HAT-P-12B
HAT-P-12b is an extrasolar planet approximately 468 light years away from Earth, orbiting the 13th magnitude K-type star HAT-P-12, which is located in Canes Venatici constellation.
HAT-P-12b is a H/He-dominated gas giant planet with a core mass of 11.3+2.6
−2.1 M???? and is moderately irradiated by its low-metallicity host star.Therefore, HAT-P-12b is most likely an H/He-dominated planet with a core of perhaps ~10 M????, and a total metal fraction of ~15%. This makes HAT-P-12b the least massive H/He-dominated gas giant planet found to date
Photometry Analysis
THE STAR
(MOON 99,9% at 48°)
.
EXOCLOCK ARIEL PUBLICATION
THE TRANSIT WAS OBSERVED WITH A REFRACTOR TAKAHASHI TOA-150B
THE STAR OUT FROM TOA
| Other Name | Unavailable |
| First Publication Date | 2009 |
| Method of discovery for the planet | Transit |
| Method of discovery of first planet in system | Transit |
| Orbit Reference | Hartman 2009 |
| First Reference | Hartman 2009 |
| EPE Link | HAT-P-12 |
| ETD Link | HAT-P-12 b |
| Exoplanet Archive Link | HAT-P-12 b |
| SIMBAD Link | HAT-P-12 |
Orbital Parameters
| Msin(i)
[mjupiter]
|
0.211 ± 0.0132 |
| Planet Mass
[mjupiter]
|
0.211 ± 0.0132 |
| Semi-Major Axis
[au]
|
0.03837 ± 0.00064 |
| Separation
[au]
|
0.03837 ± 0.00064 |
| Orbital Period
[day]
|
3.2130598 ± 2.1×10-6 |
| Velocity Semiamplitude
[m/s]
|
35.8 ± 1.9 |
| Orbital Eccentricity | 0 |
| Orbit Inclination
[deg]
|
89.00 ± 0.4 |
| Argument of Periastron
[deg]
|
90 |
| BigΩ
[deg]
|
Unavailable |
| Time of Periastron
[jd]
|
2454419.19560 ± 0.0002 |
| Velocity Slope
[m/s/day]
|
Unavailable |
| Spin-Orbit Misalignment
[deg]
|
Unavailable |
| Transit | ✓ |
Transit Parameters
| Planetary Radius
[rjupiter]
|
0.959 +0.029/-0.021 |
| Epoch of Transit Center | 2454419.19556 ± 0.0002 |
| Duration of Transit
[day]
|
0.09740 ± 0.0006 |
| Impact Parameter | 0.211 ± 0.07 |
| a/R* | 11.80 ± 0.31 |
| Transit Depth | 0.01977 ± 0.000183 |
| Planetary Density
[g/cm^3]
|
0.295 ± 0.025 |
| Surface Gravity | 2.756 ± 0.033 |
| Distance During Transit | Unavailable |
| RR | Unavailable |
Orbital Fit Properties
| Reduced Chi Squared | 1 |
| # of Observations | 22 |
| RMS of Velocities | 4.8 |
| Frozen Eccentricity Flag | ✓ |
| Flag for linear Trend | ✗ |
| Components | 1 |
Stellar Properties
| Star Name | HAT-P-12 |
| Binary Flag | ✗ |
| Mass of Star
[msun]
|
0.730 ± 0.018 |
| Radius of Star
[rsun]
|
0.701 +0.017/-0.012 |
| [Fe/H] | -0.290 ± 0.05 |
| Teff
[k]
|
4650 ± 60 |
| Density of star
[g/cm^3]
|
Unavailable |
| log10(g) | 4.610 ± 0.01 |
| Vsin(i)
[km/s]
|
0.50 ± 0.4 |
| Gamma
[km/s]
|
-40.64 ± 0.125 |
Stellar Magnitudes
| V mag | 12.8 |
| B-V | -0.24 |
| 2MASS J | 10.8 |
| 2MASS H | 10.2 |
| 2MASS KS | 10.1 |
| SHK | Unavailable |
| log RHK | Unavailable |
| KP | Unavailable |
Coordinates and Catalogs
| RA (h:m:s) | 13:57:33.480 |
| DEC (d:m:s) | +43:29:36.7 |
| Parallax
[marcsec]
|
7.02 +0.2/-0.166 |
| Distance to Star
[pc]
|
142.5 +3.5/-4 |
© Efrem Frigeni Astrophoto