Key parameters at a glance
- A radius of 3.20 Earth radii
- A mass of 10.30 Earth masses
- Surface gravity around 1.01 g
- An orbital period of 12.206 days
- Semi-major axis 0.1016 AU
- Equilibrium temperature 895 K (622 °C)
- Distance from Earth 1,349.87 light-years
- Earth Similarity Index 0.255
- Travel time at Voyager 1 speed 23,804,985 years
1 sibling around Kepler-1642
Kepler-1642 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-1642 c | Sub-Neptune | 2.66 | 7.56 | 6.651 | 1,095 | 2016 |
| Kepler-1642 b this | Sub-Neptune | 3.20 | 10.30 | 12.206 | 895 | 2016 |
Kepler-1642 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#348of 1978
top 17.5%
This planet
3.20R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-1642 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 3.20 | 11.21 |
| Mass (M⊕) | 1.00 | 10.30 | 317.83 |
| Density (g/cm³) | 5.51 | 1.73 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.01 | 2.53 |
| Insolation (S⊕) | 1.00 | 39.92 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 273036122
Gaia DR2
Gaia DR2 2078758433192866816
Gaia DR3
Gaia DR3 2078758433192866816
System
Kepler-1642
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 12.21 Earth days (3.3% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.1016 AU.
Transit Fingerprint
Depth
0.151 %
Duration
2.454 h
Impact parameter b
0.322
Rp / R★
0.035267
Transit midpoint (BJD)
2,454,967.1296
Photometric dip
Transit produces a flux drop of 1,515 ppm lasting ≈ 2.45 h.
Extended Orbital Architecture
Planet / star radius ratio
0.035267
Semi-major axis / stellar radius
39.810
Impact parameter (b)
0.322
Transit mid-time (BJD)
2,454,967.1296
Angular separation (arcsec)
0.24500
Eq. Temperature
895K
(622 °C)
Insolation (S⊕)
39.92
Earth = 1.00
Earth Similarity (ESI)
0.255
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-1642
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,355 K — cooler than the Sun (5,778 K)
Estimated Age
4.47 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.840 R☉
Stellar Mass
0.880 M☉
Metallicity [Fe/H]
-0.01
Extended Stellar Properties
Surface gravity (log g)
4.540 dex
Stellar density
5.966 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
2.387 mas
Total Proper Motion
12.640 mas/yr
PM Right Ascension
-1.86 mas/yr
PM Declination
12.50 mas/yr
Galactic Cartesian (pc)
x = 0.331 · y = -0.644 · z = 0.690
Equatorial (J2000)
RA 297.21212° · Dec 43.64379°
Galactic ℓ, b
77.726° · 8.920°
Ecliptic λ, β
316.325° · 62.774°
HTM-20 index
2042378260
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