Key parameters at a glance
- A radius of 12.99 Earth radii
- A mass of 232.33 Earth masses
- Surface gravity around 1.38 g
- An orbital period of 1.752 days
- Semi-major axis 0.0234 AU
- Equilibrium temperature 2,470 K (2197 °C)
- Distance from Earth 1,844.55 light-years
- Earth Similarity Index 0.047
- Travel time at Voyager 1 speed 32,528,565 years
- Almost certainly tidally locked to its host star given the close orbit
Wendelstein-2 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1007of 1771
top 56.8%
This planet
12.99R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | Wendelstein-2 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 12.99 | 11.21 |
| Mass (M⊕) | 1.00 | 232.33 | 317.83 |
| Density (g/cm³) | 5.51 | 0.62 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.38 | 2.53 |
| Insolation (S⊕) | 1.00 | 282.31 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 232.334 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 209752908
Gaia DR2
Gaia DR2 1820764455009323392
Gaia DR3
Gaia DR3 1820764455009323392
System
Wendelstein-2
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 1.75 Earth days (0.5% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0234 AU.
Transit Fingerprint
Depth
7.763 %
Duration
2.171 h
Rp / R★
0.176000
Transit midpoint (BJD)
2,455,679.2544
Photometric dip
Transit produces a flux drop of 77,630 ppm lasting ≈ 2.17 h.
Extended Orbital Architecture
Planet / star radius ratio
0.176000
RV semi-amplitude (K)
155.584 m/s
Transit mid-time (BJD)
2,455,679.2544
Angular separation (arcsec)
0.04140
Eq. Temperature
2,470K
(2197 °C)
Insolation (S⊕)
282.31
Earth = 1.00
Earth Similarity (ESI)
0.047
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-2
Spectral Class
K-type orange
Effective Temperature
4,591 K — cooler than the Sun (5,778 K)
Estimated Age
—
Stellar Radius
0.660 R☉
Stellar Mass
0.730 M☉
Metallicity [Fe/H]
—
Multi-band Host Photometry — 15 bands
Astrometric Data
Parallax
1.741 mas
Total Proper Motion
9.368 mas/yr
PM Right Ascension
8.95 mas/yr
PM Declination
2.75 mas/yr
Galactic Cartesian (pc)
x = 0.446 · y = -0.846 · z = 0.291
Equatorial (J2000)
RA 297.79092° · Dec 16.91257°
Galactic ℓ, b
54.816° · -4.977°
Ecliptic λ, β
304.017° · 37.127°
HTM-20 index
-1275544139
Similar Worlds
WASP-107 c
Gas Giant · K-type orange
Radius 13.00 R⊕ · 211.2 ly
HD 1605 c
Gas Giant · K-type orange
Radius 13.00 R⊕ · 289.6 ly
HD 86950 b
Gas Giant · K-type orange
Radius 13.00 R⊕ · 684.4 ly
HD 174205 b
Gas Giant · K-type orange
Radius 13.00 R⊕ · 763.3 ly
CI Tau c
Gas Giant · K-type orange
Radius 13.00 R⊕ · 515.3 ly
HD 95872 b
Gas Giant · K-type orange
Radius 13.00 R⊕ · 235.5 ly