Table 4
Tail-like structure as measured in our images of 67P/C-G.
| Date | PAmeasured [°] | SB [mag/″2] | d [105 km] | l [105 km] | w [104 km] | PAv [o] | PANL [o] |
|
|
|||||||
| April 2004 | 295.7 ± 0.2 | 26.2 ± 0.1 | ~1.3 | ~3.9 | ~6.7 | 296.8 | 295.9 ± 0.2 |
| June 2004 | 298.1 ± 0.2 | 27.3 ± 0.1 | ~1.5 | ~4.8 | ~2.5 | 297.2 | 298.4 ± 0.2 |
| May 2006 | 285.6 ± 0.2 | 27.6 ± 0.2 | ~3.8 | ~5.1 | ~2.5 | 285.4 | 285.7 ± 0.2 |
| July 2007 | – | >27.5 | – | – | – | 279.0 | 279.8 ± 0.3 |
Notes. PAmeasured is its position angle measured north over east. The peak surface brightness (SB) of the tail-like structure is reported with the distance d (in km at the projected distance of the comet) from the nucleus where the cross-cut to determine it was extracted, the length l and the width w of the tail-like structure (in km projected distance at the comet). PAv is the direction of heliocentric velocity vector of the comet projected in the sky (from http://ssd.jpl.nasa.gov/horizons.cg) and PANL is position angle of the neck-line as predicted by dust tail simulations.
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