David's Astronomy Pages (Solar System) Comets - 2004

Comets 2004

Comets

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	Comet Images (2004)		This page summarises observations and images of comets in 2004
	C/2002 T7 (Linear) (Feb)
	123P/ West-Hartley (Mar)
	C/2001 HT50 - Comet (Aug)
	78P/Gehrels (Sep-Dec) (-Jan 2005)
	C/2004 Q2 (Machholz) (Dec) (-Jan 2005)
	Comet 62P Tsuchinshan (Dec)
	Comet 32P/Comas Sola (Dec)

C/2002 T7 (Linear)

C/2002 T7 (Linear) - 2004-02-19 (passing through star field in Pegasus)

CCD Image, 14 x 20 sec exposure (summed) 2004-02-19  19:27 h UT (#58079-93)

Colour CCD Image Red 5x20s (av), Green 5x20s (av), Blue 5x30s (av), Luminance 12x10s (av) 2004-02-19  19:32 to 19:49h UT (#58048-76)

CCD Image, 12 x 10 sec exposure (average) Contrast adjusted 2004-02-19  19:32 to 19:38 h UT (#58048-59)

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123P/ West-Hartley

Comet 123P/ West-Hartley - 2004-03-29

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

Comet C/2001 HT50 - 2004-08-20 (passing through star field in Pegasus)

CCD  Image, 5x60 sec exposure (average combine) Clear Filter 2004-08-20  22:10 to 22:18 h UT (#66065-69)

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)

Comet C/2001 HT50 - 2004-08-22

CCD  Image, 3 x 60 sec exposure, C filter 2004-08-22  22:08h UT (#68053-55)

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78P/Gehrels 

Comet 78P/Gehrels - 2004-09-01 (passing through Aries)

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

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 - 2004-09-18  (passing through Aries)

CCD  Image, 9 x 30 sec exposure (average combine) Clear Filter 2004-09-18  23:30 h UT (#72046-54)

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 - 2004-12-18 (passing through Aries)

CCD Image 9 x 30s exposure (average combine),  C Filter 2004-12-18 21:22 h UT (#80035-43)

Comet 78P/Gehrels   - longer exposure

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)

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 - 2005-01-05 (passing through Aries)

CCD Image  3 x 60 sec exposure (Median Combine),  C Filter 2005-01-05  21:25 h UT (#82056-58)

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C/2004 Q2 (Machholz)

Comet C/2004 Q2 (Machholz) - 2004-12-18  (passing through Eridanus)

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)

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

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

CCD Image 2 min exposure,  C Filter 2004-12-18 22:25 h UT (#80070)

Comet C/2004 Q2 (Machholz) -

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)

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.

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)

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)

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

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 )

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)

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)

CCD Image 5 x 2 min exposure (median combine),  C Filter 2004-12-18 19:59h UT (#80006-10)

Comet 32P/Comas Sola (Colour)

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

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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