Key parameters at a glance
- A radius of 6.18 Earth radii
- A mass of 169.00 Earth masses
- Surface gravity around 4.42 g
- An orbital period of 138.317 days
- Semi-major axis 0.6520 AU
- Equilibrium temperature 481 K (208 °C)
- Distance from Earth 3,369.71 light-years
- Earth Similarity Index 0.352
- Travel time at Voyager 1 speed 59,424,891 years
Circumbinary planet
PH1 b orbits a binary-star pair rather than a single host — a minority architecture in the confirmed catalogue.
PH1 b Planet Profile
Physical Specs
Classification
Planet Type
Neptune-like
Discovery
Size rank in cohort
Rank by radius
#264of 574
top 45.8%
This planet
6.18R⊕
Neptune-like median
6.39R⊕
Nearest-size peers
| Metric | Earth | PH1 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 6.18 | 11.21 |
| Mass (M⊕) | 1.00 | 169.00 | 317.83 |
| Density (g/cm³) | 5.51 | — | 1.33 |
| Surface Gravity (g) | 1.00 | 4.42 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 169.000 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 170348142
Gaia DR2
Gaia DR2 2073478823183937536
Gaia DR3
Gaia DR3 2073478823183937536
System
PH1
Percentile among Neptune-like cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 138.32 Earth days (37.9% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.6520 AU.
Transit Fingerprint
Rp / R★
0.032680
Transit midpoint (BJD)
2,455,074.4900
Extended Orbital Architecture
Planet / star radius ratio
0.032680
Semi-major axis / stellar radius
22.144
Transit mid-time (BJD)
2,455,074.4900
Long. of periastron (ω)
341.88°
Angular separation (arcsec)
0.63100
Eq. Temperature
481K
(208 °C)
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.352
0 = alien, 1 = Earth-identical
Insufficient insolation data — the surface is too hot to retain surface water.
Detection Signatures
Transit photometry
A transit dip has been observed from at least one telescope.
Radial velocity
Stellar wobble has been measured spectroscopically.
Discovery Paper
Primary reference
Schwamb et al. 2013Instrument
Kepler CCD Array
Publication
2013-05
Observation locale
Space
Discovery cohort
Planets confirmed in 2012 at Kepler (12 shown).
Host System: PH1
Spectral Class
F-type yellow-white
Effective Temperature
6,407 K — hotter than the Sun (5,778 K)
Estimated Age
2.00 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.734 R☉
Stellar Mass
1.528 M☉
Metallicity [Fe/H]
0.21
Extended Stellar Properties
Surface gravity (log g)
4.140 dex
Stellar density
0.293 g/cm³
Systemic radial velocity
21.19 km/s
Rotational v·sin i
32.60 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
0.455 mas
Total Proper Motion
1.095 mas/yr
PM Right Ascension
0.28 mas/yr
PM Declination
1.06 mas/yr
Galactic Cartesian (pc)
x = 0.362 · y = -0.675 · z = 0.642
Equatorial (J2000)
RA 298.21506° · Dec 39.95509°
Galactic ℓ, b
74.869° · 6.440°
Ecliptic λ, β
314.849° · 59.079°
HTM-20 index
-573525947
Similar Worlds
Kepler-450 b
Neptune-like · F-type yellow-white
Radius 6.14 R⊕ · 1,487.2 ly
Kepler-820 b
Neptune-like · F-type yellow-white
Radius 6.09 R⊕ · 4,524.4 ly
KIC 5437945 b
Neptune-like · F-type yellow-white
Radius 6.40 R⊕ · 4,155.3 ly
TOI-6038 A b
Neptune-like · F-type yellow-white
Radius 6.41 R⊕ · 584.3 ly
Kepler-1755 b
Neptune-like · F-type yellow-white
Radius 5.92 R⊕ · 3,204.1 ly
TOI-1052 c
Neptune-like · F-type yellow-white
Radius 6.48 R⊕ · 423.4 ly