Re: Position of RY Ser? USNO A1.0 tells the following r and b magnitudes. Both objects are not, unfortunately, markedly blue. It was unfortunate I missed the chance of multicolor observation on the 1997 outburst(?), just because I noticed the brightening after returning to the office. My identification: USNO0750.10979375 172307.179 -124808.96 (2000.0) 15.7 17.2 Downes et al.: USNO0750.10979650 172307.542 -124744.20 (2000.0) 15.3 16.9 (its close companion) USNO0750.10979746 172307.670 -124741.45 (2000.0) 17.7 19.2 Regards, Taichi Kato