.19 | 317.83 |
| Density (g/cm³) | 5.51 | 3.47 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.19 | 2.53 |
| Insolation (S⊕) | 1.00 | 332.74 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 158631683
Gaia DR2
Gaia DR2 2102509125599126144
Gaia DR3
Gaia DR3 2102509125599126144
System
Kepler-291
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 5.70 Earth days (1.6% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0650 AU.
Transit Fingerprint
Depth
0.038 %
Duration
1.647 h
Impact parameter b
0.570
Rp / R★
0.017928
Transit midpoint (BJD)
2,454,965.6867
Photometric dip
Transit produces a flux drop of 380 ppm lasting ≈ 1.65 h.
Extended Orbital Architecture
Planet / star radius ratio
0.017928
Semi-major axis / stellar radius
27.020
Impact parameter (b)
0.570
Transit mid-time (BJD)
2,454,965.6867
Angular separation (arcsec)
0.03640
Eq. Temperature
1,035K
(762 °C)
Insolation (S⊕)
332.74
Earth = 1.00
Earth Similarity (ESI)
0.267
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-291
Spectral Class
F-type yellow-white
Effective Temperature
6,002 K — hotter than the Sun (5,778 K)
Estimated Age
7.76 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
1.016 R☉
Stellar Mass
1.023 M☉
Metallicity [Fe/H]
0.23
Extended Stellar Properties
Surface gravity (log g)
4.472 dex
Stellar density
0.650 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
0.531 mas
Total Proper Motion
7.996 mas/yr
PM Right Ascension
-3.33 mas/yr
PM Declination
-7.27 mas/yr
Galactic Cartesian (pc)
x = 0.227 · y = -0.702 · z = 0.675
Equatorial (J2000)
RA 287.91630° · Dec 42.43727°
Galactic ℓ, b
73.537° · 14.465°
Ecliptic λ, β
301.129° · 63.953°
HTM-20 index
-1941729273
Similar Worlds
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Kepler-824 b
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Kepler-1280 b
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