Chart 1 C/2009 P1 (Garradd) period 24 June - 9 July 2011
The aim of this service is to provide charts (using Guide 8.0) and suitable comparison stars
for relatively bright comets, i.e. brighter than magnitude 10-11, to aid observers in making
brightness estimates.
To avoid confusion with Flamsteed numbers we have underlined the magnitudes of all comparison stars.
Stars with B-V<1.0 were selected where possible; those with B-V>1.0 are given in italics, and should
only be used when no suitable alternatives are available.
The source of the comparison stars on these standard charts is primarily the Tycho-2 catalog, of which
only VT-magnitudes are used.
When reporting data to the ICQ (International Comet Quarterly)
the source code thus should be given as TK, unless indicated otherwise.
We plan to issue new charts on a regular basis, if possible not later than 2 days before the date of first observation.
Occasionally we also issue special charts for fainter comets that are of particular interest.
Below magnitude 10-11 comparison stars usually are taken from a different source (such as ASAS-3
with ICQ code AU and TASS4 with ICQ code TA), because Tycho-2 is becoming very unreliable here.It should be noted also that the ICQ advises against the use of Tycho-2 for comets fainter than magnitude 10.5.
So be sure to always check the proper code(s) given on the top right corner of the chart.
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Currently we have charts available for:
C/2009 P1 (Garradd)
29P/Schwassmann-Wachmann 1
see below...
C/2009 P1 (Garradd)
Chart 1 C/2009 P1 (Garradd) period 24 June - 9 July 2011
Chart 2 C/2009 P1 (Garradd) period 9 July - 20 July 2011
Chart 3 C/2009 P1 (Garradd) period 20 July - 28 July 2011
Chart 4 C/2009 P1 (Garradd) period 28 July - 6 August 2011
Chart 5 C/2009 P1 (Garradd) period 6 August - 14 August 2011
Chart 6 C/2009 P1 (Garradd) period 22 August - 30 August 2011
Chart 7 C/2009 P1 (Garradd) period 30 August - 7 September 2011
Chart 8 C/2009 P1 (Garradd) period 7 September - 17 September 2011
Chart 9 C/2009 P1 (Garradd) period 17 September - 1 October 2011
Chart 10 C/2009 P1 (Garradd) period 1 October - 4 November 2011
Chart 11 C/2009 P1 (Garradd) period 22 November - 28 December 2011
Chart 12 C/2009 P1 (Garradd) period 28 December 2011- 17 January 2012
Chart 13 C/2009 P1 (Garradd) period 17 January - 30 January 2012
Chart 14 C/2009 P1 (Garradd) period 30 January - 12 February 2012
Chart 15 C/2009 P1 (Garradd) period 12 February - 22 February 2012
Chart 16 C/2009 P1 (Garradd) period 22 February - 3 March 2012
29P/Schwassmann-Wachmann 1
FndChart 29P/Schwassmann-Wachmann 1 period 4 December 2011 - 5 August 2012
Chart 1 29P/Schwassmann-Wachmann 1 period 4 December - 20 December 2011
Chart 2 29P/Schwassmann-Wachmann 1 period 20 December 2011 - 11 January 2012
Chart 3 29P/Schwassmann-Wachmann 1 period 11 January - 24 February 2012
Chart 4 29P/Schwassmann-Wachmann 1 period 24 February - 12 March 2012
Chart 5 29P/Schwassmann-Wachmann 1 period 12 March - 27 March 2012
Chart 6 29P/Schwassmann-Wachmann 1 period 27 March - 10 April 2012
Chart 7 29P/Schwassmann-Wachmann 1 period 10 April - 27 April 2012
Chart 8 29P/Schwassmann-Wachmann 1 period 27 April - 29 May 2012
Chart 9 29P/Schwassmann-Wachmann 1 period 21 May - 5 July 2012
Chart 10 29P/Schwassmann-Wachmann 1 period 5 July - 21 July 2012
Chart 11 29P/Schwassmann-Wachmann 1 period 21 July - 3 August 2012