MPEC 2020-B55 : 2018 CW13
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M.P.E.C. 2020-B55 Issued 2020 January 21, 11:45 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
2018 CW13
Revision to MPEC 2018-D3
Additional Observations:
K18C13W C2020 01 19.44032 11 40 20.73 +07 42 23.0 20.0 VoEB055691
K18C13W C2020 01 19.44706 11 40 19.24 +07 42 55.9 19.8 VoEB055691
K18C13W C2020 01 19.45379 11 40 17.75 +07 43 28.9 20.0 VoEB055691
K18C13W KC2020 01 19.47728 11 40 12.50 +07 45 25.7 19.2 RoEB055291
K18C13W KC2020 01 19.47888 11 40 12.14 +07 45 33.5 19.4 RoEB055291
K18C13W KC2020 01 19.48049 11 40 11.78 +07 45 41.5 19.4 RoEB055291
K18C13W C2020 01 19.49405311 40 08.65 +07 46 47.8 19.1 GVEB055H01
K18C13W C2020 01 19.49744311 40 07.89 +07 47 04.5 19.2 GVEB055H01
K18C13W C2020 01 19.50851211 40 05.42 +07 47 59.4 19.3 GVEB055H01
K18C13W C2020 01 19.51713611 40 03.50 +07 48 42.1 19.2 GVEB055H01
K18C13W C2020 01 19.52858 11 40 01.01 +07 49 39.2 19.8 GVEB055I52
K18C13W KC2020 01 19.53170 11 40 00.34 +07 49 55.1 19.2 RoEB055291
K18C13W C2020 01 19.53228 11 40 00.19 +07 49 57.6 19.3 GVEB055I52
K18C13W C2020 01 19.53269 11 40 00.09 +07 49 59.8 19.3 GVEB055I52
K18C13W C2020 01 19.53311 11 40 00.00 +07 50 01.9 19.3 GVEB055I52
K18C13W KC2020 01 19.53370 11 39 59.89 +07 50 05.0 19.1 RoEB055291
K18C13W KC2020 01 19.53610 11 39 59.36 +07 50 17.0 19.4 RoEB055291
K18C13W C2020 01 19.57207911 39 52.315+07 53 19.55 19.68wUEB055F52
K18C13W C2020 01 19.58394111 39 49.649+07 54 18.34 19.60wUEB055F52
K18C13W C2020 01 19.59583411 39 46.980+07 55 17.27 19.54wUEB055F52
K18C13W KC2020 01 20.11938211 37 53.64 +08 38 16.8 20.5 GVEB055L01
K18C13W KC2020 01 20.12069511 37 53.37 +08 38 22.9 20.6 GVEB055L01
K18C13W KC2020 01 20.12200611 37 53.02 +08 38 29.9 20.7 GVEB055L01
K18C13W pC2020 01 20.12484011 37 52.43 +08 38 44.0 20.7 GVEB055L01
K18C13W KC2020 01 20.37649 11 36 58.32 +08 59 26.9 19.4 RoEB055691
K18C13W KC2020 01 20.38330 11 36 56.79 +09 00 00.6 20.2 RoEB055691
K18C13W KC2020 01 20.39010 11 36 55.27 +09 00 34.2 20.0 RoEB055691
K18C13W C2020 01 21.07282 11 34 25.19 +09 56 13.3 19.5 VVEB055033
K18C13W C2020 01 21.07366 11 34 25.00 +09 56 17.4 19.8 VVEB055033
K18C13W C2020 01 21.07452 11 34 24.81 +09 56 21.4 20.1 VVEB055033
K18C13W C2020 01 21.20604 11 33 55.02 +10 07 02.8 20.1 VVEB055033
K18C13W C2020 01 21.20688 11 33 54.83 +10 07 07.1 20.1 VVEB055033
K18C13W C2020 01 21.20774 11 33 54.64 +10 07 11.1 20.4 VVEB055033
K18C13W KC2020 01 21.43238 11 33 05.33 +10 25 29.8 20.1 RqEB055734
K18C13W KC2020 01 21.43582 11 33 04.60 +10 25 46.2 20.6 RqEB055734
K18C13W KC2020 01 21.43926 11 33 03.79 +10 26 02.7 20.0 RqEB055734
K18C13W KC2020 01 21.44270 11 33 02.98 +10 26 20.0 20.2 RqEB055734
Observer details:
033 Karl Schwarzschild Observatory, Tautenburg. Observers S. Melnikov, F.
Ludwig, B. Stecklum. Measurer B. Stecklum. 1.34-m f/3 Schmidt + CCD.
291 LPL/Spacewatch II. Observer R. A. Mastaler. 1.8-m f/2.7 reflector + CCD.
691 Steward Observatory, Kitt Peak-Spacewatch. Observers R. A. Mastaler, M. T.
Read. 0.9-m f/3 reflector + CCD.
734 Farpoint Observatory, Eskridge. Observers G. Hug, D. Cromer, D. Goodin.
Measurer D. Cromer. 0.7-m reflector + CCD.
F52 Pan-STARRS 2, Haleakala. Observers J. Bulger, T. Dukes, T. Lowe, A.
Schultz, M. Willman. Measurers K. Chambers, S. Chastel, T. de Boer, L.
Denneau, J. Fairlamb, H. Flewelling, M. Huber, C.-C. Lin, E. Magnier, Y.
Ramanjooloo, R. Wainscoat, R. Weryk. 1.8-m Ritchey-Chretien + CCD.
H01 Magdalena Ridge Observatory, Socorro. Observers W. H. Ryan, E. V. Ryan.
Measurer W. H. Ryan. 2.4-m f/8.9 Ritchey-Chretien + CCD.
I52 Steward Observatory, Mt. Lemmon Station. Observer D. Rankin. 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.
L01 Visnjan Observatory, Tican. Observer K. Korlevic. 1.0-m f/2.9 reflector +
CCD.
First and last observations above in comparison with prediction:
Residuals in seconds of arc (or two decimals in degrees), reference and Delta-T
200119 691 0.50- 0.72- 200121 734 0.61- 0.57- MPO473495 -1.26 days
Orbital elements:
2018 CW13 Earth MOID = 0.0891 AU
Epoch 2020 May 31.0 TT = JDT 2459000.5 Veres
M 97.07276 (2000.0) P Q
n 0.48203500 Peri. 243.34268 +0.88748612 -0.27464450
a 1.6109559 Node 130.06267 +0.31880430 +0.94574658
e 0.7049118 Incl. 28.91510 -0.33276449 +0.17359092
P 2.04 H 20.0 G 0.15 U 5
Residuals in seconds of arc
180210 G96 0.2+ 0.5- 180223 I52 0.6- 0.3+ 200119 F52 0.0 0.1-
180210 G96 0.1+ 0.0 180223 I52 0.6- 0.2- 200119 F52 0.0 0.1-
180210 G96 0.2+ 0.4- 180223 I52 0.7- 0.5+ 200119 F52 0.0 0.1-
180210 G96 0.2+ 0.3- 200119 691 0.2- 0.9+ 200120 L01 0.1+ 0.3+
180210 I52 0.9+ 0.5+ 200119 691 0.0 0.3+ 200120 L01 0.5+ 0.1-
180210 I52 1.1+ 0.8+ 200119 691 0.2+ 0.1- 200120 L01 0.3- 0.5+
180210 I52 0.6+ 1.1+ 200119 291 0.2+ 0.2+ 200120 L01 0.3+ 0.6+
180210 L01 0.4- 0.0 200119 291 0.2+ 0.1+ 200120 691 0.1- 0.0
180210 L01 0.7- 0.4- 200119 291 0.1+ 0.1+ 200120 691 0.0 0.1+
180210 L01 0.2+ 0.8- 200119 H01 0.0 0.1- 200120 691 0.2+ 0.2+
180211 I52 0.2- 0.6- 200119 H01 0.0 0.2- 200121 033 0.2- 0.4-
180211 I52 1.0- 0.9- 200119 H01 0.0 0.1- 200121 033 0.2- 0.4-
180215 L01 0.1+ 0.3- 200119 H01 0.0 0.1- 200121 033 0.1- 0.6-
180216 L01 0.5- 0.5- 200119 I52 0.1- 0.3- 200121 033 0.2- 0.5-
180216 L01 0.8+ 0.7+ 200119 291 0.1+ 0.0 200121 033 0.2- 0.3-
180216 L01 0.0 1.0+ 200119 I52 0.0 0.2- 200121 033 0.2- 0.5-
180216 L01 0.5+ 0.8- 200119 I52 0.1- 0.0 200121 734 0.5- 0.4+
180218 F51 0.3+ 0.2- 200119 I52 0.1- 0.0 200121 734 0.4+ 0.1+
180218 F51 0.1- 0.3+ 200119 291 0.0 0.0 200121 734 0.0 0.1-
180223 I52 0.7- 0.2- 200119 291 0.1+ 0.1+ 200121 734 0.3- 0.5+
Ephemeris:
2018 CW13 a,e,i = 1.61, 0.70, 29 q = 0.4754
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2019 12 22 13 04 50.8 -28 23 49 0.4186 0.8922 65.1 89.7 21.0
...
2020 01 06 12 23 20.7 -10 44 03 0.3836 1.0871 95.2 64.3 20.4
...
2020 01 14 11 58 59.4 +00 07 47 0.3791 1.1855 113.3 49.6 20.1
...
2020 01 20 11 38 19.8 +08 28 37 0.3872 1.2565 127.2 38.6 20.0
2020 01 21 11 34 41.2 +09 50 29 0.3897 1.2682 129.5 36.8 20.0
2020 01 22 11 30 59.5 +11 11 25 0.3926 1.2797 131.8 35.0 19.9
...
2020 01 28 11 07 59.0 +18 47 42 0.4179 1.3475 144.7 25.0 19.9
...
2020 02 05 10 36 41.8 +27 01 01 0.4732 1.4343 157.5 15.3 20.0
...
2020 02 20 09 46 31.7 +35 47 05 0.6348 1.5865 154.9 15.3 20.9
A. U. Tomatic (C) Copyright 2020 MPC M.P.E.C. 2020-B55
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