MPEC 2021-C224 : 2021 CS5
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M.P.E.C. 2021-C224 Issued 2021 February 11, 22:42 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 2021 CS5 Observations: K21C05S C2021 02 10.26528007 49 03.859+29 43 53.37 VEC224F51 K21C05S* C2021 02 10.27669007 49 10.614+29 42 45.96 20.35wUEC224F51 K21C05S C2021 02 10.28838107 49 17.543+29 41 36.37 20.53wUEC224F51 K21C05S KC2021 02 10.83907607 54 44.88 +28 46 46.8 20.7 GVEC224J95 K21C05S KC2021 02 10.85160007 54 51.86 +28 45 35.6 20.8 GVEC224J95 K21C05S KC2021 02 10.86685507 55 00.19 +28 44 09.9 20.1 GVEC224J95 K21C05S 2C2021 02 10.87237807 55 04.959+28 44 01.40 20.2 GVEC224J04 K21C05S 2C2021 02 10.87419307 55 05.951+28 43 51.07 20.3 GVEC224J04 K21C05S 2C2021 02 10.87601307 55 06.936+28 43 40.94 20.0 GVEC224J04 K21C05S !C2021 02 11.27060 07 58 42.88 +28 06 26.5 19.4 RVEC224673 K21C05S !C2021 02 11.27569 07 58 45.48 +28 05 58.3 19.4 RVEC224673 K21C05S C2021 02 11.31596 07 59 06.05 +28 02 13.5 20.7 GVEC224654 K21C05S KC2021 02 11.34755907 59 21.70 +27 59 16.7 20.17GVEC224I52 K21C05S KC2021 02 11.34854507 59 22.17 +27 59 11.4 20.37GVEC224I52 K21C05S KC2021 02 11.34953307 59 22.69 +27 59 06.0 20.25GVEC224I52 K21C05S KC2021 02 11.35051907 59 23.21 +27 59 00.0 20.20GVEC224I52 K21C05S C2021 02 11.36141 07 59 29.27 +27 57 58.7 20.4 GVEC224654 K21C05S C2021 02 11.38922 07 59 43.50 +27 55 22.3 20.5 GVEC224654 K21C05S KC2021 02 11.77949408 03 11.86 +27 19 52.7 20.7 GVEC224587 K21C05S KC2021 02 11.77986408 03 11.97 +27 19 51.6 20.5 GVEC224587 K21C05S bC2021 02 11.83179408 03 36.89 +27 15 21.4 19.6 GVEC224L01 K21C05S bC2021 02 11.83331008 03 37.57 +27 15 13.5 20.4 GVEC224L01 K21C05S bC2021 02 11.83524808 03 38.48 +27 15 03.5 19.8 GVEC224L01 Observer details: 587 Sormano. Observers E. Colzani, G. Ventre. Measurer P. Sicoli. 0.5-m f/6.8 reflector + CCD. 654 Table Mountain Observatory, Wrightwood-PHMC. Observers P. Choi, N. Saini, C. Zhai, R. Trahan, M. Shao. 673 Table Mountain Observatory, Wrightwood. Observer J. Pittichova. 1.0-m f/15 reflector + CCD. F51 Pan-STARRS 1, Haleakala. Observers J. Bulger, K. Chambers, T. Lowe, A. Schultz, M. Willman. Measurers S. Chastel, M. Huber, Y. Ramanjooloo, R. Wainscoat, R. Weryk, K. Chambers, T. de Boer, L. Denneau, J. Fairlamb, H. Flewelling, C.-C. Lin, E. Magnier. 1.8-m Ritchey-Chretien + CCD. I52 Steward Observatory, Mt. Lemmon Station. Observer T. A. Pruyne. Measurers 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, K. W. Wierzchos. 1.0-m reflector + CCD. J04 ESA Optical Ground Station, Tenerife. Observer D. Abreu. Measurers M. Micheli, D. Koschny, L. Conversi, R. Kresken, A. Knofel, M. Busch, E. Schwab. 1.0-m f/4.4 reflector + CCD. J95 Great Shefford. Observer P. Birtwhistle. 0.41-m f/6.3 Schmidt-Cassegrain + CCD. L01 Visnjan Observatory, Tican. Observer K. Korlevic. 1.0-m f/2.9 reflector + CCD. Orbital elements: 2021 CS5 Earth MOID = 0.0381 AU Epoch 2020 Dec. 17.0 TT = JDT 2459200.5 Veres M 357.24321 (2000.0) P Q n 0.23719376 Peri. 112.40501 +0.14437127 -0.98854943 a 2.5846428 Node 329.19321 +0.87343358 +0.14815723 e 0.6542017 Incl. 4.91700 +0.46504915 +0.02862631 P 4.16 H 23.7 G 0.15 U 6 Residuals in seconds of arc 210210 F51 0.4- 0.1+ 210210 J04 0.3- 0.2+ 210211 654 0.1- 0.1+ 210210 F51 0.4- 0.2+ 210211 673 0.4+ 0.3- 210211 654 0.1- 0.2+ 210210 F51 0.0 0.1- 210211 673 0.3+ 0.1- 210211 587 1.8+ 0.7- 210210 J95 0.2+ 0.4- 210211 654 0.1- 0.0 210211 587 0.9+ 0.2+ 210210 J95 0.6+ 0.4- 210211 I52 0.2+ 0.1- 210211 L01 0.3- 0.0 210210 J95 0.7- 0.7+ 210211 I52 0.3- 0.1+ 210211 L01 1.0- 0.1+ 210210 J04 0.2- 0.2+ 210211 I52 0.1- 0.3+ 210211 L01 1.3- 0.2+ 210210 J04 0.2- 0.1+ 210211 I52 0.1+ 0.2- Ephemeris: 2021 CS5 a,e,i = 2.58, 0.65, 5 q = 0.8938 Date TT R. A. (2000) Decl. Delta r Elong. Phase V 2021 01 12 23 01 52.2 +15 02 57 0.1705 0.9183 62.8 107.6 23.7 ... 2021 01 27 01 40 34.4 +40 12 53 0.08182 0.9903 91.6 83.7 21.2 ... 2021 02 04 06 01 04.0 +42 02 29 0.08301 1.0433 132.2 44.4 20.1 ... 2021 02 10 07 46 12.3 +30 10 54 0.1145 1.0880 150.6 26.4 20.4 2021 02 11 07 56 13.5 +28 32 02 0.1212 1.0958 152.3 24.7 20.5 2021 02 12 08 04 58.4 +27 01 03 0.1283 1.1036 153.7 23.3 20.6 ... 2021 02 18 08 40 16.6 +20 13 47 0.1752 1.1525 157.8 18.9 21.2 ... 2021 02 26 09 05 07.2 +15 05 06 0.2469 1.2210 156.9 18.5 22.0 ... 2021 03 13 09 30 29.8 +10 23 27 0.4037 1.3560 149.0 22.2 23.5 M. P. C. Staff (C) Copyright 2021 MPC M.P.E.C. 2021-C224


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