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I identify a point-symmetric morphology composed of three pairs of ears(small lobes) in the X-ray images of the core-collapse supernova remnant(CCSNR) N63A and argue that this morphology supports the jittering jetsexplosion mechanism (JJEM). The opposite two ears in each of the three pairs ofSNR N63A are not equal to each other as one is larger than the other. From themorphology of SNR N63A, I infer that this asymmetry is due to asymmetricalopposite jets at launching. Namely, the newly born neutron star that launchesthe jets that explode the star, does it in many cases with one jet morepowerful than its counter-jet. I propose that this asymmetry results from thatthe accretion disk that launches the jets has no time to fully relax during ajet-launching episode. This implies that if the disk is born with two unequalsides as expected in the JJEM, then during a large fraction, or even all, ofthe jet-launching episode the two sides remain unequal. I also show that themagnetic reconnection timescale, which is about the timescale for the magneticfield to relax, is not much shorter than the jet-launching episode, thereforethe two sides of the accretion disk might have a different magnetic structure.The unequal sides of the accretion disk launch two opposite jets with differentenergy from each other.

Jet - counter-jet asymmetry in the jittering jets explosion mechanism of supernovae