Comet 252P/LINEAR last night from Kyiv (Osokorky). While sky was clear, substantial atmospheric haze dims stars. Comet is quite visually bright while its predicted magnitude is low (expected ~14m only; last visual observations give brightness ~6m [cometbase.net]). Fuzzy orange "star" to the upper-left of the comet is globular cluster M14.
The comet is periodic (orbital period 5.33 years). This is near-Earth object, it passes quite close both Earth and Jupiter (Earth-Jupiter family comet). In the past, it probably was Jupiters Troyan.
Time: 2016-04-05 (4:24-4:36 UT+3).
Angular size of the image is 4x4 degree (by nova.astrometry.net).
Canon EOS 600D + EF 50mm f/1.8 II on tripod.
150 frames by 3.2s; f/2.5; ISO=3200
The image was made in two steps: initial 150 frames (3.2s) where groupped by 10 and stacked in DSS, then resulted 15 frames where stacked again with alignment by the comet.
To be honest, result with alignment by the comet differs a little from result made using alignment by stars.
Resulted image was treated with FITStacher (background subtraction and gamma-correction) and then postprocessed in RawTherapee.
The comet is periodic (orbital period 5.33 years). This is near-Earth object, it passes quite close both Earth and Jupiter (Earth-Jupiter family comet). In the past, it probably was Jupiters Troyan.
Time: 2016-04-05 (4:24-4:36 UT+3).
Angular size of the image is 4x4 degree (by nova.astrometry.net).
Canon EOS 600D + EF 50mm f/1.8 II on tripod.
150 frames by 3.2s; f/2.5; ISO=3200
The image was made in two steps: initial 150 frames (3.2s) where groupped by 10 and stacked in DSS, then resulted 15 frames where stacked again with alignment by the comet.
To be honest, result with alignment by the comet differs a little from result made using alignment by stars.
Resulted image was treated with FITStacher (background subtraction and gamma-correction) and then postprocessed in RawTherapee.
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