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| Optics | Takahashi FS-128 Apochromatic refractor |
| Focal Length | 1040 mm |
| Focal Ratio | f/8.1 |
| Exposure Time | 90 min exposure |
| Film | un-hypered 35mm Elite Chrome 200 slide film |
| Location | Berkshire, New York |
| Date and time of exposure start | 3/16/2002 |
| Mount | Mountian Instruments, MI-250 NON=GOTO |
| Tracking | ST4, A1-A2 average error |
| Temperature | 18F |
| Notes | M51 mag: 8.4. The companion galaxy is NGC5195 @ mag 9.6 Distance: 31 to 37 million light years. |
Joseph Schaefer 2002