Table 2
Geometry of the coma features found with image-enhancing techniques.
| Date | Feature | PA − FWHMLS (°) | PA − FWHMAL (°) | PA⊙ (°) |
|
|
||||
| Feb. 9 | A | 64 – 8 | A + B: 79 – 37 | 290 |
| B | 82 – 12 | |||
| C | 102 – 2 | 102 – 2 | ||
| T | 289 – 7 | 289 – 4 | ||
|
|
||||
| Mar. 10 | SA | 70 – 30 | 70 – 24 | 284 |
| T | 280 – 29 | 280 – 24 | ||
|
|
||||
| Mar. 22 | SA | 66 – 32 | 69 – 40 | 280 |
| T | 266 – 43 | 266 – 27 | ||
|
|
||||
| Apr. 22 | AA | 56 – 14 | nd | 193 |
| SA | 265 – 34 | 266 – 21 | ||
| T | nd | nd | ||
|
|
||||
| May 3 | AA | 73 – 23 | nd | 143 |
| SA | 267 – 19 | 268 – 22 | ||
| T | 136 – 19 | nd | ||
|
|
||||
| May 10 | AA | 60 – 19 | nd | 131 |
| SA | 269 – 25 | 267 – 28 | ||
| T | 138 – 24 | nd | ||
|
|
||||
| Jun. 15 | SA | 270 – 47 | 271 – 30 | 114 |
| T | 117 – 44 | 114 – 23 | ||
|
|
||||
| Jun. 16 | SA | 272 – 28 | 271 – 33 | 114 |
| T | 120 – 33 | 116 – 26 | ||
|
|
||||
| Jul. 3 | SA | 268 – 34 | 270 – 22 | 111 |
| T | 115 – 36 | 116 – 23 | ||
|
|
||||
| Aug. 4 | SA | 265 – 33 | 266 – 34 | 106 |
| T | 106 – 23 | 103 – 21 | ||
|
|
||||
| Sep. 9 | SA | 265 – 26 | 260 – 28 | 101 |
| T | 93 – 31 | 95 – 36 | ||
Notes. PA and FWHM are the position angle counted counterclockwise (east) from the north celestial pole and the width of the different coma features found with Larson-Sekanina (LS) and adaptive Laplace (AL) image-enhancing techniques, respectively. PA⊙ is the position angle of the extended Sun-target radius vector as seen in the observer’s plane-of-sky. nd stands for “not detected”.
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