Table 2
Geometry of coma structures found with Larson-Sekanina image-enhancing technique.
| Date | Filter | PA − FWHM(°) | PA⊙(°) |
|
|
|||
| Apr. 14 | NAC orange | 357–22 | 122 |
| Apr. 17 | NAC orange | 356–56 | 121 |
| Apr. 19 | NAC orange | 352–35 | 121 |
| Apr. 20 | NAC orange | 358–49 | 121 |
| Apr. 24 | NAC orange | 354–50 | 121 |
| Apr. 27 | NAC orange | 356–56 | 121 |
| Apr. 30 | NAC orange | 353–58 | 121 |
| May 4 | NAC orange | 332–40 | 120 |
| May 7 | NAC orange | 331–45 | 120 |
| May 11 | NAC orange | 343–48 | 120 |
| May 14 | NAC orange | 352–43 | 120 |
| May 18 | NAC orange | 352–31 | 119 |
| June 24 | WAC visible-610 | 339–35 | 115 |
Notes. Examples of images enhanced with this technique are shown in Fig. 9. PA and FWHM are the position angle counted counterclockwise (east) from the north celestial pole and the width of the structure, respectively. PA⊙ is the position angle of the extended Sun-target radius vector as seen in the observer’s plane-of-sky. NAC and WAC measures refer to 400 km and 150 km from the nucleus, respectively, so care should be taken in directly comparing the angles found.
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