M31 & Comet Pan-STARRS for 6 consecutive days (hims1526)

Image of the day 04/08/2013

M31 & Comet Pan-STARRS for 6 consecutive days

Link: https://www.facebook.com/photo.php?fbid=587182044625274&set=a.468680606475419.114149.441163192560494&type=1&theater

Camera: Canon 500D

Lens: Day 1-2: EF-85mm & DSS 2x drizzle, f/4, iso 800, 60 seconds

Day 3-6: EF-200mm 2.8L, f/3.5, iso 800, 60 seconds

Mount: HL-1

Filter: Astronomik CLS-ccd filter

Software used: DSS, PixInsight, PS

Location: Leicester, UK

Day 2 -6 are all stacked onto day 1's. Thus form this image.

The comet should appear to be dimmer each day, however, this phenomenon does not appear on this image because

1) I have used 85mm and DSS 2x drizzle for the first 2 days, hence a rather low S-N ratio, whereas for day 3-5, I have used 200mm 2.8L therefore a rather hgih S-N ratio.

2) I used f/4 for the first 2 days and f/3.5 for day 3-5, this caused the brightness difference

3) PS technique was not so familiar for the first 2 days

4) Number of frames for day 1-2 were <25 and for day 3-4 >40... this provides the high S-N ratio

M31 is enhanced with a photo taken back in Sept2012 in Yinna Hill, China

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Astrometry.net job	n/a
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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Image of the day 04/08/2013

M31 & Comet Pan-STARRS for 6 consecutive days

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Image of the day 04/08/2013

M31 & Comet Pan-STARRS for 6 consecutive days

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