Key parameters at a glance
- A radius of 11.56 Earth radii
- A mass of 188.16 Earth masses
- Surface gravity around 1.41 g
- An orbital period of 2.663 days
- Semi-major axis 0.0282 AU
- Equilibrium temperature 2,198 K (1925 °C)
- Distance from Earth 995.75 light-years
- Earth Similarity Index 0.058
- Travel time at Voyager 1 speed 17,560,126 years
- Almost certainly tidally locked to its host star given the close orbit
Wendelstein-1 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1584of 1771
top 89.4%
This planet
11.56R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | Wendelstein-1 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 11.56 | 11.21 |
| Mass (M⊕) | 1.00 | 188.16 | 317.83 |
| Density (g/cm³) | 5.51 | 0.72 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.41 | 2.53 |
| Insolation (S⊕) | 1.00 | 113.61 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 188.155 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 75262942
Gaia DR2
Gaia DR2 1820530778750452096
Gaia DR3
Gaia DR3 1820530778750452096
System
Wendelstein-1
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 2.66 Earth days (0.7% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0282 AU.
Transit Fingerprint
Depth
3.752 %
Duration
1.843 h
Rp / R★
0.169800
Transit midpoint (BJD)
2,455,367.7385
Photometric dip
Transit produces a flux drop of 37,523 ppm lasting ≈ 1.84 h.
Extended Orbital Architecture
Planet / star radius ratio
0.169800
RV semi-amplitude (K)
115.560 m/s
Transit mid-time (BJD)
2,455,367.7385
Angular separation (arcsec)
0.09240
Eq. Temperature
2,198K
(1925 °C)
Insolation (S⊕)
113.61
Earth = 1.00
Earth Similarity (ESI)
0.058
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.
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
Obermeier et al. 2020Instrument
Gigapixel Camera 1 (GPC1)
Publication
2020-07
Observation locale
Ground
Host System: Wendelstein-1
Spectral Class
K-type orange
Effective Temperature
4,251 K — cooler than the Sun (5,778 K)
Estimated Age
—
Stellar Radius
0.610 R☉
Stellar Mass
0.650 M☉
Metallicity [Fe/H]
—
Multi-band Host Photometry — 15 bands
Astrometric Data
Parallax
3.247 mas
Total Proper Motion
4.519 mas/yr
PM Right Ascension
4.13 mas/yr
PM Declination
-1.83 mas/yr
Galactic Cartesian (pc)
x = 0.463 · y = -0.833 · z = 0.302
Equatorial (J2000)
RA 299.05064° · Dec 17.56996°
Galactic ℓ, b
55.998° · -5.678°
Ecliptic λ, β
305.682° · 37.479°
HTM-20 index
1361707664
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