Table 4

Photometry from archival data.

Date Inst. Na rb ΔTc m R mR(r,1,0)d m R mR(r,1,0) Afρe Slope Calib.f
(AU) (days) (ρ = 10   000 km) (ρ = 5′′) (cm)

1996 apparition:
25/06/1995 EFOSC 3 –2.50 –205 17.46 15.61 17.60 15.75 46 –1.93 APASS
12/12/1995 EMMI 1 –1.37 –36 13.15 12.22 13.87 12.94 317 –1.28 APASS

2002 apparition:
09/09/2002 KISO 13 1.32 22 13.34 11.45 13.94 12.05 598 –1.90 SDSS
11/12/2002 SDSS 1 1.84 115 15.35 13.70 15.97 14.31 146 –1.29 SDSS
10/02/2003 EFOSC 1 2.30 177 15.57 14.57 16.39 15.39 103 –1.21 SDSS
08/03/2003 EFOSC 10 2.49 203 15.91 14.94 16.68 15.70 86 –1.21 SDSS
25/03/2003 EMMI 2 2.61 220 16.61 15.30 17.26 15.95 67 –1.21 SDSS
30/04/2003 FORS 5 2.86 256 18.08 15.97 18.38 16.27 44 SDSS
01/05/2003 FORS 5 2.87 257 18.06 15.93 18.35 16.22 45 –1.00 SDSS
02/05/2003 FORS 8 2.87 258 18.10 15.95 18.38 16.23 45 –0.70 SDSS
03/05/2003 FORS 9 2.88 259 18.13 15.96 18.40 16.24 45 –1.15 SDSS
04/05/2003 FORS 7 2.89 260 18.18 16.00 18.44 16.26 43 SDSS
03/06/2003 FORS 2 3.08 290 18.93 16.23 18.83 16.13 40 –0.82 SDSS
04/06/2003 FORS 1 3.09 291 19.20 16.49 19.11 16.40 32 –1.24 SDSS
19/06/2003 FORS 2 3.19 306 19.42 16.51 19.18 16.27 33 –0.94 SDSS
20/06/2003 FORS 1 3.19 307 19.42 16.50 19.18 16.26 33 –1.07 SDSS
23/06/2003 FORS 1 3.21 310 19.50 16.55 19.23 16.27 32 –1.59 SDSS
24/06/2003 FORS 1 3.22 311 19.47 16.50 19.19 16.23 34 –1.41 SDSS
23/02/2004 SUSI 4 4.47 555 21.50 18.27 21.10 17.87 13 –2.21 ESO (n)
29/04/2004 EFOSC 5 4.73 621 21.65 18.76 21.56 18.67 9 –2.38 SDSS
16/06/2004 FORS 10 4.89 669 22.42 19.05 22.04 18.67 7 –2.60 Tubiana

2009 apparition:
30/05/2006 FORS 61 –5.61 –1005 22.68 19.36 22.65 19.32 7 –2.64 ESO (n)
17/08/2006 FORS 3 –5.51 –926 23.13 19.32 7 Tubiana
27/03/2008 FORS 7 –3.39 –338 20.38 17.19 20.29 17.10 20 Landolt
29/03/2008 FORS 7 –3.38 –336 20.47 17.30 20.57 17.40 18 –2.55 Landolt
30/03/2008 FORS 7 –3.38 –335 20.30 17.13 20.28 17.11 21 –2.50 Landolt
31/05/2008 FORS 8 –2.98 –273 18.90 16.54 18.93 16.57 28 –1.97 Landolt
03/06/2008 FORS 8 –2.96 –270 18.76 16.45 18.80 16.50 30 –1.91 Landolt
04/06/2008 FORS 8 –2.95 –269 18.78 16.49 18.83 16.54 29 –1.89 Landolt
04/07/2008 FORS 6 –2.75 –239 17.77 16.10 17.90 16.23 36 –1.92 Landolt
10/08/2008 FORS 5 –2.48 –202 16.16 15.22 16.51 15.56 66 –1.72 Landolt
03/09/2008 FORS 16 –2.30 –178 16.23 15.22 16.58 15.57 56 –1.70 ESO (n)
05/09/2008 FORS 16 –2.28 –176 15.90 14.87 16.27 15.24 77 –1.79 Landolt
06/09/2008 FORS 16 –2.28 –175 15.96 14.93 16.32 15.28 73 –1.62 Landolt
07/09/2008 FORS 16 –2.27 –174 16.21 15.17 16.56 15.51 58 –1.63 ESO (n)
13/09/2008 FORS 1 –2.22 –168 15.94 14.84 16.27 15.17 75 –1.77 Landolt
21/10/2008 FORS 5 –1.93 –130 15.99 14.47 16.31 14.80 79 –1.71 ESO (n)
25/10/2008 FORS 5 –1.90 –126 15.81 14.26 16.16 14.60 93 –1.85 ESO (n)
26/10/2008 FORS 5 –1.89 –125 16.01 14.45 16.33 14.76 78 –1.86 ESO (n)
25/01/2009 LOT –1.31 –34 13.52 11.69 476 Lara
28/01/2009 EFOSC 3 –1.30 –31 13.62 11.79 13.97 12.13 426 –1.65 ESO (d)
30/01/2009 LOT –1.29 –29 13.46 11.62 490 Lara
31/01/2009 LOT –1.29 –28 13.46 11.63 486 Lara
23/02/2009 LOT –1.25 –5 13.05 11.21 666 Lara
25/02/2009 LOT –1.25 –3 13.37 11.53 497 Lara
26/02/2009 LOT –1.25 –2 12.97 11.12 721 Lara
12/03/2009 LOT 1.26 12 12.87 11.01 813 Lara
19/03/2009 CAFOS 1.27 19 13.04 11.16 724 Lara
15/02/2010 EFOSC 5 3.49 352 19.93 17.34 19.86 17.27 19 –1.88 SDSS
16/02/2010 EFOSC 3 3.49 353 20.02 17.44 19.96 17.38 17 –2.29 SDSS
14/07/2010 EFOSC 3 4.26 501 21.74 18.30 21.15 17.72 11 SDSS

Notes.

(a)

Number of images used.

(b)

Heliocentric distance. Negative numbers indicate pre-perihelion, positive post-perihelion.

(c)

Time before or after perihelion date.

(d)

Magnitude reduced to unit geocentric distance and zero phase angle.

(e)

Using ρ = 10 000 km at the comet, and corrected to zero phase angle.

(f)

Calibration source for each night: APASS / SDSS – field stars from these catalogues; ESO – nightly (n) or default (d) zeropoints from ESO web page; Landolt – zeropoint calculated using observations of Landolt/Stetson standard stars on the same night; Tubiana – zeropoint solutions taken from Tubiana (2008) (from Landolt stars); Lara – photometry calculated from Afρ values reported in Lara et al. (2011). The Afρ value quoted here has been corrected to zero phase (Lara measurements were all taken at ~36°).

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