All Tables

Table 1: Observational data and geometrical circumstances. No: Serial number of the observation. Obs: Observer (DT - Diego Tirelli, Italian Group of Comet Observers; MJ & GR - Michael Jäger & Gerald Rhemann, Astrostudio G. Rhemann Ges. m. b. h). Date UT (2004): Time at midexposure. RA, Dec: right ascension and declination of the comet nucleus, respectively, measured directly on the CCD images through astrometric calibration. $\Delta$ , r: Earth-comet and Sun-comet distances. $\phi$ : Phase angle. $\nu$ : True anomaly of the comet nucleus. $\beta$ : Cometocentric latitude of the Earth; it is positive when the Earth is in the comet north hemisphere.
Table 2: RSS, SWS and NL parameters. No.: serial number of the observation. PA $_{\rm RSS}$ : measured position angle on the sky of the average orientation of the RSS. PA $_{\rm SWS}$ : measured position angle on the sky of the SWS. PA $_{\rm RV}$ : computed position angle on the sky of the Sun-comet radius vector. PA $_{\rm +V}$ : computed position angle on the sky of the positive velocity vector. NLp: NL point sequential number (Fig. 1). (1 $-\mu$ ): radiation pressure acting on the dust grain. $\tau$ : days elapsed between ejection of the dust grain from the comet nucleus and observation. d $[^{\circ }]$ , d [10⁶ km]: angular (in the plane of the sky) and linear (in the plane of the comet orbit) distance from the nucleus of the computed NL point, respectively. PA $_{\rm NL}$ : position angle of the sky-projected NL point. oPA $_{\rm NL}$ : orbital position angle of the NL point. Position angles in the plane of the sky are measured from north to east, as usual, whereas the ones in the plane of the comet orbit (prefix o) are measured counterclockwise from the Sun-comet prolonged radius vector (r').