[BAA Comets] DM001 EPHEMERIS

[Shanklin, Jonathan D.]

The orbit is still rather fluid, but the ephemeris from Nakano on the CBET is probably no longer valid.

This ephemeris uses the latest PCCP orbit:

Ephemeris for   DM001     DM001

Omega= 80.0525 OMEGA=125.3290 i=149.1079 q= 0.429752 a= 51.051556
e=0.991582  P=  364.765  T= 2018 December   2.9708    Equinox= 2000
Magnitudes calculated from m=10.9+5.0*Log(d)+15.0*Log(r)+0.000*Beta

Station: Cambridge
Latitude:  52.213  Longitude:    0.000   Magnetic variation:   0.0
Observing constraints:   Sun below -13. deg  Object above***** deg

November  2018                 Positions for 00:00 ET, Times in UT
                                                                                       Elong  Moon  Comet
Day     R.A. B1950 Dec   R.A. J2000 Dec   Mag    D      R    Trans    Observable    Sun Moon Phase Tail  pA d RA dDec

  9/10  12 25.1   -2.02  12 27.6   -2.18   8.8   1.08   0.71   9.12   4.42 to  5.47   40   69    5   19  294    0    0
10/11  12 30.4   -1.54  12 32.9   -2.10   8.6   1.04   0.69   9.14   4.38 to  5.48   40   80   11   22  295   32    3
11/12  12 36.1   -1.46  12 38.7   -2.03   8.4   1.00   0.68   9.15   4.35 to  5.50   40   91   18   26  295   35    3
12/13  12 42.4   -1.38  12 44.9   -1.55   8.1   0.97   0.66   9.18   4.32 to  5.51   39  102   26   30  296   39    3
13/14  12 49.2   -1.31  12 51.8   -1.47   7.8   0.93   0.64   9.21   4.31 to  5.53   39  112   35   35  297   42    3
14/15  12 56.7   -1.23  12 59.3   -1.39   7.6   0.90   0.62   9.24   4.30 to  5.54   38  122   44   41  298   46    3

It will almost certainly change further as more observations come in and the observational arc is extended.

Regards,

Jon Shanklin
Visual Co-ordinator, BAA Comet Section
http://www.ast.cam.ac.uk/~jds/


From: Comets-disc <comets-disc-bounces at lists.britastro.org> On Behalf Of denis buczynski
Sent: 09 November 2018 13:40
To: BAA Comets Discussion List <comets-disc at lists.britastro.org>
Subject: [BAA Comets] DM001 EPHEMERIS


On CBET 4569
  Nakano provides the following preliminary ephemeris for the comet:



   2018 TT    R.A. (2000) Decl.    Delta     r

   Nov.  5    12 06.22  -02 26.5   1.549   1.013

         6    12 10.91  -02 21.2   1.549   1.012

         7    12 15.60  -02 15.7   1.550   1.011

         8    12 20.29  -02 10.2   1.550   1.011

         9    12 24.97  -02 04.6   1.551   1.012

        10    12 29.64  -01 59.0   1.552   1.012

        11    12 34.30  -01 53.3   1.553   1.013

        12    12 38.95  -01 47.6   1.555   1.014

        13    12 43.59  -01 41.8   1.556   1.015

        14    12 48.22  -01 36.0   1.558   1.017

        15    12 52.84  -01 30.2   1.560   1.019

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