Comet West, March 1976
Comet West was discovered in photographs by Richard West on August 10, 1975. It reached peak brightness in March 1976. During its peak brightness, observers reported that it was bright enough to study during full daylight. Despite its spectacular appearance, it did't cause much expectation among the popular media. The comet has an estimated orbital period of 558,000 years.
NASA has front row seats to image a once-in-a-lifetime comet flyby on Sunday, Oct. 19. Comet C/2013 A1, also known as comet Siding Spring, will pass within about 87,000 miles of Mars -- less than half the distance between Earth and our moon and less than one-tenth the distance of any known comet flyby of Earth. Siding Spring’s nucleus will come closest to Mars around 2:27 p.m. EDT,at about 126,000 mph. This proximity will allow researchers to gather data about Mars' atmosphere.
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