Key parameters at a glance
- A radius of 2.10 Earth radii
- A mass of 5.06 Earth masses
- Surface gravity around 1.15 g
- An orbital period of 5.448 days
- Semi-major axis 0.0605 AU
- Equilibrium temperature 978 K (705 °C)
- Distance from Earth 975.55 light-years
- Earth Similarity Index 0.273
- Travel time at Voyager 1 speed 17,203,746 years
1 sibling around Kepler-1312
Kepler-1312 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-1312 c | Rocky Terrestrial | 1.03 | 1.07 | 1.116 | 1,659 | 2021 |
| Kepler-1312 b this | Sub-Neptune | 2.10 | 5.06 | 5.448 | 978 | 2016 |
Kepler-1312 b Planet Profile
Physical Specs
Classification
Planet Type
Sub-Neptune
Discovery
Size rank in cohort
Rank by radius
#1818of 1978
top 91.9%
This planet
2.10R⊕
Sub-Neptune median
2.71R⊕
Nearest-size peers
| Metric | Earth | Kepler-1312 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 2.10 | 11.21 |
| Mass (M⊕) | 1.00 | 5.06 | 317.83 |
| Density (g/cm³) | 5.51 | 3.00 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.15 | 2.53 |
| Insolation (S⊕) | 1.00 | 219.12 | 0.037 |
Star Catalogue Identifiers
TIC
TIC 137899873
Gaia DR2
Gaia DR2 2053550106200274688
Gaia DR3
Gaia DR3 2053550106200274688
System
Kepler-1312
Percentile among Sub-Neptune cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 5.45 Earth days (1.5% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0605 AU.
Transit Fingerprint
Depth
0.053 %
Duration
2.225 h
Impact parameter b
0.101
Rp / R★
0.021086
Transit midpoint (BJD)
2,454,965.4903
Photometric dip
Transit produces a flux drop of 529 ppm lasting ≈ 2.23 h.
Extended Orbital Architecture
Planet / star radius ratio
0.021086
Semi-major axis / stellar radius
19.020
Impact parameter (b)
0.101
Transit mid-time (BJD)
2,454,965.4903
Angular separation (arcsec)
0.20200
Eq. Temperature
978K
(705 °C)
Insolation (S⊕)
219.12
Earth = 1.00
Earth Similarity (ESI)
0.273
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-1312
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,719 K — cooler than the Sun (5,778 K)
Estimated Age
2.00 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
0.920 R☉
Stellar Mass
0.990 M☉
Metallicity [Fe/H]
-0.02
Extended Stellar Properties
Surface gravity (log g)
4.510 dex
Stellar density
1.340 g/cm³
Systemic radial velocity
-8.41 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
3.315 mas
Total Proper Motion
9.466 mas/yr
PM Right Ascension
8.29 mas/yr
PM Declination
-4.57 mas/yr
Galactic Cartesian (pc)
x = 0.294 · y = -0.694 · z = 0.657
Equatorial (J2000)
RA 292.97128° · Dec 41.03575°
Galactic ℓ, b
73.896° · 10.457°
Ecliptic λ, β
308.053° · 61.474°
HTM-20 index
1756856439
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