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. (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. (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 3.353872 +/- 0.217 TT = 8:29:34 (JD 2458455.853872) Epoch 2018 Nov 9.0 TT = JDT 2458431.5 Earth MOID: 0.1086 Ve: 0.0050 q 0.38518847 +/- 0.00147 (J2000 ecliptic) H 10.8 G 0.15 Peri. 88.66178 +/- 0.6 Node 129.34191 +/- 0.32 e 1.0293497 +/- 0.0253 Incl. 143.52634 +/- 0.10 From 187 observations 2018 Nov. 8-10 (40.6 hr); mean residual 6".07 Residuals in arcseconds: 181108 H06 1.5+ 1.4- 181109 L28 .28- .55+ 181110 L28 .16+ .28+ 181108 H06 6.2+ .21- 181109 L28 .44- .49+ 181110 585 .09- .22- 181108 H06 5.8+ .63+ 181109 L28 .55- .23+ 181110 L28 .47+ .89+ 181108 H06 6.1+ .29+ 181109 L28 .36- .48+ 181110 585 .41+ .79- 181108 H06 1.4+ 1.0- 181109 K68 .52- .04- 181110 585 .28- .06- 181108 H06 .87+ 1.1- 181109 G40 .38+ .70+ 181110 585 .07- .44- 181108 H06 .93+ .33- 181109 G40 .09+ .45+ 181110 L28 .13- .10+ 181108 H06 .76+ .11- 181109 G40 1.2- .13- 181110 585 .30- .44- 181108 H06 .81+ .27- 181109 G40 1.1- .20- 181110 585 .04- .28- 181108 H06 .59+ .23- 181109 G40 .48- 1.5+ 181110 L28 .12- .31+ 181108 703 3.3- .82+ 181109 G40 1.4+ .02- 181110 585 .28- .75- 181108 H06 1.3+ .48+ 181109 G40 .67- .40+ 181110 585 .37- .23- 181108 H06 .57+ .11+ 181109 G40 .13+ .25- 181110 L28 .41- .43+ 181108 H06 .67+ .07+ 181109 G40 .27- .29- 181110 585 .05+ .35- 181108 H06 1.3+ .30- 181109 G40 1.9+ .05+ 181110 L28 .40+ .54+ 181108 703 3.5- .22- 181109 G40 .41- .24+ 181110 585 .34- .22- 181108 H06 .80+ .16- 181109 G40 .52+ .04- 181110 L28 .38+ .39+ 181108 H06 .88+ .17- 181109 G40 .20- .09+ 181110 L28 .23+ .20+ 181108 H06 1.3+ .10- 181109 G40 2.0+ .29+ 181110 L28 .54+ .32+ 181108 H06 1.5+ .18- 181109 G40 .22- .00 181110 L28 .40+ .33+ 181108 H06 1.0+ .06+ 181109 G40 .48- .07+ 181110 L28 .14- .24+ 181108 H06 1.0+ .22+ 181109 W96 .41- .38- 181110 L28 .29- .15+ 181108 703 3.9- .19- 181109 W96 1.1- 1.4- 181110 L28 .32+ .37+ 181108 H06 .78+ .22- 181109 W96 .45+ .39- 181110 L28 .48+ .02- 181108 500 106+ 48.1+ 181109 W96 3.7+ .82- 181110 L28 .18+ .19+ 181108 N55 .32+ .42+ 181109 U69 .64- .15+ 181110 L28 .26- .20- 181108 N55 .41+ .50+ 181109 U69 .08- .12+ 181110 L28 .50+ .21+ 181108 N55 .02- .19+ 181109 U69 .59- .23- 181110 L28 .55+ .33+ 181109 N55 .21+ .07+ 181109 367 .06+ .07- 181110 L28 .56+ .14+ 181109 N55 .68+ .14- 181109 367 .10- .14- 181110 L28 .11+ .25+ 181109 N55 .00 .35+ 181109 367 .41- .09+ 181110 L28 .27+ .56+ 181109 N55 .07+ .36- 181109 349 .21- .27- 181110 L28 1.4+ .22- 181109 L28 1.8- 1.2+ 181109 349 .22+ .16+ 181110 L28 .37+ .01- 181109 L28 1.2- .63+ 181109 349 .00 .29+ 181110 L28 .07+ .30+ 181109 L28 .87- 1.2+ 181109 367 .39- .01+ 181110 L28 .38+ .11+ 181109 L28 .75- .94+ 181109 367 .05+ .26- 181110 L28 .53+ .08- 181109 L28 .74- .77+ 181109 367 .27- .03- 181110 L28 .54+ .04+ 181109 L28 .83- .51+ 181110 L28 1.1- 1.7+ 181110 L28 .44+ .05+ 181109 L28 .68- .52+ 181110 L28 .74- 1.3+ 181110 L28 .59+ .16+ 181109 L28 .64- .67+ 181110 L28 .73- 1.1+ 181110 L28 .60+ .07+ 181109 L28 .49- .80+ 181110 L28 .57- .21+ 181110 L28 .45+ .19+ 181109 L28 .75- .75+ 181110 L28 .11- .52+ 181110 L28 .61+ .00 181109 L28 .47- .68+ 181110 L28 1.2- 1.1+ 181110 L28 .76+ .21+ 181109 L28 .77- 1.1+ 181110 L28 .02- .06+ 181110 L28 .46+ .02+ 181109 L28 .28- .77+ 181110 L28 .91- 1.4+ 181110 L28 .51+ .06- 181109 L28 .24- 1.0+ 181110 L28 .75- 1.4+ 181110 L28 .67+ .05+ 181109 L28 .35- .55+ 181110 L28 1.0- 1.1+ 181110 L28 .48+ .06+ 181109 K68 .41+ .46- 181110 L28 .17+ .09- 181110 L28 .38+ .08+ 181109 L28 .15- .70+ 181110 L28 .37- .63+ 181110 L28 .39+ .01- 181109 L28 .46- .54+ 181110 L28 .17- .26+ 181110 L28 .54+ .20+ 181109 L28 .42- .78+ 181110 L28 .48+ .02- 181110 L28 .39+ .21+ 181109 L28 .52- .63+ 181110 L28 .56- .59+ 181110 L28 .54+ .22+ 181109 L28 .18- .57+ 181110 L28 .05+ .00 181110 L28 .70+ .07- 181109 L28 .79- .21+ 181110 585 .04+ .83+ 181110 L28 .55+ .24+ 181109 L28 .75- .35+ 181110 585 .32+ .40- 181110 L28 .60+ .06+ 181109 L28 .56- .30+ 181110 L28 .06+ .72+ 181110 L28 .60+ .13- 181109 L28 .52- .34+ 181110 585 .38- .23+ 181110 L28 .60+ .08+ 181109 L28 .48- .29+ 181110 585 .02- .14- 181110 L28 .45+ .09+ 181109 L28 .44- .13+ 181110 585 .04+ .31- 181110 L28 .30+ .20- 181109 K68 .10+ .30+ 181110 L28 .53- .63+ 181110 L28 .45+ .38- 181109 L28 .40- .62+ 181110 L28 .67- .14+ 181110 L28 .16+ .03+ 181109 L28 .36- .46+ 181110 L28 .59+ .46+ 181109 L28 .32- .20+ 181110 L28 .15+ .17+ Ephemerides for Chelmsford: Date (UTC) RA Dec delta r elong mag " sig PA ---- -- -- ------------- ----------- ------ ------ ----- --- ---- --- 2018 11 10 12 30 12.893 -01 54 24.86 1.1142 .72245 39.6 12.5 .030 7 2018 11 11 12 35 45.630 -01 46 21.42 1.0786 .70251 39.4 12.5 .687 178 2018 11 12 12 41 45.088 -01 38 10.18 1.0431 .68264 39.1 12.4 2.01 1 2018 11 13 12 48 14.443 -01 29 55.38 1.0080 .66286 38.7 12.4 4.09 6 2018 11 14 12 55 17.247 -01 21 42.76 .97321 .64320 38.2 12.3 7.08 11 2018 11 15 13 02 57.426 -01 13 39.91 .93902 .62369 37.6 12.3 11.2 16 2018 11 16 13 11 19.269 -01 05 56.76 .90554 .60438 36.9 12.3 16.7 22 2018 11 17 13 20 27.372 -00 58 46.08 .87300 .58531 36.0 12.3 24.0 28 2018 11 18 13 30 26.517 -00 52 24.11 .84163 .56652 34.9 12.3 33.7 34 2018 11 19 13 41 21.477 -00 47 11.12 .81171 .54809 33.7 12.3 46.6 40 2018 11 20 13 53 16.694 -00 43 31.85 .78357 .53008 32.3 12.3 63.6 46 2018 11 21 14 06 15.812 -00 41 55.74 .75760 .51257 30.7 12.4 85.7 51 2018 11 22 14 20 21.048 -00 42 56.59 .73422 .49566 29.0 12.5 114 56 2018 11 23 14 35 32.407 -00 47 11.45 .71389 .47944 27.1 12.7 149 61 2018 11 24 14 51 46.828 -00 55 18.37 .69709 .46403 25.2 12.9 192 65 2018 11 25 15 08 57.395 -01 07 53.01 .68433 .44956 23.3 13.1 242 69 2018 11 26 15 26 52.857 -01 25 24.24 .67605 .43618 21.6 13?? 299 72 2018 11 27 15 45 17.716 -01 48 09.52 .67263 .42403 20.1 13?? 359 74 2018 11 28 16 03 53.062 -02 16 11.25 .67434 .41327 19.1 13?? 420 76 2018 11 29 16 22 18.153 -02 49 15.14 .68130 .40406 18.6 13?? 480 78 2018 11 30 16 40 12.465 -03 26 51.39 .69346 .39653 18.6 13?? 535 79 2018 12 01 16 57 17.750 -04 08 18.40 .71061 .39084 19.1 13?? 583 80 2018 12 02 17 13 19.625 -04 52 47.79 .73238 .38707 19.8 13?? 624 81 2018 12 03 17 28 08.415 -05 39 29.45 .75827 .38532 20.7 12.6 659 81 2018 12 04 17 41 39.188 -06 27 35.59 .78775 .38561 21.6 12.4 689 81 2018 12 05 17 53 51.195 -07 16 23.37 .82020 .38794 22.5 12.1 716 81 2018 12 06 18 04 46.949 -08 05 16.14 .85505 .39227 23.3 12.0 742 80 2018 12 07 18 14 31.230 -08 53 43.83 .89174 .39850 23.8 11.8 770 79 2018 12 08 18 23 10.160 -09 41 22.66 .92977 .40651 24.3 11.7 800 78 2018 12 09 18 30 50.458 -10 27 54.54 .96870 .41618 24.6 11.6 834 77 2018 12 10 18 37 38.901 -11 13 06.38 1.0082 .42735 24.7 11.6 873 75 2018 12 11 18 43 41.961 -11 56 49.32 1.0478 .43986 24.7 11.6 916 74 2018 12 12 18 49 05.593 -12 38 57.94 1.0875 .45356 24.6 11.6 962 73 2018 12 13 18 53 55.141 -13 19 29.60 1.1269 .46830 24.5 11.6 1011 72 2018 12 14 18 58 15.311 -13 58 23.79 1.1660 .48395 24.2 11.6 1063 71 2018 12 15 19 02 10.191 -14 35 41.66 1.2046 .50037 23.8 11.7 1117 69 2018 12 16 19 05 43.304 -15 11 25.48 1.2427 .51746 23.4 11.7 1172 69 2018 12 17 19 08 57.666 -15 45 38.38 1.2801 .53511 22.9 11.7 1227 68 2018 12 18 19 11 55.848 -16 18 24.01 1.3168 .55324 22.4 11.8 1283 67 2018 12 19 19 14 40.040 -16 49 46.35 1.3529 .57177 21.8 11.8 1338 66 2018 12 20 19 17 12.106 -17 19 49.52 1.3882 .59063 21.2 11.9 1393 66 2018 12 21 19 19 33.631 -17 48 37.70 1.4229 .60977 20.6 11.9 1447 65 2018 12 22 19 21 45.966 -18 16 15.00 1.4568 .62913 19.9 12.0 1500 64 2018 12 23 19 23 50.265 -18 42 45.43 1.4900 .64868 19.3 12.1 1553 64 2018 12 24 19 25 47.515 -19 08 12.88 1.5225 .66837 18.6 12.1 1604 63 2018 12 25 19 27 38.563 -19 32 41.02 1.5543 .68817 17.9 12.2 1653 63 2018 12 26 19 29 24.134 -19 56 13.38 1.5854 .70806 17.2 12.2 1702 63 2018 12 27 19 31 04.856 -20 18 53.27 1.6159 .72801 16.4 12.3 1749 62 2018 12 28 19 32 41.268 -20 40 43.84 1.6456 .74800 15.7 12.3 1795 62 2018 12 29 19 34 13.836 -21 01 48.03 1.6748 .76801 15.0 12.3 1840 61 2018 12 30 19 35 42.964 -21 22 08.64 1.7032 .78803 14.2 12.4 1883 61 2018 12 31 19 37 09.002 -21 41 48.25 1.7311 .80805 13.5 12.4 1925 60 2019 01 01 19 38 32.256 -22 00 49.32 1.7583 .82806 12.7 12.5 1966 60 2019 01 02 19 39 52.992 -22 19 14.15 1.7849 .84804 12.0 12.5 2006 60 2019 01 03 19 41 11.441 -22 37 04.89 1.8109 .86799 11.3 12.6 2045 59 2019 01 04 19 42 27.807 -22 54 23.56 1.8363 .88790 10.5 12.6 2083 59 2019 01 05 19 43 42.268 -23 11 12.05 1.8612 .90777 9.8 12.6 2119 59 2019 01 06 19 44 54.980 -23 27 32.15 1.8854 .92758 9.1 12.7 2155 58 2019 01 07 19 46 06.083 -23 43 25.53 1.9092 .94735 8.4 12.7 2190 58 2019 01 08 19 47 15.697 -23 58 53.77 1.9323 .96705 7.7 12.7 2224 58 2019 01 09 19 48 23.930 -24 13 58.33 1.9550 .98669 7.1 12.8 2257 57 2019 01 10 19 49 30.877 -24 28 40.62 1.9771 1.0063 6.5 12.8 2289 57 2019 01 11 19 50 36.624 -24 43 01.95 1.9986 1.0258 6.0 12.8 2321 57 2019 01 12 19 51 41.244 -24 57 03.54 2.0197 1.0452 5.6 12.9 2351 56 2019 01 13 19 52 44.805 -25 10 46.58 2.0402 1.0646 5.2 12.9 2381 56 2019 01 14 19 53 47.365 -25 24 12.15 2.0603 1.0839 5.0 13.0 2411 56 2019 01 15 19 54 48.979 -25 37 21.32 2.0799 1.1032 4.9 13.0 2439 55 2019 01 16 19 55 49.693 -25 50 15.06 2.0990 1.1223 5.0 13.1 2468 55 2019 01 17 19 56 49.549 -26 02 54.30 2.1176 1.1414 5.2 13.1 2495 55 2019 01 18 19 57 48.587 -26 15 19.95 2.1357 1.1605 5.6 13.2 2522 54 2019 01 19 19 58 46.840 -26 27 32.83 2.1534 1.1794 6.0 13.3 2549 54 2019 01 20 19 59 44.340 -26 39 33.75 2.1706 1.1983 6.5 13.3 2575 54 2019 01 21 20 00 41.116 -26 51 23.47 2.1874 1.2171 7.1 13.4 2601 53 2019 01 22 20 01 37.192 -27 03 02.72 2.2037 1.2359 7.8 13.5 2626 53 2019 01 23 20 02 32.592 -27 14 32.20 2.2196 1.2545 8.5 13.5 2651 52 2019 01 24 20 03 27.336 -27 25 52.57 2.2350 1.2731 9.2 13.6 2676 52 2019 01 25 20 04 21.441 -27 37 04.48 2.2500 1.2917 9.9 13.7 2700 52 2019 01 26 20 05 14.920 -27 48 08.54 2.2646 1.3101 10.7 13.7 2724 51 2019 01 27 20 06 07.785 -27 59 05.35 2.2788 1.3285 11.5 13.8 2748 51 2019 01 28 20 07 00.045 -28 09 55.49 2.2926 1.3468 12.3 13.9 2772 51 2019 01 29 20 07 51.705 -28 20 39.50 2.3059 1.3651 13.1 13.9 2795 50 2019 01 30 20 08 42.771 -28 31 17.92 2.3188 1.3833 13.9 14.0 2819 50 2019 01 31 20 09 33.244 -28 41 51.27 2.3314 1.4014 14.8 14.1 2842 50 2019 02 01 20 10 23.127 -28 52 20.04 2.3435 1.4194 15.6 14.1 2865 49 2019 02 02 20 11 12.419 -29 02 44.72 2.3553 1.4374 16.4 14.2 2888 49 2019 02 03 20 12 01.117 -29 13 05.77 2.3666 1.4553 17.3 14.2 2911 48 2019 02 04 20 12 49.221 -29 23 23.65 2.3776 1.4732 18.1 14.3 2934 48 2019 02 05 20 13 36.726 -29 33 38.78 2.3882 1.4910 19.0 14.3 2957 48 2019 02 06 20 14 23.627 -29 43 51.60 2.3984 1.5087 19.9 14.4 2979 47 2019 02 07 20 15 09.920 -29 54 02.51 2.4082 1.5264 20.7 14.4 3002 47 2019 02 08 20 15 55.599 -30 04 11.92 2.4177 1.5440 21.6 14.5 3025 47 2019 02 09 20 16 40.656 -30 14 20.20 2.4268 1.5615 22.5 14.5 3048 46 2019 02 10 20 17 25.086 -30 24 27.74 2.4355 1.5790 23.4 14.6 3072 46 2019 02 11 20 18 08.881 -30 34 34.91 2.4439 1.5964 24.3 14.6 3095 45 2019 02 12 20 18 52.033 -30 44 42.06 2.4520 1.6138 25.1 14.6 3118 45 2019 02 13 20 19 34.533 -30 54 49.53 2.4596 1.6311 26.0 14.7 3142 45 2019 02 14 20 20 16.375 -31 04 57.66 2.4670 1.6483 26.9 14.7 3166 44 2019 02 15 20 20 57.548 -31 15 06.79 2.4740 1.6655 27.8 14.8 3190 44 2019 02 16 20 21 38.046 -31 25 17.22 2.4807 1.6827 28.7 14.8 3215 43 2019 02 17 20 22 17.859 -31 35 29.29 2.4871 1.6997 29.6 14.8 3239 43