Nova Cygni 1975

D. H. Beattie, T. J. Lee and P. M. Williams, Royal Observatory, Edinburgh, communicate the following infrared observations, made with the 152-cm flux collector on Tenerife: Sept. 13.9 UT, H = 4.81, K = 4.38, L' = 3.20; 16.9, 4.98, 4.42, 2.93; 18.9, 5.27, 4.65, 3.26. (The L' filter is at 3.8 um; its width 1 um.) Further selected recent visual magnitude estimates: Sept. 25.05 UT, 7.4 (C. Sherrod, North Little Rock, Arkansas); 26.94, 7.4 (N. A. v.d. Mey, Soesterberg, The Netherlands); 29.1, 7.5 (J. Bortle, Brooks Observatory); 30.1, 7.8 (Bortle); Oct. 1.08, 7.8 (Sherrod); 2.08, 7.6 (P. Maley, Houston, Texas); 3.12, 7.6 (Maley); 4.08, 7.7 (Maley); 5.08, 7.8 (Maley); 6.05, 7.8 (Maley). Corrigendum. On IAUC 2827, the Wise Observatory observations were made by I. Kupo on Aug. 30.9 UT.