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C/2012 S1 (ISON)  -  15 nov. 2013

Astrometric data for minor planet center


COD B96

CON BRIXIIS Observatory, Eyckensbeekstraat 2, Kruibeke, Belgium

OBS E.Bryssinck

MEA E.Bryssinck

TEL 0.4-m f/3.8 astrograph + CCD

MPCReport file updated 2013.11.15 16:36:04

AC2

NET CMC-14


    CK12S010  C2013 11 15.20678 12 54 38.20 -07 06 28.6           8.3 N      B96

    CK12S010  C2013 11 15.20715 12 54 38.47 -07 06 32.2           8.3 N      B96

    CK12S010  C2013 11 15.20752 12 54 38.73 -07 06 33.5           8.4 N      B96

    CK12S010  C2013 11 15.20825 12 54 39.12 -07 06 35.8           8.4 N      B96

    CK12S010  C2013 11 15.20899 12 54 39.61 -07 06 41.5           8.4 N      B96

    CK12S010  C2013 11 15.20936 12 54 39.81 -07 06 42.2           8.3 N      B96

    CK12S010  C2013 11 15.21010 12 54 40.34 -07 06 45.7           8.3 N      B96

    CK12S010  C2013 11 15.21175 12 54 41.49 -07 06 52.4           9.4 N      B96

----- end -----







Photometric data from FOCAS-II


COD I89

CON RAS Observatory, Nerpio, Spain

CATALOG: USNO A2.0 / CMC-14 - BAND: R


                                   10x10  20x20  30x30  40x40  50x50  60x60   SNR   SB   COD

COMET         UTC                    +/-    +/-    +/-    +/-    +/-    +/-     N  FWHM  CAT

------------  -------------------  -----  -----  -----  -----  -----  -----  ----  ----  ---

C/2012 S1     15/11/2013 05:00:13   8.45   7.32   6.81   6.50   6.28   6.11  11.6  15.0  B96

C/2012 S1     15/11/2013 05:00:13*  0.07   0.03   0.02   0.02   0.02   0.02    12   7.6  CMC


                                                                     AFRHO         LOG

COMET         UTC                   DELTA    r    BOX "   MAG   RSR    CM    +/-  AFRHO  OBS

------------  -------------------   -----  -----  -----  -----  ---  -----  ----  -----  ---

C/2012 S1     15/11/2013 05:00:13    0.90   0.61  30.48   6.89   12   5204   449  3.716  B96


7

Afp data obtained by the application of the  CARA approuch

Af(rho) data available via request to CARA-coordinator


http://cara.uai.it

Comet C/2012 S (ISON) → major outburst !! Development kind of coma wings in the coma !  Possible bow shock, that is what happens when the solar wind collides with obstacles such as comets.  Hugh increase of the Af(rho) parameter to about 4000 cm ! (Some days ago was this about 300 cm.  The increase of the Af(rho) parameter was started on nov. 13.2 UT. Note: see also the shape of the Afrho-versus rho differences for R-filter and I-filter. The I-filter discard the C2 and most of the NH2 contamination, but the CCD camera is more sensitive for IR, so hard to say…

With R-Bessel filter

With I-Bessel filter

Image in 2x2 binning