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States » SouthPosted at: Nov 9 2020 8:36PM


Two notable meteor showers will be seen in November: Dr Sidharth

Hyderabad, Nov 9 (UNI) GP Birla Observatory and Astronomical Research Centre Director Dr Sidharth said Over the next few days when the sky is clear and if you gaze at it for some time, it is very likely that you could get lucky and catch a glimpse of an exceptionally brilliant meteor or known commonly as a Taurid meteor.

In a release here on Monday, Dr Sidharth said, the Taurids are known to have the longest duration of general visibility, as compared to other meteors. Meteors from the Taurid stream began to be sighted in the night sky starting around October 21. They will be seen till about November 27. The best time to catch a glimpse of these gorgeous meteors is the week between November 5 and November 12.

A bright moon, which turned full (blue moon) has obscured the proper sighting of these meteors this year. The moon has since been waning. It will now be seen as a wafer-thin crescent.

The intervening night of November 11-November 12 is considered the best night to watch the Taurid meteor shower. The moon, a wafer-thin crescent at this time, will rise around 0315 hrs, and this will give ample time (about 9 hours) of clear skies to sight the Taurids.

Roughly about 10 to 15 meteors could appear per hour each evening moving at a slow pace and seen in a yellowish-orange hue. Since they appear to radiate from the constellation of Taurus (the Bull), they are called Taurids and constitute the debris left behind by Encke's Comet, or probably a larger comet which left Encke and a lot of other debris.

The Taurid debris stream, according to astrophysicists, consists of larger fragments than those usually shed by other comets. Hence, the appearance of exceptionally bright meteors known as "fireballs." Encke's Comet has the shortest known orbital period for a comet, taking only 3.3 years to make one complete trip around the sun.

In 1991, Dr Victor Clube, an English astrophysicist and expert on comets and cosmology, wrote in a paper (The Structure and Evolution of the Taurid Complex) which he co-authored along with DI Steel and D.J Asher, that the Taurid meteor stream contains perhaps a half a dozen full-size asteroids whose orbits place them squarely in the stream. Clube and his colleagues posit the argument that the Taurids' range of orbits indicates they were all shed by a huge comet, originally 100 miles (160 km) across or more, that entered the inner solar system some 20,000 years ago. By 10,000 years ago it was desiccated and brittle; Encke's Comet might actually be the biggest leftover chunk.

It will be recalled that a bit of Encke’s Comet crashed into Siberia in a huge fireball in 1908 leaving a trail of destruction, the release added.
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