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Table 1:

Previous observations and nucleus size estimates for 103P.

Date 		$R_{\rm h}$a $\Delta$b $\alpha$c mRd $r_{\rm N}$e Ref.f
Ground-based optical:  
28/03/93 4.7 3.8 3.3 20.1 $\le$5.3 L00
10/12/98 3.6 3.9 14.3 19.0 $\le$6.4 LF01
08/06/99 4.6 4.2 12.5 20.1 $\le$6.3 L03
06/03/05 3.2 2.3 5.0 18.7 $\le$4.1 S06
03/04/05 3.4 2.5 7.9 19.1 $\le$4.3 ME08
01/03/06 5.0 4.3 8.3 21.0 $\le$4.5 S08
Space-based infrared:  
05/02/98 1.2 0.9 53.2 - $0.71\pm0.13$ G04g
12/08/08 5.5 4.9 9.5 - $0.57\pm0.08$ L09

Notes. (a) Heliocentric distance (AU): All post-perihelion except for L09; (b) geocentric distance (AU); (c) solar phase angle (degrees); (d) R-band magnitude. (e) nucleus radius (or upper limit) in km assuming 4% albedo and phase function of 0.035 mag deg-1; (f) L00: Licandro et al. (2000); LF01: Lowry & Fitzsimmons (2001); L03: Lowry et al. (2003); S06, S08: Snodgrass et al. (2006,2008); ME08: Mazzotta Epifani et al. (2008); G04: Groussin et al. (2004); L09: Lisse et al. (2009); (g) based on a coma subtraction technique.


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