Key parameters at a glance
- A radius of 1.45 Earth radii
- A mass of 0.52 Earth masses
- Surface gravity around 0.25 g
- An orbital period of 51.166 days
- Semi-major axis 0.2565 AU
- Equilibrium temperature 398 K (125 °C)
- Distance from Earth 1,719.89 light-years
- Earth Similarity Index 0.234
- Travel time at Voyager 1 speed 30,330,242 years
3 siblings around Kepler-176
Kepler-176 e shares its host star with 3 other confirmed planets. Side-by-side measurements below.
| Planet | Type | Radius (R⊕) | Mass (M⊕) | Period (d) | Eq. T (K) | Year |
|---|---|---|---|---|---|---|
| Kepler-176 b | Super-Earth | 1.43 | 290.54 | 5.433 | 841 | 2014 |
| Kepler-176 c | Sub-Neptune | 2.60 | 1.33 | 12.760 | 633 | 2014 |
| Kepler-176 d | Sub-Neptune | 2.51 | 1.72 | 25.752 | 501 | 2014 |
| Kepler-176 e this | Super-Earth | 1.45 | 0.52 | 51.166 | 398 | 2016 |
Kepler-176 e Planet Profile
Physical Specs
Classification
Planet Type
Super-Earth
Discovery
Size rank in cohort
Rank by radius
#837of 1176
top 71.1%
This planet
1.45R⊕
Super-Earth median
1.60R⊕
Nearest-size peers
| Metric | Earth | Kepler-176 e | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 1.45 | 11.21 |
| Mass (M⊕) | 1.00 | 0.52 | 317.83 |
| Density (g/cm³) | 5.51 | 0.04 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.25 | 2.53 |
| Insolation (S⊕) | 1.00 | 6.22 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 0.521 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 271159950
Gaia DR2
Gaia DR2 2078286197246582016
Gaia DR3
Gaia DR3 2078286197246582016
System
Kepler-176
Percentile among Super-Earth cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 51.17 Earth days (14.0% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.2565 AU.
Transit Fingerprint
Depth
0.026 %
Duration
4.715 h
Impact parameter b
0.820
Rp / R★
0.016054
Transit midpoint (BJD)
2,455,005.3084
Photometric dip
Transit produces a flux drop of 259 ppm lasting ≈ 4.72 h.
Extended Orbital Architecture
Planet / star radius ratio
0.016054
Semi-major axis / stellar radius
51.000
Impact parameter (b)
0.820
Transit mid-time (BJD)
2,455,005.3084
Angular separation (arcsec)
0.48600
Eq. Temperature
398K
(125 °C)
Insolation (S⊕)
6.22
Earth = 1.00
Earth Similarity (ESI)
0.234
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-176
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,295 K — cooler than the Sun (5,778 K)
Estimated Age
4.68 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.830 R☉
Stellar Mass
0.870 M☉
Metallicity [Fe/H]
0.03
Extended Stellar Properties
Surface gravity (log g)
4.550 dex
Stellar density
1.740 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
1.868 mas
Total Proper Motion
19.900 mas/yr
PM Right Ascension
-15.03 mas/yr
PM Declination
-13.04 mas/yr
Galactic Cartesian (pc)
x = 0.301 · y = -0.655 · z = 0.693
Equatorial (J2000)
RA 294.66790° · Dec 43.85321°
Galactic ℓ, b
77.026° · 10.636°
Ecliptic λ, β
312.740° · 63.677°
HTM-20 index
-1280058698
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