Comet Observations by Carl Hergenrother

Observations of Comet 73P-G/Schwassman-Wachmann 3

All observations by Carl Hergenrother, Lunar and Planetary Lab (LPL), University of Arizona & Smithsonian Astrophysical Observatory (SAO)

73P-G - 2006 Apr. 12.32, 13.32, 15.40, 16.31, 17.48, 18.31, 19.49, 20.31, 21.29, 27.33, 30.34, May 1.3, 4.48 UT

73P-G

73P-G on 2006 Apr. 12.32 UT
SAO 1.2-meter at Mount Hopkins (MPC code 696) with Sloan i filter
50 x 20-second averaged image (brightest pixel rejected to eliminate cosmic rays) 
1.5" seeing through variable cirrus
log display
7.5' by 6' FOV (plate scale 0.67" / pixel)

Contour plot of central 20" x 20"

73P-G on 2006 Apr. 13.32 UT
SAO 1.2-meter at Mount Hopkins (MPC code 696) with Sloan i filter
50 x 20-second averaged image (brightest pixel rejected to eliminate cosmic rays) 
1.6" seeing through variable cirrus
log display
7.5' by 6' FOV (plate scale 0.67" / pixel)

Contour plot of central 20" x 20"

73P-G on 2006 Apr. 15.40 UT
SAO 1.2-meter at Mount Hopkins (MPC code 696) with Sloan i filter
30 x 30-second averaged image (brightest pixel rejected to eliminate cosmic rays) 
2.0-2.5" seeing through light cirrus and bright moonlight
log display
7.5' by 6' FOV (plate scale 0.67" / pixel)

Contour plot of central 20" x 20"

73P-G on 2006 Apr. 16.31 UT
SAO 1.2-meter at Mount Hopkins (MPC code 696) with Sloan i filter
20 x 20-second averaged image (brightest pixel rejected to eliminate cosmic rays) 
1.3" seeing, photometric, bright moonlight
log display
7.5' by 6' FOV (plate scale 0.67" / pixel)

Contour plot of central 20" x 20"

73P-G on 2006 Apr. 17.48 UT
SAO 1.2-meter at Mount Hopkins (MPC code 696) with Sloan i filter
6 x 30-second averaged image (brightest pixel rejected to eliminate cosmic rays) 
1.7" seeing, photometric, bright moonlight, twilight
log display
7.5' by 6' FOV (plate scale 0.67" / pixel)

Contour plot of central 20" x 20"

73P-G on 2006 Apr. 18.31 UT
SAO 1.2-meter at Mount Hopkins (MPC code 696) with Sloan i filter
16 x 20-second averaged image (brightest pixel rejected to eliminate cosmic rays) 
1.6" seeing, photometric, bright moonlight
log display
7.5' by 6' FOV (plate scale 0.67" / pixel)

Contour plot of central 20" x 20"

73P-G on 2006 Apr. 19.49 UT
SAO 1.2-meter at Mount Hopkins (MPC code 696) with Sloan i filter
21 x 15-second averaged image (brightest pixel rejected to eliminate cosmic rays) 
1.6" seeing, photometric, bright moonlight
log display
7.5' by 6' FOV (plate scale 0.67" / pixel)

Contour plot of central 20" x 20"

73P-G on 2006 Apr. 20.31 UT
SAO 1.2-meter at Mount Hopkins (MPC code 696) with Sloan i filter
20 x 15-second averaged image (brightest pixel rejected to eliminate cosmic rays) 
1.5" seeing, photometric
linear display
7.5' by 6' FOV (plate scale 0.67" / pixel)

Contour plot of central 20" x 20"

73P-G on 2006 Apr. 21.29 UT
SAO 1.2-meter at Mount Hopkins (MPC code 696) with Sloan i filter
31 x 15-second averaged image (brightest pixel rejected to eliminate cosmic rays) 
1.6" seeing, photometric
linear display
7.5' by 6' FOV (plate scale 0.67" / pixel)

Contour plot of central 20" x 20"

3P-G on 2006 Apr. 27.33 UT
Vatican 1.8-meter at Mount Graham (MPC code 290) with R filter
25 x 60-second median averaged image (brightest 5 pixels rejected to eliminate cosmic rays and stars)
1.1" seeing, photometric
processed display
2.9' by 2.7' FOV (plate scale 0.56" / pixel)

73P-G

73P-G on 2006 Apr. 30.38 UT
Vatican 1.8-meter at Mount Graham (MPC code 290) with R filter
26 x 60-second median averaged image (brightest 5 pixels rejected to eliminate cosmic rays and stars)
1.1" seeing, photometric
processed display
2.9' by 2.7' FOV (plate scale 0.56" / pixel)

73P-G on 2006 May 1.3 UT
Vatican 1.8-meter at Mount Graham (MPC code 290) with R filter
28 x 60-second median averaged image (brightest 5 pixels rejected to eliminate cosmic rays and stars) 
1.1" seeing, photometric
processed display
2.9' by 2.7' FOV (plate scale 0.56" / pixel)

73P-G on 2006 May 4.48 UT
SAO 1.2-meter at Mount Hopkins (MPC code 696) with Sloan i filter
21 x 60-second median averaged image (brightest 5 pixels rejected to eliminate cosmic rays and stars) 
1.5" seeing, photometric
processed display
6.7' by 5.8' FOV (plate scale 0.56" / pixel)

Observations of Comet 73P-G/Schwassman-Wachmann 3

All observations by Carl Hergenrother, Lunar and Planetary Lab (LPL), University of Arizona & Smithsonian Astrophysical Observatory (SAO)

73P-G - 2006 Apr. 12.32, 13.32, 15.40, 16.31, 17.48, 18.31, 19.49, 20.31, 21.29, 27.33, 30.34, May 1.3, 4.48 UT

73P-G

73P-G on 2006 Apr. 12.32 UT SAO 1.2-meter at Mount Hopkins (MPC code 696) with Sloan i filter 50 x 20-second averaged image (brightest pixel rejected to eliminate cosmic rays) 1.5" seeing through variable cirrus log display 7.5' by 6' FOV (plate scale 0.67" / pixel)

Contour plot of central 20" x 20"

73P-G on 2006 Apr. 13.32 UT SAO 1.2-meter at Mount Hopkins (MPC code 696) with Sloan i filter 50 x 20-second averaged image (brightest pixel rejected to eliminate cosmic rays) 1.6" seeing through variable cirrus log display 7.5' by 6' FOV (plate scale 0.67" / pixel)

Contour plot of central 20" x 20"

73P-G on 2006 Apr. 15.40 UT SAO 1.2-meter at Mount Hopkins (MPC code 696) with Sloan i filter 30 x 30-second averaged image (brightest pixel rejected to eliminate cosmic rays) 2.0-2.5" seeing through light cirrus and bright moonlight log display 7.5' by 6' FOV (plate scale 0.67" / pixel)

Contour plot of central 20" x 20"

73P-G on 2006 Apr. 16.31 UT SAO 1.2-meter at Mount Hopkins (MPC code 696) with Sloan i filter 20 x 20-second averaged image (brightest pixel rejected to eliminate cosmic rays) 1.3" seeing, photometric, bright moonlight log display 7.5' by 6' FOV (plate scale 0.67" / pixel)

Contour plot of central 20" x 20"

73P-G on 2006 Apr. 17.48 UT SAO 1.2-meter at Mount Hopkins (MPC code 696) with Sloan i filter 6 x 30-second averaged image (brightest pixel rejected to eliminate cosmic rays) 1.7" seeing, photometric, bright moonlight, twilight log display 7.5' by 6' FOV (plate scale 0.67" / pixel)

Contour plot of central 20" x 20"

73P-G on 2006 Apr. 18.31 UT SAO 1.2-meter at Mount Hopkins (MPC code 696) with Sloan i filter 16 x 20-second averaged image (brightest pixel rejected to eliminate cosmic rays) 1.6" seeing, photometric, bright moonlight log display 7.5' by 6' FOV (plate scale 0.67" / pixel)

Contour plot of central 20" x 20"

73P-G on 2006 Apr. 19.49 UT SAO 1.2-meter at Mount Hopkins (MPC code 696) with Sloan i filter 21 x 15-second averaged image (brightest pixel rejected to eliminate cosmic rays) 1.6" seeing, photometric, bright moonlight log display 7.5' by 6' FOV (plate scale 0.67" / pixel)

Contour plot of central 20" x 20"

73P-G on 2006 Apr. 20.31 UT SAO 1.2-meter at Mount Hopkins (MPC code 696) with Sloan i filter 20 x 15-second averaged image (brightest pixel rejected to eliminate cosmic rays) 1.5" seeing, photometric linear display 7.5' by 6' FOV (plate scale 0.67" / pixel)

Contour plot of central 20" x 20"

73P-G on 2006 Apr. 21.29 UT SAO 1.2-meter at Mount Hopkins (MPC code 696) with Sloan i filter 31 x 15-second averaged image (brightest pixel rejected to eliminate cosmic rays) 1.6" seeing, photometric linear display 7.5' by 6' FOV (plate scale 0.67" / pixel)

Contour plot of central 20" x 20"

3P-G on 2006 Apr. 27.33 UT Vatican 1.8-meter at Mount Graham (MPC code 290) with R filter 25 x 60-second median averaged image (brightest 5 pixels rejected to eliminate cosmic rays and stars) 1.1" seeing, photometric processed display 2.9' by 2.7' FOV (plate scale 0.56" / pixel)

73P-G

73P-G on 2006 Apr. 30.38 UT Vatican 1.8-meter at Mount Graham (MPC code 290) with R filter 26 x 60-second median averaged image (brightest 5 pixels rejected to eliminate cosmic rays and stars) 1.1" seeing, photometric processed display 2.9' by 2.7' FOV (plate scale 0.56" / pixel)

73P-G on 2006 May 1.3 UT Vatican 1.8-meter at Mount Graham (MPC code 290) with R filter 28 x 60-second median averaged image (brightest 5 pixels rejected to eliminate cosmic rays and stars) 1.1" seeing, photometric processed display 2.9' by 2.7' FOV (plate scale 0.56" / pixel)

73P-G on 2006 May 4.48 UT SAO 1.2-meter at Mount Hopkins (MPC code 696) with Sloan i filter 21 x 60-second median averaged image (brightest 5 pixels rejected to eliminate cosmic rays and stars) 1.5" seeing, photometric processed display 6.7' by 5.8' FOV (plate scale 0.56" / pixel)