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<div>Thanks Jon. The field of view of the FT 2m telescopes is quite small - 10.5 x 10.5 arcmin. So it sounds like it would be good to resubmit after a couple of days. The FT have access to 2 2m scopes, one in Hawaii and one in Siding Springs, so the comet will be much better positioned that from here! It might also be worth utilising their small scopes (1m or 0.4m) to get a bigger FOV and so a greater margin for divergence.</div><div><br></div><div>Helen</div><div><br></div>
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On Friday, 9 November 2018, 14:21:26 GMT, Shanklin, Jonathan D. <jdsh@bas.ac.uk> wrote:
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<p class="ydpa7adea12yiv9330807525MsoNormal"><span style="font-size:11.0pt;">Although the designation is likely to be 2018 V1, this is not guaranteed, hence the use of DM001 as a preliminary designation.</span></p>
<p class="ydpa7adea12yiv9330807525MsoNormal"><span style="font-size:11.0pt;"> </span></p>
<p class="ydpa7adea12yiv9330807525MsoNormal"><span style="font-size:11.0pt;">I’m not sure what the field of view of the Faulkes Telescope is, but the Nakano ephemeris and that based on the latest observations
diverge by at least 6 minutes by November 15. You should be OK for a couple of days, but it might then be worth a resubmission. Also the comet will be quite low – I think around 20 degrees altitude at the start of twilight.</span></p>
<p class="ydpa7adea12yiv9330807525MsoNormal"><span style="font-size:11.0pt;"> </span></p>
<p class="ydpa7adea12yiv9330807525MsoNormal"><span style="font-size:11.0pt;">Regards,</span></p>
<p class="ydpa7adea12yiv9330807525MsoNormal"><span style="font-size:11.0pt;"> </span></p>
<p class="ydpa7adea12yiv9330807525MsoNormal"><span style="font-size:11.0pt;">Jon Shanklin</span></p>
<p class="ydpa7adea12yiv9330807525MsoNormal"><span style="font-size:11.0pt;">Visual Co-ordinator, BAA Comet Section</span></p>
<p class="ydpa7adea12yiv9330807525MsoNormal"><span style="font-size:11.0pt;">http://www.ast.cam.ac.uk/~jds/</span></p>
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<p class="ydpa7adea12yiv9330807525MsoNormal"><b><span lang="EN-US" style="font-size:11.0pt;">From:</span></b><span lang="EN-US" style="font-size:11.0pt;"> Comets-disc <comets-disc-bounces@lists.britastro.org>
<b>On Behalf Of </b>Helen Usher<br clear="none">
<b>Sent:</b> 09 November 2018 14:03<br clear="none">
<b>To:</b> denis buczynski <buczynski8166@btinternet.com>; BAA Comets discussion list <comets-disc@lists.britastro.org><br clear="none">
<b>Subject:</b> Re: [BAA Comets] DM001 EPHEMERIS</span></p>
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<p class="ydpa7adea12yiv9330807525MsoNormal"><span>Hi Jon,</span></p>
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<p class="ydpa7adea12yiv9330807525MsoNormal"><span> </span></p>
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<p class="ydpa7adea12yiv9330807525MsoNormal"><span>Thanks for this. I've just submitted an observation run request to the Faulkes Telescope and have used their MPC lookup using the designation 2018 V1. I've asked for one image a day for 6
days. Do you think the elements will be robust enough to last 6 days, or should I resubmit each day in case the elements get refined?</span></p>
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<p class="ydpa7adea12yiv9330807525MsoNormal"><span> </span></p>
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<p class="ydpa7adea12yiv9330807525MsoNormal"><span>Thanks</span></p>
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<p class="ydpa7adea12yiv9330807525MsoNormal"><span>Helen</span></p>
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<p class="ydpa7adea12yiv9330807525MsoNormal"><span> </span></p>
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<p class="ydpa7adea12yiv9330807525MsoNormal"><span style="font-size:10.0pt;">On Friday, 9 November 2018, 13:57:57 GMT, Shanklin, Jonathan D. <<a shape="rect" href="mailto:jdsh@bas.ac.uk" rel="nofollow" target="_blank">jdsh@bas.ac.uk</a>> wrote:
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<p class="ydpa7adea12yiv9330807525ydpa878fed4yiv9399587404msonormal"><span style="font-size:11.0pt;">The orbit is still rather fluid, but the ephemeris from Nakano on the CBET is probably no longer valid.</span><span style="font-size:10.0pt;"></span></p>
<p class="ydpa7adea12yiv9330807525ydpa878fed4yiv9399587404msonormal"><span style="font-size:11.0pt;"> </span><span style="font-size:10.0pt;"></span></p>
<p class="ydpa7adea12yiv9330807525ydpa878fed4yiv9399587404msonormal"><span style="font-size:11.0pt;">This ephemeris uses the latest PCCP orbit:</span><span style="font-size:10.0pt;"></span></p>
<p class="ydpa7adea12yiv9330807525ydpa878fed4yiv9399587404msonormal"><span style="font-size:11.0pt;"> </span><span style="font-size:10.0pt;"></span></p>
<p class="ydpa7adea12yiv9330807525ydpa878fed4yiv9399587404msonormal"><span style="font-size:11.0pt;">Ephemeris for DM001 DM001</span><span style="font-size:10.0pt;"></span></p>
<p class="ydpa7adea12yiv9330807525ydpa878fed4yiv9399587404msonormal"><span style="font-size:11.0pt;"> </span><span style="font-size:10.0pt;"></span></p>
<p class="ydpa7adea12yiv9330807525ydpa878fed4yiv9399587404msonormal"><span style="font-size:11.0pt;">Omega= 80.0525 OMEGA=125.3290 i=149.1079 q= 0.429752 a= 51.051556</span><span style="font-size:10.0pt;"></span></p>
<p class="ydpa7adea12yiv9330807525ydpa878fed4yiv9399587404msonormal"><span style="font-size:11.0pt;">e=0.991582 P= 364.765 T= 2018 December 2.9708 Equinox= 2000</span><span style="font-size:10.0pt;"></span></p>
<p class="ydpa7adea12yiv9330807525ydpa878fed4yiv9399587404msonormal"><span style="font-size:11.0pt;">Magnitudes calculated from m=10.9+5.0*Log(d)+15.0*Log(r)+0.000*Beta</span><span style="font-size:10.0pt;"></span></p>
<p class="ydpa7adea12yiv9330807525ydpa878fed4yiv9399587404msonormal"><span style="font-size:11.0pt;"> </span><span style="font-size:10.0pt;"></span></p>
<p class="ydpa7adea12yiv9330807525ydpa878fed4yiv9399587404msonormal"><span style="font-size:11.0pt;">Station: Cambridge</span><span style="font-size:10.0pt;"></span></p>
<p class="ydpa7adea12yiv9330807525ydpa878fed4yiv9399587404msonormal"><span style="font-size:11.0pt;">Latitude: 52.213 Longitude: 0.000 Magnetic variation: 0.0</span><span style="font-size:10.0pt;"></span></p>
<p class="ydpa7adea12yiv9330807525ydpa878fed4yiv9399587404msonormal"><span style="font-size:11.0pt;">Observing constraints: Sun below -13. deg Object above***** deg</span><span style="font-size:10.0pt;"></span></p>
<p class="ydpa7adea12yiv9330807525ydpa878fed4yiv9399587404msonormal"><span style="font-size:11.0pt;"> </span><span style="font-size:10.0pt;"></span></p>
<p class="ydpa7adea12yiv9330807525ydpa878fed4yiv9399587404msonormal"><span style="font-size:11.0pt;">November 2018 Positions for 00:00 ET, Times in UT</span><span style="font-size:10.0pt;"></span></p>
<p class="ydpa7adea12yiv9330807525ydpa878fed4yiv9399587404msonormal"><span style="font-size:11.0pt;"> Elong Moon Comet</span><span style="font-size:10.0pt;"></span></p>
<p class="ydpa7adea12yiv9330807525ydpa878fed4yiv9399587404msonormal"><span style="font-size:11.0pt;">Day R.A. B1950 Dec R.A. J2000 Dec Mag D R Trans Observable Sun Moon Phase Tail pA d RA dDec</span><span style="font-size:10.0pt;"></span></p>
<p class="ydpa7adea12yiv9330807525ydpa878fed4yiv9399587404msonormal"><span style="font-size:11.0pt;"> </span><span style="font-size:10.0pt;"></span></p>
<p class="ydpa7adea12yiv9330807525ydpa878fed4yiv9399587404msonormal"><span style="font-size:11.0pt;"> 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</span><span style="font-size:10.0pt;"></span></p>
<p class="ydpa7adea12yiv9330807525ydpa878fed4yiv9399587404msonormal"><span style="font-size:11.0pt;">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</span><span style="font-size:10.0pt;"></span></p>
<p class="ydpa7adea12yiv9330807525ydpa878fed4yiv9399587404msonormal"><span style="font-size:11.0pt;">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</span><span style="font-size:10.0pt;"></span></p>
<p class="ydpa7adea12yiv9330807525ydpa878fed4yiv9399587404msonormal"><span style="font-size:11.0pt;">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</span><span style="font-size:10.0pt;"></span></p>
<p class="ydpa7adea12yiv9330807525ydpa878fed4yiv9399587404msonormal"><span style="font-size:11.0pt;">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</span><span style="font-size:10.0pt;"></span></p>
<p class="ydpa7adea12yiv9330807525ydpa878fed4yiv9399587404msonormal"><span style="font-size:11.0pt;">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</span><span style="font-size:10.0pt;"></span></p>
<p class="ydpa7adea12yiv9330807525ydpa878fed4yiv9399587404msonormal"><span style="font-size:11.0pt;"> </span><span style="font-size:10.0pt;"></span></p>
<p class="ydpa7adea12yiv9330807525ydpa878fed4yiv9399587404msonormal"><span style="font-size:11.0pt;">It will almost certainly change further as more observations come in and the observational arc is extended.</span><span style="font-size:10.0pt;"></span></p>
<p class="ydpa7adea12yiv9330807525ydpa878fed4yiv9399587404msonormal"><span style="font-size:11.0pt;"> </span><span style="font-size:10.0pt;"></span></p>
<p class="ydpa7adea12yiv9330807525ydpa878fed4yiv9399587404msonormal"><span style="font-size:11.0pt;">Regards,</span><span style="font-size:10.0pt;"></span></p>
<p class="ydpa7adea12yiv9330807525ydpa878fed4yiv9399587404msonormal"><span style="font-size:11.0pt;"> </span><span style="font-size:10.0pt;"></span></p>
<p class="ydpa7adea12yiv9330807525ydpa878fed4yiv9399587404msonormal"><span style="font-size:11.0pt;">Jon Shanklin</span><span style="font-size:10.0pt;"></span></p>
<p class="ydpa7adea12yiv9330807525ydpa878fed4yiv9399587404msonormal"><span style="font-size:11.0pt;">Visual Co-ordinator, BAA Comet Section</span><span style="font-size:10.0pt;"></span></p>
<p class="ydpa7adea12yiv9330807525ydpa878fed4yiv9399587404msonormal"><span style="font-size:11.0pt;"><a shape="rect" href="http://www.ast.cam.ac.uk/~jds/" rel="nofollow" target="_blank">http://www.ast.cam.ac.uk/~jds/</a></span><span style="font-size:10.0pt;"></span></p>
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<p class="ydpa7adea12yiv9330807525ydpa878fed4yiv9399587404msonormal"><b><span lang="EN-US" style="font-size:11.0pt;">From:</span></b><span lang="EN-US" style="font-size:11.0pt;"> Comets-disc <<a shape="rect" href="mailto:comets-disc-bounces@lists.britastro.org" rel="nofollow" target="_blank">comets-disc-bounces@lists.britastro.org</a>>
<b>On Behalf Of </b>denis buczynski<br clear="none">
<b>Sent:</b> 09 November 2018 13:40<br clear="none">
<b>To:</b> BAA Comets Discussion List <<a shape="rect" href="mailto:comets-disc@lists.britastro.org" rel="nofollow" target="_blank">comets-disc@lists.britastro.org</a>><br clear="none">
<b>Subject:</b> [BAA Comets] DM001 EPHEMERIS</span><span style="font-size:10.0pt;"></span></p>
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<pre><span style="color:#26282A;">On CBET 4569 <br clear="none"> Nakano provides the following preliminary ephemeris for the comet:</span></pre>
<pre><span style="color:#26282A;"> </span></pre>
<pre><span style="color:#26282A;"> 2018 TT R.A. (2000) Decl. Delta r</span></pre>
<pre><span style="color:#26282A;"> Nov. 5 12 06.22 -02 26.5 1.549 1.013</span></pre>
<pre><span style="color:#26282A;"> 6 12 10.91 -02 21.2 1.549 1.012</span></pre>
<pre><span style="color:#26282A;"> 7 12 15.60 -02 15.7 1.550 1.011</span></pre>
<pre><span style="color:#26282A;"> 8 12 20.29 -02 10.2 1.550 1.011</span></pre>
<pre><span style="color:#26282A;"> 9 12 24.97 -02 04.6 1.551 1.012</span></pre>
<pre><span style="color:#26282A;"> 10 12 29.64 -01 59.0 1.552 1.012</span></pre>
<pre><span style="color:#26282A;"> 11 12 34.30 -01 53.3 1.553 1.013</span></pre>
<pre><span style="color:#26282A;"> 12 12 38.95 -01 47.6 1.555 1.014</span></pre>
<pre><span style="color:#26282A;"> 13 12 43.59 -01 41.8 1.556 1.015</span></pre>
<pre><span style="color:#26282A;"> 14 12 48.22 -01 36.0 1.558 1.017</span></pre>
<pre><span style="color:#26282A;"> 15 12 52.84 -01 30.2 1.560 1.019</span></pre>
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