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: 98WX24 # Created Sun Dec 22 02:07:58 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 37 observations of 37 # Arc: 24.03y # First observation: 1998/11/18 # Last observation: 2022/11/28 # Chi-squared of fit: 99.58 DOF: 68 RMS: 0.29 # Min/Max residuals: -0.69 0.92 # Exact a, adot, b, bdot, g, gdot: 1.271229E-05 2.075867E-02 1.285184E-06 3.313228E-04 2.265940E-02 3.340638E-05 # Covariance matrix: 1.0429E-13 -1.8100E-14 3.8936E-16 -2.1036E-16 -2.6953E-14 -2.7197E-14 -1.8100E-14 7.8141E-15 -2.1167E-16 1.1559E-16 6.7763E-15 1.4968E-14 3.8936E-16 -2.1167E-16 7.8346E-14 -4.6135E-15 -1.1601E-16 -4.4110E-16 -2.1036E-16 1.1559E-16 -4.6135E-15 5.7058E-16 2.4311E-17 2.4271E-16 -2.6953E-14 6.7763E-15 -1.1601E-16 2.4311E-17 2.5382E-13 2.4155E-15 -2.7197E-14 1.4968E-14 -4.4110E-16 2.4271E-16 2.4155E-15 3.1463E-14 # lat0 lon0 xBary yBary zBary JD0 -0.116028 53.666591 -0.044768 -0.002218 -0.983453 2451135.885631 # Heliocentric elements and errors Epoch: 2451136.5000 = 1998/11/19 Mean Anomaly: 171.44481 +/- 0.030 Argument of Peri: 180.87520 +/- 0.020 Long of Asc Node: 60.80265 +/- 0.001 Inclination: 0.91905 +/- 0.000 Eccentricity: 0.03638121 +/- 0.0001 Semi-Major Axis: 43.55164673 +/- 0.0036 Time of Perihelion: 2401141.4341 +/- 10.6 Perihelion: 41.96718518 +/- 0.0044 Aphelion: 45.13610829 +/- 0.0046 Period (y) 287.4187 +/- 0.04 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 26.70183862 +/- 0.0006 Ecliptic Y 36.37017124 +/- 0.0008 Ecliptic Z -0.08930724 +/- 0.0000 Ecliptic XDOT -0.00201871 +/- 0.0000 Ecliptic YDOT 0.00149848 +/- 0.0000 Ecliptic ZDOT 0.00004000 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 45.11967660 +/- 0.0007 Geocenter to KBO 44.13183491 +/- 0.0010 # Hcoef: 6.67
The following table shows the complete astrometric record for 98WX24. 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 (98WX24) followed by the observatory code and reference code for the source of the astrometry.
1998 11 18.38490 03 25 15.39 +18 34 38.3 22.5R 98WX24 695 Ca3208 1998 11 18.45898 03 25 14.98 +18 34 37.1 98WX24 695 Ca3208 1998 11 26.33705 03 24 37.99 +18 32 23.6 22.8R 98WX24 695 Ca3208 1998 11 27.34580 03 24 33.32 +18 32 06.7 98WX24 695 Ca3208 1998 12 18.07999 03 23 04.16 +18 26 43.3 98WX24 950 Ca3608 1998 12 18.12219 03 23 04.03 +18 26 42.6 98WX24 950 Ca3608 1998 12 18.16236 03 23 03.87 +18 26 42.2 98WX24 950 Ca3608 1999 01 22.33679 03 21 31.54 +18 21 10.7 22.8R 98WX24 568 Ca5544 1999 01 23.37498 03 21 30.35 +18 21 07.4 98WX24 568 Ca5544 1999 10 07.42896 03 33 08.14 +19 03 46.2 98WX24 568 Ca7322 1999 10 07.48706 03 33 07.94 +19 03 45.5 98WX24 568 Ca7322 1999 10 07.62051 03 33 07.47 +19 03 43.9 98WX24 568 Ca7322 1999 10 09.58354 03 33 00.86 +19 03 21.1 23.0R 98WX24 568 Ca6740 1999 10 09.61509 03 33 00.70 +19 03 20.6 22.8R 98WX24 568 Ca6740 1999 10 10.51748 03 32 57.52 +19 03 09.6 22.7R 98WX24 568 Ca6740 1999 10 10.58385 03 32 57.32 +19 03 09.0 22.9R 98WX24 568 Ca6740 2000 11 28.28747 03 34 11.04 +19 08 43.0 22.8R 98WX24 695 Cc3588 2000 11 29.23117 03 34 06.63 +19 08 28.1 22.9R 98WX24 695 Cc3588 2000 11 29.29959 03 34 06.31 +19 08 26.8 22.8R 98WX24 695 Cc3588 2003 10 22.33777 03 51 48.18 +20 09 18.2 21.7R 98WX24 304 Ci9217 2003 10 22.34662 03 51 48.13 +20 09 18.0 98WX24 304 Ci9217 2003 10 23.27302 03 51 44.36 +20 09 07.1 22.8R 98WX24 304 Ci9217 2003 10 23.30439 03 51 44.24 +20 09 06.7 98WX24 304 Ci9217 2008 11 17.19471 04 14 37.62 +21 18 32.9 24.0R 98WX24 250 S~06AK 2008 11 17.20166 04 14 37.59 +21 18 32.8 98WX24 250 S~06AK 2008 11 17.20791 04 14 37.56 +21 18 32.7 98WX24 250 S~06AK 2008 11 17.21485 04 14 37.52 +21 18 32.7 98WX24 250 S~06AK 2008 12 22.27277 04 11 50.31 +21 11 34.2 22.6r 98WX24 695 C~0hkJ 2008 12 22.36040 04 11 49.93 +21 11 33.1 22.8r 98WX24 695 C~0hkJ 2017 12 20.33598 04 57 42.369 +22 54 55.53 22.9R 98WX24 G37 C~2Uuz 2017 12 20.40743 04 57 41.995 +22 54 55.09 98WX24 G37 C~2Uuz 2017 12 20.45824 04 57 41.748 +22 54 54.50 98WX24 G37 C~2Uuz 2018 12 09.384130 05 03 47.00 +23 04 35.5 23.3r 98WX24 568 C~2rbJ 2018 12 09.445690 05 03 46.69 +23 04 35.1 23.5r 98WX24 568 C~2rbJ 2018 12 09.498500 05 03 46.41 +23 04 34.6 23.4r 98WX24 568 C~2rbJ 2022 11 28.404580 05 25 25.548 +23 32 18.75 23.5G 98WX24 G37 C~66vt 2022 11 28.453890 05 25 25.299 +23 32 18.39 98WX24 G37 C~66vt
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 0.43 0.00 -0.12
2 0.0002 0.00 -0.40 0.00 -0.04
3 0.0218 0.00 0.34 0.00 0.24
4 0.0245 0.00 0.47 0.00 0.26
5 0.0813 0.00 -0.64 0.00 -0.46
6 0.0814 0.00 -0.12 0.00 -0.56
7 0.0815 0.00 -0.19 0.00 -0.39
8 0.1778 0.00 0.09 0.00 0.11
9 0.1807 0.00 0.16 0.00 0.92
10 0.8844 0.00 -0.48 0.00 -0.12
11 0.8846 0.00 -0.50 0.00 -0.17
12 0.8850 0.00 -0.69 0.00 -0.22
13 0.8903 0.00 0.78 0.00 0.07
14 0.8904 0.00 0.06 0.00 -0.05
15 0.8929 0.00 -0.24 0.00 -0.14
16 0.8931 0.00 0.36 0.00 0.07
17 2.0285 0.00 0.04 0.00 0.10
18 2.0311 0.00 -0.04 0.00 0.20
19 2.0313 0.00 0.02 0.00 -0.02
20 4.9253 0.00 0.76 0.00 -0.05
21 4.9253 0.00 0.55 0.00 -0.14
22 4.9278 0.00 -0.20 0.00 0.12
23 4.9279 0.00 -0.06 0.00 0.10
24 9.9981 0.00 -0.17 0.00 0.12
25 9.9981 0.00 -0.12 0.00 0.11
26 9.9981 0.00 -0.12 0.00 0.08
27 9.9982 0.00 -0.22 0.00 0.16
28 10.0941 0.00 -0.17 0.00 0.08
29 10.0944 0.00 -0.08 0.00 -0.04
30 19.0882 0.00 0.28 0.00 0.03
31 19.0884 0.00 -0.02 0.00 0.12
32 19.0885 0.00 0.04 0.00 -0.09
33 20.0575 0.00 -0.04 0.00 0.04
34 20.0577 0.00 0.06 0.00 0.05
35 20.0578 0.00 -0.06 0.00 -0.10
36 24.0274 0.00 0.03 0.00 -0.03
37 24.0276 0.00 -0.06 0.00 -0.20
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.
98WX24 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.644 43.644 43.644 ecceobj 0.034 0.034 0.034 incobj 0.921 0.921 0.921 qmin 40.960 40.960 40.961 qmax 45.937 45.938 45.935 amean 43.361 43.361 43.361 amin 43.033 43.033 43.032 amax 43.708 43.708 43.708 emean 0.033 0.033 0.033 emin 0.016 0.016 0.016 emax 0.051 0.051 0.051 imean 1.268 1.268 1.268 imin 0.310 0.310 0.310 imax 1.930 1.930 1.930 excite_mean 0.041 0.041 0.041 fracstop 1.000 1.000 1.000 cjmean 3.092 3.092 3.092 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 162.0 162.0 162.0 kozaiamp 179.9 179.9 180.0