Key parameters at a glance
- A radius of 17.93 Earth radii
- A mass of 3,178.28 Earth masses
- Surface gravity around 9.88 g
- Semi-major axis 14.0000 AU
- Equilibrium temperature 2,050 K (1777 °C)
- Distance from Earth 440.01 light-years
- Earth Similarity Index 0.066
- Travel time at Voyager 1 speed 7,759,528 years
1 sibling around WISPIT 2
WISPIT 2 c 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 |
|---|---|---|---|---|---|---|
| WISPIT 2 c this | Gas Giant | 17.93 | 3,178.28 | — | 2,050 | 2026 |
| WISPIT 2 b | Gas Giant | 17.93 | 1,541.47 | — | — | 2025 |
WISPIT 2 c Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#76of 1771
top 4.2%
This planet
17.93R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | WISPIT 2 c | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 17.93 | 11.21 |
| Mass (M⊕) | 1.00 | 3,178.28 | 317.83 |
| Density (g/cm³) | 5.51 | 3.03 | 1.33 |
| Surface Gravity (g) | 1.00 | 9.88 | 2.53 |
| Insolation (S⊕) | 1.00 | — | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 3,178.284 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 98898373
Gaia DR2
Gaia DR2 4207586980945067648
Gaia DR3
Gaia DR3 4207586980945067648
System
WISPIT 2
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
Orbital period for this planet has not yet been measured.
Eq. Temperature
2,050K
(1777 °C)
Insolation (S⊕)
—
Earth = 1.00
Earth Similarity (ESI)
0.066
0 = alien, 1 = Earth-identical
Insufficient insolation data — the dayside is scorched.
Discovery Paper
Primary reference
Lawlor et al. 2026Instrument
Multiple Instruments
Publication
2026-04
Observation locale
Ground
Discovery cohort
Planets confirmed in 2026 at Multiple Observatories (12 shown).
Host System: WISPIT 2
Spectral Class
K-type orange
Effective Temperature
4,530 K — cooler than the Sun (5,778 K)
Estimated Age
0.01 Gyr — younger than the Sun (4.6 Gyr)
Stellar Radius
1.300 R☉
Stellar Mass
1.080 M☉
Metallicity [Fe/H]
—
Extended Stellar Properties
Surface gravity (log g)
4.100 dex
Stellar density
0.467 g/cm³
Rotation period
4.70 days
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
7.388 mas
Total Proper Motion
27.572 mas/yr
PM Right Ascension
6.79 mas/yr
PM Declination
-26.72 mas/yr
Galactic Cartesian (pc)
x = 0.352 · y = -0.926 · z = -0.134
Equatorial (J2000)
RA 290.82100° · Dec -7.68208°
Galactic ℓ, b
29.644° · -10.551°
Ecliptic λ, β
291.306° · 14.230°
HTM-20 index
1811606766
Similar Worlds
WISPIT 2 b
Gas Giant · K-type orange
Radius 17.93 R⊕ · 440.0 ly
WASP-177 b
Gas Giant · K-type orange
Radius 17.71 R⊕ · 576.7 ly
1RXS J160929.1-210524 b
Gas Giant · K-type orange
Radius 18.65 R⊕ · 453.8 ly
TOI-5143 c
Gas Giant · K-type orange
Radius 16.25 R⊕ · 591.6 ly
TOI-2669 b
Gas Giant · K-type orange
Radius 19.73 R⊕ · 1,283.2 ly
GSC 06214-00210 b
Gas Giant · K-type orange
Radius 20.18 R⊕ · 353.9 ly