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

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