Kohoutek (kŏ-hoo -tek) (1973 XII) A comet discovered in March 1973 by Lubos Kohoutek when he was looking for Biela's comet. At discovery comet Kohoutek was 4.6 AU away from the Sun and early predictions indicated that near perihelion, at its brightest, Kohoutek would reach a magnitude of about –12, comparable with the full Moon. This would make it visible in daylight. Comets however are among the most unpredictable astronomical objects and Kohoutek only just attained naked-eye visibility. It was extensively investigated from Skylab, astronaut Gibson being impressed by its overall orange color and its sunward spike.