Tag Archive | Lyrid

Meteor Shower From 1P/Halley Comet, Eta Aquariids, Will Peak Over New Hampshire Sunday Morning, May 5, 2013.

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by Anura Guruge


>> Lyrid meteor shower … — Apr. 20, 2013.
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The Eta Aquariids meteor shower, like all such showers, is an annual event; this one taking place between late-April and early-May.

As with all meteor showers, the meteors associated with shower are detritus left in the wake of comets; periodic comets such as Halley’s that make routine visits obviously leaving behind more matter in their trail each time they make a pass. The Eta Aquariids meteor shower is caused by the Earth crossing through the debris field left behind by 1P/Halley, with its 75.3 year orbital period, over the centuries.

Actually there is another meteor shower associated with 1P/Halley — that being the typically prolific, Orionids in late October. Having two showers associated with a ‘frequent’ visitor like Halley is to be expected. If nothing else, as should be fairly clear with all the attention that Comet ISON is getting, comet’s that are heading past Earth to circumnavigate the Sun have an inbound and outbound path, that crossed the Earth’s orbital path. So there are are two debris trails — and in the case of ISON, if it survives perihelion, Earth will be crossing those two paths, two weeks apart in January 2014. In the case of Halley, due to regular perturbations by Jupiter, its orbital path also changes, albeit not majorly, from trip to trip. So it, over the centuries, has laid down ‘rubber’ in different parts of the sky. Contrary to what you might read in the media, this meteor shower is not the result of Halley’s last apparition in 1986. It is debris left behind over the centuries.

Meteor showers, confusingly, are named after the constellation from which they appear to originate — though the constellation has nothing to do with the shower. It just provides astronomers with a reference as to where to find the shower. The constellation in this instance is Aquarius. Eta Aquariids the nearest distinguishing star, one of the brightest in the constellation.

I doubt whether I will get up that early to see this shower. I have seen quite a few in my time.


Comet Halley’s 75.3 year orbital path relative to the planets. From http://csep10.phys.utk.edu/


Halley on March 14, 1986, taken ‘close-up’ by European spacecraft ‘Giotto’ that was sent up as part of the ‘Halley Armada’ to meet-and-greet it. From NASA.

Lyrid Meteor Shower Peak Over New Hampshire This Weekend

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by Anura Guruge


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The Lyrid Meteor shower is an annual event taking place, typically, between April 16 and April 26.

It is caused by the Earth crossing through the debris field left behind by Comet C/1861 G1 (Thatcher) over centuries.

C/1861 G1 (Thatcher), with an aphelion of 110 AU, a perihelion of 0.9207 AU and an orbital period of 415 years, was discovered on April 5, 1861 by A. E. Thatcher (not sure whether he is a relative). Its last perihelion was in June 1861, when it passed by the Earth at a 31 million mile separation. So, it came closer to Earth then than will the much anticipated Comet ISON, C/2012 S1. It will next go by Earth in 2,276.

The Lyrid Meteor shower has been observed for over 2,600 years!

Meteor showers, confusingly, are named after the constellation from which they appear to originate — though the constellation has nothing to do with the shower. It just provides astronomers with a reference as to where to find the shower. The constellation is Lyria. Vega the nearest distinguishing star.

The above map shows where you can locate the shower, early in the morning, on Monday, April 22, 2013.

They are expecting 10 – 20 meteors/hour, possibly with peaks of 100 meteors/hour.

I have seen some great meteor showers in NH. Maybe this might be a good one. Enjoy.

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