* * * * * COMET CHARTS * * * * *

The aim of this service is to provide charts (using Guide 9.0) 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 APASS with ICQ code AQ, 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/2013 A1 (Siding Spring)
C/2013 V5 (Oukaïmeden)
C/2014 E2 (Jacques)

see below...

C/2013 A1 (Siding Spring)

Chart 1C/2013 A1 (Siding Spring) period 16 August - 20 August 2014

Chart 2 C/2013 A1 (Siding Spring) period 20 August - 24 August 2014

Chart 3 C/2013 A1 (Siding Spring) period 24 August - 28 August 2014

Chart 4 C/2013 A1 (Siding Spring) period 28 August - 1 September 2014

C/2013 V5 (Oukaïmeden)

Chart 1C/2013 C/2013 V5 (Oukaïmeden) period 19 August - 24 August 2014

Chart 2 C/2013 C/2013 V5 (Oukaïmeden) period 24 August - 30 August 2014



C/2014 E2 (Jacques)

Chart 1 C/2014 E2 (Jacques) period 17 April - 21 April 2014

Chart 2 C/2014 E2 (Jacques) period 21 April - 26 April 2014

Chart 3 C/2014 E2 (Jacques) period 26 April - 2 May 2014

Chart 4 C/2014 E2 (Jacques) period 2 May - 11 May 2014

Chart 5 C/2014 E2 (Jacques) period 11 May - 23 May 2014

Chart 6 C/2014 E2 (Jacques) period 23 May - 7 June 2014

Chart 7 C/2014 E2 (Jacques) period 16 July - 30 July 2014

Chart 8 C/2014 E2 (Jacques) period 30 July - 8 August 2014

Chart 9 C/2014 E2 (Jacques) period 8 August - 14 August 2014

Chart 10 C/2014 E2 (Jacques) period 14 August - 19 August 2014

Chart 11 C/2014 E2 (Jacques) period 19 August - 24 August 2014

Chart 12 C/2014 E2 (Jacques) period 24 August - 28 August 2014

Chart 13 C/2014 E2 (Jacques) period 28 August - 2 September 2014