The graphic shows the emission line spectrum of quasar 3C273 in Virgo compared to the hydrogen absorption lines in nearby Vega used as a 'static' reference.
The quasar shows a line shift redwards (z) averaging 0.16 or approx. 16% the velocity of light - eg; about 48,000km/sec in recession - close to professional results.

Allowing for the varying Ho constant (!), 3C273 is assumed to be about 3BLYs away.

This spectrum may be an amateur first to show a cosmological redshift !

WPO - Surrey - UK