Perseid watch 7/8 Aug

In article , Damian Burrin
writes
Spent a couple of hours watching and imaging for Perseids last night from

When is the maximum 11th August?

Hi Damian,

The short answer is that Perseid activity is predicted to remain high
for several days either side of the peak, so activity should be worth
watching for, a couple of days before and after the peak.

The longer answers is that the Earth is predicted to passes through the
greatest density of dust left by comet 109P/1862 01 (Swift-Tuttle)
between 140.0 and 140.1 degrees solar-longitude. That corresponds to
17h00m - 19h30m UT on August 12 and this is when the greatest number of
Perseid meteoroids are predicted to enter the Earth's atmosphere. This
time is in daylight for a UK observer.

Apart from being daylight, 17h00m - 19h30m UT also corresponds with the
Perseid radiant being low in a UK observer's sky. Meteor rates increase
as the shower's radiant rises higher above the horizon because the
observer's sky presents a greater 'target' to the meteoroids when their
relative motion is face-on, rather than edge-on to that volume of
atmosphere.

The other factor is interference from the Moon, which will be setting
during the evening.

See Alastair McBeath's Society of Popular Astronomy article for
additional information.

http://www.popastro.com/sections/met...r-activity.htm

--
David Entwistle