[Iaude] MPEC X50: 2013 BT18 [a=0.77,e=0.56,i=1.8,H=23.4]
mpec at mpcdb1.cfa.harvard.edu
mpec at mpcdb1.cfa.harvard.edu
Thu Dec 6 13:39:19 EST 2018
M.P.E.C. 2018-X50 Issued 2018 Dec. 6, 18:36 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 at CFA.HARVARD.EDU
URL https://www.minorplanetcenter.net/ ISSN 1523-6714
2013 BT18
Revision to MPEC 2013-B46
Additional Observations:
K13B18T C2013 01 22.44508007 42 55.408+10 07 28.25 19.1 GVEX050F51
K13B18T C2015 01 18.24343405 28 00.715+15 52 07.11 21.3 GVEX050F51
K13B18T C2015 01 19.37432905 20 34.637+15 55 56.33 20.9 GVEX050F51
K13B18T C2015 01 19.37567505 20 34.078+15 55 56.54 21.3 GVEX050F51
K13B18T C2015 01 20.23772605 15 09.198+15 58 22.59 21.9 GVEX050F51
K13B18T C2015 01 20.26481105 14 58.724+15 58 27.52 21.1 GVEX050F51
K13B18T C2015 01 24.34285104 51 35.889+16 05 51.14 21.5 GVEX050F51
K13B18T C2015 01 24.35734104 51 31.128+16 05 51.94 22.0 GVEX050F51
K13B18T C2015 01 24.37187304 51 26.393+16 05 52.67 23.0 GVEX050F51
K13B18T C2018 12 06.44350 04 57 27.77 +01 43 36.0 19.8 cVEX050T05
K13B18T C2018 12 06.45252 04 57 19.70 +01 44 01.8 19.0 cVEX050T05
K13B18T C2018 12 06.46088 04 57 12.32 +01 44 23.7 18.6 cVEX050T05
K13B18T C2018 12 06.46983 04 57 04.47 +01 44 46.6 19.9 cVEX050T05
K13B18T KC2018 12 06.58877 04 55 24.42 +01 51 36.4 19.1 GVEX050474
K13B18T KC2018 12 06.58968 04 55 23.63 +01 51 38.9 18.8 GVEX050474
K13B18T KC2018 12 06.59059 04 55 22.86 +01 51 41.1 19.1 GVEX050474
K13B18T C2018 12 06.59100 04 55 19.52 +01 50 09.6 18.7 oVEX050T08
K13B18T C2018 12 06.59146 04 55 19.13 +01 50 11.2 19.1 oVEX050T08
K13B18T KC2018 12 06.59150 04 55 22.08 +01 51 43.8 19.2 GVEX050474
K13B18T C2018 12 06.59192 04 55 18.66 +01 50 11.7 18.8 oVEX050T08
K13B18T C2018 12 06.59238 04 55 18.30 +01 50 15.4 19.2 oVEX050T08
K13B18T C2018 12 06.59330 04 55 17.52 +01 50 16.0 18.8 oVEX050T08
K13B18T C2018 12 06.59376 04 55 17.09 +01 50 17.8 18.7 oVEX050T08
Observer details:
474 Mount John Observatory, Lake Tekapo. Observers A. C. Gilmore,
P. M. Kilmartin. Measurer P. M. Kilmartin. 1.0-m f/7.7 reflector + CCD.
F51 Pan-STARRS 1, Haleakala. Observers J. Bulger, K. Chambers, T. Lowe,
E. Magnier, A. Schultz, M. Willman. Measurers S. Chastel, M. Huber,
Y. Ramanjooloo, R. Wainscoat, R. Weryk. 1.8-m Ritchey-Chretien + CCD.
T05 ATLAS-HKO, Haleakala. Observers L. Denneau, H. Flewelling, A. Heinze,
H. Weiland, J. Tonry. Measurers L. Denneau, H. Flewelling, A. Heinze,
J. Tonry, A. Fitzsimmons, D. Young, N. Erasmus. 0.5-m f/2.0 Schmidt +
CCD.
T08 ATLAS-MLO, Mauna Loa. Observers L. Denneau, H. Flewelling, A. Heinze,
H. Weiland, J. Tonry. Measurers L. Denneau, H. Flewelling, A. Heinze,
J. Tonry, A. Fitzsimmons, D. Young, N. Erasmus. 0.5-m f/2.0 Schmidt +
CCD.
First and last observations above in comparison with prediction:
Residuals in seconds of arc (or two decimals in degrees), reference and Delta-T
130122 F51 0.2+ 0.1- 181206 T08 0.40+ 0.10+ MPO265048 -0.052 day
Orbital elements:
2013 BT18 Earth MOID = 0.0149 AU
Epoch 2019 Apr. 27.0 TT = JDT 2458600.5 MPC
M 316.15727 (2000.0) P Q
n 1.45020742 Peri. 117.33921 +0.15829051 +0.98734122
a 0.7730056 Node 161.76012 -0.91690497 +0.15076756
e 0.5648518 Incl. 1.84393 -0.36637328 +0.04925912
P 0.68 H 23.4 G 0.15 U 4
Residuals in seconds of arc
130118 F51 0.0 0.2+ 130131 H36 0.9- 0.0 150120 F51 0.1- 0.3+
130118 F51 0.1+ 0.2+ 130131 H36 0.2+ 0.0 150120 F51 0.0 0.2+
130118 F51 0.2+ 0.3+ 130131 H36 (9.1+ 5.3-) 150124 F51 0.3+ 0.0
130119 H21 0.0 0.0 130201 291 0.4+ 0.3+ 150124 F51 0.1+ 0.1+
130119 H21 0.1+ 0.0 130201 291 0.0 0.1+ 150124 F51 0.4+ 0.2+
130119 H21 0.4+ 0.1+ 130201 568 0.2- 0.0 181206 T05 1.5+ 1.1-
130119 H21 0.1+ 0.2- 130201 568 0.1- 0.0 181206 T05 0.3- 0.5+
130120 807 0.4+ 0.3- 130202 291 0.1- 0.2+ 181206 T05 0.6- 0.1+
130120 807 0.1+ 0.0 130202 291 0.3- 0.0 181206 T05 0.3- 1.0-
130120 807 0.3+ 0.2+ 130206 291 0.3- 0.0 181206 474 0.2+ 0.1-
130120 807 0.4+ 0.1+ 130206 291 0.5- 0.0 181206 474 0.1+ 0.0
130120 807 0.2+ 0.1- 130206 291 0.4- 0.1+ 181206 474 0.2+ 0.2-
130122 H21 0.0 0.0 130208 291 0.3- 0.1+ 181206 T08 0.5+ 0.6-
130122 H21 0.1- 0.1+ 130208 291 0.8- 0.0 181206 T08 0.5+ 0.2-
130122 H21 0.5+ 0.5- 130208 291 0.3- 0.3+ 181206 474 0.2+ 0.1+
130122 F51 0.1+ 0.0 130209 568 0.2+ 0.0 181206 T08 0.7- 0.9-
130130 807 0.1- 0.4+ 130209 568 0.1+ 0.1- 181206 T08 0.2- 1.6+
130130 807 0.0 0.1- 130209 568 0.0 0.0 181206 T08 0.2- 0.2-
130130 807 0.3+ 0.1- 150118 F51 0.1- 0.2+ 181206 T08 0.7- 0.4+
130130 204 2.4- 0.1+ 150119 F51 0.1+ 0.1+
130130 204 0.1- 0.1+ 150119 F51 0.2- 0.1+
Ephemeris:
2013 BT18 a,e,i = 0.77, 0.56, 2 q = 0.3364
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2018 11 06 12 25 14.6 -10 55 03 0.1917 0.8391 33.9 138.8 26.1
...
2018 11 21 10 20 39.7 -10 26 20 0.09357 0.9729 78.1 96.5 21.7
...
2018 11 29 07 28 58.3 -05 36 00 0.07257 1.0308 126.1 50.7 19.6
...
2018 12 05 05 19 34.6 +00 34 38 0.08978 1.0686 156.6 21.4 19.4
2018 12 06 05 03 53.7 +01 23 48 0.09493 1.0744 158.6 19.5 19.4
2018 12 07 04 49 52.4 +02 08 14 0.1005 1.0801 159.6 18.6 19.5
...
2018 12 13 03 52 38.8 +05 17 11 0.1410 1.1115 152.5 24.1 20.5
...
2018 12 21 03 17 19.7 +07 38 48 0.2047 1.1463 139.1 34.2 21.7
...
2019 01 05 02 57 51.3 +10 25 11 0.3360 1.1908 120.8 45.2 23.1
A. U. Tomatic (C) Copyright 2018 MPC M.P.E.C. 2018-X50
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