MPEC 2001-U61: 2001 UA17, 2001 UB17, 2001 UC17
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-U60
Read MPEC 2001-U62
M.P.E.C. 2001-U61 Issued 2001 Oct. 26, 22:07 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
2001 UA17, 2001 UB17, 2001 UC17
Observations:
K01U17A* C2001 10 17.13088 01 33 04.78 +08 40 37.2 809
K01U17A C2001 10 17.24099 01 33 04.24 +08 40 34.4 809
K01U17A FC2001 10 18.11576 01 32 59.99 +08 40 11.1 809
K01U17A C2001 10 18.22664 01 32 59.45 +08 40 08.0 22.2 R 809
K01U17A C2001 10 18.30250 01 32 59.09 +08 40 06.2 809
K01U17B* C2001 10 17.14116 01 32 32.72 +08 11 02.1 809
K01U17B FC2001 10 17.25245 01 32 32.11 +08 10 58.7 809
K01U17B C2001 10 18.09833 01 32 27.74 +08 10 34.3 809
K01U17B FC2001 10 18.21608 01 32 27.12 +08 10 31.3 809
K01U17B C2001 10 18.29202 01 32 26.73 +08 10 28.7 23.2 R 809
K01U17B C2001 10 18.31336 01 32 26.59 +08 10 28.3 809
K01U17C* C2001 10 17.16274 01 32 05.23 +06 46 56.5 809
K01U17C C2001 10 17.27628 01 32 04.60 +06 46 52.6 809
K01U17C C2001 10 18.07605 01 32 00.21 +06 46 26.6 809
K01U17C C2001 10 18.18551 01 31 59.57 +06 46 22.9 22.5 R 809
K01U17C FC2001 10 18.25983 01 31 59.17 +06 46 20.3 809
Observer details:
809 European Southern Observatory, La Silla. Observers O. R. Hainaut,
D. Kinoshita. Measurer O. R. Hainaut. 2.20-m f/8 reflector + CCD.
Orbital elements:
Object H G Epoch M Peri. Node Incl. e a Arc C
K01U17A 6.6 0.15 K01AI 0.004 350.976 33.684 6.043 0.07054 42.91529 1EM
K01U17B 8.0 0.15 K01AI 0.004 344.287 40.069 4.967 0.06754 39.63570 1EM
K01U17C 7.6 0.15 K01AI 0.004 240.032 143.812 2.962 0.14541 39.59974 1EM
Ephemerides:
2001 UA17 a,e,i = 42.92, 0.07, 6 q = 39.888
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2001 10 18 01 33.01 +08 40.2 38.892 39.888 179.0 0.0 22.6
2001 10 28 01 32.21 +08 35.9 38.910 39.888 169.8 0.3 22.6
2001 11 07 01 31.43 +08 31.7 38.958 39.888 159.7 0.5 22.7
2001 11 17 01 30.72 +08 27.9 39.034 39.888 149.4 0.7 22.7
2001 11 27 01 30.09 +08 24.7 39.137 39.888 139.2 0.9 22.7
2001 12 07 01 29.57 +08 22.1 39.262 39.888 128.9 1.1 22.7
2001 12 17 01 29.19 +08 20.3 39.408 39.888 118.6 1.2 22.8
2001 12 27 01 28.95 +08 19.5 39.567 39.888 108.4 1.3 22.8
2002 01 06 01 28.87 +08 19.6 39.737 39.888 98.2 1.4 22.8
2002 01 16 01 28.96 +08 20.6 39.910 39.888 88.0 1.4 22.8
2002 01 26 01 29.21 +08 22.6 40.083 39.888 77.9 1.4 22.8
2002 02 05 01 29.62 +08 25.5 40.249 39.888 67.9 1.3 22.8
2002 02 15 01 30.17 +08 29.2 40.404 39.888 57.9 1.2 22.8
2002 02 25 01 30.86 +08 33.7 40.544 39.888 48.0 1.1 22.8
2002 03 07 01 31.66 +08 38.8 40.664 39.888 38.2 0.9 22.8
2001 UB17 a,e,i = 39.64, 0.07, 5 q = 36.959
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2001 10 18 01 32.47 +08 10.6 35.963 36.959 178.6 0.0 23.6
2001 10 28 01 31.61 +08 05.9 35.982 36.959 169.5 0.3 23.7
2001 11 07 01 30.78 +08 01.4 36.030 36.959 159.3 0.5 23.7
2001 11 17 01 30.02 +07 57.4 36.107 36.959 149.1 0.8 23.8
2001 11 27 01 29.35 +07 54.0 36.211 36.959 138.8 1.0 23.8
2001 12 07 01 28.81 +07 51.3 36.337 36.959 128.5 1.2 23.8
2001 12 17 01 28.40 +07 49.5 36.483 36.959 118.2 1.3 23.8
2001 12 27 01 28.16 +07 48.7 36.643 36.959 108.0 1.5 23.9
2002 01 06 01 28.09 +07 48.9 36.813 36.959 97.8 1.5 23.9
2002 01 16 01 28.19 +07 50.2 36.986 36.959 87.6 1.5 23.9
2002 01 26 01 28.47 +07 52.5 37.159 36.959 77.6 1.5 23.9
2002 02 05 01 28.92 +07 55.7 37.325 36.959 67.5 1.4 23.9
2002 02 15 01 29.53 +07 59.9 37.479 36.959 57.6 1.3 23.9
2002 02 25 01 30.28 +08 04.8 37.618 36.959 47.7 1.1 23.9
2002 03 07 01 31.15 +08 10.4 37.737 36.959 37.9 0.9 23.9
2001 UC17 a,e,i = 39.60, 0.15, 3 q = 33.842
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2001 10 18 01 32.01 +06 46.5 32.846 33.842 177.2 0.1 22.9
2001 10 28 01 31.10 +06 41.1 32.867 33.842 168.6 0.3 22.9
2001 11 07 01 30.22 +06 36.1 32.917 33.842 158.5 0.6 22.9
2001 11 17 01 29.41 +06 31.7 32.996 33.842 148.3 0.9 23.0
2001 11 27 01 28.71 +06 28.0 33.101 33.842 138.1 1.1 23.0
2001 12 07 01 28.14 +06 25.2 33.229 33.842 127.8 1.3 23.0
2001 12 17 01 27.73 +06 23.4 33.375 33.842 117.5 1.5 23.1
2001 12 27 01 27.49 +06 22.7 33.536 33.842 107.3 1.6 23.1
2002 01 06 01 27.44 +06 23.2 33.706 33.842 97.1 1.7 23.1
2002 01 16 01 27.58 +06 24.8 33.879 33.842 87.0 1.7 23.1
2002 01 26 01 27.91 +06 27.5 34.051 33.842 76.9 1.6 23.1
2002 02 05 01 28.43 +06 31.2 34.216 33.842 66.9 1.5 23.1
2002 02 15 01 29.11 +06 35.9 34.370 33.842 57.0 1.4 23.1
2002 02 25 01 29.95 +06 41.5 34.507 33.842 47.2 1.2 23.1
2002 03 07 01 30.93 +06 47.7 34.625 33.842 37.4 1.0 23.1
The assumed perihelic 2:3 Neptune-resonance orbits keep 2001 UB17 and
2001 UC17 at least 11 and 14 AU, respectively, from Neptune over a 14 000-year
period. It is possible, though unlikely, that 1993 RP = 2001 UB17, in which
case the object would have a = 33 AU, e = 0.27, i = 6.5 deg.
Brian G. Marsden (C) Copyright 2001 MPC M.P.E.C. 2001-U61
Read MPEC 2001-U60
Read MPEC 2001-U62
Our Web policy. Index to the CBAT/MPC/ICQ pages.
