Key parameters at a glance
- A radius of 6.43 Earth radii
- A mass of 33.80 Earth masses
- Surface gravity around 0.82 g
- An orbital period of 76.378 days
- Semi-major axis 0.2952 AU
- Equilibrium temperature 240 K (-33 °C)
- Distance from Earth 1,148.07 light-years
- Earth Similarity Index 0.447
- Travel time at Voyager 1 speed 20,246,198 years
Kepler-1628 b Planet Profile
Physical Specs
Classification
Planet Type
Neptune-like
Discovery
Size rank in cohort
Rank by radius
#244of 574
top 42.3%
This planet
6.43R⊕
Neptune-like median
6.39R⊕
Nearest-size peers
| Metric | Earth | Kepler-1628 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 6.43 | 11.21 |
| Mass (M⊕) | 1.00 | 33.80 | 317.83 |
| Density (g/cm³) | 5.51 | 0.70 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.82 | 2.53 |
| Insolation (S⊕) | 1.00 | 0.79 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 123362984
Gaia DR2
Gaia DR2 2105245187265625728
System
Kepler-1628
Percentile among Neptune-like cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 76.38 Earth days (20.9% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.2952 AU.
Transit Fingerprint
Depth
1.100 %
Duration
4.952 h
Impact parameter b
0.607
Rp / R★
0.113193
Transit midpoint (BJD)
2,454,979.3458
Photometric dip
Transit produces a flux drop of 11,004 ppm lasting ≈ 4.95 h.
Extended Orbital Architecture
Planet / star radius ratio
0.113193
Semi-major axis / stellar radius
113.400
Impact parameter (b)
0.607
Transit mid-time (BJD)
2,454,979.3458
Angular separation (arcsec)
0.83900
Eq. Temperature
240K
(-33 °C)
Insolation (S⊕)
0.79
Earth = 1.00
Earth Similarity (ESI)
0.447
0 = alien, 1 = Earth-identical
Within the conservative habitable zone — surface water would be frozen.
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-1628
Spectral Class
K-type orange
Effective Temperature
3,724 K — cooler than the Sun (5,778 K)
Estimated Age
5.13 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.520 R☉
Stellar Mass
0.550 M☉
Metallicity [Fe/H]
0.17
Extended Stellar Properties
Surface gravity (log g)
4.740 dex
Stellar density
4.313 g/cm³
Systemic radial velocity
-16.36 km/s
Rotational v·sin i
4.30 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Total Proper Motion
12.664 mas/yr
PM Right Ascension
0.20 mas/yr
PM Declination
-12.66 mas/yr
Galactic Cartesian (pc)
x = 0.146 · y = -0.712 · z = 0.687
Equatorial (J2000)
RA 281.63369° · Dec 43.41155°
Galactic ℓ, b
72.706° · 19.099°
Ecliptic λ, β
291.106° · 66.000°
HTM-20 index
-628803141
Similar Worlds
CoRoT-8 b
Neptune-like · K-type orange
Radius 6.39 R⊕ · 1,050.3 ly
TOI-500 d
Neptune-like · K-type orange
Radius 6.35 R⊕ · 154.6 ly
Kepler-56 b
Neptune-like · K-type orange
Radius 6.51 R⊕ · 2,977.8 ly
V1298 Tau d
Neptune-like · K-type orange
Radius 6.53 R⊕ · 352.9 ly
HATS-7 b
Neptune-like · K-type orange
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Kepler-1004 b
Neptune-like · K-type orange
Radius 6.28 R⊕ · 3,759.5 ly