Key parameters at a glance
- A radius of 3.24 Earth radii
- A mass of 10.60 Earth masses
- Surface gravity around 1.01 g
- An orbital period of 8.361 days
- Semi-major axis 0.0744 AU
- Equilibrium temperature 690 K (417 °C)
- Distance from Earth 1,595.73 light-years
- Earth Similarity Index 0.331
- Travel time at Voyager 1 speed 28,140,662 years
- Almost certainly tidally locked to its host star given the close orbit
Kepler-742 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#320of 1978
top 16.1%
This planet
3.24R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-742 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 3.24 | 11.21 |
| Mass (M⊕) | 1.00 | 10.60 | 317.83 |
| Density (g/cm³) | 5.51 | 1.71 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.01 | 2.53 |
| Insolation (S⊕) | 1.00 | 38.10 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 164558468
Gaia DR2
Gaia DR2 2107547603271136896
Gaia DR3
Gaia DR3 2107547603271136896
System
Kepler-742
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 8.36 Earth days (2.3% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0744 AU.
Transit Fingerprint
Depth
0.204 %
Duration
2.702 h
Impact parameter b
0.383
Rp / R★
0.042117
Transit midpoint (BJD)
2,455,008.6449
Photometric dip
Transit produces a flux drop of 2,040 ppm lasting ≈ 2.70 h.
Extended Orbital Architecture
Planet / star radius ratio
0.042117
Semi-major axis / stellar radius
22.930
Impact parameter (b)
0.383
Transit mid-time (BJD)
2,455,008.6449
Angular separation (arcsec)
0.15200
Eq. Temperature
690K
(417 °C)
Insolation (S⊕)
38.10
Earth = 1.00
Earth Similarity (ESI)
0.331
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-742
Spectral Class
K-type orange
Effective Temperature
4,642 K — cooler than the Sun (5,778 K)
Estimated Age
2.57 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.710 R☉
Stellar Mass
0.760 M☉
Metallicity [Fe/H]
0.07
Extended Stellar Properties
Surface gravity (log g)
4.620 dex
Stellar density
3.262 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
2.015 mas
Total Proper Motion
12.566 mas/yr
PM Right Ascension
-4.46 mas/yr
PM Declination
11.75 mas/yr
Galactic Cartesian (pc)
x = 0.164 · y = -0.665 · z = 0.729
Equatorial (J2000)
RA 283.86597° · Dec 46.78965°
Galactic ℓ, b
76.630° · 18.762°
Ecliptic λ, β
297.146° · 68.926°
HTM-20 index
-1010574566
Similar Worlds
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TOI-2093 b
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TOI-5704 b
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Kepler-287 c
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Kepler-472 b
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