The Tracks of the Marsden Comets in C2 (and here in C3)
The Tracks of the Meyer Comets in C2
The Tracks of the Kracht Comets in C2
The Tracks of the Kracht2 Comets in C2

The tracks are drawn for the 15th day of each month.
The tracks are running from red to blue to gray.
(Jan, Feb, Mar, Oct, Nov, Dec: left to right)
(Apr, May, Jun; Jul; Aug, Sep: right to left)
The first gray number is at the perihelion of the orbit.
Numbers are drawn every 30 minutes.
The numbers give the velocities in pixel/hour for the C2 1024*1024 images.

The elements used are the weighted means of the elements of the twelve confirmed Marsden comets (2002 July):

q = 0.0487, peri = 23.0, node = 81.9, incl = 26.4 deg (L = 102.7, B = +10.0).

The weights are the lengths of the observation times (last obs - first obs).

C/1998 A2 0.10 days (from T+0.14 to +0.24 days in C2)
C/1998 A3 0.14 days (from T+0.16 to +0.30 days in C2)
C/1998 A4 0.10 days (from T+0.19 to +0.29 days in C2)
C/1999 J6 1.66 days (from T-0.86 to -0.13 days in C2 and T-0.14 to +0.80 in C3)
C/1999 N5 0.84 days (from T-0.30 to +0.32 days in C2 and T+0.33 to +0.54 in C3)
C/1999 P6 0.25 days (from T-0.05 to +0.20 days in C2)
C/1999 P8 0.23 days (from T+0.01 to +0.24 days in C2)
C/1999 P9 0.36 days (from T+0.19 to +0.55 days in C2)
C/1999 U2 1.28 days (from T-0.77 to -0.39 days in C2 and T-0.01 to +0.51 in C3)
C/2000 C7 0.11 days (from T+0.00 to +0.11 days in C2)
C/2000 C3 0.54 days (from T-0.03 to +0.52 days in C2)
C/2000 C4 0.77 days (from T-0.01 to +0.50 days in C2 and T-0.27 to -0.06 in C3)

All observations are close to the time of perihelion (T).
In C2 the times are from T-0.77 to T+0.55 and in C3 the times are from T-0.14 to T+0.80 days.
The following C2 tracks run from T-1.00 to T+1.00 days.

Tracks of the known Marsden comets (2002 Mar 18):

C/1998 A2 (1998 January 03 21:07 - 23:32 UTC) MPEC 2002-E25
Drawn are the mean Marsden orbit for 22:20 UTC and the measured positions (black circles).

The velocities derived from the positions are 82 (21:07 - 22:07) and 79 pixel/h (22:07 - 23:32).
This is the fifth member of the Marsden group.

C/1998 A3 (1998 January 09 11:08 - 14:28 UTC) MPEC 2002-E25
Drawn are the mean Marsden orbit for 12:48 UTC and the measured positions (black circles).

The velocities derived from the positions are 83 (11:08 - 13:05) and 79 pixel/h (12:16 - 14:28).
This is the sixth member of the Marsden group.

C/1998 A4 (1998 January 10/11 23:28 - 01:57 UTC) MPEC 2002-F70
Drawn are the mean Marsden orbit for 00:42 UTC and the measured positions (black circles).

The velocities derived from the positions are 85 (23:28 - 00:30) and 82 pixel/h (00:55 - 01:57).
This seems to be a member of the Marsden group.

C/1999 J6 1999 May 10/11 17:06 - 11:06 UTC in C2 (MPEC 2000-F30)
all obs: T-0.86 to T+0.80 days
Drawn are the mean Marsden orbit for 02:00 UTC and the measured positions (black circles).

The velocities derived from the positions are 55 (17:06-18:44), 60 (00:50-03:06)
and 57.5 pixel/h (09:06-11:06).
This is the best observed member of the Marsden group.
It was seen in C3 until 1999 May 12 09:18 UTC.

C/1999 N5 (1999 July 11 09:30 - 13:31 UTC) MPEC 2002-F03
Drawn are the mean Marsden orbit for 11:30 UTC and the measured positions (black circles).

The velocities derived from the positions are 70 (09:30-10:30) and 66 pixel/h (12:30-13:31).
It was seen in C2 from July 10 22:30 and in C3 until 1999 July 11 18:42 UTC.

C/1999 P6 (1999 August 05 01:27 - 06:50 UTC) MPEC 2002-F43
Drawn are the mean Marsden orbit for 04:09 UTC and the measured positions (black circles).

The velocities derived from the positions are 67 (01:27-02:26) and 71 pixel/h (05:50-06:50).
There could be additional images in C2.

C/1999 U2 1999 October 25 was observed in C2 and C3.
C2: from T-0.77 to T-0.39 days
C3: from T-0.01 to T+0.51 days

C/2000 C3 2000 February 04/05 13:31 - 02:30 UTC in C2
only in C2: T-0.28 to T+0.27 days
Drawn are the mean Marsden orbit for 20:00 UTC and the measured positions (black circles).

The velocities derived from the positions are 74 (13:31-15:30), 81 (18:12-20:16)
and 74 pixel/h (00:35-02:30).

C/2000 C4 2000 February 05 04:30 - 15:30 UTC in C2
In C2: T-0.28 to T+0.23 days, in C3: T-0.54 to T-0.33 days.
Drawn are the mean Marsden orbit for 10:00 UTC and the measured positions (black circles).

The velocities derived from the positions are 76 (04:30-06:30), 80 (08:30-11:30)
and 76 pixel/h (13:30-15:30).