Table 1
Observing conditions for the NAC images.
| 2015 |  |
N |
 |
rh (AU) | Δ (km) | Res. (m px−1) | Avg.(c) |
|---|---|---|---|---|---|---|---|
| June 27 | 24 | 19 | 89.3–89.7 | 1.365 | 182.8–198.3 | 3.4–3.7 | 0.8 |
| July 26 | 33 | 56 | 89.9 | 1.262 | 167.3–169.2 | 3.2 | 1.7 |
| August 1 | 29 | 101 | 89.4–89.7 | 1.251 | 206.4–215.0 | 4.0 | 3.4 |
| August 9 | 31 | 19 | 89.0–89.2 | 1.244 | 303.9–310.0 | 5.8 | 0.5 |
| August 12 | 23 | 10 | 89.4–89.7 | 1.243 | 327.2–336.2 | 6.3–7.0 | 0.4 |
| August 23 | 16 | 31 | 87.3–88.5 | 1.250 | 329.9–336.7 | 6.2–6.3 | 1.9 |
| August 30 | 24 | 126 | 70.0–70.2 | 1.261 | 402.5–405.1 | 7.6 | 5.3 |
| September 5 | 15 | 26 | 99.7–102.6 | 1.276 | 393.3–441.5 | 7.4–8.3 | 1.7 |
| October 11 | 12 | 16 | 60.9–61.5 | 1.437 | 520.1–529.2 | 9.7–9.9 | 1.3 |
| October 21 | 12 | 26 | 64.0–64.4 | 1.487 | 420.1–422.5 | 7.9 | 2.2 |
| October 31 | 13 | 42 | 61.6–63.0 | 1.565 | 287.2–305.0 | 5.4–5.7 | 3.2 |
Notes. α is the phase angle, rh is the heliocentric distance, and Δ is the distance between comet and spacecraft. Each sequence consists of images acquired with the 11 filters of the NAC camera: F22 (649.2 nm), F23 (535.7 nm), F24 (480.7 nm), F16 (360.0 nm), F27 (701.2 nm), F28 (743.7 nm),F41 (882.1 nm), F51 (805.3 nm), F61 (931.9 nm), F71 (989.3 nm), and F15 (269.3 nm). (a) Number of analyzed sequences on the date. The sequences usually cover slightly more than one rotation period of the comet. (b) This entry specifically refers to the number of jets that have been successfully located on the surface, not to the total number of jets. Some jets originate from behind the limb, and we cannot precisely locate their source region. (c) This is the average number of detected jets per sequence for a given date.
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