Key parameters at a glance
- A radius of 6.28 Earth radii
- A mass of 32.50 Earth masses
- Surface gravity around 0.82 g
- An orbital period of 5.288 days
- Semi-major axis 0.0679 AU
- Equilibrium temperature 1,661 K (1388 °C)
- Distance from Earth 3,759.53 light-years
- Earth Similarity Index 0.094
- Travel time at Voyager 1 speed 66,299,396 years
- Almost certainly tidally locked to its host star given the close orbit
Kepler-1004 b Planet Profile
Physical Specs
Classification
Planet Type
Neptune-like
Discovery
Size rank in cohort
Rank by radius
#255of 574
top 44.3%
This planet
6.28R⊕
Neptune-like median
6.39R⊕
Nearest-size peers
| Metric | Earth | Kepler-1004 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 6.28 | 11.21 |
| Mass (M⊕) | 1.00 | 32.50 | 317.83 |
| Density (g/cm³) | 5.51 | 0.72 | 1.33 |
| Surface Gravity (g) | 1.00 | 0.82 | 2.53 |
| Insolation (S⊕) | 1.00 | 1,610.09 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 28159194
Gaia DR2
Gaia DR2 2087243952836878080
Gaia DR3
Gaia DR3 2087243952836878080
System
Kepler-1004
Percentile among Neptune-like cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 5.29 Earth days (1.4% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0679 AU.
Transit Fingerprint
Depth
0.034 %
Duration
8.528 h
Impact parameter b
0.577
Rp / R★
0.017122
Transit midpoint (BJD)
2,454,968.3635
Photometric dip
Transit produces a flux drop of 344 ppm lasting ≈ 8.53 h.
Extended Orbital Architecture
Planet / star radius ratio
0.017122
Semi-major axis / stellar radius
3.900
Impact parameter (b)
0.577
Transit mid-time (BJD)
2,454,968.3635
Angular separation (arcsec)
0.05890
Eq. Temperature
1,661K
(1388 °C)
Insolation (S⊕)
1,610.09
Earth = 1.00
Earth Similarity (ESI)
0.094
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched. 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-1004
Spectral Class
K-type orange
Effective Temperature
4,972 K — cooler than the Sun (5,778 K)
Estimated Age
7.76 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
3.390 R☉
Stellar Mass
1.110 M☉
Metallicity [Fe/H]
-0.04
Extended Stellar Properties
Surface gravity (log g)
3.430 dex
Stellar density
0.040 g/cm³
Systemic radial velocity
-38.87 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
0.839 mas
Total Proper Motion
5.198 mas/yr
PM Right Ascension
2.08 mas/yr
PM Declination
4.76 mas/yr
Galactic Cartesian (pc)
x = 0.297 · y = -0.573 · z = 0.764
Equatorial (J2000)
RA 297.35934° · Dec 49.79755°
Galactic ℓ, b
83.258° · 11.796°
Ecliptic λ, β
323.165° · 68.246°
HTM-20 index
-931265910
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