Open Access
Table 1
Log of Observations performed at the ESO and Lulin observatories.
| Date | rH | Δ | PsAng | α | Pixel scale | Observatory |
| (AU) | (AU) | (deg) | (deg) | (km) | ||
|
|
||||||
| 2004 | ||||||
| May 1 | 2.53 | 2.04 | 259.3 | 22.3 | 464.6 | ESO |
| June 16 | 2.81 | 1.85 | 255.3 | 8.4 | 421.3 | ESO |
|
|
||||||
| 2010 | ||||||
| January 14 | 1.64 | 1.10 | 292.7 | 35.5 | 410.8 | Lulin |
| January 15 | 1.64 | 1.09 | 292.6 | 35.4 | 407.1 | Lulin |
| January 16 | 1.64 | 1.08 | 292.5 | 35.4 | 404.0 | Lulin |
| January 17 | 1.64 | 1.07 | 292.5 | 35.4 | 399.7 | Lulin |
| January 18 | 1.64 | 1.06 | 292.4 | 35.3 | 384.7 | Lulin |
| February 26 | 1.60 | 0.78 | 286.8 | 28.7 | 291.3 | Lulin |
| April 7 | 1.66 | 0.67 | 264.8 | 10.3 | 250.3 | Lulin |
| April 24 | 1.71 | 0.70 | 180.5 | 4.8 | 264.2 | Lulin |
| May 4 | 1.74 | 0.75 | 139.2 | 8.7 | 281.0 | Lulin |
| May 20 | 1.81 | 0.86 | 122.2 | 16.1 | 322.0 | Lulin |
| May 31 | 1.86 | 0.96 | 117.8 | 20.1 | 358.9 | Lulin |
| August 1 | 2.19 | 1.80 | 106.6 | 27.3 | 672.7 | Lulin |
Notes. rh and Δ are the geocentric and heliocentric distances in AU. PsAng is the position of the extended Sun-comet vector, measured from north toward east. α is the phase angle Sun-comet-observer.
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