MPEC 2001-Y40: 1998 BG9
The following Minor Planet Electronic Circular may be linked-to from your own Web pages, but must not otherwise be redistributed electronically.
Read MPEC 2001-Y39
Read MPEC 2001-Y41
M.P.E.C. 2001-Y40 Issued 2001 Dec. 24, 17:22 UT
The Minor Planet Electronic Circulars contain information on unusual
minor planets and routine data on comets. They are published
on behalf of Commission 20 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 http://cfa-www.harvard.edu/iau/mpc.html ISSN 1523-6714
1998 BG9
Revision to MPEC 1998-B19
Observations:
J98B09G C2001 12 23.36460 08 59 20.92 +01 16 22.4 17.7 R 699
J98B09G C2001 12 23.38881 08 59 26.66 +01 17 03.8 699
J98B09G C2001 12 23.41305 08 59 32.37 +01 17 45.3 699
J98B09G C2001 12 23.43733 08 59 38.08 +01 18 27.0 699
J98B09G C2001 12 23.92779 09 01 40.57 +01 32 28.0 611
J98B09G C2001 12 23.93303 09 01 41.59 +01 32 39.1 611
J98B09G C2001 12 23.93473 09 01 42.11 +01 32 42.0 611
J98B09G C2001 12 23.93660 09 01 42.35 +01 32 45.2 611
J98B09G C2001 12 23.99630 09 01 56.79 +01 34 29.6 046
J98B09G C2001 12 23.99645 09 01 56.84 +01 34 30.1 118
J98B09G C2001 12 24.00028 09 01 57.77 +01 34 37.1 17.0 R 118
J98B09G C2001 12 24.00332 09 01 58.48 +01 34 42.9 118
J98B09G C2001 12 24.00338 09 01 58.47 +01 34 41.3 046
J98B09G C2001 12 24.00425 09 01 58.70 +01 34 43.8 046
J98B09G C2001 12 24.00521 09 01 58.99 +01 34 45.0 17.0 R 046
J98B09G C2001 12 24.41686 09 03 40.22 +01 46 57.4 18.5 R 918
J98B09G C2001 12 24.42061 09 03 41.15 +01 47 04.1 18.5 R 918
J98B09G C2001 12 24.42499 09 03 42.20 +01 47 12.3 18.3 R 918
J98B09G C2001 12 24.42774 09 03 42.62 +01 47 19.9 17.3 R 649
J98B09G C2001 12 24.43264 09 03 43.77 +01 47 28.7 17.3 R 649
J98B09G C2001 12 24.43425 09 03 44.16 +01 47 31.5 17.4 R 649
Observer details:
046 Klet. Observers M. Kocer, M. Kocherova. 0.57-m f/5.2 reflector + CCD.
118 Modra. Observers A. Galad, L. Kornos. 0.6-m f/5.5 reflector + CCD.
611 Starkenburg. Observers M. Busch, R. Stoss. 0.45-m f/4.4 reflector + CCD.
649 Powell Observatory, Louisburg. Observers K. Smalley, R. Fredrick.
0.75-m Newtonian + CCD.
699 Lowell Observatory-LONEOS. Observer M. E. Van Ness. 0.59-m
LONEOS Schmidt + CCD.
918 Badlands Observatory, Quinn. Observer R. Dyvig. 0.66-m f/4.8 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
011223 699 0.41- 0.04- 011224 649 0.41- 0.04- MPC 31593 +0.11 day
Orbital elements:
1998 BG9
Epoch 2001 Oct. 18.0 TT = JDT 2452200.5 MPC
M 339.43428 (2000.0) P Q
n 0.24658597 Peri. 1.00374 -0.44704400 -0.87111544
a 2.5185880 Node 115.57647 +0.81912058 -0.48995934
e 0.5367314 Incl. 13.02213 +0.35943447 +0.03313218
P 4.00 H 19.5 G 0.15 U 1
Residuals in seconds of arc
980124 566 0.3+ 1.0- 980129 104 1.5+ 0.3- 980221 118 0.1- 0.5+
980124 566 0.2+ 0.9- 980129 104 1.4+ 0.6- 980221 557 0.7+ 0.2+
980124 566 0.5+ 0.9- 980129 104 1.7+ 0.2- 980221 557 0.1+ 0.0
980125 566 0.0 0.4- 980130 900 0.9- 0.4- 980221 360 0.3- 0.3+
980125 566 0.0 0.5- 980130 900 0.8+ 0.1+ 980221 360 0.1- 0.4+
980125 566 0.1+ 0.3- 980131 355 1.5+ 0.2- 980221 360 0.3- 0.0
980125 566 0.0 0.1+ 980131 355 0.7+ 0.7- 980227 557 0.7+ 0.2-
980125 566 0.1+ 0.1- 980131 355 1.2+ 0.2+ 980227 557 0.2+ 0.1-
980125 566 0.1- 0.3- 980201 046 0.3+ 0.3- 980302 360 0.4+ 0.2-
980125 557 0.0 0.6- 980201 046 0.5+ 0.2- 980302 360 0.5+ 0.2+
980125 557 0.1- 0.3- 980201 046 0.4+ 0.3- 980302 360 0.2- 0.1+
980126 673 0.4- 1.4- 980201 422 0.0 0.2- 980302 587 0.3- 0.2-
980126 673 0.5- 1.0- 980201 422 0.2+ 0.0 980302 587 0.2+ 0.1+
980126 673 1.2- 1.2- 980201 422 0.3- 1.0- 980317 658 1.3- 0.3-
980126 566 0.4- 0.1- 980201 557 0.4+ 0.6+ 980317 658 0.8- 0.3-
980126 566 0.1+ 0.2+ 980201 557 0.3+ 0.1+ 980317 658 0.1- 0.2-
980126 566 0.1- 0.0 980201 557 1.0+ 0.4+ 980329 658 0.9- 0.6-
980126 897 1.0- 0.9- 980204 118 0.1- 0.6+ 980329 658 0.8- 1.0-
980126 897 0.1- 1.0- 980204 118 0.2+ 0.6+ 980329 658 1.0- 0.9-
980126 897 0.7- 1.0- 980204 046 0.1+ 0.6+ 011223 699 0.6- 0.6+
980126 897 1.4- 0.1+ 980204 046 0.0 0.7+ 011223 699 0.1+ 0.7+
980126 566 0.2- 0.3+ 980204 046 0.1- 0.5+ 011223 699 0.2+ 0.8+
980126 566 0.5- 0.1- 980204 360 0.0 0.8+ 011223 699 0.3+ 0.9+
980126 566 1.0- 0.1- 980204 360 0.2+ 0.8+ 011223 611 (2.7+ 1.0-)
980126 046 0.5- 0.3- 980204 360 0.0 0.6+ 011223 611 1.1- 0.9+
980126 046 0.6- 0.4- 980204 587 0.1+ 0.6+ 011223 611 0.6+ 0.8+
980126 046 0.3- 0.6- 980204 587 0.5+ 1.3+ 011223 611 (2.6- 0.7+)
980126 046 0.2- 0.3- 980205 118 0.2- 0.8+ 011223 046 0.5- 0.1-
980128 046 0.6- 0.2+ 980205 118 0.1- 1.0+ 011223 118 0.6+ 0.1-
980128 046 0.9- 0.1- 980205 587 0.8- 0.7+ 011224 118 0.8+ 0.2+
980128 046 0.6- 0.0 980205 587 0.3- 0.7+ 011224 118 0.5+ 0.6+
980128 557 0.4+ 0.4+ 980205 587 0.1+ 0.1+ 011224 046 0.8- 0.9-
980128 557 0.1- 0.2- 980206 118 0.3- 1.5+ 011224 046 0.4- 0.1+
980128 566 0.1- 0.1+ 980206 118 0.0 1.8+ 011224 046 0.5+ 0.4-
980128 566 0.1+ 0.1+ 980210 046 0.3+ 0.2- 011224 918 0.5- 0.7-
980128 566 0.5- 0.5+ 980210 046 0.2+ 0.8- 011224 918 0.0 0.7-
980128 422 0.2- 1.3+ 980210 046 0.5+ 0.5- 011224 918 0.1+ 0.3-
980128 422 0.4- 0.4+ 980219 557 0.2+ 0.4+ 011224 649 0.1+ 0.0
980128 422 0.4+ 0.2+ 980219 046 0.3+ 0.6+ 011224 649 0.1- 0.0
980129 360 0.8+ 0.3- 980219 046 0.4+ 0.7+ 011224 649 0.0 0.1-
980129 360 0.9+ 0.3- 980219 046 0.2+ 0.4+
980129 360 0.8+ 0.5- 980221 118 0.4- 0.7+
Ephemeris:
1998 BG9 a,e,i = 2.52, 0.54, 13 q = 1.1668
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2001 12 17 08 34.12 -01 17.1 0.295 1.198 130.7 38.5 18.8
2001 12 22 08 53.78 +00 39.1 0.275 1.186 132.3 37.8 18.6
2001 12 27 09 14.49 +03 08.9 0.258 1.177 133.9 37.0 18.4
2002 01 01 09 36.03 +06 11.3 0.245 1.171 135.6 36.0 18.3
2002 01 06 09 57.98 +09 41.6 0.236 1.167 137.2 34.9 18.1
2002 01 11 10 19.77 +13 31.2 0.231 1.167 138.6 33.9 18.1
2002 01 16 10 40.76 +17 28.8 0.231 1.169 139.8 32.9 18.0
2002 01 21 11 00.33 +21 22.0 0.234 1.175 140.7 32.1 18.1
2002 01 26 11 17.95 +24 59.9 0.241 1.183 141.3 31.3 18.1
2002 01 31 11 33.21 +28 15.2 0.252 1.193 141.9 30.7 18.2
2002 02 05 11 45.83 +31 04.4 0.265 1.207 142.3 30.0 18.3
2002 02 10 11 55.73 +33 25.9 0.282 1.223 142.7 29.3 18.5
2002 02 15 12 02.99 +35 19.7 0.300 1.241 143.1 28.5 18.6
2002 02 25 12 10.75 +37 47.1 0.344 1.284 143.8 27.1 18.9
2002 03 07 12 11.98 +38 38.1 0.397 1.333 143.9 26.0 19.3
2002 03 17 12 09.86 +38 07.3 0.459 1.389 143.0 25.6 19.7
2002 03 27 12 07.31 +36 31.3 0.531 1.449 140.9 25.8 20.1
2002 04 06 12 06.12 +34 09.6 0.614 1.512 137.7 26.5 20.5
2002 04 16 12 07.06 +31 19.1 0.709 1.578 133.6 27.4 21.0
2002 04 26 12 10.33 +28 13.2 0.815 1.645 128.9 28.4 21.4
2002 05 06 12 15.69 +25 01.9 0.933 1.714 123.8 29.3 21.8
Brian G. Marsden (C) Copyright 2001 MPC M.P.E.C. 2001-Y40
Read MPEC 2001-Y39
Read MPEC 2001-Y41
Our Web policy. Index to the CBAT/MPC/ICQ pages.
