Complex sentence: RR Telescopii is a symbiotic nova in the constellation Telescopium which had been variable between photographic magnitude (m pg) 12.5 to 16.6 from 1889 to 1944.
Split into simpler sentences: RR Telescopii is a symbiotic nova in the constellation Telescopium. It was seen to be variable between photographic magnitude (m pg) 12.5 to 16.6 from 1889 to 1944.