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On 6/5/2012 5:11 AM, Bob Bruninga wrote:
<blockquote cite="mid:201206050911.020978@mp6.usna.edu" type="cite">
<pre wrap="">Re Transit of Venus:
</pre>
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<pre wrap="">Do I have my math right? Your website says that
the transit starts around 05:13z, which is around
10:13pm local time out here on the West Coast (UTC
-7). How can that be, if according to the map, the
transit will still be in progress 5hrs later at
Sunset?
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I did a quick look at my site, and do not see the reference to 0513z. Please let me know where the mistake is.
I am in japan and cannot fix it anyway. But I do know that it begins at about 6 PM EDT on the 5th of June on the east coast.
GOod luck!
Bob, WB4APR</pre>
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<big>Weatherman here in Vermont just confermed that it starts<br>
at around 6:13 pm EDT which translates to 5:13 pm EST.... Is that<br>
posibaly where the 5:13 came from ???<br>
Anyway using that time the visibility chart fits....<br>
Tad N1QAG<br>
<br>
</big>
<blockquote cite="mid:201206050911.020978@mp6.usna.edu" type="cite">
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</pre>
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<pre wrap="">
What am I doing wrong?
Greg KO6TH
On Mon, Jun 4, 2012 at 4:10 PM, Bob Bruninga
<a class="moz-txt-link-rfc2396E" href="mailto:bruninga@usna.edu"><bruninga@usna.edu></a> wrote:
Transit of Venus Special Event, 5/6 June 2012:
For the 7th time in Human history and last time
this century, Venus will pass in front of the sun
on 6 June 2012. We are encouraging hams to join
up with astronomers and observers in public places
to share in this event. It is observable
worldwide except the center of the Atlantic
(eastern S.America and western Africa)
Everywhere else can see parts of it. It lasts
5+ hours and is fully visible around the Pacific
Rim. In the Usa it is late afternoon on the 5th
towards sunset.
All previous centuries were before the discovery
of radio and so sailing ships were dispatched
around the globe to time the event. From these
times, the size of the Solar System could be
calculated. It took months if not years to get
the data back. Now we can do it in 0.05 seconds
with Ham radio.
See if you can contact hams at other Transit of
Venus sites from your public observing site.
Here are the suggested calling frequencies. We
don't want contest-style pileups nor home
stations. We just want a place where similar
public setups can contact like minded other public
viewing sites via ham radio and make their
reports.
See the web page:
<a class="moz-txt-link-freetext" href="http://aprs.org/VenusTransit2012.html">http://aprs.org/VenusTransit2012.html</a>
We are suggesting these calling frequencies:
40 Meters - 7180 KHz
20 Meters - 14240 KHz
17 Meters - 18140 KHz
15 Meters - 21240 KHz
12 Meters - 24940 KHz
10 Meters - 28340 KHz
VHF - Join the global APRS message reflector "CQ
VENUS" to exchange live APRS messages with all
other participants. To do this, send APRS msg to
CQSRVR with the first words of your message CQ
VENUS ... and your text. You can send up to one
messae each 30 minutes. For details, see the web
page.
*** TAKE ALL IMPORTANT SAFETY PRECAUTIONS WHEN
VIEWING THE SUN!!! *** Google for Techniques.
Bob Bruninga, WB4APR (will be observing in Japan
with a Japanese callsign JH1IBN-7 from Kyoto.
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<pre wrap="">
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