Key parameters at a glance
- A radius of 2.09 Earth radii
- A mass of 5.02 Earth masses
- Surface gravity around 1.15 g
- An orbital period of 56.189 days
- Semi-major axis 0.2987 AU
- Equilibrium temperature 503 K (230 °C)
- Distance from Earth 2,666.80 light-years
- Earth Similarity Index 0.528
- Travel time at Voyager 1 speed 47,029,099 years
1 sibling around Kepler-1047
Kepler-1047 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-1047 c | Rocky Terrestrial | 0.99 | 0.94 | 3.189 | 1,309 | 2016 |
| Kepler-1047 b this | Sub-Neptune | 2.09 | 5.02 | 56.189 | 503 | 2016 |
Kepler-1047 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1832of 1978
top 92.6%
This planet
2.09R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-1047 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.09 | 11.21 |
| Mass (M⊕) | 1.00 | 5.02 | 317.83 |
| Density (g/cm³) | 5.51 | 3.02 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.15 | 2.53 |
| Insolation (S⊕) | 1.00 | 28.85 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 299029323
Gaia DR2
Gaia DR2 2133309160710350336
Gaia DR3
Gaia DR3 2133309160710350336
System
Kepler-1047
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 56.19 Earth days (15.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.2987 AU.
Transit Fingerprint
Depth
0.035 %
Duration
6.089 h
Impact parameter b
0.887
Rp / R★
0.017078
Transit midpoint (BJD)
2,454,979.3801
Photometric dip
Transit produces a flux drop of 346 ppm lasting ≈ 6.09 h.
Extended Orbital Architecture
Planet / star radius ratio
0.017078
Semi-major axis / stellar radius
32.400
Impact parameter (b)
0.887
Transit mid-time (BJD)
2,454,979.3801
Angular separation (arcsec)
0.36500
Eq. Temperature
503K
(230 °C)
Insolation (S⊕)
28.85
Earth = 1.00
Earth Similarity (ESI)
0.528
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
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-1047
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,754 K — cooler than the Sun (5,778 K)
Estimated Age
4.47 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.130 R☉
Stellar Mass
1.080 M☉
Metallicity [Fe/H]
0.29
Extended Stellar Properties
Surface gravity (log g)
4.370 dex
Stellar density
0.270 g/cm³
Systemic radial velocity
-35.22 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.194 mas
Total Proper Motion
11.014 mas/yr
PM Right Ascension
-4.81 mas/yr
PM Declination
-9.91 mas/yr
Galactic Cartesian (pc)
x = 0.202 · y = -0.599 · z = 0.775
Equatorial (J2000)
RA 288.64626° · Dec 50.78896°
Galactic ℓ, b
81.740° · 17.252°
Ecliptic λ, β
309.940° · 71.650°
HTM-20 index
216031900
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