Despite being chilled to the bone on more than one occasion, tracking comet Lovejoy over the past month has been a great experience. It was, and still is, a stunning comet. Shooting Lovejoy on a total of 10 occasions over the last month with varying levels of success, I’ve stitched together the best of the bunch to show how the comet has evolved over time…
For the earlier shoots I experimented with different exposure lengths (15-60 seconds), different ISO levels (800-1600), different lenses and different focal lengths (50mm, 85mm and 180mm). This was probably not the best tactic as the best results came from a 12 mile trip to darker skies on the 24th, using the tried and tested settings of 30 second exposures at iso 800 with the 180mm/f.2.8 lens. The image quality is visibly better in this shot mainly because the comet was near zenith so less post-processing was needed to remove the effects of light pollution…
Image details: Nikon D7000, Nikkor 180mm f2.8 at f2.8. 5 minutes (10 x 30 seconds) at iso 800. Using didymium filter. Stacked with Deep Sky Stacker and tracked with barn door tracker.
As Lovejoy recedes further from Earth, its movement through the sky also appears slower. So although it’s starting to fade, it allows for many more exposures before the movement becomes an issue with the stacking. For example this 14 minute exposure from the 6th February vs. the 4 minute exposure on the 13th January.
In the recent images from early February you can clearly see the huge dust tail curving as the comet passes around the Sun.
Image details: Nikon D7000, Nikkor 180mm f2.8 at f2.8. 14 minutes (28 x 30 seconds) at iso 800. Using didymium filter. Stacked with Deep Sky Stacker and tracked with barn door tracker.
I’ll no doubt take more shots of Lovejoy, but as can be seen in the most recent image from the 10th of February, the tail seems significantly dimmer now. Whether this is just another fluctuation in the structure of the tail, or a more significant decline, we’ll have to wait and see.
So I’m left with a series of shots showing comet Lovejoy’s evolution, along with a very full hard drive!.. Let’s hope the next comet Terry Lovejoy discovers is as good as this one.
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Samyang 85mm f1.4 lens..
On a side note, the Samyang 85mm f1.4 lens I bought specifically for the job of imaging the comet proved to be no match for the trusty Nikkor 180mm f2.8. Unlike the results with comet Jacques, the tactic of maximum light gathering didn’t pay off this time. The lens may prove to be better suited to other subjects, but I’m not convinced as the coma was very noticeable even when stopped down. I think the ultra sharp Nikkor 85mm f1.8 G is the way forward at this focal length.
Image details: Nikon D7000, Samyang/Rokinon 85mm f1.4 at f2.8. 4 minutes (16 x 15 seconds) at iso 800. Using didymium filter. Stacked with Deep Sky Stacker and tracked with barn door tracker
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Comet Lovejoy update 17th February…
With the skies finally clear after a week of cloud, I jumped at the chance to capture another shot of Lovejoy as it passed by the Little Dumbbell Nebula (M76). The planetary nebula is so tiny and faint that it’s considered one of the trickiest objects in the Messier catalogue to observe. The comet itself is definitely fading now, with the tail in particular much harder to pick up.
Image details: Nikon D7000, Nikkor 180mm f2.8 at f2.8. 12 minutes (24 x 30 seconds) at iso 800. Using didymium filter. Stacked with Deep Sky Stacker and tracked with barn door tracker.
Ever since hearing about newly discovered comet Lovejoy C/2014 Q2 in the Autumn of last year, I’ve been eagerly anticipating its arrival. Even splashing out on a new lens for the occasion. Unfortunately the weather has scuppered any plans I had to capture the comet in early January, with endless amounts of cloud, usually rolling up just as it gets dark!..
Last night, however, a fleeting break in the clouds allowed me to grab a handful of shots as the comet makes its way past Earth and on towards a close encounter with the Sun on the 30th of January.
I didn’t anticipate much detail with just 8 images to go on (4 minutes total exposure time), but at least the the stacking process was a quick one. The final image above reveals a surprising amount of structural detail in the tail, along with its stunning blue colour. The comet appears much larger than I expected too, the tail now stretches over 10 degrees (20 times the size of the full moon), with much of this huge tail cropped off the bottom of the frame.
With comet Lovejoy quickly moving higher into the northern hemisphere sky, and with the tail changing structure on a daily basis, it should still be a great target for the next couple of months – weather permitting!
Image details: Nikon D7000, Nikkor 180mm f2.8 at f2.8. 4 minutes (8 x 30 seconds) at iso 800. Using didymium filter. Stacked with Deep Sky Stacker and tracked with barn door tracker.