* * * * * 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.

If you wish to be informed about the issue of new charts you can subscribe to our charts-info service.
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Currently we have charts available for:

 

C/2013 X1 (PANSTARRS)
C/2014 S2 (PANSTARRS)
252P/LINEAR



see below...

C/2013 X1 (PANSTARRS)

Chart 5 C/2013 X1 (PANSTARRS) period 13 April - 4 May 2016

Chart 6 C/2013 X1 (PANSTARRS) period 4 May - 24 May 2016

 

C/2014 S2 (PANSTARRS)

Chart 1 C/2014 S2 (PANSTARRS) period 30 October - 5 Nobember 2015

Chart 2 C/2014 S2 (PANSTARRS) period 5 Nobember - 12 November 2015

Chart 3 C/2014 S2 (PANSTARRS) period 12 Nobember - 19 November 2015

Chart 4 C/2014 S2 (PANSTARRS) period 19 Nobember - 28 November 2015

Chart 5 C/2014 S2 (PANSTARRS) period 28 November - 12 December 2015

Chart 6 C/2014 S2 (PANSTARRS) period 12 December 2015 - 20 January 2016

Chart 7 C/2014 S2 (PANSTARRS) period 20 January - 4 February 2016

Chart 8 C/2014 S2 (PANSTARRS) period 4 February - 16 February 2016

Chart 9 C/2014 S2 (PANSTARRS) period 16 February - 28 February 2016

Chart 10 C/2014 S2 (PANSTARRS) period 28 February - 6 March 2016

Chart 11 C/2014 S2 (PANSTARRS) period 6 March - 13 March 2016

Chart 12 C/2014 S2 (PANSTARRS) period 13 March - 20 March 2016

Chart 13 C/2014 S2 (PANSTARRS) period 20 March - 28 March 2016

Chart 14 C/2014 S2 (PANSTARRS) period 28 March - 3 April 2016

Chart 15 C/2014 S2 (PANSTARRS) period 3 April - 9 April 2016

Chart 16 C/2014 S2 (PANSTARRS) period 9 April - 15 April 2016

Chart 17 C/2014 S2 (PANSTARRS) period 15 April - 21 April 2016

 

252P/LINEAR

Chart 1 252P/LINEAR period 2 April - 11 April 2016

Chart 2 252P/LINEAR period 11 April - 22 April 2016

Chart 3 252P/LINEAR period 22 April - 12 May 2016