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A friend had sent me these images. The object wasn't moving, and claims it produced bright flashes. The images were taken with a phone (unfortunately) on the 5th and 6th of January. Perhaps some of you might have a logical answer. He says he doesn't believe it's a UFO (otherwise I probably wouldn't be friends with him anymore), so I doubt it's fabricated.
edit: I should also note that this was taken in Serbia, Kovin, around 1AM.
A spectrum of Comet 46P (Wirtanen) with the ALPY600.
The raw spectrum image before sky background subtraction. Note as well as the comet spectrum, the bright Na D line from local light pollution and other auroral lines from natural airglow
The coma extended beyond the length of the slit so a separate sky spectrum was recorded and subtracted
The Spectrum of the bright central region is dominated by the scattered light from the sun while the spectrum of the extended coma is mainly emission from excited molecules such as CN (The very bright line in the UV), C3, C2 (The Swan bands which give the coma its blue green colour) and NH2
By removing the emission component from the spectrum of the central region and dividing it by the spectrum of a sunlike star recorded the same evening, the reflectance spectrum of the dust can be extracted
My submission for 46P Wirtanen
Single exposure, 1 minute iso 1250
Nikon 800E full frame - edge cropped
Altair Astro 115 EDT-APO refractor on iOptron iEQ45 Pro mount.
Capture: SG Pro, guiding PHD 2 via SX Lodestar
Processing: PixInsight 1.8 and Photoshop CS3 Extended (for caption and resizing)
I'm still dizzy after processing this one for each LRGB filter.
Comet 21P meets open cluster M37 in the night/morning of 10/11 September, at perihelion.
This is a combination of 60s x 30 x 4 subs, taken through the SW130PDS with an ASI1600MMC.
No deconvolution applied, only noise reduction. About the remaining noise?! ... yes, please. Unfortunately the light pollution at home didn't let me record more.
Thanks for watching and clear skies!