MPEC 2017-W111: 2009 BL71
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M.P.E.C. 2017-W111 Issued 2017 Nov. 24, 17:23 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
2009 BL71
Revision to MPEC 2009-B89
Additional Observations:
K09B71L C2017 11 23.51948 14 10 26.85 +53 19 43.6 20.1 RoEW111926
K09B71L C2017 11 23.52181 14 10 26.44 +53 20 11.1 19.3 RoEW111926
K09B71L C2017 11 23.52415 14 10 26.01 +53 20 38.4 19.4 RoEW111926
K09B71L C2017 11 24.52590 14 07 46.25 +56 29 42.3 20.2 RoEW111926
K09B71L C2017 11 24.52801 14 07 45.81 +56 30 06.9 18.7 RoEW111926
K09B71L C2017 11 24.53010 14 07 45.38 +56 30 31.4 18.8 RoEW111926
K09B71L C2017 11 24.53237 14 07 44.95 +56 30 58.1 19.4 RoEW111926
K09B71L C2017 11 24.53481 14 07 44.45 +56 31 26.9 18.6 RoEW111926
K09B71L C2017 11 24.53725 14 07 43.95 +56 31 55.4 19.4 RoEW111926
Observer details:
926 Tenagra II Observatory. Observers M. Schwartz, P. R. Holvorcem. Measurer
M. Schwartz. 0.81-m f/7 Ritchey-Chretien + CCD.
First and last observations above in comparison with prediction:
Residuals in seconds of arc (or two decimals in degrees), reference and Delta-T
171123 926 2.49+ 0.22+ 171124 926 2.44+ 0.37+ MPO156168 +0.23 day
Orbital elements:
2009 BL71 PHA, Earth MOID = 0.0100 AU
Epoch 2017 Sept. 4.0 TT = JDT 2458000.5 MPC
M 355.80842 (2000.0) P Q
n 1.08727492 Peri. 292.40842 +0.64181537 +0.76629959
a 0.9366481 Node 17.61710 -0.66318406 +0.57381900
e 0.2656720 Incl. 5.55382 -0.38504537 +0.28899256
P 0.91 H 22.0 G 0.15 U 4
Residuals in seconds of arc
090130 703 0.7+ 0.0 090130 B04 0.0 0.2+ 090224 H55 0.4- 0.3+
090130 703 (1.7+ 0.4+) 090130 587 0.0 0.4+ 090224 H55 0.8- 0.5+
090130 703 1.1- 0.7+ 090130 587 0.2- 1.1+ 090315 H55 0.2- 0.4+
090130 703 (1.2+ 2.5+) 090130 587 0.3- 0.2+ 090315 H55 0.7- 0.3+
090130 703 0.5+ 0.6+ 090131 204 0.4- 0.3+ 090315 H55 0.9- 0.5+
090130 703 0.8+ 0.4+ 090131 204 0.4- 0.1+ 171123 926 0.2+ 0.0
090130 703 0.3- 1.1+ 090131 204 0.5- 0.3+ 171123 926 0.0 0.1-
090130 703 0.2+ 1.3+ 090206 J95 0.2+ 0.9- 171123 926 0.3- 0.4-
090130 493 0.1+ 0.1+ 090206 J95 0.4+ 1.1- 171124 926 0.2+ 0.3+
090130 493 0.0 0.2+ 090207 J95 0.2- 0.5- 171124 926 0.0 0.1+
090130 493 0.0 0.2+ 090214 704 (1.1+ 1.7+) 171124 926 0.1- 0.0
090130 611 0.0 0.3+ 090214 704 0.2+ 0.4+ 171124 926 0.1+ 0.0
090130 611 0.9+ 1.3+ 090214 704 0.8+ 0.2+ 171124 926 0.0 0.1+
090130 B04 0.3- 0.5+ 090214 704 (0.4- 1.5+) 171124 926 0.1- 0.0
090130 B04 0.0 0.4+ 090224 H55 0.2- 0.4+
Ephemeris:
2009 BL71 a,e,i = 0.94, 0.27, 6 q = 0.6878
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2017 10 25 14 37 53.6 -09 10 08 0.1659 0.8317 10.3 167.6 32.5
...
2017 11 09 14 29 59.7 +12 58 04 0.1010 0.9049 30.4 146.3 24.6
...
2017 11 17 14 21 41.1 +33 16 26 0.08299 0.9431 54.6 121.3 21.4
...
2017 11 23 14 11 31.2 +51 41 33 0.07820 0.9708 75.4 100.1 20.0
2017 11 24 14 09 02.7 +54 50 35 0.07817 0.9753 78.9 96.6 19.9
2017 11 25 14 06 10.5 +57 58 35 0.07835 0.9797 82.3 93.2 19.7
...
2017 12 01 13 28 36.1 +75 34 47 0.08374 1.0058 101.2 74.1 19.2
...
2017 12 09 05 07 08.6 +83 09 53 0.1004 1.0383 119.6 55.6 19.1
...
2017 12 24 03 22 42.9 +61 49 28 0.1513 1.0914 132.4 41.7 19.7
A. U. Tomatic (C) Copyright 2017 MPC M.P.E.C. 2017-W111
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