Station data: (349) Ageo (N35.956470 E139.566220) Japan. Observer K. Kadota. 0.25-m f/5.0 reflector + CCD. (367) Yatsuka (N35.499977 E133.167000) Japan. (500) Geocentric. (585) Kyiv comet station (N50.297989 E30.524620) Ukraine. (703) Catalina Sky Survey (N32.417006 W110.732640) US/Arizona. Observers B. M. Africano, E. J. Christensen, D. C. Fuls, A. R. Gibbs, A. D. Grauer, H. Groeller, J. A. Johnson, R. A. Kowalski, S. M. Larson, G. J. Leonard, R. L. Seaman, F. C. Shelly. 0.68 m Schmidt + 10K CCD. (C42) Xingming Observatory, Mt. Nanshan (N43.471021 E87.177800) China. Observers H. Tan, X. Gao, P. Sun. Measurers Z. Xu, P. Sun, M.-T. Hui. 0.5-m f/4 reflector + CCD. (G40) Slooh.com Canary Islands Observatory (N28.299720 W16.508260) Canary Islands (Spain). Observers G. Gašparovic, Y. Chen. 0.43-m f/6.8 Corrected Dall-Kirkham + CCD. (H06) RAS Observatory, Mayhill (N32.903325 W105.528700) US/New Mexico. Observers E. Guido, G. Sostero, V. Gonano, L. Donato. (I81) Tarbatness Observatory, Portmahomack (N57.844125 W3.798890) UK. (J95) Great Shefford (N51.474969 W1.447003) UK. Observer P. Birtwhistle. 0.40-m f/6.0 Schmidt-Cassegrain + CCD. (K68) Osservatorio Elianto, Pontecagnano (N40.657713 E14.905120) Italy. (L28) ISON-Castelgrande Observatory (N40.817569 E15.463390) Italy. (N55) Corona Borealis Observatory, Ngari (N32.326059 E80.026230) China. (U69) iTelescope SRO Observatory, Auberry (N37.070390 W119.413000) US/California. 0.61-m f/6.5 astrograph + CCD. (W96) CAO, San Pedro de Atacama (since 2013) (S22.953491 W68.179940) Chile. Orbital elements: DM001 Perihelion 2018 Dec 3.417150 +/- 0.0667 TT = 10:00:41 (JD 2458455.917150) Epoch 2018 Nov 11.0 TT = JDT 2458433.5 Earth MOID: 0.1104 Ve: 0.0065 q 0.38687286 +/- 0.000428 (J2000 ecliptic) H 10.7 G 0.15 Peri. 88.58832 +/- 0.19 Node 128.93386 +/- 0.09 e 1.0127104 +/- 0.00734 Incl. 143.88715 +/- 0.028 From 292 observations 2018 Nov. 8-11; mean residual 4".84 Residuals in arcseconds: 181108 H06 1.0+ 1.3- 181109 367 .31+ .29- 181110 L28 .26+ .20+ 181108 H06 5.8+ .14- 181109 367 .01- .06- 181110 L28 .41+ .01+ 181108 H06 5.4+ .70+ 181109 C42 .51+ .64- 181110 L28 .42+ .12+ 181108 H06 5.7+ .36+ 181109 C42 .32- .01- 181110 L28 .32+ .14+ 181108 H06 .96+ .93- 181109 C42 .36- .10+ 181110 L28 .47+ .25+ 181108 H06 .46+ 1.1- 181109 C42 .20- .08- 181110 L28 .47+ .16+ 181108 H06 .54+ .27- 181109 C42 .10+ .00 181110 L28 .33+ .27+ 181108 H06 .36+ .04- 181109 C42 .21- .11- 181110 L28 .48+ .08+ 181108 H06 .42+ .21- 181109 C42 .16- .03- 181110 L28 .63+ .29+ 181108 H06 .20+ .17- 181109 C42 .48- .22- 181110 L28 .33+ .11+ 181108 703 3.7- .88+ 181109 C42 .21- .08- 181110 L28 .38+ .02+ 181108 H06 .90+ .54+ 181109 C42 .44- .04- 181110 L28 .54+ .13+ 181108 H06 .18+ .17+ 181109 C42 .24- .16- 181110 L28 .35+ .15+ 181108 H06 .29+ .14+ 181109 C42 .42- .12- 181110 L28 .25+ .17+ 181108 H06 .94+ .24- 181109 C42 .30- .18- 181110 L28 .25+ .08+ 181108 703 3.9- .16- 181109 C42 .41- .10- 181110 L28 .40+ .29+ 181108 H06 .42+ .10- 181109 C42 .34- .16- 181110 L28 .25+ .30+ 181108 H06 .50+ .11- 181109 C42 .37- .12- 181110 L28 .40+ .31+ 181108 H06 .91+ .04- 181109 C42 .12- .05- 181110 L28 .55+ .02+ 181108 H06 1.1+ .12- 181109 C42 .40- .11- 181110 L28 .40+ .34+ 181108 H06 .64+ .12+ 181109 C42 .13- .07- 181110 L28 .45+ .15+ 181108 H06 .67+ .28+ 181109 C42 .19- .49- 181110 L28 .45+ .04- 181108 703 4.3- .13- 181109 C42 .22- .24- 181110 L28 .45+ .18+ 181108 H06 .41+ .16- 181109 C42 .29- .30- 181110 L28 .30+ .19+ 181108 500 105+ 48.2+ 181109 C42 .39- .18- 181110 L28 .15+ .10- 181108 N55 .57+ .35+ 181109 C42 .32- .04- 181110 L28 .30+ .29- 181108 N55 .65+ .43+ 181109 C42 .30- .09- 181110 L28 .00 .12+ 181108 N55 .23+ .12+ 181109 C42 .21- .12- 181110 J95 .13+ .17+ 181109 N55 .46+ .00 181109 C42 .14- .02+ 181110 J95 .23- .12+ 181109 N55 .93+ .22- 181109 C42 .42- .24- 181110 J95 .39- .37+ 181109 N55 .25+ .28+ 181109 C42 .28- .25- 181110 J95 .02+ .26+ 181109 N55 .31+ .43- 181109 C42 .36- .11- 181110 W96 1.7- .54- 181109 L28 1.5- 1.1+ 181109 C42 .54- .27- 181110 W96 .58- 1.4- 181109 L28 .84- .54+ 181109 C42 .31- .28- 181110 W96 .65- .98- 181109 L28 .53- 1.1+ 181109 C42 .44- .33- 181110 W96 .47- .57- 181109 L28 .40- .85+ 181109 C42 .27- .20- 181110 U69 .16+ .37- 181109 L28 .39- .68+ 181109 C42 .18- .12- 181110 U69 .08- .18+ 181109 L28 .48- .42+ 181109 C42 .28- .15- 181110 U69 .48+ .32+ 181109 L28 .33- .43+ 181110 L28 1.1- 1.7+ 181110 U69 .66- .04+ 181109 L28 .29- .58+ 181110 L28 .79- 1.3+ 181110 U69 .40- .38- 181109 L28 .14- .72+ 181110 L28 .78- 1.2+ 181111 L28 .18- .10+ 181109 L28 .39- .66+ 181110 L28 .62- .27+ 181111 L28 .40- .36- 181109 L28 .11- .59+ 181110 L28 .16- .58+ 181111 L28 .10- .10- 181109 L28 .41- 1.0+ 181110 L28 1.3- 1.2+ 181111 L28 .17- .06- 181109 L28 .08+ .68+ 181110 L28 .08- .12+ 181111 L28 .14+ .30- 181109 L28 .12+ .92+ 181110 L28 .97- 1.4+ 181111 L28 .14+ .17- 181109 L28 .01+ .46+ 181110 L28 .81- 1.4+ 181111 L28 .37+ .57- 181109 K68 .78+ .55- 181110 L28 1.1- 1.2+ 181111 L28 .35- .14- 181109 L28 .21+ .61+ 181110 L28 .11+ .03- 181111 L28 .50+ .15+ 181109 L28 .10- .45+ 181110 L28 .43- .69+ 181111 L28 .17- .28+ 181109 L28 .05- .69+ 181110 L28 .24- .33+ 181111 L28 .09- .22+ 181109 L28 .16- .53+ 181110 L28 .42+ .05+ 181111 L28 .13+ .15- 181109 L28 .18+ .48+ 181110 L28 .62- .66+ 181111 L28 .21+ .12- 181109 L28 .42- .12+ 181110 L28 .01- .07+ 181111 L28 .02- .32+ 181109 L28 .38- .26+ 181110 585 .02- .90+ 181111 L28 .21+ .35+ 181109 L28 .19- .21+ 181110 585 .25+ .32- 181111 L28 .17- .18+ 181109 L28 .15- .25+ 181110 L28 .01- .78+ 181111 L28 .21+ .01+ 181109 L28 .11- .20+ 181110 585 .44- .30+ 181111 L28 .28+ .05- 181109 L28 .07- .04+ 181110 585 .08- .07- 181111 L28 .20+ .32- 181109 K68 .47+ .20+ 181110 585 .02- .24- 181111 L28 .28+ .19- 181109 L28 .03- .53+ 181110 L28 .60- .70+ 181111 L28 .20+ .06- 181109 L28 .01+ .37+ 181110 L28 .74- .21+ 181111 L28 .08- .13- 181109 L28 .05+ .11+ 181110 L28 .52+ .53+ 181111 L28 .00 .00 181109 L28 .09+ .46+ 181110 L28 .07+ .24+ 181111 L28 .31+ .18- 181109 L28 .07- .40+ 181110 L28 .08+ .35+ 181111 L28 .54+ .15+ 181109 L28 .18- .14+ 181110 585 .16- .14- 181111 L28 .16+ .22- 181109 L28 .01+ .38+ 181110 L28 .39+ .96+ 181111 L28 .23+ .19- 181109 K68 .14- .14- 181110 585 .34+ .71- 181111 L28 .25+ .06- 181109 G40 .76+ .60+ 181110 585 .35- .01+ 181111 L28 .13- .07+ 181109 G40 .47+ .35+ 181110 585 .14- .36- 181111 L28 .05- .19- 181109 G40 .85- .23- 181110 L28 .21- .17+ 181111 L28 .17+ .06- 181109 G40 .70- .30- 181110 585 .37- .36- 181111 L28 .06- .13- 181109 G40 .09- 1.3+ 181110 585 .11- .20- 181111 L28 .16+ .00 181109 G40 1.8+ .12- 181110 L28 .20- .39+ 181111 L28 .38+ .06- 181109 G40 .28- .30+ 181110 585 .35- .68- 181111 L28 .16+ .23- 181109 G40 .53+ .35- 181110 585 .44- .15- 181111 L28 .08+ .10- 181109 G40 .13+ .40- 181110 L28 .49- .50+ 181111 L28 .45+ .07- 181109 G40 2.3+ .06- 181110 585 .02- .27- 181111 L28 .07+ .43- 181109 G40 .01- .14+ 181110 L28 .31+ .62+ 181111 L28 .33+ .23- 181109 G40 .92+ .14- 181110 585 .41- .14- 181111 L28 .40+ .19- 181109 G40 .20+ .02- 181110 L28 .29+ .47+ 181111 L28 .17+ .16- 181109 G40 2.4+ .19+ 181110 L28 .15+ .28+ 181111 L28 .39+ .03- 181109 G40 .19+ .10- 181110 L28 .45+ .39+ 181111 L28 .46+ .20- 181109 G40 .08- .04- 181110 L28 .31+ .40+ 181111 L28 .53+ .06- 181109 W96 .02+ .52- 181110 L28 .24- .32+ 181111 L28 .45+ .33- 181109 W96 .69- 1.5- 181110 L28 .38- .23+ 181111 L28 .52+ .20- 181109 W96 .88+ .54- 181110 L28 .22+ .44+ 181111 L28 .29+ .17- 181109 W96 4.1+ .96- 181110 L28 .38+ .05+ 181111 L28 .36+ .43- 181109 U69 .22- .06+ 181110 L28 .09+ .27+ 181111 L28 .53+ .41- 181109 U69 .35+ .03+ 181110 L28 .36- .12- 181111 L28 .59+ .17- 181109 U69 .16- .32- 181110 L28 .40+ .29+ 181111 L28 .96+ .44- 181109 367 .35+ .12- 181110 L28 .45+ .41+ 181111 L28 .58+ .31- 181109 367 .19+ .19- 181110 L28 .45+ .22+ 181111 L28 .80+ .68- 181109 367 .12- .04+ 181110 L28 .01+ .33+ 181111 I81 .25+ .01+ 181109 349 .07+ .30- 181110 L28 .16+ .64+ 181111 I81 1.0+ .31+ 181109 349 .49+ .12+ 181110 L28 1.3+ .14- 181111 I81 .02+ .55- 181109 349 .27+ .26+ 181110 L28 .25+ .07+ 181109 367 .13- .02- 181110 L28 .04- .38+ Ephemerides for Chelmsford: Date (UTC) RA Dec delta r elong mag " sig PA ---- -- -- ------------- ----------- ------ ------ ----- --- ---- --- 2018 09 13 10 37 08.993 -05 00 50.52 2.7325 1.7766 14.6 14.7 47.0 170 2018 09 14 10 38 10.104 -04 59 17.80 2.7138 1.7601 14.8 14.7 46.5 169 2018 09 15 10 39 11.806 -04 57 46.08 2.6947 1.7436 15.1 14.6 46.0 168 2018 09 16 10 40 14.115 -04 56 15.20 2.6753 1.7270 15.5 14.6 45.4 167 2018 09 17 10 41 17.047 -04 54 45.01 2.6556 1.7104 15.8 14.6 44.9 166 2018 09 18 10 42 20.621 -04 53 15.33 2.6356 1.6937 16.2 14.6 44.4 165 2018 09 19 10 43 24.857 -04 51 46.01 2.6152 1.6770 16.6 14.5 43.9 164 2018 09 20 10 44 29.778 -04 50 16.86 2.5945 1.6602 17.0 14.5 43.4 163 2018 09 21 10 45 35.406 -04 48 47.73 2.5735 1.6434 17.5 14.5 42.8 162 2018 09 22 10 46 41.768 -04 47 18.43 2.5521 1.6265 17.9 14.5 42.3 161 2018 09 23 10 47 48.891 -04 45 48.79 2.5304 1.6095 18.4 14.4 41.7 160 2018 09 24 10 48 56.803 -04 44 18.62 2.5084 1.5925 18.9 14.4 41.2 159 2018 09 25 10 50 05.538 -04 42 47.74 2.4861 1.5754 19.4 14.4 40.6 159 2018 09 26 10 51 15.129 -04 41 15.97 2.4634 1.5583 19.9 14.4 40.0 158 2018 09 27 10 52 25.613 -04 39 43.11 2.4404 1.5411 20.4 14.3 39.4 157 2018 09 28 10 53 37.028 -04 38 08.96 2.4171 1.5238 20.9 14.3 38.7 157 2018 09 29 10 54 49.417 -04 36 33.32 2.3934 1.5065 21.5 14.3 38.1 156 2018 09 30 10 56 02.822 -04 34 55.97 2.3695 1.4891 22.0 14.2 37.4 155 2018 10 01 10 57 17.293 -04 33 16.70 2.3451 1.4717 22.6 14.2 36.7 155 2018 10 02 10 58 32.878 -04 31 35.29 2.3205 1.4542 23.1 14.2 36.0 154 2018 10 03 10 59 49.633 -04 29 51.48 2.2955 1.4366 23.7 14.1 35.2 154 2018 10 04 11 01 07.614 -04 28 05.02 2.2701 1.4190 24.3 14.1 34.5 153 2018 10 05 11 02 26.882 -04 26 15.66 2.2445 1.4012 24.8 14.1 33.7 153 2018 10 06 11 03 47.503 -04 24 23.12 2.2185 1.3835 25.4 14.1 32.8 152 2018 10 07 11 05 09.548 -04 22 27.10 2.1921 1.3656 26.0 14.0 32.0 152 2018 10 08 11 06 33.094 -04 20 27.29 2.1654 1.3477 26.6 14.0 31.1 152 2018 10 09 11 07 58.223 -04 18 23.38 2.1384 1.3297 27.1 14.0 30.2 151 2018 10 10 11 09 25.026 -04 16 15.02 2.1110 1.3117 27.7 13.9 29.2 151 2018 10 11 11 10 53.600 -04 14 01.87 2.0833 1.2936 28.3 13.9 28.3 151 2018 10 12 11 12 24.052 -04 11 43.56 2.0553 1.2754 28.8 13.8 27.3 150 2018 10 13 11 13 56.500 -04 09 19.73 2.0269 1.2571 29.4 13.8 26.3 150 2018 10 14 11 15 31.071 -04 06 49.99 1.9982 1.2388 30.0 13.8 25.2 150 2018 10 15 11 17 07.905 -04 04 13.94 1.9692 1.2204 30.5 13.7 24.1 150 2018 10 16 11 18 47.154 -04 01 31.18 1.9398 1.2019 31.1 13.7 23.1 150 2018 10 17 11 20 28.986 -03 58 41.27 1.9101 1.1833 31.6 13.6 21.9 150 2018 10 18 11 22 13.584 -03 55 43.78 1.8800 1.1647 32.2 13.6 20.8 150 2018 10 19 11 24 01.146 -03 52 38.27 1.8496 1.1460 32.7 13.6 19.7 150 2018 10 20 11 25 51.894 -03 49 24.26 1.8189 1.1273 33.3 13.5 18.5 150 2018 10 21 11 27 46.069 -03 46 01.27 1.7878 1.1084 33.8 13.5 17.3 150 2018 10 22 11 29 43.937 -03 42 28.81 1.7565 1.0895 34.3 13.4 16.1 150 2018 10 23 11 31 45.791 -03 38 46.38 1.7248 1.0705 34.8 13.4 15.0 150 2018 10 24 11 33 51.954 -03 34 53.47 1.6927 1.0515 35.3 13.3 13.8 151 2018 10 25 11 36 02.783 -03 30 49.53 1.6604 1.0324 35.8 13.3 12.6 151 2018 10 26 11 38 18.675 -03 26 34.03 1.6277 1.0132 36.2 13.2 11.4 151 2018 10 27 11 40 40.069 -03 22 06.45 1.5948 0.9939 36.7 13.2 10.2 152 2018 10 28 11 43 07.450 -03 17 26.21 1.5615 .97459 37.1 13.1 9.10 152 2018 10 29 11 45 41.362 -03 12 32.79 1.5280 .95520 37.5 13.1 7.98 153 2018 10 30 11 48 22.408 -03 07 25.64 1.4941 .93576 37.9 13.0 6.90 154 2018 10 31 11 51 11.261 -03 02 04.25 1.4600 .91626 38.2 13.0 5.86 155 2018 11 01 11 54 08.678 -02 56 28.11 1.4256 .89670 38.5 12.9 4.87 156 2018 11 02 11 57 15.503 -02 50 36.78 1.3910 .87710 38.8 12.8 3.94 157 2018 11 03 12 00 32.686 -02 44 29.87 1.3561 .85746 39.1 12.8 3.08 158 2018 11 04 12 04 01.300 -02 38 07.09 1.3210 .83778 39.3 12.7 2.30 159 2018 11 05 12 07 42.549 -02 31 28.28 1.2858 .81806 39.5 12.7 1.61 161 2018 11 06 12 11 37.800 -02 24 33.47 1.2503 .79833 39.6 12.6 1.03 163 2018 11 07 12 15 48.593 -02 17 22.91 1.2148 .77859 39.7 12.5 .557 166 2018 11 08 12 20 16.676 -02 09 57.20 1.1792 .75884 39.8 12.5 .214 169 2018 11 09 12 25 04.027 -02 02 17.34 1.1435 .73911 39.7 12.4 .012 18 2018 11 10 12 30 12.884 -01 54 24.88 1.1079 .71941 39.6 12.4 .037 170 2018 11 11 12 35 45.781 -01 46 22.09 1.0724 .69976 39.4 12.3 .087 175 2018 11 12 12 41 45.572 -01 38 12.16 1.0370 .68017 39.1 12.3 .403 179 2018 11 13 12 48 15.465 -01 29 59.45 1.0020 .66068 38.7 12.2 .938 4 2018 11 14 12 55 19.038 -01 21 49.79 .96734 .64131 38.2 12.2 1.73 9 2018 11 15 13 03 00.253 -01 13 50.93 .93326 .62209 37.6 12.2 2.84 15 2018 11 16 13 11 23.429 -01 06 12.92 .89990 .60307 36.9 12.1 4.34 21 2018 11 17 13 20 33.190 -00 59 08.70 .86748 .58429 35.9 12.1 6.36 27 2018 11 18 13 30 34.342 -00 52 54.64 .83623 .56579 34.9 12.1 9.08 34 2018 11 19 13 41 31.666 -00 47 51.11 .80645 .54764 33.6 12.2 12.7 40 2018 11 20 13 53 29.594 -00 44 22.92 .77847 .52991 32.2 12.2 17.5 46 2018 11 21 14 06 31.727 -00 42 59.49 .75267 .51268 30.6 12.3 23.9 52 2018 11 22 14 20 40.201 -00 44 14.42 .72946 .49603 28.9 12.4 32.0 57 2018 11 23 14 35 54.893 -00 48 44.35 .70932 .48007 27.0 12.6 42.3 62 2018 11 24 14 52 12.561 -00 57 06.65 .69274 .46491 25.1 12.8 54.7 66 2018 11 25 15 09 26.072 -01 09 56.00 .68019 .45067 23.2 13?? 69.3 69 2018 11 26 15 27 23.938 -01 27 39.97 .67214 .43750 21.5 13?? 85.8 72 2018 11 27 15 45 50.451 -01 50 34.58 .66894 .42553 20.1 13?? 103 75 2018 11 28 16 04 26.552 -02 18 40.80 .67087 .41492 19.0 13?? 122 77 2018 11 29 16 22 51.454 -02 51 43.20 .67803 .40581 18.6 13?? 139 79 2018 11 30 16 40 44.695 -03 29 11.40 .69036 .39836 18.6 13?? 155 80 2018 12 01 16 57 48.181 -04 10 23.82 .70765 .39268 19.1 13?? 169 81 2018 12 02 17 13 47.737 -04 54 32.74 .72952 .38889 19.8 12?? 181 82 2018 12 03 17 28 33.897 -05 40 49.19 .75549 .38705 20.8 12.5 191 82 2018 12 04 17 42 01.911 -06 28 26.81 .78501 .38721 21.7 12.2 200 82 2018 12 05 17 54 11.154 -07 16 44.20 .81748 .38936 22.6 12.0 208 82 2018 12 06 18 05 04.216 -08 05 06.12 .85232 .39346 23.3 11.8 215 81 2018 12 07 18 14 45.902 -08 53 03.64 .88899 .39942 23.9 11.7 223 80 2018 12 08 18 23 22.331 -09 40 13.86 .92699 .40715 24.3 11.6 232 79 2018 12 09 18 31 00.205 -10 26 19.31 .96588 .41650 24.6 11.5 242 78 2018 12 10 18 37 46.276 -11 11 07.29 1.0053 .42733 24.8 11.5 253 76 2018 12 11 18 43 46.991 -11 54 29.07 1.0449 .43949 24.8 11.4 265 75 2018 12 12 18 49 08.290 -12 36 19.25 1.0845 .45284 24.7 11.4 278 74 2018 12 13 18 53 55.505 -13 16 35.11 1.1239 .46723 24.5 11.5 292 73 2018 12 14 18 58 13.334 -13 55 15.98 1.1629 .48252 24.2 11.5 307 71 2018 12 15 19 02 05.867 -14 32 22.79 1.2015 .49859 23.8 11.5 323 70 2018 12 16 19 05 36.628 -15 07 57.60 1.2394 .51533 23.4 11.5 339 69 2018 12 17 19 08 48.636 -15 42 03.34 1.2767 .53264 22.9 11.6 355 69 2018 12 18 19 11 44.470 -16 14 43.44 1.3134 .55043 22.4 11.6 371 68 2018 12 19 19 14 26.325 -16 46 01.69 1.3493 .56863 21.8 11.7 387 67 2018 12 20 19 16 56.069 -17 16 02.04 1.3846 .58717 21.2 11.7 403 66 2018 12 21 19 19 15.294 -17 44 48.52 1.4191 .60598 20.6 11.8 419 66