Key parameters at a glance
- A radius of 1.57 Earth radii
- A mass of 3.09 Earth masses
- Surface gravity around 1.25 g
- An orbital period of 4.194 days
- Semi-major axis 0.0419 AU
- Equilibrium temperature 577 K (304 °C)
- Distance from Earth 438.06 light-years
- Earth Similarity Index 0.513
- Travel time at Voyager 1 speed 7,725,247 years
- Almost certainly tidally locked to its host star given the close orbit
1 sibling around Kepler-974
Kepler-974 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 |
|---|---|---|---|---|---|---|
| KOI-1843.03 | Rocky Terrestrial | 0.61 | 8.00 | 0.177 | 1,654 | 2013 |
| Kepler-974 b this | Super-Earth | 1.57 | 3.09 | 4.194 | 577 | 2016 |
Kepler-974 b Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#618of 1176
top 52.5%
This planet
1.57R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | Kepler-974 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.57 | 11.21 |
| Mass (M⊕) | 1.00 | 3.09 | 317.83 |
| Density (g/cm³) | 5.51 | 4.39 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.25 | 2.53 |
| Insolation (S⊕) | 1.00 | 28.51 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 120418600
Gaia DR2
Gaia DR2 2103377980301947264
Gaia DR3
Gaia DR3 2103377980301947264
System
Kepler-974
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 4.19 Earth days (1.1% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0419 AU.
Transit Fingerprint
Depth
0.075 %
Duration
1.848 h
Impact parameter b
0.824
Rp / R★
0.029387
Transit midpoint (BJD)
2,454,967.1343
Photometric dip
Transit produces a flux drop of 745 ppm lasting ≈ 1.85 h.
Extended Orbital Architecture
Planet / star radius ratio
0.029387
Semi-major axis / stellar radius
10.740
Impact parameter (b)
0.824
Transit mid-time (BJD)
2,454,967.1343
Angular separation (arcsec)
0.31200
Eq. Temperature
577K
(304 °C)
Insolation (S⊕)
28.51
Earth = 1.00
Earth Similarity (ESI)
0.513
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the surface is too hot to retain surface water. Close-orbiting tidally-locked around a cool host.
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-974
Spectral Class
M-type red dwarf
Effective Temperature
3,687 K — cooler than the Sun (5,778 K)
Estimated Age
4.37 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.500 R☉
Stellar Mass
0.520 M☉
Metallicity [Fe/H]
0.07
Extended Stellar Properties
Surface gravity (log g)
4.760 dex
Stellar density
4.838 g/cm³
Rotation period
34.50 days
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 17 bands
Astrometric Data
Parallax
7.417 mas
Total Proper Motion
41.192 mas/yr
PM Right Ascension
0.69 mas/yr
PM Declination
41.19 mas/yr
Galactic Cartesian (pc)
x = 0.198 · y = -0.737 · z = 0.646
Equatorial (J2000)
RA 285.01311° · Dec 40.22095°
Galactic ℓ, b
70.540° · 15.599°
Ecliptic λ, β
295.225° · 62.352°
HTM-20 index
-434478442
Similar Worlds
Kepler-249 d
Super-Earth · M-type red dwarf
Radius 1.57 R⊕ · 621.0 ly
Kepler-236 b
Super-Earth · M-type red dwarf
Radius 1.57 R⊕ · 941.8 ly
Kepler-309 b
Super-Earth · M-type red dwarf
Radius 1.56 R⊕ · 1,776.1 ly
K2-354 b
Super-Earth · M-type red dwarf
Radius 1.56 R⊕ · 299.2 ly
Kepler-445 b
Super-Earth · M-type red dwarf
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Kepler-49 e
Super-Earth · M-type red dwarf
Radius 1.56 R⊕ · 1,015.1 ly