David's Astronomy Pages (Solar System)
Comets - 2003

Bullet Comet Images (2003) This page summarises observations and images of comets in 2004
Bullet 123P/ West-Hartley (Mar)
Bullet C/2001 HT50 - Comet (Aug)
Bullet 78P/Gehrels (Sep-Dec) (-Jan 2005)
Bullet C/2004 Q2 (Machholz) (Dec) (-Jan 2005)
Bullet Comet 62P Tsuchinshan (Dec)
Bullet Comet 32P/Comas Sola (Dec)

 


Comet 123P/ West-Hartley

123P West-Hartley
Image 
CCD  Image, 5 x 60 sec exposure (median combine)
2004-03-29  01:27 h UT (#64231-35)

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C/2001 HT50

C/2001 HT50 (passing through star field in Pegasus), 2004-08-20
Image 
CCD  Image, 5x60 sec exposure (average combine)
Clear Filter
2004-08-20  22:10 to 22:18 h UT (#66065-69)
 
Image
CCD  Animation,  5 sets of 3x60 sec exposure (median combine)
Taken over 3 hours
2004-08-20  23:10  to 2004-08-21 02:08h UT (#66065-69)
 
C/2001 HT50 - 2004-08-22
Image 
CCD  Image, 3 x 60 sec exposure, C filter
2004-08-22  22:08h UT (#68053-55)

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78P/Gehrels 

78P/Gehrels (passing through Aries) - 2004-09-01
Image 
CCD  Image, 4 x 60 sec exposure (median combine)
Clear Filter
2004-09-01  01:03 to 01:08 h UT (#69130-33)
 
78P/Gehrels - false colour 
Image 
False Colour CCD  Image, scaled to show comet coma and tail
4 x 60 sec exposure (median combine)
Clear Filter
2004-09-01  01:03 to 01:08 h UT (#69130-33)
 
78P/Gehrels (passing through Aries), 2004-09-18
Image
CCD  Image, 9 x 30 sec exposure (average combine)
Clear Filter
2004-09-18  23:30 h UT (#72046-54)
 
Image 
Animated CCD  Image, 3 images taken at c. 1 hour interval,
each 3 x 30 sec exposure (average combine), C Filter
2004-09-18 23:26h UT to  2004-09-19 01:17h UT 
 
Comet 78P/Gehrels  (passing through Aries)
Image
CCD Image
9 x 30s exposure (average combine),  C Filter
2004-12-18 21:22 h UT (#80035-43)
 
Comet 78P/Gehrels   - longer exposure
Image
CCD Image
5 x 2 min exposure (average combine),  C Filter
2004-12-18 21:12 h UT (#80030-34)
 
Comet 78P/Gehrels  motion
(image above compared with image taken 3h 20m later)
Image
CCD Image Animation
5 x 2 min exposure (average combine) &
3 x 2 min exposure (average combine),  C Filter
2004-12-18 21:12h UT (#80030-34)
2004-12-19 00:37hUT (#80131-33)
 
Comet 78/P Gehrels (passing through Aries),   2005-01-05
Image
CCD Image 
3 x 60 sec exposure (Median Combine),  C Filter
2005-01-05  21:25 h UT (#82056-58)

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Comet - C/2004 Q2 (Machholz)

Comet C/2004 Q2 (Machholz) - 2004-12-18
 (passing through Eridanus)
Image
CCD Image
2 min exposure,  C Filter
2004-12-18 22:25 h UT (#80070)
Comet C/2004 Q2 (Machholz) motion
(motion measured at 3.44 arc sec/hour)
Image
CCD Image Animation - aligned on comet
16 frames, 2 min exposure,  C Filter
2004-12-18 21:28 h to 23:52h UT (#80045-110)
(Animation with 66 frames was also created)
 
Comet C/2004 Q2 (Machholz) motion
Image
CCD Image Animation - aligned on stars
16 frames, 2 min exposure,  C Filter
2004-12-18 21:28 h to 23:52h UT (#80045-110)
 
Comet C/2004 Q2 (Machholz) - 
grey-step8 scale
Image
CCD Image
2 min exposure,  C Filter
2004-12-18 22:25 h UT (#80070)
 
Comet C/2004 Q2 (Machholz) - 
Image
CCD Image
66 x 2 min exposure (average combine),  C Filter
2004-12-18 21:28 h to 23:52h UT (#80045-110)
 
Comet C/2004 Q2 (Machholz) - 2004-12-28
 (passing through Taurus)
Image
CCD Colour Composite Image
Blue (av 3 x 60s B Filter, 165%), Green (av 3 x 30s V Filter,115%), Red (av 3 x 30s R Filter, 100%) 
2004-12-28 23:33 h UT (#81058-69)
Comet C/2004 Q2 (Machholz) in star field of  1° 10' x 0° 55'
Coma is around 14 arc min diameter, but no sign of any tail is recorded.
Image
CCD Image Mosaic (30 frames)
60 sec exposure,  C Filter
2004-12-28  22:38 h to 23:25h UT (#81023-56)
(Due to motion of comet between frames, a minor amount of blending 
was required at boundaries of certain frames)
[ Full Size Image ]
 
Comet C/2004 Q2 (Machholz) - 2005-01-05
(passing through Taurus) 
Image
CCD Colour Composite Image
Blue (av 2 x 120s B Filter, 115%), Green (60s V Filter,120%), Red (60s R Filter, 100%) 
2005-01-05 21:04 h UT (#82043-46)
Comet C/2004 Q2 (Machholz) 
Image
CCD Colour Composite Image
Blue (av 2 x 90s B Filter, 100%), Green (30s V Filter,115%), Red (30s R Filter, 100%) 
2005-01-05 23:43 h UT (#82121-24)
  
Comet C/2004 Q2 at 20:04h UT
Image 
CCD Image
30 sec exposure,  C Filter
2005-01-05 20:04 h UT (#82026)
 
Comet C/2004 Q2 at 21:20h UT
Apparent motion of 5.54 arc min/hour
(This is significant faster than 3.44 arc min/hour motion 
measured  2004-12-18, 18 days previously )
Image 
CCD Image
30 sec exposure,  C Filter
2005-01-05 21:20 h UT (#82052)

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62P/ Tsuchinshan

Comet 62P Tsuchinshan - 2004-12-11
 (passing through Leo)
Image
CCD Image
2 min exposure,  C Filter
2004-12-11 05:50 h UT (#79015)

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32P/Comas Sola

Comet 32P/Comas Sola  -2004-12-18
(passing through Aries)
Image
CCD Image
5 x 2 min exposure (median combine),  C Filter
2004-12-18 19:59h UT (#80006-10)
 
Comet 32P/Comas Sola (Colour)
Image
CCD Colour Image Composite
Luminance (3 x 2 min, medium combine, C),  
Red (3 x 2 min, medium combine, R),  
Green (3 x 2 min, medium combine, V)
Blue (6 x 2 min, medium combine, B, 255%)
2004-12-18 20:39 h UT (#80013-28)
 
Comet 32P/Comas Sola Motion over 5 hour period
Image
CCD Image Animation
3 x 2 min exposure (average combine),  C Filter
2004-12-18 19:58h UT (#80006-09)
2004-12-19 01:04hUT (#80142-44)

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