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: 97TX8
# Created Wed Nov 27 02:07:53 2024
# Orbit generated from Bernstein formalism
# Fitting 12 observations of 12
# Arc: 23.80d
# First observation: 1997/10/05
# Last observation: 1997/10/29
Preliminary a, adot, b, bdot, g, gdot:
0.000001 0.058016 0.000001 -0.001405 0.035528 0.000000
# WARNING Fitting with energy constraint
# Chi-squared of fit: 16.69 DOF: 19 RMS: 0.21
# Min/Max residuals: -0.28 0.52
# Exact a, adot, b, bdot, g, gdot:
2.395706E-05 4.913937E-02 3.792682E-07 -2.076716E-03 3.407479E-02 -1.000214E-02
# Covariance matrix:
1.0439E-12 1.2294E-09 -1.8208E-14 9.1092E-11 2.1307E-10 -5.7483E-09
1.2294E-09 2.3757E-06 -3.8825E-11 1.7637E-07 4.0399E-07 -1.4589E-05
-1.8208E-14 -3.8825E-11 3.7557E-13 -9.0506E-12 -6.3823E-12 3.7607E-10
9.1092E-11 1.7637E-07 -9.0506E-12 1.3259E-08 2.9924E-08 -1.1276E-06
2.1307E-10 4.0399E-07 -6.3823E-12 2.9924E-08 6.9033E-08 -2.2768E-06
-5.7483E-09 -1.4589E-05 3.7607E-10 -1.1276E-06 -2.2768E-06 2.1711E-04
# lat0 lon0 xBary yBary zBary JD0
8.183394 -2.356152 -0.253104 0.136535 -0.950925 2450726.749201
# Heliocentric elements and errors
Epoch: 2450720.5000 = 1997/09/29
Mean Anomaly: 356.22188 +/- 5.778
Argument of Peri: 134.65298 +/- 33.729
Long of Asc Node: 250.28664 +/- 1.127
Inclination: 8.31702 +/- 0.054
Eccentricity: 0.68601516 +/- 0.2681
Semi-Major Axis: 92.24536634 +/- 66.9326
Time of Perihelion: 2454116.6673 +/- 3649.0
Perihelion: 28.96364643 +/- 32.4549
Aphelion: 155.52708625 +/- 115.5276
Period (y) 885.9823 +/- 964.29
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 30.00176480 +/- 0.2238
Ecliptic Y -0.98434138 +/- 0.0092
Ecliptic Z 4.17737851 +/- 0.0322
Ecliptic XDOT -0.00060465 +/- 0.0012
Ecliptic YDOT 0.00398445 +/- 0.0001
Ecliptic ZDOT -0.00027969 +/- 0.0002
# Distances at JD0 (AU)
Heliocenter to KBO 30.30718249 +/- 0.2216
Geocenter to KBO 29.34721187 +/- 0.2263
# Hcoef: 8.52
The following table shows the complete astrometric record for 97TX8. 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 (97TX8) followed by the observatory code and reference code for the source of the astrometry.
1997 10 05.24847 23 38 17.54 +06 34 10.5 22.6R 97TX8 675 Ca0060 1997 10 05.31566 23 38 17.17 +06 34 07.9 97TX8 675 Ca0060 1997 10 06.13400 23 38 12.87 +06 33 34.9 22.5R 97TX8 675 Ca0060 1997 10 06.14755 23 38 12.83 +06 33 34.5 97TX8 675 Ca0060 1997 10 25.84510 23 36 40.18 +06 20 24.7 97TX8 950 Ca0117 1997 10 26.02857 23 36 39.44 +06 20 17.6 97TX8 950 Ca0117 1997 10 27.95010 23 36 31.93 +06 19 04.4 23.4R 97TX8 950 Ca0117 1997 10 27.99852 23 36 31.73 +06 19 02.6 23.4R 97TX8 950 Ca0117 1997 10 28.03883 23 36 31.60 +06 19 01.3 23.2R 97TX8 950 Ca0117 1997 10 28.99441 23 36 27.98 +06 18 25.2 97TX8 950 Ca0117 1997 10 29.01314 23 36 27.93 +06 18 24.5 97TX8 950 Ca0117 1997 10 29.05009 23 36 27.75 +06 18 23.3 97TX8 950 Ca0117
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 -0.24 0.00 -0.28
2 0.0002 -6.09 -0.27 -0.18 -0.11
3 0.0024 -78.02 0.02 -4.78 0.21
4 0.0025 -78.73 0.52 -4.91 0.16
5 0.0564 -1660.43 -0.10 -175.62 0.21
6 0.0569 -1673.39 0.04 -177.70 0.06
7 0.0622 -1805.31 -0.08 -199.89 -0.09
8 0.0623 -1808.77 -0.20 -200.34 -0.01
9 0.0624 -1811.06 0.26 -200.75 0.03
10 0.0650 -1874.98 -0.03 -212.19 -0.11
11 0.0651 -1875.95 0.27 -212.53 -0.24
12 0.0652 -1878.89 -0.19 -212.56 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.
97TX8 quality flag:0 Type: ERR2LARGE ERR2LARGE ERR2LARGE axisobj 0.000 0.000 0.000 ecceobj -1.000 -1.000 -1.000 incobj -1.000 -1.000 -1.000 qmin 0.000 0.000 0.000 qmax 0.000 0.000 0.000 amean 0.000 0.000 0.000 amin 0.000 0.000 0.000 amax 0.000 0.000 0.000 emean 0.000 0.000 0.000 emin 0.000 0.000 0.000 emax 0.000 0.000 0.000 imean 0.000 0.000 0.000 imin 0.000 0.000 0.000 imax 0.000 0.000 0.000 excite_mean 0.000 0.000 0.000 fracstop 0.000 0.000 0.000 cjmean 0.000 0.000 0.000 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 0.0 0.0 0.0 kozaiamp 0.0 0.0 0.0