Comets - 162P/Siding Spring - 0162P
Type Periodic Perihelion Date 11 July 2015 Perihelion Distance (q) 1.2 Aphelion Distance (Q) 4.9 Period (Years)   5.3 Eccentricity (e)   0.60 Inclination (i)   27.8 Click for NASA orbit diagram
Hills Observatory: 1 January 2013 to 14 August 2018
COMETS COMETS
DEEP SKY DEEP SKY
The Near Earth Object 2004 TU12 was discovered on 2004 October 10 by the Siding Spring Survey (Australia), announced on MPEC 2004-T55 and classified as an amor object. On 2004 November 12, J. Lacruz at the La CaƱada Observatory noticed a faint trace to the north-east originating at the neo and thought it could be a comet. Stacking many images the trace was visible as a straight tail moving as a whole with the nucleus. The object was reclassified as 162P/Siding Spring, but debate continues concerning the nature of the tail. Computer models suggest that the tail cannot be ionised gas and the dust has physical and dynamical properties unlike other comet dust tails. Date 10x10 mag Error Kphot mag Coma ' 18-Aug-15 16.96 0.04 15.3 0.2 27-Aug-15 16.58 0.02 16.3 0.2 14-Sep-15 17.20 0.05 16.7 0.2 27-Sep-15 17.62 0.31 17.3 0.2 21-Oct-15 17.92 0.26 16.5 0.2 08-Nov-15 17.05 0.04 17.0 0.2 17-Nov-15 17.08 0.03 16.4 0.2 09-Dec-15 17.08 0.01 17.0 0.2 18-Dec-15 17.63 0.02 17.5 0.2 04-Feb-16   17.73 0.02 17.6 0.2 11-Feb-16 18.03 0.03 17.9 0.2 28-Feb-16 17.65 0.05 17.2 0.2 28-Mar-16 18.71 0.11 18.4 0.2 12-Apr-16 18.33 0.11 18.1 0.2 02-May-16 19.02 0.29 18.9 0.2
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