Table 1
Summary of observing epochs used and relevant orbital elements: days from perihelion, helio- and geo-centric distances, true anomaly, phase angle (“Sun-target-observer” angle).
| Date | ΔTP | r (AU) | Δ (AU) | ν° | S-T-O° | PsAng° | PsAMV° | A° | B 1 ° | B 2 ° | T° | C° |
|
|
||||||||||||
| 2009-Jan.-25 | –34 | 1.315 | 1.671 | 329.9 | 36.1 | 67.8 | 238.0 | 52 | 155 | 214 | 235 | 320 |
| 2009-Jan.-30 | –29 | 1.297 | 1.670 | 334.0 | 36.1 | 67.5 | 237.7 | 42 | 124 | 180 | 231 | ND |
| 2009-Feb.-18 | –10 | 1.253 | 1.673 | 350.6 | 35.9 | 67.2 | 238.2 | 55 | 120 | 165 | 235 | 300 |
| 2009-Feb.-26 | –2 | 1.246 | 1.680 | 357.8 | 35.8 | 67.5 | 239.1 | 53 | 110 | 170 | 239 | 300 |
| 2009-Mar.-12 | +12 | 1.254 | 1.707 | 10.5 | 35.1 | 69.0 | 241.9 | 80 | 160 | 220 | 240 | ND |
| 2009-Mar.-19 | +19 | 1.267 | 1.729 | 16.7 | 34.6 | 70.2 | 243.9 | 80 | 160 | 220 | 242 | ND |
| 2009-Apr.-11 | +42 | 1.345 | 1.844 | 35.8 | 32.0 | 76.0 | 252.5 | 100 | 170 | 230 | 257 | ND |
Notes. PsAng indicates the position angle of the extended Sun-comet vector. PsAMV gives the position angle of the anti-velocity vector. Columns A,B1,B2,T,C are the position angles at the coma center of all structures identified in our images, T being the dust trail. The given position angles refer to the center lines of the structures and have an uncertainty of a few degrees. North = 0°, east = +90°. Structures are sorted by increasing position angle. See Fig. 5 for reference. ND = not detected unambiguously.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.