the second independent discovery was made on may 21 by air france pilot emilio ortiz, from a location about 400 km east of madagascar. ortiz saw the comet from his cockpit, and reported a magnitude of 0.5 to 1.0 and a tail about 5–8° long. a few hours later, carlos bolelli, a technician at the cerro tololo inter-american observatory in chile became the third independent discoverer of the comet, although he saw only the tail, as the head was beneath the horizon.