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28 oktober 2012 04:54:22 UT: earthgrazer

EN-98 FireballsPosted by Koen Miskotte Mon, October 29, 2012 11:26:03

In the early morning of October 28, 2012 at 04:54:22 UT my all sky camera captured a so called earth grazer. Earthgrazers are meteors moving nearly parallel to the Earth's atmosphere and because of that they are long visible. On the picture taken by the Ermelose all sky camera the sector interruptions are disappeared because of the slow apparent velocity of this meteor.
Video recordings of Klaas Jobse from Oostkapelle shows a visibility of minimal 8 seconds. The meteor was not bright, about magnitude -2 or -3 and is therefore barely visible on the recording from Ermelo. During a first routine check this meteor was therefore not found on the recordings. Only after the notification of Klaas it could be found on the right shot. Here are some pictures, they are significantly modified for making the faint trail visisble.

Figure 1: all sky picture with the faint trail of an earthgrazer. It is visible in Taurus and Orion. Click on the image for a larger version.

Figure 2: crop of previous image. Click on the image for a larger version.

Camera: Canon EOS 450D
Lens: Sigma 4.5 mm F2.8 EX DC Circulair fish eye
Timer Controller: HAMA DCCS timer controller
Exposure time: 119s
Interval: 1 s
ISO: 400
F: 3,2
Date: 28-10-2012
Period UT: 04:53:30 - 04:55:29 UT
Time meteor UT: 04:54:22 UT (timing provided by Klaas Jobse)
Classification: SPO
Constellation: TAU, ORI
Brightness: -3
Simultaneously with stations: Oostkapelle
Remarks: very slow moving earthgrazer

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