Thanks to everyone who posted replies about the position of RY Ser. Everything is quite clear now! It is curious, that the first edition (1993) of the Downes and Shara CV atlas gives a reference to the 1991 Russian atlas of cataclysmic variables by Khruzina and Shugarov, yet D&S considered that RY Ser could not be identified using the Russian chart. I have had a look at the Russian chart, and I find that it shows RY Ser correctly. Apart from an incorrect scale bar, the main hindrance appears to be messy artwork. Nine comparison stars are labelled, but the listed photographic magnitudes seem to be badly out in many cases. A chart for RY & RX Ser also appears in the variable star atlas by Tsesevich and Kazanasmas (1971). This chart may be useful when the variable is near maximum, but probably not useful at minimum. Refs: Downes, Ronald A, & Shara, Michael M. 1993, PASP 105:127-245, A Catalog and Atlas of Cataclysmic Variables. Khruzina, T.S. and Shugarov, S. Yu. 1991, Atlas of Cataclysmic Variables. U Geminorum Stars. Tsesevich, V.P., and Kazanasmas, M.S. 1971, Atlas of Finding Charts of Variable Stars (Moscow, Acad. Sci. USSR). Regards, /Mati /=====================================\ | MOREL ASTROGRAPHICS | | Stellar Data & Information Centre | | c/o M. Morel | | 6 Blakewell Road, | | Thornton NSW 2322 AUSTRALIA | | Tel./fax: (02) 4966 2078 | | 151d38'33" E, 32d46'47"S | | e-mail: morel@ozemail.com.au | \=====================================/