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: 99CG154
# Created Mon Apr 28 01:08:02 2025
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 15 observations of 15
# Arc: 6.08y
# First observation: 1999/02/11
# Last observation: 2005/03/10
# Chi-squared of fit: 92.53 DOF: 24 RMS: 0.44
# Min/Max residuals: -0.83 0.71
# Exact a, adot, b, bdot, g, gdot:
1.349211E-05 1.974052E-02 -3.391422E-06 2.370180E-04 2.216005E-02 -1.284393E-03
# Covariance matrix:
4.9146E-13 2.6809E-13 6.8093E-16 3.5878E-15 1.1101E-12 2.4126E-12
2.6809E-13 2.4435E-12 -5.4566E-15 2.9998E-14 3.5782E-12 1.9987E-11
6.8093E-16 -5.4566E-15 1.9768E-13 -3.5861E-14 -4.5011E-15 -4.5327E-14
3.5878E-15 2.9998E-14 -3.5861E-14 1.3202E-14 4.3740E-14 2.4672E-13
1.1101E-12 3.5782E-12 -4.5011E-15 4.3740E-14 6.9848E-12 2.9200E-11
2.4126E-12 1.9987E-11 -4.5327E-14 2.4672E-13 2.9200E-11 1.6437E-10
# lat0 lon0 xBary yBary zBary JD0
0.373969 128.452642 -0.239766 0.006074 -0.964093 2451220.801793
# Heliocentric elements and errors
Epoch: 2451220.5000 = 1999/02/11
Mean Anomaly: 220.91207 +/- 0.393
Argument of Peri: 173.55814 +/- 0.369
Long of Asc Node: 100.64129 +/- 0.013
Inclination: 0.77694 +/- 0.000
Eccentricity: 0.09246011 +/- 0.0003
Semi-Major Axis: 42.94320899 +/- 0.0158
Time of Perihelion: 2490932.9883 +/- 117.5
Perihelion: 38.97267532 +/- 0.0183
Aphelion: 46.91374266 +/- 0.0206
Period (y) 281.4168 +/- 0.15
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -28.84145370 +/- 0.0033
Ecliptic Y 35.94423435 +/- 0.0042
Ecliptic Z 0.29438041 +/- 0.0000
Ecliptic XDOT -0.00181287 +/- 0.0000
Ecliptic YDOT -0.00163209 +/- 0.0000
Ecliptic ZDOT 0.00002825 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 46.08586992 +/- 0.0039
Geocenter to KBO 45.12632018 +/- 0.0054
# Hcoef: 7.38
The following table shows the complete astrometric record for 99CG154. 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 (99CG154) followed by the observatory code and reference code for the source of the astrometry.
1999 02 11.30105 08 43 54.98 +18 30 40.3 23.4R 99CG154 568 Ca4208 1999 02 11.34301 08 43 54.77 +18 30 40.9 23.4R 99CG154 568 Ca4208 1999 02 11.38316 08 43 54.59 +18 30 41.6 23.4R 99CG154 568 Ca4208 1999 03 14.35297 08 41 53.68 +18 38 19.6 23.4R 99CG154 568 Ca4208 1999 03 14.38705 08 41 53.58 +18 38 19.8 23.4R 99CG154 568 Ca4208 2000 04 05.26554 08 45 37.11 +18 24 44.5 24.1R 99CG154 568 Cb1943 2000 04 05.38182 08 45 36.96 +18 24 44.9 24.1R 99CG154 568 Cb1943 2000 04 07.30404 08 45 34.41 +18 24 54.0 24.1R 99CG154 568 Cb1943 2000 04 07.37797 08 45 34.32 +18 24 54.1 24.1R 99CG154 568 Cb1943 2005 03 10.194618 09 09 42.52 +16 49 14.5 99CG154 645 C~1dbz 2005 03 10.195451 09 09 42.52 +16 49 14.5 99CG154 645 C~1dbz 2005 03 10.197940 09 09 42.51 +16 49 14.5 99CG154 645 C~1dbz 2005 03 10.240174 09 09 42.32 +16 49 14.0 99CG154 645 C~1dbz 2005 03 10.241007 09 09 42.32 +16 49 14.0 99CG154 645 C~1dc0 2005 03 10.243495 09 09 42.31 +16 49 14.0 99CG154 645 C~1dc0
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 0.33 0.00 0.68
2 0.0001 0.00 0.06 0.00 0.54
3 0.0002 0.00 0.13 0.00 0.54
4 0.0850 0.00 -0.03 0.00 0.19
5 0.0851 0.00 0.07 0.00 0.01
6 1.1471 0.00 -0.22 0.00 -0.41
7 1.1474 0.00 0.10 0.00 -0.59
8 1.1526 0.00 -0.32 0.00 -0.61
9 1.1528 0.00 -0.23 0.00 -0.83
10 6.0750 0.00 0.22 0.00 0.71
11 6.0750 0.00 0.27 0.00 0.69
12 6.0750 0.00 0.25 0.00 0.66
13 6.0751 0.00 -0.24 0.00 -0.51
14 6.0751 0.00 -0.19 0.00 -0.52
15 6.0751 0.00 -0.21 0.00 -0.56
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.
99CG154 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.059 43.059 43.059 ecceobj 0.090 0.090 0.090 incobj 0.778 0.778 0.778 qmin 38.405 38.427 38.412 qmax 48.090 48.136 48.148 amean 43.103 43.105 43.106 amin 42.734 42.744 42.747 amax 43.480 43.520 43.501 emean 0.084 0.084 0.084 emin 0.057 0.057 0.057 emax 0.106 0.106 0.107 imean 2.117 2.117 2.117 imin 0.800 0.800 0.800 imax 3.172 3.180 3.176 excite_mean 0.093 0.093 0.093 fracstop 1.000 1.000 1.000 cjmean 3.080 3.080 3.080 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 180.9 180.8 180.9 kozaiamp 180.0 180.0 180.0