C/2009 P1 (Garradd)



Comet C/2009 P1 (Garradd) with a 40cm F/4 Newtonian and QSI583wsg CCD

For this image I used my new modified Canon 5D MkII on the 40cm f/4 Newtonian.
The fov of this full frame (24 x 36mm sensor is much bigger than with the QSI583 ( now 77 x 52 arc minutes, was 39 x 29 arc minutes) but still too small for this comet!
42 exposures of 60 seconds between February 2, 2012, 4:55 and 5:40 UT, @ 1000 ISO. For comets a one shot colour camera is a big advantage!
Processing in ImagesPlus, PixInsight and Photoshop CS4. The originals images measure 5632 x 3752 pixels and a TIF-file is 123MB...


Comet C/2009 P1 (Garradd) with a 40cm F/4 Newtonian and QSI583wsg CCD

12 x 3 minutes 40cm f/4 newton, QSI583wsg in binning 2x2.
Image from January 31, 20012 between 04:41:19 and 05:19:49 UT. The sky was not as transparent as I had hoped. Notice how the ion tail is much thinner compared to the previous time.


Comet C/2009 P1 (Garradd) with a 40cm F/4 Newtonian and QSI583wsg CCD

2009P1 Garradd on January 24, 2012. With the 40cm F/4 and QSI583 CCD
6 x 5 minutes exposure between 04:15:48 and 04:46:56 UT on January 24, 2012. 40cm f/4 newton, QSI583wsg in binning 2x2. I read a sky brightness of 20,6 on the SQM.


Comet C/2009 P1 (Garradd) with a 40cm F/4 Newtonian and QSI583wsg CCD

2009P1 Garradd on November 16, 2011. With the 40cm F/4 and QSI583 CCD
Last image of this comet in the evening sky, it has sunk into the trees now from my location!


Comet C/2009 P1 (Garradd) with a 40cm F/4 Newtonian and QSI583wsg CCD

2009P1 Garradd near NGC6408 (mv 13.7) on October 31, 2011. With the 40cm F/4 and QSI583 CCD, 6 x 3 minutes each for R, G and B between 17:34:14 and 18:32:10 UT
SQM reading was mag 19.45 /square arcsecond due to nearby Sportfield illumination and a watery sky. All RGB data was added and used as the Luminance.
I'm quiet pleased with the result considering the circumstances!


Comet C/2009 P1 (Garradd) with a 40cm F/4 Newtonian and QSI583wsg CCD

2011-10-23 17:44:58 UT - 18:47:28 UT 40cm F/4 with QSI583wsg @ -20C 4 x 300s each for RGB, combined with adaptive add and colourprocessed in PixInsight.


Comet C/2009 P1 (Garradd) with a 40cm F/4 Newtonian and QSI583wsg CCD

2011-10-23 17:44:58 UT - 18:47:28 UT 40cm F/4 with QSI583wsg @ -20C 4 x 300s each for RGB, all calibrated images added with adaptive add.


Comet C/2009 P1 (Garradd) with a 40cm F/4 Newtonian and QSI583wsg CCD

October 16, 2011


Comet C/2009 P1 (Garradd) with a 40cm F/4 Newtonian and QSI583wsg CCD

October 16, 2011


Comet C/2009 P1 (Garradd) with a 40cm F/4 Newtonian and QSI583wsg CCD

3 RGB exposures of 5 minutes each between 19:27:37 en 19:43:04 UT on September 30, 2011


Comet C/2009 P1 (Garradd) with a 40cm F/4 Newtonian and QSI583wsg CCD

6 RGB exposures of 3 minutes each between 20:33:49 and 20:54:51 UT on September 18, 2011
A little less moonlight today, a few galaxies are visible below the comet.

Comet C/2009 P1 (Garradd) with a 40cm F/4 Newtonian and QSI583wsg CCD

10 Luminance exposures of 2 minutes each between 20:01:00 and 20:11:00 UT on September 15, 2011, Despite the Full Moon there is some tail visible.


Comet C/2009 P1 (Garradd) with a 40cm F/4 Newtonian and QSI583wsg CCD

3 RGB exposures of 2 minutes each between 20:57:45 and 21:04:57 UT on August 27, 2011


Comet C/2009 P1 (Garradd) with a 40cm F/4 Newtonian and QSI583wsg CCD

3 Luminance exposures of 2 minutes each between 20:50:58 and 20:57:23 UT on August 27, 2011