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<div dir="ltr" align="left"><font color="#0000ff" size="2" face="Arial">Geocentric Phases of the 2012 Transit of Venus
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<div dir="ltr" align="left"><font color="#0000ff" size="2" face="Arial"> Event Universal Position
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Time Angle</font></div>
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<div dir="ltr" align="left"><font color="#0000ff" size="2" face="Arial"> Contact I 22:09:38 41°<br>
Contact II 22:27:34 38°<br>
Greatest 01:29:36 345°<br>
Contact III 04:31:39 293°<br>
Contact IV 04:49:35 290°</font></div>
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<div dir="ltr" align="left"><span class="239401116-05062012"><font color="#0000ff" size="2" face="Arial">Which means for the US West Coast start looking at 15:00 PDT not 14:13...</font></span></div>
<div dir="ltr" align="left"><span class="239401116-05062012"><font color="#0000ff" size="2" face="Arial">Lee K6LW</font></span></div>
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<font size="2" face="Tahoma"><b>From:</b> aprssig-bounces@tapr.org [mailto:aprssig-bounces@tapr.org]
<b>On Behalf Of </b>Greg Dolkas<br>
<b>Sent:</b> Tuesday, June 05, 2012 8:20 AM<br>
<b>To:</b> TAPR APRS Mailing List<br>
<b>Subject:</b> Re: [aprssig] [amsat-bb] Transit of Venus event 5/6 June<br>
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<div class="gmail_quote">On Tue, Jun 5, 2012 at 2:11 AM, Bob Bruninga <span dir="ltr">
<<a href="mailto:bruninga@usna.edu" target="_blank">bruninga@usna.edu</a>></span> wrote:<br>
<blockquote style="BORDER-LEFT: #ccc 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex" class="gmail_quote">
Re Transit of Venus:<br>
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> Do I have my math right? Your website says that<br>
> the transit starts around 05:13z, which is around<br>
> 10:13pm local time out here on the West Coast (UTC<br>
> -7). How can that be, if according to the map, the<br>
> transit will still be in progress 5hrs later at<br>
> Sunset?<br>
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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.<br>
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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.<br>
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GOod luck!<br>
Bob, WB4APR<br>
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It's at the end of the paragraph "Observing the Parallax" (colored emphasis is mine), right below the picture of the Camera Obscura:<br>
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<font color="#000000"><font size="3"><b>Observing the Parallax:</b> The Transit of Venus is a fascinating event historically as it gave early astronomers the first mechanism with which to actually measure the distance from the Earth to the Sun and confirm their
underestanding of the size of Venus. During the 6 hour or so event, there are 4 critical times as shown below. These instances will occur at slightly different times for observers at different Earth locations because of parallax. But generally begin at
<span style="COLOR: rgb(51,51,255)">0513z and end at 1126z. </span></font></font><br>
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Anyway, 5:13pm EDT (2:13pm PDT) works out a whole lot better. Thanks!<br>
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Greg KO6TH<br>
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