MPEC 1999-O36: 1999 KR16, 1999 KS16
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M.P.E.C. 1999-O36 Issued 1999 July 30, 22:58 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.
BMARSDEN@CFA.HARVARD.EDU or GWILLIAMS@CFA.HARVARD.EDU
URL http://cfa-www.harvard.edu/iau/mpc.html ISSN 1523-6714
1999 KR16, 1999 KS16
Observations:
J99K16R*5C1999 05 16.06755 13 31 25.61 -09 38 41.4 809
J99K16R 5C1999 05 16.96971 13 31 21.98 -09 38 13.5 21.3 R 809
J99K16R 5C1999 05 17.01077 13 31 21.81 -09 38 12.1 809
J99K16R 5C1999 05 17.05760 13 31 21.63 -09 38 10.8 809
J99K16R 5C1999 05 17.11468 13 31 21.40 -09 38 09.1 809
J99K16R 5C1999 05 17.16571 13 31 21.20 -09 38 07.7 21.3 R 809
J99K16R 5C1999 05 17.21628 13 31 20.99 -09 38 06.2 809
J99K16R 5C1999 05 17.27549 13 31 20.75 -09 38 04.3 809
J99K16S*5C1999 05 16.06755 13 32 09.34 -09 36 38.6 23.5 R 809
J99K16S 5C1999 05 17.01077 13 32 05.54 -09 36 17.0 809
J99K16S 5C1999 05 17.05760 13 32 05.37 -09 36 16.1 809
J99K16S 5C1999 05 17.11468 13 32 05.17 -09 36 15.0 23.7 R 809
J99K16S 5C1999 05 17.16571 13 32 04.97 -09 36 14.2 809
J99K16S 5C1999 05 17.21628 13 32 04.78 -09 36 13.5 809
Observer details:
809 European Southern Observatory, La Silla. Observers A. Delsanti,
O. R. Hainaut. Measurer O. R. Hainaut. 2.2-m reflector + CCD.
Orbital elements:
Object H G Epoch M Peri. Node Incl. e a Arc C
J99K16R 5.7 0.15 J9952 282.617 103.308 205.589 28.291 0.22724 39.33350 1EM
J99K16S 7.8 0.15 J9952 274.439 294.130 25.847 3.545 0.25756 39.28946 1EM
Ephemerides:
1999 KR16 a,e,i = 39.33, 0.23, 28 q = 30.395
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
1999 07 21 13 29.67 -09 20.5 39.398 39.347 86.4 1.5 21.8
1999 07 31 13 29.97 -09 21.0 39.558 39.340 76.9 1.4 21.9
1999 08 10 13 30.41 -09 22.5 39.712 39.334 67.4 1.4 21.9
1999 08 20 13 30.99 -09 24.7 39.856 39.328 58.0 1.2 21.9
1999 08 30 13 31.71 -09 27.8 39.984 39.322 48.5 1.1 21.8
1999 09 09 13 32.53 -09 31.4 40.093 39.315 39.0 0.9 21.8
1999 KS16 a,e,i = 39.29, 0.26, 4 q = 29.170
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
1999 07 21 13 30.32 -09 26.9 41.058 41.009 86.5 1.4 24.1
1999 07 31 13 30.58 -09 28.6 41.218 41.003 77.1 1.4 24.1
1999 08 10 13 30.99 -09 31.1 41.372 40.996 67.6 1.3 24.1
1999 08 20 13 31.53 -09 34.4 41.514 40.989 58.1 1.2 24.1
1999 08 30 13 32.19 -09 38.4 41.642 40.983 48.7 1.1 24.1
1999 09 09 13 32.96 -09 43.0 41.752 40.976 39.2 0.9 24.1
The assumed 2:3 Neptune-resonance orbital elements above keep these
objects 21 and 18 AU, respectively, from Neptune over a 14 000-year period.
On the other hand, it seems rather likely that 1995 GA7 = 1999 KS16, in which
case the best-fit solution gives a = 131 AU, e = 0.78, i = 1.2 deg. Further
observations are very desirable!
Brian G. Marsden (C) Copyright 1999 MPC M.P.E.C. 1999-O36
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