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: 97RX9
# Created Fri Nov 22 02:07:55 2024
# Orbit generated from Bernstein formalism
# Fitting 22 observations of 22
# Arc: 2.92y
# First observation: 1997/09/07
# Last observation: 2000/08/08
Preliminary a, adot, b, bdot, g, gdot:
-0.000115 0.020160 0.000011 -0.011583 0.023853 0.000000
# Chi-squared of fit: 100.80 DOF: 38 RMS: 0.38
# Min/Max residuals: -0.86 0.79
# Exact a, adot, b, bdot, g, gdot:
1.012359E-05 2.018464E-02 -1.141142E-05 -1.165050E-02 2.428430E-02 1.215199E-03
# Covariance matrix:
2.2522E-13 -7.3409E-13 -4.1782E-14 2.9400E-13 1.9868E-13 -8.4585E-12
-7.3409E-13 5.2622E-12 3.2356E-13 -2.2788E-12 -1.2308E-12 6.5546E-11
-4.1782E-14 3.2356E-13 1.5251E-13 -1.9141E-13 -6.8779E-14 4.0855E-12
2.9400E-13 -2.2788E-12 -1.9141E-13 1.0384E-12 4.8130E-13 -2.8785E-11
1.9868E-13 -1.2308E-12 -6.8779E-14 4.8130E-13 7.3584E-13 -1.3869E-11
-8.4585E-12 6.5546E-11 4.0855E-12 -2.8785E-11 -1.3869E-11 8.2784E-10
# lat0 lon0 xBary yBary zBary JD0
0.010807 -16.143900 -0.017584 -0.000020 -0.999143 2450698.787871
# Heliocentric elements and errors
Epoch: 2450690.5000 = 1997/08/30
Mean Anomaly: 94.89152 +/- 0.596
Argument of Peri: 78.98836 +/- 0.541
Long of Asc Node: 163.89488 +/- 0.000
Inclination: 29.90418 +/- 0.001
Eccentricity: 0.05357264 +/- 0.0012
Semi-Major Axis: 41.87574051 +/- 0.0181
Time of Perihelion: 2424600.9194 +/- 163.0
Perihelion: 39.63234653 +/- 0.0513
Aphelion: 44.11913449 +/- 0.0519
Period (y) 270.9892 +/- 0.18
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 40.52730145 +/- 0.0014
Ecliptic Y -11.71477987 +/- 0.0004
Ecliptic Z 0.00732226 +/- 0.0000
Ecliptic XDOT 0.00076898 +/- 0.0000
Ecliptic YDOT 0.00215532 +/- 0.0000
Ecliptic ZDOT -0.00131361 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 42.18647039 +/- 0.0013
Geocenter to KBO 41.17886370 +/- 0.0015
# Hcoef: 8.24
The following table shows the complete astrometric record for 97RX9. 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 (97RX9) followed by the observatory code and reference code for the source of the astrometry.
1997 09 07.28714 23 00 29.42 -06 20 24.2 24.0R 97RX9 675 Ca0021 1997 09 07.43086 23 00 28.78 -06 20 29.2 97RX9 675 Ca0021 1997 09 08.25432 23 00 25.13 -06 20 57.9 97RX9 675 Ca0021 1997 09 08.33580 23 00 24.77 -06 21 00.9 97RX9 675 Ca0021 1997 10 05.15420 22 58 32.74 -06 35 45.8 97RX9 675 Ca0021 1997 10 05.22851 22 58 32.47 -06 35 48.6 24.5R 97RX9 675 Ca0021 1997 10 05.29484 22 58 32.21 -06 35 50.9 23.5R 97RX9 675 Ca0021 1997 10 06.15200 22 58 29.04 -06 36 17.2 97RX9 675 Ca0021 1997 10 06.16369 22 58 28.99 -06 36 17.5 24.5R 97RX9 675 Ca0021 1997 10 06.17683 22 58 28.94 -06 36 18.1 97RX9 675 Ca0021 1998 06 29.49523 23 09 33.10 -05 58 22.0 97RX9 568 Ca1698 1998 06 29.57919 23 09 33.03 -05 58 22.8 97RX9 568 Ca1698 1998 06 30.54541 23 09 32.01 -05 58 37.0 97RX9 568 Ca1698 2000 07 28.36931 23 19 05.54 -06 27 53.3 24.2R 97RX9 309 Cb7395 2000 07 28.37487 23 19 05.53 -06 27 53.5 24.2R 97RX9 309 Cb7395 2000 07 28.38641 23 19 05.49 -06 27 53.8 24.2R 97RX9 309 Cb7395 2000 07 29.36039 23 19 02.62 -06 28 20.6 24.0R 97RX9 309 Cb7395 2000 07 29.36594 23 19 02.61 -06 28 20.7 97RX9 309 Cb7395 2000 07 29.37150 23 19 02.59 -06 28 20.9 97RX9 309 Cb7395 2000 08 08.31487 23 18 29.97 -06 33 15.9 24.4R 97RX9 809 Cc2106 2000 08 08.35153 23 18 29.83 -06 33 17.2 24.1R 97RX9 809 Cc2106 2000 08 08.39696 23 18 29.66 -06 33 18.8 24.4R 97RX9 809 Cc2106
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 0.62 0.00 0.79
2 0.0004 -10.73 0.67 -0.95 0.72
3 0.0026 -72.00 0.19 -6.52 0.64
4 0.0029 -78.10 0.20 -7.23 0.44
5 0.0763 -1959.68 -0.03 -183.14 0.58
6 0.0765 -1964.47 -0.04 -184.18 -0.00
7 0.0767 -1968.93 -0.25 -184.82 -0.24
8 0.0790 -2022.65 -0.23 -191.00 -0.76
9 0.0791 -2023.45 -0.29 -190.99 -0.68
10 0.0791 -2024.37 -0.38 -191.26 -0.86
11 0.8082 7993.48 -0.43 -1914.66 -0.41
12 0.8085 7992.21 -0.00 -1914.99 -0.17
13 0.8111 7972.64 -0.26 -1922.17 -0.41
14 2.8887 15188.16 -0.25 -6894.12 0.00
15 2.8887 15187.94 -0.18 -6894.24 -0.08
16 2.8887 15187.27 -0.25 -6894.28 -0.03
17 2.8914 15137.12 0.12 -6902.10 0.18
18 2.8914 15136.94 0.24 -6902.13 0.19
19 2.8914 15136.59 0.18 -6902.20 0.17
20 2.9186 14570.52 0.28 -6982.22 0.08
21 2.9187 14568.07 0.12 -6982.60 -0.02
22 2.9188 14565.10 -0.04 -6983.07 -0.16
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.
97RX9 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 41.787 41.841 41.735 ecceobj 0.050 0.054 0.047 incobj 29.930 29.928 29.932 qmin 38.809 38.789 38.917 qmax 44.572 44.768 44.421 amean 41.616 41.675 41.566 amin 41.306 41.361 41.257 amax 41.949 42.000 41.893 emean 0.051 0.054 0.049 emin 0.039 0.044 0.038 emax 0.064 0.066 0.060 imean 29.309 29.309 29.309 imin 29.015 29.003 29.008 imax 29.618 29.621 29.627 excite_mean 0.492 0.493 0.492 fracstop 1.000 1.000 1.000 cjmean 2.772 2.772 2.772 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 187.2 188.4 186.3 kozaiamp 180.0 180.0 179.9