Hi Ivan,
Congratulations and well done -- I will have a crack at it sometime in the next month.
Have been to the SIMBAD page whcih provides a recessional velocity of -259,486km/sec (just over 86% of c). Given that recessional velocity and Ho assumed at 70.4km/sec/MPc gives a look-back time of 12Gyr (+/- a little bit) -- when the Universe was only about 1.8 Gyrs old or ~13% of its present age.
http://simbad.u-strasbg.fr/simbad/si...bmit=submit+id
Best,
L.