Dust mass-loss rate of target comets (blue open squares: values computed for the reference velocity of v = 20 m/s; blue vertical lines: min-max range computed by means of the photometric model for grain velocity from 1 to 50 m/s) compared to values for several minor bodies: SPCs (black dots: single observations; black vertical lines: min-max range derived for typical/depleted comet classification or range computed by means of the photometric model for different grain velocity values; see Mazzotta Epifani & Palumbo (2011; their Fig. 12) and references therein), active Centaurs (red stars: single observations; red vertical lines: min-max range computed by means of the photometric model for different grain velocity values; see Mazzotta Epifani et al. 2006, 2011; Bauer et al. 2003; Ivanova et al. 2011), and LPCs (blue triangles: single observations; blue vertical lines: min-max range computed by means of the photometric model for different grain velocity values; see Fulle et al. 1998; Mazzotta Epifani et al. 2009; Ivanova et al. 2011).