RS Ophiuchi is a supernova whose recurrent is produced by a white dwarf star and a red giant in a binary system.
Theese are my calculations:
COMPARING WITH OTHER SCIENTIFICS
According to Izumi Hachisu, Mariko Kato and Gerardo Juan Manuel Luna, in RS Oph there is presence of hydrogen. R. M. Hjellming, J. H. van Gorkom, A. R. Taylor agree. On the other hand, F. Patat, N. N. Chugai, Ph. Podsiadlowski and others, affirm the existence of helium, iron, calcium, sodium and potassium. In my case, I found completely different chemical elements, basing on the Table 1-1 (in MATERIALS AND METHODS).