MPEC 2004-O09 : 2004 NN8
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M.P.E.C. 2004-O09 Issued 2004 July 17, 02:00 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.
Supported in part by the Brinson Foundation
Prepared using the Tamkin Foundation Computer Network
MPC@CFA.HARVARD.EDU
URL http://cfa-www.harvard.edu/iau/mpc.html ISSN 1523-6714
2004 NN8
Observations:
K04N08N* C2004 07 13.54125 20 56 03.53 -34 36 33.9 18.5 R EO009E12
K04N08N C2004 07 13.54925 20 56 01.31 -34 36 46.7 18.4 R EO009E12
K04N08N C2004 07 13.55721 20 55 59.10 -34 36 59.9 18.3 R EO009E12
K04N08N C2004 07 13.56522 20 55 56.92 -34 37 13.5 18.7 R EO009E12
K04N08N 1C2004 07 13.61565 20 55 42.79 -34 38 36.9 19.1 R EO009413
K04N08N 1C2004 07 13.61749 20 55 42.30 -34 38 39.6 18.9 R EO009413
K04N08N 1C2004 07 13.61934 20 55 41.80 -34 38 42.7 18.9 R EO009413
K04N08N 1C2004 07 13.62119 20 55 41.27 -34 38 45.8 18.9 R EO009413
K04N08N 1C2004 07 13.73375 20 55 09.84 -34 41 50.6 18.6 R EO009413
K04N08N 1C2004 07 13.74068 20 55 07.92 -34 42 02.1 18.6 R EO009413
K04N08N C2004 07 14.45574 20 51 48.35 -35 01 27.2 18.2 R EO009E14
K04N08N C2004 07 14.46553 20 51 45.61 -35 01 43.3 18.5 R EO009E14
K04N08N C2004 07 14.47392 20 51 43.28 -35 01 56.7 19.0 R EO009E14
K04N08N 1C2004 07 14.48956 20 51 38.81 -35 02 22.8 18.9 R EO009413
K04N08N 1C2004 07 14.49518 20 51 37.21 -35 02 32.0 18.8 R EO009413
K04N08N 1C2004 07 14.50073 20 51 35.64 -35 02 41.0 18.8 R EO009413
K04N08N C2004 07 14.51520 20 51 31.49 -35 03 04.8 18.5 R EO009422
K04N08N C2004 07 14.51612 20 51 31.23 -35 03 05.8 18.7 R EO009422
K04N08N C2004 07 14.51692 20 51 30.98 -35 03 07.6 18.7 R EO009422
K04N08N C2004 07 14.51782 20 51 30.79 -35 03 09.3 EO009422
K04N08N C2004 07 14.63311 20 50 57.82 -35 06 16.6 18.8 V EO009428
K04N08N C2004 07 14.63716 20 50 56.69 -35 06 22.6 18.7 V EO009428
K04N08N C2004 07 14.64125 20 50 55.48 -35 06 29.9 18.7 V EO009428
K04N08N 1C2004 07 14.72488 20 50 31.606-35 08 44.06 18.6 R EO009413
K04N08N 1C2004 07 14.73042 20 50 30.022-35 08 52.91 18.7 R EO009413
K04N08N 1C2004 07 14.83224 20 50 00.878-35 11 35.76 18.6 R EO009413
K04N08N 1C2004 07 14.83708 20 49 59.484-35 11 43.66 18.6 R EO009413
K04N08N C2004 07 15.31539 20 47 42.66 -35 24 36.1 18.2 R EO009711
K04N08N C2004 07 15.32129 20 47 40.96 -35 24 46.0 18.0 R EO009711
K04N08N IC2004 07 15.32719 20 47 39.28 -35 24 55.4 EO009711
K04N08N C2004 07 15.46356 20 47 00.15 -35 28 26.3 18.2 R EO009E14
K04N08N C2004 07 15.46912 20 46 58.52 -35 28 35.5 18.3 R EO009E14
K04N08N C2004 07 15.47485 20 46 56.85 -35 28 44.1 18.4 R EO009E14
K04N08N 1C2004 07 15.47740 20 46 56.153-35 28 48.54 18.8 R EO009413
K04N08N 1C2004 07 15.74215 20 45 38.668-35 35 48.75 18.8 R EO009413
K04N08N 1C2004 07 15.75452 20 45 35.043-35 36 08.16 18.8 R EO009413
K04N08N C2004 07 16.39340 20 42 27.99 -35 52 47.8 EO009474
K04N08N C2004 07 16.39757 20 42 26.63 -35 52 54.7 18.1 R EO009474
K04N08N C2004 07 16.39873 20 42 26.46 -35 52 55.7 18.0 R EO009474
K04N08N C2004 07 16.40093 20 42 25.74 -35 52 59.8 18.4 R EO009474
K04N08N C2004 07 16.43430 20 42 15.87 -35 53 51.4 18.5 R EO009E14
K04N08N C2004 07 16.44264 20 42 13.40 -35 54 05.4 18.5 R EO009E14
K04N08N C2004 07 16.45098 20 42 10.92 -35 54 18.6 18.4 R EO009E14
K04N08N 1C2004 07 16.54757 20 41 42.136-35 56 49.70 18.6 R EO009413
K04N08N 1C2004 07 16.55034 20 41 41.304-35 56 53.99 18.7 R EO009413
K04N08N 1C2004 07 16.83359 20 40 16.370-36 04 09.86 18.7 R EO009413
Observer details:
413 Siding Spring. Observer R. H. McNaught. 1.0-m f/8 reflector + CCD.
Object profile not differentiated from that of stars (July 14).
422 Loomberah. Observer G. J. Garradd. 0.45-m f/5.4 reflector + CCD.
428 Reedy Creek. Observer J. Broughton. 0.51-m f/3.6 reflector + CCD.
474 Mount John Observatory, Lake Tekapo. Observer A. C. Gilmore. Measurer
P. M. Kilmartin. 0.6-m f/6.4 reflector + CCD.
711 McDonald Observatory. Observer N. R. Baliber. Measurer J. G. Ries.
0.76-m reflector with prime focus corrector + CCD.
E12 Siding Spring Survey. Observers G. J. Garradd, S. Larson, E. Beshore,
E. Christensen, R. Hill, D. McLean. 0.5-m Uppsala Schmidt + CCD.
E14 Hunters Hill Observatory, Ngunnawal. Observer D. Higgins. Measurer
A. Engine. 0.36-m f/2.95 Schmidt-Cassegrain + CCD.
Orbital elements:
2004 NN8
Epoch 2004 July 14.0 TT = JDT 2453200.5 MPC
M 358.07128 (2000.0) P Q
n 0.01696520 Peri. 265.23455 -0.17907809 -0.98147186
a 15.0001876 Node 164.40836 -0.77187094 +0.18310850
e 0.8466537 Incl. 165.31275 -0.61003794 +0.05642924
P 58.1 H 15.3 G 0.15
From 46 observations 2004 July 13-16. E-assumed.
Ephemeris:
2004 NN8 a,e,i = 15.00, 0.85, 165 q = 2.3002
Date TT R. A. (2000) Decl. Delta r Elong. Phase V
2004 07 14 20 53.94 -34 49.1 1.610 2.582 158.2 8.4 19.0
2004 07 24 20 02.14 -38 45.9 1.556 2.537 160.9 7.5 18.8
2004 08 03 19 05.14 -40 51.9 1.583 2.496 147.0 12.8 19.0
2004 08 13 18 12.99 -40 56.8 1.684 2.458 129.7 18.5 19.3
2004 08 23 17 32.21 -39 44.8 1.840 2.424 113.2 22.5 19.6
2004 09 02 17 03.34 -38 06.4 2.029 2.394 98.4 24.6 19.9
2004 09 12 16 43.98 -36 31.0 2.232 2.367 85.0 25.1 20.1
2004 09 22 16 31.53 -35 10.3 2.437 2.345 72.8 24.1 20.2
2004 10 02 16 23.93 -34 06.5 2.632 2.327 61.5 22.2 20.3
While the retrograde nature of the orbit of 2004 NN8 is certain, the
size of the orbit is very poorly constrained. At one extreme, the orbit
could be parabolic (or even hyperbolic). At the other, orbits with
semimajor axes smaller than 4 AU are not excluded by the currently
available observations. The solution above is based on the assumption
that 2004 NN8 is similar to objects such as 1999 LE31 and (20461) Dioretsa.
Further observations are very much desired, as are observations with
large-aperture instruments to clarify the physical nature of this object.
The difference in plane-of-sky between the above solution and a parabolic
solution on Aug. 17 amounts to -0m.23 in R.A. and -1'.1 in Decl.
Gareth V. Williams (C) Copyright 2004 MPC M.P.E.C. 2004-O09
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