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Update Perseid shower



 
 
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  #1  
Old August 6th 10, 02:05 PM posted to uk.sci.astronomy
CJ
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Posts: 21
Default Update Perseid shower

Hi all,
Thanks to all who have contributed to my thread, I wanted to know also
about radio observations and got that without having to ask. The last 2
nights I have looked for 1 hour from 11 pm BST to midnight BST but have had
no luck at all. My night sky at this time only gives a faint hint of the
Milky way so I struggle to see below 4.5 magnitude. However I counted at
least 10 artificial satellites each night. I shall have to get out the
lounger for a better vertical view! . It is also essential to wrap up warm
with several layers of clothes.

I intend to try to photograph at least one trail with my wide eye lens when
the shower is at its maximum, the hints and tips on the photography site
will assist greatly. I just thought it was point and hope and forgot that
dewing up is not only a problem for telescopes!




  #2  
Old August 6th 10, 05:17 PM posted to uk.sci.astronomy
David Entwistle[_4_]
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Posts: 12
Default Update Perseid shower

In message mLT6o.57820$zT3.48951@hurricane, CJ
writes
Hi all,
Thanks to all who have contributed to my thread, I wanted to know also
about radio observations and got that without having to ask. The last 2
nights I have looked for 1 hour from 11 pm BST to midnight BST but have
had no luck at all. My night sky at this time only gives a faint hint
of the Milky way so I struggle to see below 4.5 magnitude. However I
counted at least 10 artificial satellites each night. I shall have to
get out the lounger for a better vertical view! . It is also essential
to wrap up warm with several layers of clothes.

I intend to try to photograph at least one trail with my wide eye lens
when the shower is at its maximum, the hints and tips on the
photography site will assist greatly. I just thought it was point and
hope and forgot that dewing up is not only a problem for telescopes!




Hi CJ,

It's worth remembering too that although the Perseid radiant is
circumpolar from mid-northern latitudes, it climbs steadily throughout
the night. The radiant is lowest in the early evening at around 20 - 30
degrees above the northern horizon. It then climbs steadily and will be
almost overhead around dawn.

From a meteoroid's point of view, this means that it approaches your
patch of visible sky edge-on in the evening, whereas it approaches
straight-on in the pre-dawn hour. So, your sky presents a increasing
sized target, for the stream, throughout the night and this in turn
means, all other things being equal, you'll see more Perseids in one
hour of observing after midnight, than you'd see in one hour of
observing before midnight.

You'll also see more sporadic meteors after midnight too, as you are
carried round onto the side of Earth facing into the direction of the
Earth's travel around the Sun. That's also why, away from the major
showers, the radio-meteors observers see a steadily varying diurnal
cycle of meteor activity - highest at local time 06:00 (on the "front"
of the earth) and minimum at local time 18:00 (on the "back" of the
Earth).

http://www.rmob.org/livedata/main.php

Good luck,
--
David Entwistle
 




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