"S5 0153+74" - Quasar
With a redshift of z=2.34 the light travel time is almost exactly 11.0 billion years, which puts "S5 0153+74" on rank 14 of my list of the most
distant quasars. The "Comoving Radial Distance" is even 18.9 billion light-years.
If you convert the absolute magnitude of M= -30.5mag, you get a luminosity of 130 trillion suns, which is almost unimaginable. Even at a
distance of 100,000 light-years, the quasar would still shine as bright as the full moon in the firmament.
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Observing "S5 0153+74" proved to be very difficult even with my 20" f/3.2 Dobsonian. At a magnification of nearly 300x I could see
the quasar only a few times during a period of 10 minutes. In this respect the observation is to be classified as a little uncertain.
Just west of "S5 0153+74" is a faint star, so the QSO appeared slightly elongated in the few moments of flashing. However, a separation of the
two components was not possible.
