Key parameters at a glance
- A radius of 2.19 Earth radii
- A mass of 5.43 Earth masses
- Surface gravity around 1.13 g
- An orbital period of 10.132 days
- Semi-major axis 0.0756 AU
- Equilibrium temperature 574 K (301 °C)
- Distance from Earth 2,149.37 light-years
- Earth Similarity Index 0.460
- Travel time at Voyager 1 speed 37,904,103 years
- Almost certainly tidally locked to its host star given the close orbit
Kepler-1042 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1691of 1978
top 85.4%
This planet
2.19R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-1042 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.19 | 11.21 |
| Mass (M⊕) | 1.00 | 5.43 | 317.83 |
| Density (g/cm³) | 5.51 | 2.84 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.13 | 2.53 |
| Insolation (S⊕) | 1.00 | 25.66 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 121734006
Gaia DR2
Gaia DR2 2101233898269847296
Gaia DR3
Gaia DR3 2101233898269847296
System
Kepler-1042
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 10.13 Earth days (2.8% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0756 AU.
Transit Fingerprint
Depth
0.091 %
Duration
3.138 h
Impact parameter b
0.030
Rp / R★
0.028226
Transit midpoint (BJD)
2,454,965.9102
Photometric dip
Transit produces a flux drop of 912 ppm lasting ≈ 3.14 h.
Extended Orbital Architecture
Planet / star radius ratio
0.028226
Semi-major axis / stellar radius
25.090
Impact parameter (b)
0.030
Transit mid-time (BJD)
2,454,965.9102
Angular separation (arcsec)
0.11500
Eq. Temperature
574K
(301 °C)
Insolation (S⊕)
25.66
Earth = 1.00
Earth Similarity (ESI)
0.460
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-1042
Spectral Class
K-type orange
Effective Temperature
4,815 K — cooler than the Sun (5,778 K)
Estimated Age
4.79 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.720 R☉
Stellar Mass
0.750 M☉
Metallicity [Fe/H]
-0.10
Extended Stellar Properties
Surface gravity (log g)
4.610 dex
Stellar density
2.912 g/cm³
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
2.001 mas
Total Proper Motion
5.306 mas/yr
PM Right Ascension
-0.73 mas/yr
PM Declination
-5.26 mas/yr
Galactic Cartesian (pc)
x = 0.246 · y = -0.728 · z = 0.640
Equatorial (J2000)
RA 288.66894° · Dec 39.82399°
Galactic ℓ, b
71.324° · 12.876°
Ecliptic λ, β
300.771° · 61.284°
HTM-20 index
-122177451
Similar Worlds
TOI-880.02
Sub-Neptune · K-type orange
Radius 2.19 R⊕ · 197.9 ly
Kepler-1630 b
Sub-Neptune · K-type orange
Radius 2.19 R⊕ · 1,080.3 ly
Kepler-174 d
Sub-Neptune · K-type orange
Radius 2.19 R⊕ · 1,254.9 ly
K2-254 c
Sub-Neptune · K-type orange
Radius 2.19 R⊕ · 742.9 ly
K2-247 c
Sub-Neptune · K-type orange
Radius 2.19 R⊕ · 841.9 ly
Kepler-57 c
Sub-Neptune · K-type orange
Radius 2.20 R⊕ · 2,100.9 ly