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: 69990
# Created Sun Dec 22 02:06:49 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 32 observations of 32
# Arc: 19.11y
# First observation: 1998/11/18
# Last observation: 2017/12/26
# Chi-squared of fit: 44.93 DOF: 58 RMS: 0.21
# Min/Max residuals: -0.66 0.47
# Exact a, adot, b, bdot, g, gdot:
1.904326E-05 3.719730E-02 -2.564258E-06 -4.250618E-03 3.157963E-02 2.949476E-03
# Covariance matrix:
0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
# lat0 lon0 xBary yBary zBary JD0
0.887310 49.477982 -0.112212 0.014904 -0.977955 2451135.641301
# Heliocentric elements and errors
Epoch: 2451136.5000 = 1998/11/19
Mean Anomaly: 20.54120 +/- 0.000
Argument of Peri: 141.97801 +/- 0.000
Long of Asc Node: 237.16022 +/- 0.000
Inclination: 6.56733 +/- 0.000
Eccentricity: 0.19302440 +/- 0.0000
Semi-Major Axis: 39.55408570 +/- 0.0000
Time of Perihelion: 2445951.9782 +/- 0.0
Perihelion: 31.91918199 +/- 0.0000
Aphelion: 47.18898941 +/- 0.0000
Period (y) 248.7684 +/- 0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 21.13031725 +/- 0.0000
Ecliptic Y 24.88430298 +/- 0.0000
Ecliptic Z 0.49031508 +/- 0.0000
Ecliptic XDOT -0.00228218 +/- 0.0000
Ecliptic YDOT 0.00230314 +/- 0.0000
Ecliptic ZDOT -0.00036454 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 32.64898167 +/- 0.0000
Geocenter to KBO 31.66596845 +/- 0.0000
# Hcoef: 7.95
The following table shows the complete astrometric record for 69990. 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 (69990) followed by the observatory code and reference code for the source of the astrometry.
1998 11 18.14057 03 07 05.71 +18 27 14.7 23.0R 69990 695 a3608 1998 11 18.20979 03 07 05.27 +18 27 13.0 69990 695 a3608 1998 11 18.39543 03 07 04.13 +18 27 08.1 69990 695 a3608 1998 12 18.00434 03 04 20.44 +18 14 29.6 23.2R 69990 950 a3608 1998 12 18.04473 03 04 20.21 +18 14 28.7 69990 950 a3608 1999 01 22.23449 03 02 42.55 +18 05 32.1 23.0R 69990 568 Ca5545 1999 01 23.25650 03 02 41.89 +18 05 25.2 69990 568 Ca5545 1999 10 06.56854 03 20 04.86 +19 04 06.5 69990 568 Ca6740 1999 10 09.54166 03 19 51.25 +19 03 10.2 69990 568 Ca6740 1999 10 09.57817 03 19 51.07 +19 03 09.6 69990 568 Ca6740 1999 10 11.57167 03 19 41.51 +19 02 30.2 23.3R 69990 568 Ca6740 1999 10 11.61914 03 19 41.27 +19 02 29.2 23.1R 69990 568 Ca6740 2002 01 31.03554 03 28 43.00 +19 01 02.1 21.3 69990 304 Cf1458 2002 01 31.06297 03 28 42.98 +19 01 02.0 69990 304 Cf1458 2003 10 22.34087 03 54 06.32 +19 59 13.5 23.2R 69990 304 Ci9217 2003 10 22.35028 03 54 06.27 +19 59 13.3 69990 304 Ci9217 2003 10 23.24590 03 54 01.66 +19 58 57.1 23.1R 69990 304 Ci9217 2003 10 23.29138 03 54 01.38 +19 58 56.0 69990 304 Ci9217 2003 10 24.32014 03 53 56.09 +19 58 37.3 23.2R 69990 304 Ci9217 2003 10 24.35301 03 53 55.90 +19 58 36.7 69990 304 Ci9217 2005 09 01.36332 04 13 17.40 +20 26 48.1 22.8R 69990 250 S~06Fv 2005 09 01.42759 04 13 17.46 +20 26 48.0 69990 250 S~06Fv 2005 09 01.43431 04 13 17.46 +20 26 48.0 69990 250 S~06Fv 2017 03 24.23316 05 32 13.579 +20 12 24.00 69990 568 C 2017 11 17.44833 05 47 35.199 +20 07 23.51 23.8w 69990 568 C~2WuY 2017 11 21.50945 05 47 14.159 +20 06 57.99 23.7w 69990 568 C~2WuY 2017 11 21.51340 05 47 14.136 +20 06 57.96 23.6w 69990 568 C~2WuY 2017 12 16.33457 05 44 48.781 +20 04 46.94 23.8w 69990 568 C~2WuY 2017 12 16.40193 05 44 48.343 +20 04 46.46 23.2w 69990 568 C~2WuY 2017 12 23.33469 05 44 05.609 +20 04 19.01 23.6w 69990 568 C~2WuY 2017 12 23.34903 05 44 05.520 +20 04 18.99 23.7w 69990 568 C~2WuY 2017 12 26.33777 05 43 47.231 +20 04 08.56 23.9w 69990 568 C~2WuY
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 -0.11 0.00 0.06
2 0.0002 0.00 -0.25 0.00 0.24
3 0.0007 0.00 0.01 0.00 0.45
4 0.0818 0.00 -0.04 0.00 0.00
5 0.0819 0.00 -0.66 0.00 0.01
6 0.1782 0.00 -0.21 0.00 0.16
7 0.1810 0.00 -0.08 0.00 0.14
8 0.8828 0.00 0.05 0.00 0.04
9 0.8909 0.00 0.35 0.00 -0.21
10 0.8910 0.00 0.29 0.00 -0.10
11 0.8965 0.00 0.12 0.00 -0.25
12 0.8966 0.00 0.06 0.00 -0.28
13 3.2030 0.00 0.35 0.00 0.09
14 3.2031 0.00 0.25 0.00 0.10
15 4.9259 0.00 0.38 0.00 0.04
16 4.9260 0.00 0.36 0.00 0.01
17 4.9284 0.00 0.03 0.00 -0.03
18 4.9285 0.00 -0.57 0.00 -0.30
19 4.9314 0.00 0.47 0.00 -0.20
20 4.9315 0.00 0.25 0.00 -0.19
21 6.7877 0.00 -0.23 0.00 0.12
22 6.7879 0.00 -0.10 0.00 0.12
23 6.7879 0.00 -0.18 0.00 0.13
24 18.3466 0.00 0.09 0.00 0.00
25 18.9988 0.00 0.08 0.00 -0.03
26 19.0099 0.00 0.04 0.00 0.00
27 19.0099 0.00 0.01 0.00 -0.00
28 19.0779 0.00 0.13 0.00 0.22
29 19.0781 0.00 -0.11 0.00 0.02
30 19.0970 0.00 0.03 0.00 -0.01
31 19.0971 0.00 0.03 0.00 0.02
32 19.1053 0.00 -0.01 0.00 -0.03
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.
69990 quality flag:3 Type: 3:2E 3:2E 3:2E axisobj 39.629 39.629 39.629 ecceobj 0.194 0.194 0.194 incobj 6.559 6.559 6.559 qmin 31.400 31.399 31.401 qmax 48.106 48.134 48.100 amean 39.457 39.457 39.457 amin 38.965 38.965 38.984 amax 40.008 40.019 40.006 emean 0.187 0.187 0.187 emin 0.169 0.168 0.169 emax 0.203 0.203 0.203 imean 7.940 7.942 7.939 imin 7.339 7.326 7.334 imax 8.638 8.638 8.637 excite_mean 0.232 0.232 0.232 fracstop 1.000 1.000 1.000 cjmean 2.990 2.990 2.990 libcent 0 180.0 180.8 180.2 libamp 0 103.5 103.9 102.9 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 167.0 167.3 166.8 kozaiamp 180.0 180.0 180.0