Alpha Monocerotids

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The Alpha Monocerotids is a meteor shower with the international acronym AMO active in November, not to be confused with the December Monocerotids, international acronym MON. The swarm is visible from 15 to 25 November of every year; its peak occurs on 21 or 22 November. The speed of its meteors is 65 km/s. Normally it has a low ZHR but on some occasions it origins remarkable meteor rains, that have the characteristic to last less than an hour: such type of rains, named outburst, have been observed in 1925, 1935, 1985 and 1995. Peter Jenniskens predicted the return of 1995 based on the hypothesis that these outbursts were caused by the dust trail of a long period comet occasionally wandering in Earth's path due to planetary perturbations. During observations in southern Spain, assisted by a team of observers of the Dutch Meteor Society, he confirmed that the meteoroids were moving in a long-period comet orbit. The outburst of 1995 has allowed to exactly determine the radiant of the swarm and the solar longitude of its peak beyond confirming the effective brevity of outburst of the Alpha Monocerotids, less than an hour. The parent body, probably a long-period comet, is unknown.[1]

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  1. ^ Jenniskens, P.; Betlem, H.; De Lignie, M.; Langbroek, M. (1997). "The Detection of a Dust Trail in the Orbit of an Earth-threatening Long-Period Comet". Astrophysical Journal 479: 441. Bibcode:1997ApJ...479..441J. doi:10.1086/303853. 

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