WASP-33b
WASP-33b is an extrasolar planet orbiting the star HD 15082. It was the first planet discovered to orbit a Delta Scuti variable star. With a semimajor axis of 0.026 AU (3.9 million km; 2.4 million mi) and a mass likely greater than Jupiter's, it belongs to the hot Jupiter class of planets.
Limits from radial velocity measurements imply it has less than 4.1 times the mass of Jupiter.
NASA reported the exoplanet has a stratosphere, and the atmosphere contains titanium oxide, which creates the stratosphere. Titanium oxide is one of only a few compounds that is a strong absorber of visible and ultraviolet radiation, which heats the atmosphere, and is able to exist in a gas state in a hot atmosphere. The detection of temperature inversion (stratosphere), water and titanium oxide was disproved with the higher quality data obtained by 2020. Only upper limit of titanium oxide volume mixing rate equal to 1 ppb can be obtained. Later research reconfirmed the existence of titanium oxide in the atmospher
photometry analysis
EXOCLOCK ARIEL PUBLICATION
the star
OBSERVE SETUP - TAKAHASHI CCA-250 / MORAVIAN C3-26000
| First Publication Date | 2006 |
| Method of discovery for the planet | Transit |
| Method of discovery of first planet in system | Transit |
| Orbit Reference | Collier-Cameron 2010 |
| First Reference | Christian 2006 |
| EPE Link | WASP-33 |
| ETD Link | WASP-33 b |
| Exoplanet Archive Link | WASP-33 b |
| SIMBAD Link | HD 15082 |
| Kepler ID | Unavailable |
| KDE | ✗ |
| EOD | ✓ |
| Microlensing | ✗ |
| Imaging | ✗ |
| Timing | ✗ |
| Astrometry | ✗ |
| Msin(i)
[mjupiter]
|
0.0 +4.1/-0 |
| Planet Mass
[mjupiter]
|
0.0 +4.1/-0 |
| Semi-Major Axis
[au]
|
0.02555 ± 0.00043 |
| Separation
[au]
|
0.02555 ± 0.00043 |
| Orbital Period
[day]
|
1.21986983 ± 4.5×10-7 |
| Velocity Semiamplitude
[m/s]
|
0 +590/-0 |
| Orbital Eccentricity | 0 |
| Orbit Inclination
[deg]
|
87.7 ± 1.81 |
| Argument of Periastron
[deg]
|
90 |
| BigΩ
[deg]
|
Unavailable |
| Time of Periastron
[jd]
|
2454590.17948 ± 0.00028 |
| Velocity Slope
[m/s/day]
|
-0.0183 ± 0.0035 |
| Spin-Orbit Misalignment
[deg]
|
-108.8 ± 1 |
| Transit | ✓ |
| Planetary Radius
[rjupiter]
|
1.497 ± 0.045 |
| Epoch of Transit Center | 2454163.22373 ± 0.00026 |
| Duration of Transit
[day]
|
0.11224 ± 0.00084 |
| Impact Parameter | 0.15 +0.1/-0.12 |
| a/R* | 3.81 ± 0.11 |
| Transit Depth | 0.01136 ± 0.000192 |
| Planetary Density
[g/cm^3]
|
0.0012 ± 0.00123 |
| Surface Gravity | Unavailable |
| Distance During Transit | Unavailable |
| RR | Unavailable |
| Reduced Chi Squared | Unavailable |
| # of Observations | 29 |
| RMS of Velocities | Unavailable |
| Frozen Eccentricity Flag | ✗ |
| Flag for linear Trend | ✓ |
| Components | 1 |
| Secondary Eclipse | 1 |
| Secondary eclipse depth in J band | Unavailable |
| Secondary eclipse depth in H band | Unavailable |
| Secondary eclipse depth in Ks band | 0.00244 +0.00027/-0.0002 |
| Secondary eclipse depth in the Kepler photometry band | Unavailable |
| Secondary eclipse depth in 3.6 micron | 0.00260 ± 0.0005 |
| Secondary eclipse depth in 4.5 micron | 0.00410 ± 0.0002 |
| Secondary eclipse depth in 5.8 micron | Unavailable |
| Secondary eclipse depth in 8.0 micron | Unavailable |
| Star Name | WASP-33 |
| Binary Flag | ✗ |
| Mass of Star
[msun]
|
1.495 ± 0.031 |
| Radius of Star
[rsun]
|
1.444 ± 0.034 |
| [Fe/H] | 0.10 ± 0.2 |
| Teff
[k]
|
7430 ± 100 |
| Density of star
[g/cm^3]
|
0.700 ± 0.034 |
| log10(g) | 4.30 ± 0.2 |
| Vsin(i)
[km/s]
|
90 ± 10 |
| Gamma
[km/s]
|
Unavailable |
| V mag | 8.3 |
| B-V | 0.09 |
| 2MASS J | 7.6 |
| 2MASS H | 7.5 |
| 2MASS KS | 7.5 |
| SHK | Unavailable |
| log RHK | Unavailable |
| KP | Unavailable |
| RA (h:m:s) | 02:26:51.059 |
| DEC (d:m:s) | +37:33:01.81 |
| Parallax
[marcsec]
|
8.65 ± 0.8 |
| Distance to Star
[pc]
|
116 +11.8/-9.8 |
| Hipparcos Catalog # | 11397 |
| HD # | 15082 |
| Gliese Catalog # | Unavailable |
| HR # | Unavailable |
| SAO Catalog # | 55561 |