OH Observation of Comet Kohoutek (1973f) at 18 CM Wavelength

Summary. The main lines of OH at 18 cm wavelength were observed in Comet Kohoutek (l973f) from December 1973 through February 1974 with the radio telescope. They were detected in absorption in early December and reappeared in emission around mid-January. In a preliminary approach these results are interpreted in terms of U.V. pumping by the sun when the Fraunhofer spectrum is taken into account. Key words: comet Comet Kohoutek (1973f) hydroxyl