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Friday, 19 June 2015

Grimaldi crater HD video through the telescope.

This video was also used for simple video captures. Photo images are here.
Craters that are visible here: Grimaldi (430 km), Hevelius (106 km), Lohrmann (31 km), Damoiseau (37 km) and Hermann (16 km).

(430 km) is rather a basin flooded by lava, not a crater, and has a round not oval shape as seen from Earth because it is located on the edge of the Moon. Its margins has not ordinary walls like other craters, but is so destroyed that was transformed into hills and irregular peaks.

(106 km) has a low affected rim, and has a shallow depth of 1.8 km, in contrast with its size.
At the northern edge is a small but prominent crater, Cavalerius. At the south of Hevelius is Lohrmann crater (31 km) and to the south is Grimaldi (430 km). Because of their positions on the Moon, craters are oval when viewed from Earth.

The video was made with the camera mounted on the telescope, to be more exact on the telescope eyepiece. To protect the telescope from vibrations, I used a tracking motor from Lacerta, and thus the image was more stable.

However, even with this tracking device for celestial bodies, there were vibrations of the telescope tube, causing the image to be slightly unstable. For this, I used the video stabilization option in Sony Vegas editing software, so the video was 100% correct on this issue.

Unstable aspect of the image through the telescope is caused by a combination of turbulence in the Earth's atmosphere and increased streams of heat from the ground and buildings.

Images were obtained by attaching a camera directly into the eyepiece of an astronomical telescope of 8 inch Newtonian; For this reason the eyepiece visual field was increased.

In the pictures below are labeled craters and other lunar features in the region. To better understand this photo, you should note that the label with the name or the letter of larger craters could be found at their center, and on the small craters, you should find them around them, usually above.

Magnitude: -12.03
Phase: 70.5% (0% = new, 100% = full)
Distance: 398.311 km
Sidereal Period: 27.32 days
Illuminated: 92.2%

Optics: Celestron C8-Newtonian astronomical telescope 
Eyepiece: Plossl 20mm, 2x Barlow
Mount: CG5 (EQ5)
Camera: Sony CX130
Filter: no
Date: 14/03/2014
Location: Baia Mare, Romania
Processing: FastStone Image Viewer


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