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Andromedids: See a forgotten meteor bathe brought on by a lifeless comet this weekend

December 1, 2023
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Andromedids: See a forgotten meteor bathe brought on by a lifeless comet this weekend
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A color lithograph from 1877 depicts the Andromedid meteor bathe of 1872

Antiqua Print Gallery/Alamy

A “misplaced” meteor bathe might shock skywatchers this weekend, astronomers have discovered, with the potential for as many as 200 meteors per hour on 2 December.

The bathe in query is the Andromedids, which is brought on by mud and rocks left behind by the comet 3D/Biela getting into Earth’s environment and burning up. In most years the Andromedids barely produce extra meteors than you may anticipate on a median night of stargazing. However every now and then, they kick off.

Information present that the Andromedids in 1872 and 1885 have been notably spectacular, with greater than 1000 meteors in an hour. The final time the bathe was energetic was in 2011, producing about 50 meteors per hour.

The explanation for this inconsistency is the loss of life of comet 3D/Biela. The comet was first noticed in 1772, after which once more in 1852, when it had cut up into two items, and has by no means been seen once more. It appears to have disintegrated, which triggered the notably vivid showers within the late 1800s.

However there’s nonetheless a path left behind by the comet’s authentic path, which Earth, every now and then, finds itself flying by means of. This occurs not often as a result of the particles and dirt left by the comet are transferring, alongside orbits just like the comet. “It takes the meteoroids 6.7 years to orbit the solar,” says Robert Weryk, on the College of Hawaiʻi at Mānoa. “Earth isn’t in the identical place on the identical time.”

This yr may very well be a kind of occasions. In a paper in 2012, astronomers from the College of Western Ontario in Canada, together with Weryk, simulated the motion of the mud path. The mannequin predicted we may very well be in for as many as 200 meteor per hour, peaking on 2 December.

Final yr, the astronomers began engaged on a refined mannequin, and located the brand new one disagrees with the unique prediction of a robust outburst this yr. “The important issue is the orbital trajectory of the comet within the 1600s” says Paul Wiegert, who led the analysis. “We have now to extrapolate backwards in time to find out its earlier place, and the impact of forces because of cometary jets could be very laborious to foretell.”

However, Wiegert is trying ahead to looking forward to the outburst. “All our accessible meteor detections gear, cameras and radar, is watching in anticipation,” he says.

To observe the meteor bathe your self, you don’t want any gear. The Andromedids is called after Andromeda, the constellation from which the notably vivid shows within the 1800s appeared to come back from. However this yr, the meteors are anticipated to radiate from close by Cassiopeia.

You don’t must know easy methods to discover Cassiopeia to see the bathe, however it’s a simple constellation to identify. To search out Cassiopeia, irrespective of the place or when you find yourself trying, an excellent place to start out is by going through north – Cassiopeia received’t be far-off. It’s a small, distinctive W or M formed group of 5 brights stars. The very best time to observe meteor showers is often after midnight, wherever you’re.

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