RASC - St. John's Centre
Members Photos


Image of comet 252P Linear" taken from Mt. Pearl, Newfoundland.
Photographed by Dave Newbury 2016 04 11


"Comet 252P Linear" taken April 11, 2016 at Mount Pearl, Newfoundland. Equipment - Comets often "under perform" - they turn out to be less bright than predicted (sometimes significantly so). However 252P was different for this year's visit - as evident in the Magnitude Graph (grey line is prediction). Notice the jump in magnitude around beginning of March 2016. In fact it reached naked eye brightness. 252P is a short-period comet (approximately 5 years) and is in the relatively rare Earth-Jupiter family of comets. It is believed that Panstarrs BA14 is a smaller break-off of 252P and follows closely behind it. During this visit these comets passed within 14 and 9 lunar distances respectively - one of the closest comet encounters in a couple hundred years. More information on these and other comets (including Magnitude charts) here: http://www.aerith.net/comet/weekly/current.html

Equipment - C11 on EQ8, Canon 6D (modified) and LPS-P2 filter. Autoguided using Stellarvue 90 APO, QHY5LII-mono and PHD2. Images captured with assistance of BackYardEOS, stacked and processed in PixInsight. Stack of 12, 90-second subs @ 3200iso (18 minutes total integration time).

Click on image for full original photo.

"Comet 252P Linear" brightness chart.



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