Key parameters at a glance
- A radius of 12.33 Earth radii
- A mass of 276.51 Earth masses
- Surface gravity around 1.82 g
- An orbital period of 2.424 days
- Semi-major axis 0.0345 AU
- Equilibrium temperature 1,337 K (1064 °C)
- Distance from Earth 1,188.88 light-years
- Earth Similarity Index 0.104
- Travel time at Voyager 1 speed 20,965,858 years
WASP-44 b Planet Profile
Physical Specs
Classification
Planet Type
Gas Giant
Discovery
Size rank in cohort
Rank by radius
#1341of 1771
top 75.7%
This planet
12.33R⊕
Gas Giant median
13.52R⊕
Nearest-size peers
| Metric | Earth | WASP-44 b | Jupiter |
|---|---|---|---|
| Radius (R⊕) | 1.00 | 12.33 | 11.21 |
| Mass (M⊕) | 1.00 | 276.51 | 317.83 |
| Density (g/cm³) | 5.51 | 0.81 | 1.33 |
| Surface Gravity (g) | 1.00 | 1.82 | 2.53 |
| Insolation (S⊕) | 1.00 | 533.00 | 0.037 |
Alternative Mass Estimates
| Method | Value | Interpretation |
|---|---|---|
| Best measured mass | 276.512 M⊕ | Direct mass measurement (not derived). |
| Minimum mass (M sin i) | 276.194 M⊕ | Lower bound from radial-velocity fitting. |
| Computed mass | 276.800 M⊕ | Model-computed mass (e.g. from mass-radius relation). |
Star Catalogue Identifiers
TIC
TIC 12862099
Gaia DR2
Gaia DR2 2424406513428936832
Gaia DR3
Gaia DR3 2424406513428936832
System
WASP-44
Percentile among Gas Giant cohort
Orbit & Habitability
Orbital Dynamics
Year Length
A year here lasts approximately 2.42 Earth days (0.7% of a terrestrial year) on a nearly circular orbit at a mean orbital distance of 0.0345 AU.
Transit Fingerprint
Depth
1.560 %
Duration
2.237 h
Impact parameter b
0.541
Rp / R★
0.124800
Transit midpoint (BJD)
2,458,338.1024
Photometric dip
Transit produces a flux drop of 15,600 ppm lasting ≈ 2.24 h.
Extended Orbital Architecture
Planet / star radius ratio
0.124800
Semi-major axis / stellar radius
8.200
Impact parameter (b)
0.541
RV semi-amplitude (K)
138.000 m/s
Transit mid-time (BJD)
2,458,338.1024
Angular separation (arcsec)
0.09470
Eq. Temperature
1,337K
(1064 °C)
Insolation (S⊕)
533.00
Earth = 1.00
Earth Similarity (ESI)
0.104
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
Anderson et al. 2011Instrument
iKon-L CCD Camera
Publication
2012-05
Observation locale
Ground
Discovery cohort
Planets confirmed in 2011 at SuperWASP (8 shown).
Host System: WASP-44
Spectral Class
G-type yellow (Sun-like)
Effective Temperature
5,420 K — cooler than the Sun (5,778 K)
Estimated Age
10.30 Gyr — older than the Sun (4.6 Gyr)
Stellar Radius
0.906 R☉
Stellar Mass
0.935 M☉
Metallicity [Fe/H]
0.00
Extended Stellar Properties
Surface gravity (log g)
4.494 dex
Stellar density
1.770 g/cm³
Systemic radial velocity
-4.04 km/s
Rotational v·sin i
3.20 km/s
Metallicity ratio
[Fe/H]
Multi-band Host Photometry — 16 bands
Astrometric Data
Parallax
2.715 mas
Total Proper Motion
33.710 mas/yr
PM Right Ascension
15.28 mas/yr
PM Declination
-30.05 mas/yr
Galactic Cartesian (pc)
x = 0.976 · y = 0.067 · z = -0.207
Equatorial (J2000)
RA 3.90327° · Dec -11.93826°
Galactic ℓ, b
92.238° · -72.639°
Ecliptic λ, β
358.753° · -12.491°
HTM-20 index
-1174853509
Similar Worlds
Kepler-730 b
Gas Giant · G-type yellow (Sun-like)
Radius 12.33 R⊕ · 6,311.2 ly
WASP-41 b
Gas Giant · G-type yellow (Sun-like)
Radius 12.33 R⊕ · 532.8 ly
NGTS-15 b
Gas Giant · G-type yellow (Sun-like)
Radius 12.33 R⊕ · 2,565.2 ly
TOI-4961 b
Gas Giant · G-type yellow (Sun-like)
Radius 12.34 R⊕ · 695.0 ly
Kepler-30 c
Gas Giant · G-type yellow (Sun-like)
Radius 12.30 R⊕ · 2,981.8 ly
HAT-P-13 c
Gas Giant · G-type yellow (Sun-like)
Radius 12.30 R⊕ · 805.0 ly