Key parameters at a glance
- A radius of 1.47 Earth radii
- A mass of 2.76 Earth masses
- Surface gravity around 1.28 g
- An orbital period of 13.261 days
- Semi-major axis 0.1065 AU
- Equilibrium temperature 760 K (487 °C)
- Distance from Earth 2,791.31 light-years
- Earth Similarity Index 0.401
- Travel time at Voyager 1 speed 49,224,719 years
1 sibling around Kepler-1991
Kepler-1991 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-1991 b this | Super-Earth | 1.47 | 2.76 | 13.261 | 760 | 2023 |
| Kepler-1991 c | Sub-Neptune | 2.57 | 7.13 | 22.790 | 634 | 2023 |
Kepler-1991 b Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#802of 1176
top 68.1%
This planet
1.47R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | Kepler-1991 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.47 | 11.21 |
| Mass (M⊕) | 1.00 | 2.76 | 317.83 |
| Density (g/cm³) | 5.51 | 4.77 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.28 | 2.53 |
| Insolation (S⊕) | 1.00 | 78.79 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 164831457
Gaia DR2
Gaia DR2 2106371744306291328
Gaia DR3
Gaia DR3 2106371744306291328
System
Kepler-1991
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 13.26 Earth days (3.6% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1065 AU.
Transit Fingerprint
Depth
0.020 %
Duration
3.912 h
Impact parameter b
0.220
Rp / R★
0.012760
Transit midpoint (BJD)
2,454,972.0988
Photometric dip
Transit produces a flux drop of 199 ppm lasting ≈ 3.91 h.
Extended Orbital Architecture
Planet / star radius ratio
0.012760
Semi-major axis / stellar radius
25.610
Impact parameter (b)
0.220
Transit mid-time (BJD)
2,454,972.0988
Angular separation (arcsec)
0.12400
Eq. Temperature
760K
(487 °C)
Insolation (S⊕)
78.79
Earth = 1.00
Earth Similarity (ESI)
0.401
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
Valizadegan et al. 2023Instrument
Kepler CCD Array
Publication
2023-05
Observation locale
Space
Discovery cohort
Planets confirmed in 2023 at Kepler (12 shown).
Host System: Kepler-1991
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,478 K — cooler than the Sun (5,778 K)
Estimated Age
6.76 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
1.053 R☉
Stellar Mass
0.914 M☉
Metallicity [Fe/H]
0.16
Extended Stellar Properties
Surface gravity (log g)
4.354 dex
Stellar density
1.807 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 15 bands
Astrometric Data
Parallax
1.140 mas
Total Proper Motion
15.107 mas/yr
PM Right Ascension
-7.94 mas/yr
PM Declination
-12.85 mas/yr
Galactic Cartesian (pc)
x = 0.183 · y = -0.682 · z = 0.708
Equatorial (J2000)
RA 285.03605° · Dec 45.07099°
Galactic ℓ, b
75.239° · 17.395°
Ecliptic λ, β
298.026° · 67.053°
HTM-20 index
416626189
Similar Worlds
K2-184 b
Super-Earth · G-type yellow (Sun-like)
Radius 1.47 R⊕ · 246.5 ly
Kepler-1198 b
Super-Earth · G-type yellow (Sun-like)
Radius 1.47 R⊕ · 2,423.4 ly
Kepler-10 b
Super-Earth · G-type yellow (Sun-like)
Radius 1.47 R⊕ · 605.0 ly
Kepler-1431 b
Super-Earth · G-type yellow (Sun-like)
Radius 1.47 R⊕ · 5,294.3 ly
Kepler-292 c
Super-Earth · G-type yellow (Sun-like)
Radius 1.47 R⊕ · 3,445.8 ly
K2-80 c
Super-Earth · G-type yellow (Sun-like)
Radius 1.47 R⊕ · 654.9 ly