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: 98KS65 # Created Fri Apr 19 01:09:38 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 57 observations of 57 # Arc: 23.32y # First observation: 1998/05/20 # Last observation: 2021/09/12 # Chi-squared of fit: 19.91 DOF: 108 RMS: 0.10 # Min/Max residuals: -0.37 0.32 # Exact a, adot, b, bdot, g, gdot: 1.599325E-05 2.347856E-02 -5.704933E-07 -4.509083E-04 2.389278E-02 5.804208E-04 # Covariance matrix: 3.6594E-14 -7.8729E-15 -1.5613E-17 1.7560E-16 3.0039E-14 -1.4603E-14 -7.8729E-15 6.9973E-14 5.0671E-16 -1.3371E-15 7.1251E-14 1.1623E-13 -1.5613E-17 5.0671E-16 2.7905E-14 -1.4357E-15 6.6449E-16 8.3587E-16 1.7560E-16 -1.3371E-15 -1.4357E-15 7.6204E-16 -1.1445E-15 -2.2685E-15 3.0039E-14 7.1251E-14 6.6449E-16 -1.1445E-15 2.3951E-13 1.0247E-13 -1.4603E-14 1.1623E-13 8.3587E-16 -2.2685E-15 1.0247E-13 1.9688E-13 # lat0 lon0 xBary yBary zBary JD0 -0.419576 -55.564405 0.924877 -0.003251 -0.416235 2450953.823321 # Heliocentric elements and errors Epoch: 2450954.5000 = 1998/05/21 Mean Anomaly: 0.79523 +/- 0.025 Argument of Peri: 199.67016 +/- 0.027 Long of Asc Node: 102.66453 +/- 0.001 Inclination: 1.18435 +/- 0.000 Eccentricity: 0.04017962 +/- 0.0001 Semi-Major Axis: 44.05647739 +/- 0.0033 Time of Perihelion: 2450718.5600 +/- 7.5 Perihelion: 42.28630478 +/- 0.0040 Aphelion: 45.82665001 +/- 0.0042 Period (y) 292.4306 +/- 0.03 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 23.14816683 +/- 0.0005 Ecliptic Y -35.38665780 +/- 0.0007 Ecliptic Z -0.30652347 +/- 0.0000 Ecliptic XDOT 0.00225801 +/- 0.0000 Ecliptic YDOT 0.00147566 +/- 0.0000 Ecliptic ZDOT -0.00005223 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 42.28648841 +/- 0.0006 Geocenter to KBO 41.85366683 +/- 0.0009 # Hcoef: 7.65
The following table shows the complete astrometric record for 98KS65. 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 (98KS65) followed by the observatory code and reference code for the source of the astrometry.
1998 05 20.32259 20 27 30.36 -19 33 33.3 23.9R 98KS65 807 Ca1789 1998 05 20.32947 20 27 30.35 -19 33 33.4 23.5R 98KS65 807 Ca1789 1998 05 20.33656 20 27 30.35 -19 33 33.5 23.9R 98KS65 807 Ca1789 1998 05 20.34343 20 27 30.33 -19 33 33.6 23.7R 98KS65 807 Ca1789 1998 05 20.35031 20 27 30.32 -19 33 33.6 23.5R 98KS65 807 Ca1789 1998 05 20.35804 20 27 30.31 -19 33 33.5 23.6R 98KS65 807 Ca1789 1998 05 20.36498 20 27 30.30 -19 33 33.6 23.7R 98KS65 807 Ca1789 1998 05 20.37193 20 27 30.30 -19 33 33.6 23.7R 98KS65 807 Ca1789 1998 05 20.37885 20 27 30.29 -19 33 33.7 23.7R 98KS65 807 Ca1789 1998 05 20.38572 20 27 30.27 -19 33 33.6 23.7R 98KS65 807 Ca1789 1998 05 20.39267 20 27 30.26 -19 33 33.8 23.8R 98KS65 807 Ca1789 1998 05 20.39954 20 27 30.25 -19 33 33.9 23.5R 98KS65 807 Ca1789 1998 05 20.40648 20 27 30.24 -19 33 33.9 23.7R 98KS65 807 Ca1789 1998 05 20.41336 20 27 30.23 -19 33 33.9 23.9R 98KS65 807 Ca1789 1998 05 20.42023 20 27 30.22 -19 33 33.9 23.8R 98KS65 807 Ca1789 1998 05 20.42710 20 27 30.21 -19 33 34.0 23.9R 98KS65 807 Ca1789 1998 05 20.43397 20 27 30.20 -19 33 34.0 23.6R 98KS65 807 Ca1789 1998 05 29.33008 20 27 14.04 -19 34 37.5 23.5R 98KS65 807 Ca1789 1998 05 29.33695 20 27 14.02 -19 34 37.6 23.8R 98KS65 807 Ca1789 1998 05 29.34383 20 27 14.00 -19 34 37.6 23.5R 98KS65 807 Ca1789 1998 05 29.35070 20 27 13.98 -19 34 37.6 23.4R 98KS65 807 Ca1789 1998 05 29.35758 20 27 13.97 -19 34 37.7 23.5R 98KS65 807 Ca1789 1998 05 29.36446 20 27 13.96 -19 34 37.7 23.7R 98KS65 807 Ca1789 1998 05 29.37133 20 27 13.95 -19 34 37.9 23.5R 98KS65 807 Ca1789 1998 05 29.37821 20 27 13.93 -19 34 37.9 23.5R 98KS65 807 Ca1789 1998 05 29.38509 20 27 13.90 -19 34 37.9 23.6R 98KS65 807 Ca1789 1998 05 29.39196 20 27 13.88 -19 34 38.0 23.5R 98KS65 807 Ca1789 1998 05 29.39884 20 27 13.87 -19 34 38.0 23.6R 98KS65 807 Ca1789 1998 05 29.40571 20 27 13.86 -19 34 38.1 23.6R 98KS65 807 Ca1789 1998 05 29.41260 20 27 13.84 -19 34 38.2 23.5R 98KS65 807 Ca1789 1998 05 30.31129 20 27 11.83 -19 34 45.9 23.9R 98KS65 807 Ca1789 1998 05 30.31817 20 27 11.82 -19 34 45.9 23.7R 98KS65 807 Ca1789 1998 05 30.33192 20 27 11.79 -19 34 46.0 23.7R 98KS65 807 Ca1789 1998 05 30.33879 20 27 11.77 -19 34 46.1 23.5R 98KS65 807 Ca1789 1998 05 30.34567 20 27 11.74 -19 34 46.2 23.8R 98KS65 807 Ca1789 1998 05 30.35270 20 27 11.73 -19 34 46.3 23.9R 98KS65 807 Ca1789 1998 05 30.35957 20 27 11.72 -19 34 46.2 23.8R 98KS65 807 Ca1789 1998 05 30.36645 20 27 11.70 -19 34 46.4 23.6R 98KS65 807 Ca1789 1998 05 30.37332 20 27 11.69 -19 34 46.3 23.6R 98KS65 807 Ca1789 1998 05 30.38035 20 27 11.68 -19 34 46.4 23.9R 98KS65 807 Ca1789 1998 05 30.38722 20 27 11.66 -19 34 46.6 23.7R 98KS65 807 Ca1789 1998 05 30.39410 20 27 11.64 -19 34 46.6 23.3R 98KS65 807 Ca1789 1998 08 14.39513 20 21 53.16 -19 53 26.3 23.4R 98KS65 568 Ca1947 1998 08 14.45299 20 21 52.89 -19 53 27.6 98KS65 568 Ca1947 1998 08 14.48078 20 21 52.76 -19 53 27.8 98KS65 568 Ca1947 1999 07 10.47682 20 30 21.58 -19 25 44.5 98KS65 568 Ca5541 1999 07 10.52907 20 30 21.35 -19 25 45.3 98KS65 568 Ca5541 1999 07 11.53090 20 30 16.71 -19 26 02.1 98KS65 568 Ca5541 2000 08 07.07784 20 33 43.41 -19 15 27.6 23.9R 98KS65 809 Cb8997 2000 08 07.11447 20 33 43.22 -19 15 28.4 23.5R 98KS65 809 Cb8997 2000 08 07.13945 20 33 43.11 -19 15 28.9 23.7R 98KS65 809 Cb8997 2000 08 27.06080 20 32 12.87 -19 20 53.8 23.5R 98KS65 807 Ch1065 2001 05 21.53701 20 44 05.38 -18 37 36.2 98KS65 568 Cd2199 2001 05 21.58770 20 44 05.32 -18 37 36.5 98KS65 568 Cd2199 2021 09 12.161160 22 23 58.225 -11 01 14.78 23.3G 98KS65 G37 C~552O 2021 09 12.217910 22 23 57.984 -11 01 16.18 98KS65 G37 C~552O 2021 09 12.276930 22 23 57.730 -11 01 17.69 98KS65 G37 C~552O
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 0.03
2 0.0000 0.00 -0.11 0.00 -0.03
3 0.0000 0.00 0.05 0.00 -0.09
4 0.0001 0.00 -0.09 0.00 -0.15
5 0.0001 0.00 -0.09 0.00 -0.10
6 0.0001 0.00 -0.07 0.00 0.04
7 0.0001 0.00 -0.06 0.00 -0.02
8 0.0001 0.00 0.10 0.00 0.02
9 0.0002 0.00 0.10 0.00 -0.04
10 0.0002 0.00 -0.04 0.00 0.10
11 0.0002 0.00 -0.04 0.00 -0.06
12 0.0002 0.00 -0.03 0.00 -0.12
13 0.0002 0.00 -0.03 0.00 -0.08
14 0.0002 0.00 -0.02 0.00 -0.04
15 0.0003 0.00 -0.02 0.00 -0.00
16 0.0003 0.00 -0.01 0.00 -0.06
17 0.0003 0.00 -0.01 0.00 -0.02
18 0.0247 0.00 0.13 0.00 -0.07
19 0.0247 0.00 0.07 0.00 -0.11
20 0.0247 0.00 0.00 0.00 -0.05
21 0.0247 0.00 -0.06 0.00 0.00
22 0.0247 0.00 0.02 0.00 -0.04
23 0.0248 0.00 0.11 0.00 0.02
24 0.0248 0.00 0.20 0.00 -0.12
25 0.0248 0.00 0.13 0.00 -0.06
26 0.0248 0.00 -0.08 0.00 -0.01
27 0.0248 0.00 -0.15 0.00 -0.05
28 0.0248 0.00 -0.06 0.00 0.01
29 0.0249 0.00 0.03 0.00 -0.03
30 0.0249 0.00 -0.04 0.00 -0.08
31 0.0273 0.00 -0.03 0.00 -0.06
32 0.0274 0.00 0.06 0.00 -0.00
33 0.0274 0.00 0.10 0.00 0.02
34 0.0274 0.00 0.04 0.00 -0.02
35 0.0274 0.00 -0.17 0.00 -0.06
36 0.0275 0.00 -0.07 0.00 -0.10
37 0.0275 0.00 0.03 0.00 0.06
38 0.0275 0.00 -0.03 0.00 -0.08
39 0.0275 0.00 0.07 0.00 0.08
40 0.0275 0.00 0.17 0.00 0.04
41 0.0276 0.00 0.11 0.00 -0.10
42 0.0276 0.00 0.06 0.00 -0.04
43 0.2357 0.00 0.07 0.00 0.24
44 0.2358 0.00 0.09 0.00 -0.18
45 0.2359 0.00 0.09 0.00 0.05
46 1.1394 0.00 -0.37 0.00 -0.00
47 1.1395 0.00 -0.14 0.00 0.07
48 1.1423 0.00 -0.30 0.00 0.11
49 2.2170 0.00 0.07 0.00 0.32
50 2.2171 0.00 -0.11 0.00 0.16
51 2.2172 0.00 0.07 0.00 0.10
52 2.2717 0.00 -0.13 0.00 0.09
53 3.0040 0.00 0.03 0.00 0.29
54 3.0041 0.00 0.08 0.00 0.28
55 23.3151 0.00 -0.09 0.00 -0.03
56 23.3153 0.00 0.02 0.00 -0.03
57 23.3154 0.00 0.09 0.00 -0.10
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.
98KS65 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.822 43.822 43.822 ecceobj 0.035 0.035 0.035 incobj 1.184 1.184 1.184 qmin 41.630 41.630 41.630 qmax 46.183 46.183 46.183 amean 43.830 43.830 43.830 amin 43.494 43.494 43.494 amax 44.178 44.179 44.179 emean 0.030 0.030 0.030 emin 0.013 0.013 0.013 emax 0.046 0.046 0.046 imean 0.911 0.911 0.911 imin 0.124 0.124 0.124 imax 1.449 1.449 1.449 excite_mean 0.035 0.035 0.035 fracstop 1.000 1.000 1.000 cjmean 3.098 3.098 3.098 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 178.2 178.2 178.2 kozaiamp 180.0 180.0 179.9