Bappu, M. K. V; Sivaraman, K. R
(Kodaikanal Obsevatory, 1966-12)
Spectroscopic observations of Comet Ikeya-Seki (1965f) with slit and slitless instruments are described. Sodium emission in the coma is seen from October 9 to November 1. A sodium tail extending upto 2 degree from the ...