Partial moon eclipse August 16, 2008

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Partial moon eclipse on August 16, 2008
This partial moon eclipse in the evening on August 16, 2008 caused a moon disk coverage of 80% by the earth Umbra. The beginning of this moon eclipse should not be visble well in Austria because the moon would be very low about the southeast horizon at this time. But the other part of this eclipse should be visible well on southeast and southern sky.

Diagram and data of partial moon eclipse on August 16, 2008
Diagram and data of partial moon eclipse on August 16, 2008

      Event                Date             Time     Altitude   Azimut
R  Moonrise           August 16, 2008     17:56 UT       0       110
1  Penumbra entry     August 16, 2008     18:23 UT      02       115
2  Umbra entry        August 16, 2008     19:35 UT      12       129
4  Eclipse maximum    August 16, 2008     21:11 UT      23       150
6  Umbra exit         August 16, 2008     22:44 UT      28       174
7  Penumbra exit      August 16, 2008     23:57 UT      27       194
S  Moonset            August 17, 2008     04:26 UT       0       253

The observation in Nonndorf - Austria (48.79 North, 15.24 East)
Sadly due to total cloud coverage during the first half of this eclipse mostly no moon was visible on the sky. Sometimes only for few seconds the moon was visible through cloud holes.

In this phase the first webcam images of the live webcast were transmitted from the webcam mounted only on a fixed tripod. Because of the risk of raining a setup of the the mount EQ6 with the Newton telescope for webcam guiding could not be accomplished in the first 60 minutes. But some images could be taken with the Canon 20D and 300mm telephoto lens.

After I could see on current weather sat images that the sky would get partly clear in the next 30 minutes and the situation will get better I started with setup of my mobile station.

From about 20:55 UT the weather situation got better as ecpected. From now on a permanent observation of this monn eclipse was possible. About 280 images with an interval of 30 seconds could be exposured on the 1200/254mm Newton in primary focus with the DSLR Canon EOS 20D. The webcam ToUcam Pro (PCVC740K) was mounted again on my modificated finder scope 165/50mm. The finder scope was guided with my Newton on a EQ6 controlled by EQMOD and Guide 8. An Astronomik IR block filter on the webcam provided an accurate point of focus on the modificated finder refractor with F3.3. In this night 380 images in an interval of 30 seconds were transmitted in a live webcast from the webcam. On about 280 of them the moon was visible.

For the visual observation the Fujinon 16 x 70 FMT - SX mounted on tripod Manfrotto 075 with tilt gear head Manfrotto 410 was used. As always in eclipse events the view through this powerful binocular was fantastic.

On August 16, 2008 the moon passed through the northern umbral shadow
The moon passed through the northern umbral shadow
This image sequence clearly shows the umbra size and position as well as the moon movement
August 16, 2008 at 19:35 UT
Moon at 19:35 UT
August 16, 2008 at 20:56 UT
Moon at 20:56 UT
August 16, 2008 at 21:05 UT
Moon at 21:05 UT
August 16, 2008 at 21:20 UT
Moon at 21:20 UT
August 16, 2008 at 21:35 UT
Moon at 21:35 UT
August 16, 2008 at 21:50 UT
Moon at 21:50 UT
August 16, 2008 at 22:05 UT
Moon at 22:55 UT
August 16, 2008 at 22:20 UT
Moon at 22:20 UT
August 16, 2008 at 22:35 UT
Moon at 22:35 UT
August 16, 2008 at 22:50 UT
Moon at 22:50 UT
The webcam image sequence as a simple video
Partial moon eclipse from Nonndorf (2008-08-16)
640 x 480 MPEG4 - 1.25MB

© 2008 G. Dangl
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August 20, 2008
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