Key parameters at a glance
- A radius of 13.56 Earth radii
- A mass of 270.16 Earth masses
- Surface gravity around 1.47 g
- An orbital period of 2.757 days
- Semi-major axis 0.0400 AU
- Equilibrium temperature 1,650 K (1377 °C)
- Distance from Earth 824.39 light-years
- Earth Similarity Index 0.078
- Travel time at Voyager 1 speed 14,538,093 years
WASP-26 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#660of 1771
top 37.2%
This planet
13.56R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | WASP-26 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 13.56 | 11.21 |
| Mass (M⊕) | 1.00 | 270.16 | 317.83 |
| Density (g/cm³) | 5.51 | 0.70 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.47 | 2.53 |
| Insolation (S⊕) | 1.00 | 1,225.53 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 270.156 M⊕ | Direct mass measurement (not derived). |
Star Catalogue Identifiers
TIC
TIC 32487566
Gaia DR2
Gaia DR2 2416782701664155008
Gaia DR3
Gaia DR3 2416782701664155008
System
WASP-26
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 2.76 Earth days (0.8% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0400 AU.
Transit Fingerprint
Depth
1.000 %
Duration
2.381 h
Impact parameter b
0.830
Rp / R★
0.101100
Transit midpoint (BJD)
2,456,548.8004
Photometric dip
Transit produces a flux drop of 10,000 ppm lasting ≈ 2.38 h.
Extended Orbital Architecture
Planet / star radius ratio
0.101100
Semi-major axis / stellar radius
6.430
Impact parameter (b)
0.830
RV semi-amplitude (K)
135.500 m/s
Transit mid-time (BJD)
2,456,548.8004
Sky-projected obliquity (λ)
-16.00°
Angular separation (arcsec)
0.15800
Eq. Temperature
1,650K
(1377 °C)
Insolation (S⊕)
1,225.53
Earth = 1.00
Earth Similarity (ESI)
0.078
0 = alien, 1 = Earth-identical
Inside the inner HZ boundary (too hot for liquid water) — the dayside is scorched.
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
Smalley et al. 2010Instrument
iKon-L CCD Camera
Publication
2010-09
Observation locale
Ground
Discovery cohort
Planets confirmed in 2010 at SuperWASP (12 shown).
Host System: WASP-26
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
6,034 K — hotter than the Sun (5,778 K)
Estimated Age
6.00 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
1.220 R☉
Stellar Mass
0.860 M☉
Metallicity [Fe/H]
0.16
Extended Stellar Properties
Surface gravity (log g)
4.440 dex
Stellar density
0.660 g/cm³
Systemic radial velocity
8.46 km/s
Rotational v·sin i
2.20 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 11 bands
Astrometric Data
Parallax
3.929 mas
Total Proper Motion
36.689 mas/yr
PM Right Ascension
27.39 mas/yr
PM Declination
-24.41 mas/yr
Galactic Cartesian (pc)
x = 0.962 · y = 0.077 · z = -0.263
Equatorial (J2000)
RA 4.60304° · Dec -15.26740°
Galactic ℓ, b
88.353° · -75.872°
Ecliptic λ, β
357.988° · -15.807°
HTM-20 index
-614867544
Observation Record
RV measurements
1
Emission spectra
3
Archive notes
2
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