The following information shows the result of the orbit fit based on Gary Bernstein's method. Most of the information should be self-explanatory. Take special note that while the original Bernstein software works with barycentric coordinates, we convert these results into a heliocentric coordinate system.
# Object: 99OG4 # Created Sat Apr 20 01:09:58 2024 # Orbit generated from Bernstein formalism # Fitting 18 observations of 18 # Arc: 2.02y # First observation: 1999/07/20 # Last observation: 2001/07/27 Preliminary a, adot, b, bdot, g, gdot: -0.000043 0.019396 -0.000003 -0.000442 0.021303 0.000000 # Chi-squared of fit: 118.07 DOF: 30 RMS: 0.45 # Min/Max residuals: -1.08 1.03 # Exact a, adot, b, bdot, g, gdot: 1.672156E-05 1.946984E-02 -3.166324E-06 -4.443137E-04 2.158427E-02 2.750373E-03 # Covariance matrix: 3.7166E-13 -2.6995E-14 8.5705E-16 -3.6570E-15 9.0800E-13 4.0255E-12 -2.6995E-14 1.3757E-12 5.6018E-15 -3.2004E-14 1.5955E-12 3.6468E-11 8.5705E-16 5.6018E-15 1.8895E-13 -1.1732E-13 9.1987E-15 1.6733E-13 -3.6570E-15 -3.2004E-14 -1.1732E-13 1.2912E-13 -4.6978E-14 -9.4622E-13 9.0800E-13 1.5955E-12 9.1987E-15 -4.6978E-14 5.6064E-12 5.2894E-11 4.0255E-12 3.6468E-11 1.6733E-13 -9.4622E-13 5.2894E-11 1.0771E-09 # lat0 lon0 xBary yBary zBary JD0 -0.558136 -45.691828 0.303883 -0.009663 -0.967284 2451379.938273 # Heliocentric elements and errors Epoch: 2451370.5000 = 1999/07/11 Mean Anomaly: 83.94844 +/- 0.193 Argument of Peri: 103.76116 +/- 0.134 Long of Asc Node: 111.30017 +/- 0.017 Inclination: 1.41973 +/- 0.001 Eccentricity: 0.13013535 +/- 0.0016 Semi-Major Axis: 47.14945935 +/- 0.0201 Time of Perihelion: 2423794.9836 +/- 61.1 Perihelion: 41.01364792 +/- 0.0784 Aphelion: 53.28527078 +/- 0.0797 Period (y) 323.7601 +/- 0.21 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 32.82746467 +/- 0.0035 Ecliptic Y -34.05435043 +/- 0.0036 Ecliptic Z -0.45143257 +/- 0.0001 Ecliptic XDOT 0.00200711 +/- 0.0000 Ecliptic YDOT 0.00148436 +/- 0.0000 Ecliptic ZDOT -0.00005971 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 47.30269560 +/- 0.0036 Geocenter to KBO 46.33002678 +/- 0.0051 # Hcoef: 7.75
The following table shows the complete astrometric record for 99OG4. The first three columns show the date of observation. The next six columns are RA and DEC. The next column (when provided) is the observed magnitude and filter. The next column is the object name (99OG4) followed by the observatory code and reference code for the source of the astrometry.
1999 07 20.43753 21 07 46.42 -17 04 18.6 23.9R 99OG4 568 Ca7327 1999 07 20.47712 21 07 46.27 -17 04 18.8 99OG4 568 Ca7327 1999 07 20.50501 21 07 46.18 -17 04 19.4 99OG4 568 Ca7327 1999 08 09.35816 21 06 22.14 -17 10 33.3 24.0R 99OG4 675 Ca7327 1999 08 09.36561 21 06 22.10 -17 10 33.1 24.3R 99OG4 675 Ca7327 1999 08 09.39086 21 06 21.99 -17 10 33.6 24.4R 99OG4 675 Ca7327 1999 08 09.39830 21 06 21.95 -17 10 33.9 24.3R 99OG4 675 Ca7327 2000 08 03.13689 21 11 15.09 -16 50 43.3 24.3R 99OG4 809 Cb9102 2000 08 03.19255 21 11 14.84 -16 50 44.5 24.0R 99OG4 809 Cb9102 2000 08 03.22041 21 11 14.72 -16 50 44.9 24.0R 99OG4 809 Cb9102 2000 08 08.16523 21 10 53.56 -16 52 19.4 23.8R 99OG4 809 Cb9102 2000 08 08.21307 21 10 53.36 -16 52 21.1 23.9R 99OG4 809 Cb9102 2000 08 08.26056 21 10 53.15 -16 52 22.1 24.1R 99OG4 809 Cb9102 2001 06 27.30744 21 18 01.32 -16 21 28.9 99OG4 304 Cd2765 2001 07 25.57906 21 16 18.64 -16 29 34.6 99OG4 568 Cd2765 2001 07 27.53970 21 16 10.55 -16 30 11.8 99OG4 568 Cd2765 2001 07 27.58526 21 16 10.36 -16 30 13.3 24.1R 99OG4 568 Cd2765 2001 07 27.61963 21 16 10.22 -16 30 13.8 24.1R 99OG4 568 Cd2765
The following table shows the residuals to the orbit fit. The first coumn is the point number. The second column is the time, in years, measured from the first observation. The third and fifth columns are the regularized positions used in the orbit fit. The fourth and sixth columns are the residuals, in arc seconds, for RA and Dec respectively.
1 0.0000 0.00 -0.51 0.00 0.59
2 0.0001 -2.12 -0.16 0.43 1.03
3 0.0002 -3.53 0.17 0.23 0.83
4 0.0545 -1264.92 0.13 -8.50 -1.08
5 0.0546 -1265.41 0.13 -8.14 -0.72
6 0.0546 -1267.06 0.13 -8.16 -0.75
7 0.0546 -1267.70 -0.02 -8.29 -0.87
8 1.0396 3101.68 0.08 -97.01 0.33
9 1.0397 3097.90 -0.08 -97.10 0.25
10 1.0398 3096.13 -0.02 -96.97 0.37
11 1.0533 2777.95 0.20 -97.77 0.84
12 1.0535 2774.70 0.08 -98.55 0.06
13 1.0536 2771.53 0.01 -98.61 -0.02
14 1.9380 9204.39 0.44 -168.59 0.22
15 2.0154 7646.74 -0.24 -185.53 -0.23
16 2.0208 7524.42 -0.04 -186.00 0.09
17 2.0209 7521.36 -0.20 -186.61 -0.53
18 2.0210 7519.29 -0.09 -186.48 -0.40
The following table comes from a 10My integration of the orbit of the object. Three columns are shown. The first column is the result of integrating the nominal orbit. The other two columns are based on clones of the nominal orbit that are +/- 3 sigma from the nominal orbit. If all three types agree then the classificiation is deemed secure. The basis for these calculations is described in more detail in AJ, 129, 1117 (2005). Any use made of these calculations should refer to and credit this publication and the Deep Ecliptic Survey Team.
99OG4 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 47.063 47.123 47.004 ecceobj 0.130 0.133 0.127 incobj 1.420 1.420 1.420 qmin 40.142 40.085 40.237 qmax 54.382 54.626 54.162 amean 47.067 47.129 47.006 amin 46.665 46.717 46.610 amax 47.517 47.599 47.461 emean 0.130 0.133 0.127 emin 0.117 0.120 0.114 emax 0.145 0.148 0.142 imean 0.610 0.623 0.602 imin 0.128 0.131 0.127 imax 0.946 0.973 0.932 excite_mean 0.130 0.133 0.128 fracstop 1.000 1.000 1.000 cjmean 3.119 3.118 3.119 libcent 0 -180.0 -180.0 -180.0 libamp 0 -180.0 -180.0 -180.0 libcent 1 -180.0 -180.0 -180.0 libamp 1 -180.0 -180.0 -180.0 libcent 2 -180.0 -180.0 -180.0 libamp 2 -180.0 -180.0 -180.0 libcent 3 -180.0 -180.0 -180.0 libamp 3 -180.0 -180.0 -180.0 libcent 4 -180.0 -180.0 -180.0 libamp 4 -180.0 -180.0 -180.0 kozaimean 184.4 184.6 183.8 kozaiamp 180.0 180.0 180.0