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C/2011 L4 (PANSTARRS) with Apo-Elmarit-R 180mmF2.8 May 21 2013UTC | by hirocun
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C/2011 L4 (PANSTARRS) with Apo-Elmarit-R 180mmF2.8 May 21 2013UTC

Our globe will pass the orbit plane of the comet on May 27, 2013, and the dust tail looked sharper and longer recently than before, though the location got far away outside of the orbit radius of Mars.


Here is a frame of the comet with the same optics in April.


The comet passed near the big planetary nebula, Sh2-174 at the night. Integrated flux nebula is relatively dense in the field. Polaris is just outside of the upper edge of the frame.


Here is a frame of IFN, integrated flux nebula around Polaris with the same optics.


and here is a frame of IFN near Messier 31 in Andromeda. IFN is relatively sparse in the field.


You may be able to take general view of IFN distribution in the area on this wide frame.




exuipment: Leica Apo-Elmarit-R 180mmF2.8 and EOS 5Dmk2-sp2, modified by Seo san on Takahashi EM-200 temma 2 jr, equatorial mount without autoguiding


exposure: 3 times 8 minutes at ISO 6,400 and f/4.0

The first exposure started at 17:27:52 and the last frame at 17:44:10 May 21, 2013UTC during the short dark window after moonset and before the beginning of twilight at the night


site: 1,542m above sea level at lat. 35 48 50 North and long. 138 39 16 East in Yamanashi

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Taken on May 21, 2013