Venus Transit 2004

For the first time since December 6,1882, Venus will glide across (transit) the face of the Sun on June 8, 2004. I observe this one-lifetime event with my friend at my observatory. Next transit of Venus will be on 5-6 June 2012 but will be no visible from my location. Here are images from this event. Link for VIDEO

This image shown complete transit. Venus was enter from left side (east) at 5:20 UT and exit from the Sun disc at 11:23 UT. Image is obtained through a Celestron refractor 102mm/f5 and Vivatar 2x teleconverter (Fl 1000mm) on Canon EOS 300D (Mylar filter, 1/60 sec., 400ASA ).

Second contact - when outer limb of Venus touches limb of Sun disc (05:39:00 UT).


Venus travel beneath Sun disc ( 07:48:12 UT)

Third contact - Venus slightly goes off the Sun disc (11:03:48 UT).

All images are obtained through a Celestron refractor 102mm/f5 and Vivatar 2x teleconverter (Fl 1000mm) on Canon EOS 300D ( Mylar filter, 1/60 sec., 400ASA ).

 

The transit begins with "first contact" when the limb of Venus touches limb of the Sun. Venus take nearly 20 minutes to slide completely across the Sun edge and ends with "second contact".

Images shown this entrance of Venus onto the Suns bright disc.

In earlier times, astronomers used transits of Mercury and Venus to get information about the dimensions of the solar system. By timing the exact moments that the planet entered and left the Sun's disk, from different places on Earth, it was possible, using parallax, to determine the distance of the Earth from the Sun. Once the distance from the Earth to the Sun was known (called Astronomical Unit), the comparative distances of other bodies in the solar system and nearby stars could be calculated.

Outgoing of Venus out of Suns disc: third and fourth contact.

Images are obtained through a Celestron C9,25 at f6,3 on Philips Webcam Pro 3D.

 

Black Drop Effect - appear near second and third contact . Dark Venus and the dark sky off the Suns edge seem to reach out to meet each other, forming a dark column linking them and turning Venus into teardrop shape. It is a phenomena that has frustrated astronomers and explorers since 1761. Because the edge of Venus smears against the edge of the sun at this moment, observers have a tough time estimating the exact second when contact is actually made. "Black drop" effect is caused by refraction through the very dense atmosphere of Venus, although it has also been attributed to optical effects and has been reported during transits of Mercury. Astronomers rightly concluded that Venus had an atmosphere.
Images shown Venus at second contact (5:40 UT).

Image is obtained through a Celestron C9,25 at f6,3 on Philips Webcam Pro 3D. Second image is processed in Photoshop to  emphasis "black drop".

 


(C) Copyright 1996 - 2020 by Andjelko Glivar. All rights reserved. This material may not be published in any form without permission.


 


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