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: 98WV24 # Created Sun Dec 22 02:07:58 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 26 observations of 26 # Arc: 21.99y # First observation: 1998/11/18 # Last observation: 2020/11/14 # Chi-squared of fit: 94.10 DOF: 46 RMS: 0.34 # Min/Max residuals: -0.61 0.68 # Exact a, adot, b, bdot, g, gdot: 1.557711E-05 2.754445E-02 9.542653E-07 -5.602828E-04 2.684239E-02 7.622915E-04 # Covariance matrix: 1.4826E-13 -2.7845E-14 -9.0340E-16 4.3053E-16 -1.4367E-14 -3.1762E-14 -2.7845E-14 1.2046E-14 5.8288E-16 -2.2688E-16 -1.1739E-14 1.6575E-14 -9.0340E-16 5.8288E-16 9.8769E-14 -6.6862E-15 -1.4977E-15 8.7442E-16 4.3053E-16 -2.2688E-16 -6.6862E-15 1.0026E-15 2.5839E-16 -3.4036E-16 -1.4367E-14 -1.1739E-14 -1.4977E-15 2.5839E-16 1.6411E-13 -1.7606E-14 -3.1762E-14 1.6575E-14 8.7442E-16 -3.4036E-16 -1.7606E-14 2.4865E-14 # lat0 lon0 xBary yBary zBary JD0 -1.004733 43.532532 -0.212648 -0.017099 -0.961090 2451135.625531 # Heliocentric elements and errors Epoch: 2451136.5000 = 1998/11/19 Mean Anomaly: 51.50076 +/- 0.045 Argument of Peri: 164.71728 +/- 0.050 Long of Asc Node: 183.59447 +/- 0.002 Inclination: 1.51537 +/- 0.000 Eccentricity: 0.04360025 +/- 0.0000 Semi-Major Axis: 39.23928622 +/- 0.0025 Time of Perihelion: 2438292.7681 +/- 11.4 Perihelion: 37.52844368 +/- 0.0027 Aphelion: 40.95012877 +/- 0.0029 Period (y) 245.8045 +/- 0.02 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 27.56315788 +/- 0.0004 Ecliptic Y 26.47167181 +/- 0.0004 Ecliptic Z -0.65320025 +/- 0.0000 Ecliptic XDOT -0.00188002 +/- 0.0000 Ecliptic YDOT 0.00209877 +/- 0.0000 Ecliptic ZDOT -0.00005853 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 38.22174945 +/- 0.0004 Geocenter to KBO 37.25452631 +/- 0.0006 # Hcoef: 7.17
The following table shows the complete astrometric record for 98WV24. 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 (98WV24) followed by the observatory code and reference code for the source of the astrometry.
1998 11 18.12480 02 45 33.31 +14 56 32.1 22.6R 98WV24 695 Ca3208 1998 11 18.19378 02 45 32.96 +14 56 30.3 98WV24 695 Ca3208 1998 11 26.36618 02 44 51.70 +14 53 25.0 23.0R 98WV24 695 Ca3208 1998 11 27.35610 02 44 46.88 +14 53 03.1 98WV24 695 Ca3208 1999 01 22.26272 02 42 07.48 +14 41 48.1 22.8R 98WV24 568 Ca5544 1999 01 23.30133 02 42 07.30 +14 41 48.6 98WV24 568 Ca5544 1999 09 08.55038 02 56 57.71 +15 46 05.0 98WV24 568 Ca7322 1999 09 08.60471 02 56 57.59 +15 46 04.4 98WV24 568 Ca7322 1999 10 10.50620 02 55 09.89 +15 37 31.7 23.3R 98WV24 568 Ca7322 1999 10 10.57244 02 55 09.58 +15 37 30.4 23.4R 98WV24 568 Ca7322 2000 11 23.19461 02 57 41.53 +15 46 06.5 21.8R 98WV24 695 Cc2190 2000 11 23.39344 02 57 40.49 +15 46 02.5 98WV24 695 Cc2190 2002 12 04.20899 03 09 27.50 +16 31 19.1 22.2R 98WV24 662 C~0771 2002 12 04.31440 03 09 26.96 +16 31 17.0 98WV24 662 C~0771 2004 09 21.335935 03 27 50.22 +17 39 03.2 98WV24 645 C~1cF1 2004 09 21.336765 03 27 50.21 +17 39 03.2 98WV24 645 C~1cF1 2004 09 21.339252 03 27 50.21 +17 39 03.2 98WV24 645 C~1cF1 2007 08 27.11490 03 47 08.94 +18 40 58.3 24.2R 98WV24 250 S~06AK 2007 08 27.12184 03 47 08.94 +18 40 58.3 98WV24 250 S~06AK 2007 08 27.12809 03 47 08.95 +18 40 58.3 98WV24 250 S~06AK 2007 08 27.13434 03 47 08.95 +18 40 58.3 98WV24 250 S~06AK 2008 12 22.26460 03 46 02.69 +18 34 02.5 22.0r 98WV24 695 C~0hkJ 2008 12 22.35218 03 46 02.29 +18 34 01.2 21.7r 98WV24 695 C~0hkJ 2020 11 14.407770 05 06 42.174 +21 22 44.18 23.3G 98WV24 G37 C~4NCW 2020 11 14.462350 05 06 41.842 +21 22 43.85 98WV24 G37 C~4NCW 2020 11 14.491200 05 06 41.684 +21 22 44.04 98WV24 G37 C~4NCW
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 0.21 0.00 -0.21
2 0.0002 0.00 0.38 0.00 -0.42
3 0.0226 0.00 -0.29 0.00 -0.18
4 0.0253 0.00 -0.19 0.00 -0.44
5 0.1783 0.00 -0.28 0.00 -0.04
6 0.1812 0.00 -0.23 0.00 -0.12
7 0.8061 0.00 0.32 0.00 0.11
8 0.8062 0.00 0.25 0.00 0.08
9 0.8936 0.00 -0.39 0.00 0.09
10 0.8938 0.00 -0.48 0.00 0.17
11 2.0152 0.00 0.23 0.00 0.23
12 2.0158 0.00 0.19 0.00 0.58
13 4.0440 0.00 0.13 0.00 0.68
14 4.0443 0.00 -0.09 0.00 0.61
15 5.8432 0.00 0.46 0.00 -0.38
16 5.8432 0.00 0.35 0.00 -0.37
17 5.8432 0.00 0.45 0.00 -0.34
18 8.7720 0.00 -0.57 0.00 -0.02
19 8.7721 0.00 -0.61 0.00 -0.01
20 8.7721 0.00 -0.51 0.00 -0.01
21 8.7721 0.00 -0.55 0.00 -0.00
22 10.0948 0.00 0.17 0.00 0.05
23 10.0951 0.00 0.19 0.00 -0.05
24 21.9912 0.00 0.64 0.00 -0.20
25 21.9913 0.00 -0.16 0.00 -0.11
26 21.9914 0.00 -0.32 0.00 0.31
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.
98WV24 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 39.297 39.297 39.297 ecceobj 0.043 0.043 0.043 incobj 1.514 1.514 1.514 qmin 36.341 36.328 36.345 qmax 41.918 41.956 41.947 amean 39.022 39.022 39.022 amin 38.710 38.710 38.716 amax 39.352 39.348 39.342 emean 0.044 0.044 0.044 emin 0.021 0.021 0.021 emax 0.066 0.067 0.067 imean 1.948 1.948 1.948 imin 0.695 0.695 0.695 imax 2.849 2.849 2.849 excite_mean 0.057 0.057 0.057 fracstop 1.000 1.000 1.000 cjmean 3.045 3.045 3.045 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 181.5 181.3 181.5 kozaiamp 180.0 180.0 179.9