Magnetar! Zaurak Star? Teer Star I named it, Rainbow disk of all colours pulsating in less than half a second.
Teer is Arrow as it was pulsating right through my eyes right in the centre so then I tried to zoom but mobile phone camera can only do so much, hence calling it Teer.
This is not atmospheric light disturbance and no one can be convinced of that if one looks for them self. Few years back in 2014,15 also noticed the same Teer Star looking towards south in central Australia until last year July in Sydney where I catched it again then again couple of weeks ago.