Home > Uncategorized > A Quick Look at Comet Lovejoy C/2014 Q2

A Quick Look at Comet Lovejoy C/2014 Q2

It’s not often that we get a bright comet so high in the sky.  Luckily, I was able to seize a couple of hours of clear skies to image Comet Lovejoy while it was in Aries.  I took separate L, R, G, and B exposures across a 1×4 mosaic, since I knew the tail could be really long.  This extended tail was also very dim, barely showing with 3-minute exposures.  Because comets are moving targets, I only took a single 3-minute exposure for each channel, then moved the field of view.  You can actually see the effect of this movement a little in the head of the comet, where the L exposure came about 20 minutes after the R.

Comet Lovejoy, Jan 20, 2015

Comet Lovejoy, Jan 20, 2015

It’s easy to lose your sense of scale here.  This is a tremendous field of view.  Below is one of the uncropped mosaic images used to generate the above. Each of the four overlapping frames you see is 2.9 x 2.2 degrees, so the total field of view is around 7 x 3 degrees!

Uncropped mosaic view

Uncropped mosaic view

Image data:

  • Exposures: 1 x 3 min L, R, G, and B exposures in a four-part mosaic
  • Telescopes: William Optics Star 71 (360mm f/5)
  • Cameras: SBIG ST-8300M, 2×2 binned
  • Mount: CGEM
  • Guiding: QHY 5L-II mono, guided using PHD2
  • Conditions:  calm
  • Processing: DeepSkyStacker -> PixInsight -> Photoshop
  • Date: Jan 20, 2015
Advertisements
  1. No comments yet.
  1. No trackbacks yet.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: