MPEC 2019-N12 : C/2019 K7
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M.P.E.C. 2019-N12 Issued 2019 July 1, 20:42 UT The Minor Planet Electronic Circulars contain information on unusual minor planets and routine data on comets. They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A. Prepared using the Tamkin Foundation Computer Network MPC@CFA.HARVARD.EDU URL https://www.minorplanetcenter.net/ ISSN 1523-6714 COMET C/2019 K7 (Smith) This object was reported as cometary by A. Heinze (T05) in discovery images obtained on 2019 May 30 UT: "This object is extended relative to nearby field stars of similar brightness on all four images. We find the FWHM to be larger with at least 7 sigma significance relative to field stars, with an average FWHM excess amounting to 5.5 arcsec in quadrature. A faint tail at least 20 arcseconds long extends toward the south-southeast, at a position angle of about 160 degrees." Other reports of cometary features are summarized below: OC Date Reporter Coma Tail I47 June 1 M. Masek 14" in P.A. 160 (20 x 60s) N55 June 1 D. W. E. Green 6" ~20" in P.A. 141-169 (19 x 40s) N55 June 2 D. W. E. Green 6" ~15" in P.A. ~176 (19 x 40s) K91 June 2 J. D. Armstrong 20" I47 June 4 M. Masek 12" 25" in P.A. 150 (17 x 60s) Q62 June 4 R. Ligustri ~70" in P.A. 150 (4 x 300s) Q62 June 4 H. Sato 12" 2" in P.A. 340 (6 x 60s) Q62 June 5 A. Valvasori ~13" ~37" in P.A. 158 N55 June 5 D. W. E. Green 6"x9" (19 x 40s) N55 June 6 D. W. E. Green ~8" ~12" in P.A. ~156 (19 x 40s) N55 June 7 D. W. E. Green ~7" ~20" in P.A. ~153 (20 x 40s) N55 June 8 D. W. E. Green ~3' in P.A. ~144 (3 x 40s) N55 June 9 D. W. E. Green 5"-7" ~40" in P.A. ~160 (19 x 40s) N55 June 10 D. W. E. Green 4"-5" ~40" in P.A. ~155 (30 x 40s) N55 June 12 D. W. E. Green 5"-7" in P.A. 150 and 330 (15 x 40s) N55 June 14 D. W. E. Green 6"-7" ~30" in P.A. ~154 (19 x 40s) Q62 June 15 E. Bryssinck 11" 45" in P.A. 147 E94 June 17 J. Drummond ~60" in P.A. ~158 (13 x 60s) X74 June 25 L. S. Amaral ~16" (3 x 60s) Q38 June 27 M. Mattiazzo 2' in P.A. 144 850 July 1 D. T. Durig 11" 27" in P.A. 147 (378 x 10s) Observations: CK19K070* C2019 05 30.56534 22 23 48.17 -34 43 04.0 17.7 cVEN012T05 CK19K070 C2019 05 30.56815 22 23 48.13 -34 43 04.7 17.2 cVEN012T05 CK19K070 C2019 05 30.57534 22 23 47.96 -34 43 04.3 17.8 cVEN012T05 CK19K070 C2019 05 30.58628 22 23 47.72 -34 43 04.8 17.2 cVEN012T05 CK19K070 *C2019 06 01.15896 22 23 12.18 -34 43 18.2 17.4 GVEN012G40 CK19K070 *C2019 06 01.18498 22 23 11.59 -34 43 18.2 17.3 GVEN012G40 CK19K070 KC2019 06 01.37733 22 23 07.01 -34 43 19.3 16.8 VqEN012I47 CK19K070 KC2019 06 01.38162 22 23 06.90 -34 43 19.4 17.3 VqEN012I47 CK19K070 KC2019 06 01.38547 22 23 06.81 -34 43 19.7 17.2 VqEN012I47 CK19K070 C2019 06 01.55981322 23 02.75 -34 43 22.7 16.92oVEN012T08 CK19K070 C2019 06 01.56309422 23 02.66 -34 43 23.0 16.93oVEN012T08 CK19K070 C2019 06 01.57176022 23 02.46 -34 43 23.4 16.98oVEN012T08 CK19K070 C2019 06 01.58731922 23 02.08 -34 43 23.3 17.02oVEN012T08 CK19K070 KC2019 06 01.75528 22 22 58.02 -34 43 23.8 17.2 GVEN012Q67 CK19K070 KC2019 06 01.76003 22 22 57.94 -34 43 23.5 17.5 GVEN012Q67 CK19K070 C2019 06 01.92874 22 22 53.88 -34 43 27.0 17.6 RqEN012N55 CK19K070 C2019 06 01.93183 22 22 53.77 -34 43 27.0 17.4 RqEN012N55 CK19K070 C2019 06 01.93527 22 22 53.71 -34 43 27.5 16.9 RqEN012N55 CK19K070 C2019 06 02.11337322 22 49.30 -34 43 28.3 17.1 RtEN012K91 CK19K070 C2019 06 02.11715322 22 49.21 -34 43 28.3 16.9 RtEN012K91 CK19K070 C2019 06 02.12093222 22 49.09 -34 43 28.4 17.9 RtEN012K91 CK19K070 C2019 06 02.12471322 22 49.00 -34 43 28.4 17.8 RtEN012K91 CK19K070 C2019 06 02.91690 22 22 29.38 -34 43 42.0 16.9 RqEN012N55 CK19K070 C2019 06 02.92006 22 22 29.32 -34 43 42.3 17.1 RqEN012N55 CK19K070 C2019 06 02.92322 22 22 29.27 -34 43 41.8 17.3 RqEN012N55 CK19K070 C2019 06 03.20410 22 22 22.02 -34 43 46.7 17.1 RqEN012J22 CK19K070 C2019 06 03.20610 22 22 22.00 -34 43 46.9 17.1 RqEN012J22 CK19K070 C2019 06 03.20802 22 22 21.99 -34 43 45.6 17.2 RqEN012J22 CK19K070 C2019 06 03.55579922 22 13.04 -34 43 53.2 17.55cVEN012T05 CK19K070 C2019 06 03.55904422 22 12.94 -34 43 53.4 17.57cVEN012T05 CK19K070 C2019 06 03.56580422 22 12.78 -34 43 53.3 17.46cVEN012T05 CK19K070 C2019 06 03.57677122 22 12.48 -34 43 53.4 17.24cVEN012T05 CK19K070 KC2019 06 04.34928 22 21 52.04 -34 44 07.0 16.8 VqEN012I47 CK19K070 KC2019 06 04.36099 22 21 51.72 -34 44 06.3 17.0 VqEN012I47 CK19K070 KC2019 06 04.37140 22 21 51.45 -34 44 07.8 16.9 VqEN012I47 CK19K070 1C2019 06 04.65267 22 21 43.91 -34 44 12.9 VEN012Q62 CK19K070 1C2019 06 04.65529 22 21 43.82 -34 44 13.0 16.9 GVEN012Q62 CK19K070 3C2019 06 04.73713 22 21 41.54 -34 44 14.9 17.1 RqEN012Q62 CK19K070 3C2019 06 04.75802 22 21 40.95 -34 44 15.6 16.8 RqEN012Q62 CK19K070 3C2019 06 04.76168 22 21 40.85 -34 44 15.7 16.9 RqEN012Q62 CK19K070 2C2019 06 05.73609 22 21 13.72 -34 44 37.7 17.3 VqEN012Q62 CK19K070 2C2019 06 05.73770 22 21 13.70 -34 44 37.8 17.4 VqEN012Q62 CK19K070 2C2019 06 05.74009 22 21 13.61 -34 44 37.9 17.3 VqEN012Q62 CK19K070 AC2019 06 05.75508 22 21 13.19 -34 44 38.3 16.8 RVEN012Q62 CK19K070 AC2019 06 05.76290 22 21 12.94 -34 44 38.3 16.7 RVEN012Q62 CK19K070 AC2019 06 05.77175 22 21 12.69 -34 44 38.8 16.7 RVEN012Q62 CK19K070 KC2019 06 05.92630 22 21 08.33 -34 44 44.3 16.8 RqEN012N55 CK19K070 KC2019 06 05.92940 22 21 08.18 -34 44 44.2 16.8 RqEN012N55 CK19K070 KC2019 06 05.92999 22 21 08.29 -34 44 42.6 17.1 GVEN012L29 CK19K070 KC2019 06 05.93284 22 21 08.05 -34 44 43.8 16.8 RqEN012N55 CK19K070 KC2019 06 05.93609 22 21 08.09 -34 44 42.0 17.7 GVEN012L29 CK19K070 KC2019 06 05.94220 22 21 07.94 -34 44 42.4 17.7 GVEN012L29 CK19K070 KC2019 06 06.91853 22 20 39.38 -34 45 09.9 16.5 RqEN012N55 CK19K070 KC2019 06 06.92167 22 20 39.28 -34 45 09.7 16.8 RqEN012N55 CK19K070 KC2019 06 06.92516 22 20 39.18 -34 45 09.3 qEN012N55 CK19K070 KC2019 06 07.92935 22 20 08.77 -34 45 38.5 17.7 RqEN012N55 CK19K070 KC2019 06 07.93282 22 20 08.68 -34 45 38.9 17.1 RqEN012N55 CK19K070 KC2019 06 07.93629 22 20 08.56 -34 45 38.8 17.2 RqEN012N55 CK19K070 KC2019 06 08.93815 22 19 37.01 -34 46 09.6 16.2 RqEN012N55 CK19K070 KC2019 06 08.93884 22 19 37.00 -34 46 09.6 16.4 RqEN012N55 CK19K070 3C2019 06 09.37177 22 19 23.08 -34 46 22.8 17.1 GVEN012W88 CK19K070 3C2019 06 09.38028 22 19 22.82 -34 46 23.1 17.3 GVEN012W88 CK19K070 C2019 06 09.55101322 19 17.29 -34 46 30.6 16.89oVEN012T08 CK19K070 C2019 06 09.55147322 19 17.32 -34 46 30.7 16.75oVEN012T08 CK19K070 C2019 06 09.55873522 19 17.05 -34 46 30.8 16.85oVEN012T08 CK19K070 C2019 06 09.56057522 19 16.99 -34 46 31.0 16.80oVEN012T08 CK19K070 C2019 06 09.56473222 19 16.88 -34 46 31.2 16.91oVEN012T08 CK19K070 C2019 06 09.57059722 19 16.68 -34 46 31.4 16.90oVEN012T08 CK19K070 C2019 06 09.57386922 19 16.56 -34 46 31.7 16.83oVEN012T08 CK19K070 C2019 06 09.57433022 19 16.55 -34 46 31.8 16.92oVEN012T08 CK19K070 KC2019 06 09.92968 22 19 04.82 -34 46 42.8 17.6 RqEN012N55 CK19K070 KC2019 06 09.93280 22 19 04.72 -34 46 43.3 17.4 RqEN012N55 CK19K070 KC2019 06 09.93766 22 19 04.53 -34 46 42.9 17.3 RqEN012N55 CK19K070 KC2019 06 10.90448 22 18 32.01 -34 47 17.2 17.0 RqEN012N55 CK19K070 KC2019 06 10.90964 22 18 31.83 -34 47 17.7 16.7 RqEN012N55 CK19K070 KC2019 06 10.91480 22 18 31.67 -34 47 17.6 17.0 RqEN012N55 CK19K070 C2019 06 11.52750422 18 10.49 -34 47 39.8 16.78oVEN012T05 CK19K070 C2019 06 11.53027022 18 10.41 -34 47 40.7 16.90oVEN012T05 CK19K070 C2019 06 11.54015622 18 10.07 -34 47 41.0 16.73oVEN012T05 CK19K070 C2019 06 11.54520622 18 09.86 -34 47 40.8 17.40oVEN012T05 CK19K070 KC2019 06 12.93642 22 17 20.06 -34 48 35.1 16.9 RqEN012N55 CK19K070 KC2019 06 12.93879 22 17 19.98 -34 48 35.0 16.8 RqEN012N55 CK19K070 KC2019 06 12.94117 22 17 19.91 -34 48 35.5 16.9 RqEN012N55 CK19K070 KC2019 06 14.93176 22 16 04.78 -34 49 58.9 17.4 RqEN012N55 CK19K070 KC2019 06 14.93494 22 16 04.65 -34 49 58.4 16.6 RqEN012N55 CK19K070 KC2019 06 14.94028 22 16 04.38 -34 49 58.0 17.5 RqEN012N55 CK19K070 C2019 06 15.50293922 15 42.41 -34 50 22.3 17.44oVEN012T05 CK19K070 C2019 06 15.50576222 15 42.32 -34 50 23.2 17.25oVEN012T05 CK19K070 C2019 06 15.51230622 15 42.06 -34 50 23.5 16.63oVEN012T05 CK19K070 C2019 06 15.52315722 15 41.63 -34 50 24.3 16.93oVEN012T05 CK19K070 6C2019 06 15.74558 22 15 32.70 -34 50 32.4 17.0 RqEN012Q62 CK19K070 6C2019 06 15.74872 22 15 32.57 -34 50 32.6 16.9 RqEN012Q62 CK19K070 6C2019 06 15.75183 22 15 32.46 -34 50 32.8 17.0 RqEN012Q62 CK19K070 6C2019 06 15.75495 22 15 32.33 -34 50 33.0 17.0 RqEN012Q62 CK19K070 KC2019 06 16.64247 22 14 56.58 -34 51 14.0 17.2 VqEN012E94 CK19K070 KC2019 06 16.66314 22 14 55.69 -34 51 14.4 17.2 VqEN012E94 CK19K070 KC2019 06 16.68382 22 14 54.82 -34 51 14.9 17.1 VqEN012E94 CK19K070 KC2019 06 16.70492 22 14 53.92 -34 51 16.2 17.1 VqEN012E94 CK19K070 KC2019 06 16.72644 22 14 53.01 -34 51 16.9 17.2 VqEN012E94 CK19K070 KC2019 06 16.74632 22 14 52.19 -34 51 17.6 17.2 VqEN012E94 CK19K070 KC2019 06 17.64869 22 14 14.74 -34 51 58.8 17.3 VqEN012E94 CK19K070 KC2019 06 17.65188 22 14 14.58 -34 51 58.8 17.3 VqEN012E94 CK19K070 KC2019 06 17.65508 22 14 14.52 -34 51 59.9 17.3 VqEN012E94 CK19K070 KC2019 06 17.66896 22 14 13.89 -34 52 00.1 17.3 VqEN012E94 CK19K070 KC2019 06 17.67175 22 14 13.76 -34 52 00.4 17.2 VqEN012E94 CK19K070 KC2019 06 17.67495 22 14 13.66 -34 52 00.6 17.2 VqEN012E94 CK19K070 KC2019 06 17.69045 22 14 13.13 -34 52 01.2 17.2 VqEN012E94 CK19K070 KC2019 06 17.69364 22 14 12.82 -34 52 01.5 17.2 VqEN012E94 CK19K070 KC2019 06 17.69684 22 14 12.70 -34 52 02.3 17.2 VqEN012E94 CK19K070 KC2019 06 17.71197 22 14 12.04 -34 52 02.7 17.2 VqEN012E94 CK19K070 KC2019 06 17.71517 22 14 11.92 -34 52 02.9 17.2 VqEN012E94 CK19K070 KC2019 06 17.71876 22 14 11.79 -34 52 03.1 17.2 VqEN012E94 CK19K070 KC2019 06 20.15517 22 12 25.61 -34 53 58.7 16.9 GVEN012822 CK19K070 KC2019 06 20.16234 22 12 25.27 -34 53 59.0 17.5 GVEN012822 CK19K070 C2019 06 25.25086 22 08 20.35 -34 58 12.3 17.2 RqEN012X74 CK19K070 C2019 06 25.26294 22 08 19.75 -34 58 13.8 17.4 RqEN012X74 CK19K070 C2019 06 25.27501 22 08 19.09 -34 58 14.3 17.3 RqEN012X74 CK19K070 C2019 06 25.53627622 08 05.69 -34 58 27.4 16.94oVEN012T08 CK19K070 C2019 06 25.54170822 08 05.40 -34 58 27.8 16.59oVEN012T08 CK19K070 C2019 06 25.56119522 08 04.37 -34 58 28.9 16.69oVEN012T08 CK19K070 KC2019 06 26.67403 22 07 06.23 -34 59 21.5 17.0 VqEN012E94 CK19K070 KC2019 06 26.68503 22 07 05.60 -34 59 23.6 16.9 VqEN012E94 CK19K070 KC2019 06 26.69559 22 07 05.08 -34 59 24.2 16.9 VqEN012E94 CK19K070 C2019 06 27.44716 22 06 25.01 -35 00 01.0 16.6 GVEN012I52 CK19K070 C2019 06 27.45290 22 06 24.65 -35 00 01.6 16.8 GVEN012I52 CK19K070 C2019 06 27.45817 22 06 24.41 -35 00 02.3 16.5 GVEN012I52 CK19K070 C2019 06 27.46338 22 06 24.12 -35 00 02.2 16.5 GVEN012I52 CK19K070 C2019 06 27.59370 22 06 17.10 -35 00 05.6 17.2 GVEN012Q38 CK19K070 C2019 06 27.59809 22 06 17.04 -35 00 06.1 17.8 GVEN012Q38 CK19K070 C2019 06 27.60245 22 06 16.69 -35 00 06.8 17.1 GVEN012Q38 CK19K070 KC2019 06 28.62823 22 05 20.70 -35 00 55.8 17.8 VqEN012E23 CK19K070 KC2019 06 28.63518 22 05 20.27 -35 00 55.7 17.6 VqEN012E23 CK19K070 KC2019 06 28.64212 22 05 19.87 -35 00 56.3 17.6 VqEN012E23 CK19K070 C2019 06 29.56648422 04 28.29 -35 01 42.2 16.66oVEN012T08 CK19K070 C2019 06 29.56974722 04 28.12 -35 01 42.7 16.48oVEN012T08 CK19K070 C2019 06 29.57685222 04 27.71 -35 01 42.9 16.53oVEN012T08 CK19K070 C2019 06 29.59104522 04 26.92 -35 01 43.4 16.98oVEN012T08 CK19K070 KC2019 07 01.34890 22 02 45.98 -35 03 02.7 16.7 RuEN012850 CK19K070 KC2019 07 01.35959 22 02 45.34 -35 03 03.2 16.7 RuEN012850 CK19K070 KC2019 07 01.37014 22 02 44.73 -35 03 03.6 16.7 RuEN012850 CK19K070 KC2019 07 01.37907 22 02 44.21 -35 03 04.4 16.6 RuEN012850 CK19K070 KC2019 07 01.39392 22 02 43.32 -35 03 04.9 16.8 RuEN012850 Observer details: 822 Cordoba. Observers C. Pittari, G. Ferrero, J. Garcia, A. Taveira, M. Santucho. Measurer M. Santucho. 0.36-m f/5.10 Schmidt-Cassegrain + CCD. 850 Cordell-Lorenz Observatory, Sewanee. Observer D. T. Durig. 0.3-m f/7.6 Schmidt-Cassegrain + 1536x1024 CCD. E23 Arcadia. Observer A. Hidas. 0.35-m f/1.9 reflector + CCD. E94 Possum Observatory, Gisborne. Observer J. Drummond. 0.41-m f/4.5 Newtonian reflector + CCD. G40 Slooh.com Canary Islands Observatory. Observer M. Suzuki. 0.36-m f/11.0 Schmidt-Cassegrain + CCD. I47 Pierre Auger Observatory, Malargue. Observer M. Masek. 0.3-m f/6.8 reflector + CCD. I52 Steward Observatory, Mt. Lemmon Station. Observer G. J. Leonard. Measurers B. M. Africano, E. J. Christensen, G. A. Farneth, D. C. Fuls, A. R. Gibbs, A. D. Grauer, H. Groeller, R. A. Kowalski, S. M. Larson, G. J. Leonard, T. A. Pruyne, D. Rankin, R. L. Seaman, F. C. Shelly. 1.0-m reflector + CCD. J22 Tacande Observatory, La Palma. Observer K. Hills. 0.5-m f/2.9 astrograph + CCD. K91 Sutherland-LCO A. Observer J. D. Armstrong. 1.0-m f/8 Ritchey-Chretien + CCD. L29 Drebach-South Observatory, Windhoek. Observer G. Lehmann. 0.4-m f/3.6 reflector + CCD. N55 Corona Borealis Observatory, Ngari. Observers T. Chen, P. Sun, J. Liu. Measurer D. W. E. Green. 0.3-m f/7.2 reflector + CCD. Q38 Swan Hill. Observer M. Mattiazzo. Q62 iTelescope Observatory, Siding Spring. Observers H. Sato, R. Ligustri, M. Urbanik, A. Valvasori, E. Bryssinck. 0.51-m f/6.8 astrograph + CCD + f/4.5 focal reducer, 0.43-m f/6.8 astrograph + CCD, 0.51-m f/4.4 reflector + CCD, 0.51-m f/4.5 Ritchey-Chretien + CCD. Q67 JBL Observatory, Bathurst. Observer B. Lutkenhoner. 0.31-m f/9.0 reflector + CCD. T05 ATLAS-HKO, Haleakala. Observers L. Denneau, A. Heinze, H. Weiland, J. Tonry, H. Flewelling. Measurers L. Denneau, A. Heinze, J. Tonry, A. Fitzsimmons, K. Smith, H. Weiland, H. Flewelling, B. Stalder, D. Young, N. Erasmus. 0.5-m f/2.0 Schmidt + CCD, 0.5-m reflector + CCD. T08 ATLAS-MLO, Mauna Loa. Observers L. Denneau, J. Tonry, A. Heinze, H. Weiland, H. Flewelling. Measurers L. Denneau, J. Tonry, A. Heinze, H. Weiland, H. Flewelling, B. Stalder, A. Fitzsimmons, D. Young, N. Erasmus. 0.5-m reflector + CCD. W88 Slooh.com Chile Observatory, La Dehesa. Observer B. Lutkenhoner. 0.35-m f/11.0 Schmidt-Cassegrain + CCD. X74 Observatorio Campo dos Amarais. Observer L. S. Amaral. 0.31-m f/2.9 Newtonian reflector + CCD. Orbital elements: C/2019 K7 (Smith) Epoch 2020 May 31.0 TT = JDT 2459000.5 T 2020 June 17.20481 TT MPCLINUX q 4.4653924 (2000.0) P Q z -0.0027161 Peri. 27.50830 +0.45905391 -0.44843291 +/-0.0016262 Node 307.89933 -0.88195288 -0.12614975 e 1.0121284 Incl. 103.61194 +0.10690473 +0.88486957 From 142 observations 2019 May 30-July 1, mean residual 0".4. C/2019 K7 (Smith) Epoch 2019 Apr. 27.0 TT = JDT 2458600.5 T 2020 June 17.09587 TT MPCLINUX q 4.4660349 (2000.0) P Q z -0.0027291 Peri. 27.48191 +0.45946141 -0.44764936 +/-0.0016262 Node 307.89311 -0.88177209 -0.12618770 e 1.0121881 Incl. 103.56593 +0.10664520 +0.88526082 From 142 observations 2019 May 30-July 1, mean residual 0".4. Ephemeris: Date TT R. A. (2000) Decl. Delta r Elong. Phase m1 2019 06 01 22 23 15.9 -34 43 15 5.0820 5.4217 104.3 10.4 17.1 ... 2019 06 16 22 15 22.6 -34 50 44 4.7906 5.3562 118.9 9.6 16.9 ... 2019 06 24 22 09 23.4 -34 57 09 4.6483 5.3219 127.0 8.8 16.8 ... 2019 06 30 22 04 03.8 -35 02 00 4.5499 5.2965 133.1 8.1 16.7 2019 07 01 22 03 06.4 -35 02 46 4.5343 5.2923 134.1 7.9 16.7 2019 07 02 22 02 07.8 -35 03 29 4.5189 5.2881 135.1 7.8 16.7 ... 2019 07 08 21 55 52.0 -35 07 07 4.4322 5.2630 141.2 7.0 16.6 ... 2019 07 16 21 46 31.0 -35 08 54 4.3326 5.2300 149.0 5.7 16.6 ... 2019 07 31 21 26 33.3 -34 56 42 4.2019 5.1695 160.4 3.8 16.5 M. P. C. Staff (C) Copyright 2019 MPC M.P.E.C. 2019-N12


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