We present results from three world-wide campaigns that resulted in the detections of two single-chord and one multi-chord stellar occultations by the Plutino object ( 84922 ) 2003Â VS _ { 2 } .
From the single-chord occultations in 2013 and 2014 we obtained accurate astrometric positions for the object , while from the multi-chord occultation on November 7th , 2014 , we obtained the parameters of the best-fitting ellipse to the limb of the body at the time of occultation .
We also obtained short-term photometry data for the body in order to derive its rotational phase during the occultation .
The rotational light curve present a peak-to-peak amplitude of 0.141 \pm 0.009 mag .
This allows us to reconstruct the three-dimensional shape of the body , with principal semi-axes a = 313.8 \pm 7.1 km , b = 265.5 ^ { +8.8 } _ { -9.8 } km , and c = 247.3 ^ { +26.6 } _ { -43.6 } km , which is not consistent with a Jacobi triaxial equilibrium figure .
The derived spherical volume equivalent diameter of 548.3 ^ { +29.5 } _ { -44.6 } km is about 5 % larger than the radiometric diameter of 2003Â VS _ { 2 } derived from Herschel data of 523 \pm 35 km , but still compatible with it within error bars .
From those results we can also derive the geometric albedo ( 0.123 ^ { +0.015 } _ { -0.014 } ) and , under the assumption that the object is a Maclaurin spheroid , the density \rho = 1400 ^ { +1000 } _ { -300 } for the plutino .
The disappearances and reappearances of the star during the occultations do not show any compelling evidence for a global atmosphere considering a pressure upper limit of about 1 microbar for a pure nitrogen atmosphere , nor secondary features ( e.g .
rings or satellite ) around the main body .