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: 118378
# Created Fri Apr 19 01:07:18 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 54 observations of 54
# Arc: 20.78y
# First observation: 1999/04/17
# Last observation: 2020/01/26
# Chi-squared of fit: 121.95 DOF: 102 RMS: 0.27
# Min/Max residuals: -0.93 0.92
# Exact a, adot, b, bdot, g, gdot:
1.157719E-05 2.439402E-02 -2.824625E-07 -9.978709E-04 2.460862E-02 -2.533878E-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
4.582693 -154.292419 -0.016285 0.080549 -1.007988 2451285.747113
# Heliocentric elements and errors
Epoch: 2451286.5000 = 1999/04/18
Mean Anomaly: 298.30403 +/- 0.000
Argument of Peri: 191.47361 +/- 0.000
Long of Asc Node: 87.87133 +/- 0.000
Inclination: 5.05601 +/- 0.000
Eccentricity: 0.11192994 +/- 0.0000
Semi-Major Axis: 43.48929569 +/- 0.0000
Time of Perihelion: 2469239.0561 +/- 0.0
Perihelion: 38.62154142 +/- 0.0000
Aphelion: 48.35704996 +/- 0.0000
Period (y) 286.8017 +/- 0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -37.39262697 +/- 0.0000
Ecliptic Y -18.02381740 +/- 0.0000
Ecliptic Z 3.24675350 +/- 0.0000
Ecliptic XDOT 0.00142002 +/- 0.0000
Ecliptic YDOT -0.00231853 +/- 0.0000
Ecliptic ZDOT -0.00013317 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 41.63668392 +/- 0.0000
Geocenter to KBO 40.63626838 +/- 0.0000
# Hcoef: 7.24
The following table shows the complete astrometric record for 118378. 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 (118378) followed by the observatory code and reference code for the source of the astrometry.
1999 04 17.24637 13 42 01.28 -05 39 49.6 23.1R 118378 695 Ca4930 1999 04 17.33279 13 42 00.81 -05 39 46.9 118378 695 Ca4930 1999 04 17.41962 13 42 00.45 -05 39 44.8 118378 695 Ca4930 1999 05 06.92759 13 40 32.78 -05 31 55.4 118378 950 Ca4930 1999 05 06.99642 13 40 32.49 -05 31 54.0 118378 950 Ca4930 1999 06 05.91231 13 38 44.32 -05 23 48.1 23.0R 118378 950 Ca5574 1999 06 05.96603 13 38 44.16 -05 23 47.2 22.9R 118378 950 Ca5574 1999 06 06.02556 13 38 44.01 -05 23 46.8 23.2R 118378 950 Ca5574 2000 03 31.56036 13 48 22.68 -06 20 04.0 23.6R 118378 568 Cb1943 2000 03 31.58447 13 48 22.55 -06 20 03.4 23.6R 118378 568 Cb1943 2000 04 02.57830 13 48 13.86 -06 19 11.3 23.7R 118378 568 Cb1943 2000 04 02.60683 13 48 13.71 -06 19 10.5 23.5R 118378 568 Cb1943 2001 03 24.42240 13 54 05.46 -06 56 25.0 23.0R 118378 695 Cc7487 2001 03 24.49709 13 54 05.14 -06 56 23.2 118378 695 Cc7487 2001 03 25.27529 13 54 02.00 -06 56 02.5 20.5 118378 304 Ce8605 2001 03 25.30194 13 54 01.89 -06 56 01.9 118378 304 Ce8605 2001 05 19.47444 13 49 58.16 -06 34 08.9 22.9R 118378 568 Ce6449 2001 05 20.32061 13 49 54.86 -06 33 54.1 118378 568 Ce6449 2001 05 20.41978 13 49 54.46 -06 33 52.1 118378 568 Ce6449 2005 04 10.38084 14 14 06.73 -09 01 51.3 23.4R 118378 695 Cn3058 2005 04 10.45780 14 14 06.38 -09 01 49.6 118378 695 Cn3058 2005 04 11.34846 14 14 02.38 -09 01 28.0 118378 695 Cn3058 2005 05 09.19573 14 11 52.58 -08 50 28.7 21.7R 118378 807 Cn5292 2005 05 10.19076 14 11 48.05 -08 50 07.9 118378 807 Cn5292 2005 05 10.27546 14 11 47.66 -08 50 06.1 118378 807 Cn5292 2010 05 11.403009 14 39 13.093 -11 33 00.84 22.1G 118378 F51 C~42Ax 2011 06 02.364010 14 43 11.270 -11 58 16.69 23.7G 118378 F51 C~42Ax 2012 04 27.452017 14 51 36.007 -12 41 14.02 23.1G 118378 F51 C~42Ax 2012 04 27.467003 14 51 35.921 -12 41 13.88 22.6G 118378 F51 C~42Ax 2012 04 27.482054 14 51 35.841 -12 41 13.25 21.8G 118378 F51 C~42Ax 2012 05 21.358528 14 49 40.243 -12 33 07.98 23.1G 118378 F51 C~42Ax 2012 05 21.373056 14 49 40.171 -12 33 07.62 22.9G 118378 F51 C~42Ax 2012 05 21.387581 14 49 40.096 -12 33 07.32 22.6G 118378 F51 C~42Ax 2013 05 09.454178 14 56 21.625 -13 08 24.23 23.6G 118378 F51 C~42Ax 2014 05 24.363084 15 00 56.397 -13 34 45.55 23.4G 118378 F51 C~42Ax 2014 05 24.429788 15 00 56.072 -13 34 43.98 23.5G 118378 F51 C~42Ax 2014 05 24.442406 15 00 56.011 -13 34 43.95 23.1G 118378 F51 C~42Ax 2014 06 03.407025 15 00 10.434 -13 31 59.07 23.0G 118378 F51 C~42Ax 2014 06 03.419744 15 00 10.411 -13 31 58.94 21.7G 118378 F51 C~42Ax 2015 04 25.508059 15 09 08.340 -14 14 45.34 23.4G 118378 F51 C~42Ax 2015 05 20.07008 15 07 07.34 -14 06 48.2 118378 W84 C~1Tyc 2015 05 22.15734 15 06 57.15 -14 06 10.5 24.0V 118378 W84 C~1Tyc 2015 05 24.07033 15 06 47.90 -14 05 36.6 118378 W84 C~1Tyc 2017 04 27.514458 15 20 45.872 -15 13 46.42 23.0G 118378 F51 C~42Ax 2017 05 18.367799 15 19 02.136 -15 07 23.09 24.5G 118378 F51 C~42Ax 2017 07 16.297807 15 15 19.934 -14 56 36.50 23.2G 118378 F51 C~42Ax 2018 06 18.346328 15 22 38.418 -15 29 12.86 23.7G 118378 F51 C~42Ax 2018 07 11.320309 15 21 24.358 -15 26 14.96 23.8G 118378 F51 C~42Ax 2018 07 12.283685 15 21 22.128 -15 26 11.01 23.1G 118378 F51 C~42Ax 2019 07 01.345446 15 27 51.209 -15 56 13.13 23.2G 118378 F51 C~42Ax 2019 07 01.357386 15 27 51.188 -15 56 13.30 23.9G 118378 F51 C~42Ax 2019 07 01.369256 15 27 51.127 -15 56 13.08 23.5G 118378 F51 C~42Ax 2019 07 01.381153 15 27 51.094 -15 56 13.02 23.4G 118378 F51 C~42Ax 2020 01 26.656580 15 40 45.668 -16 49 54.65 22.8G 118378 F51 C~42Ax
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 0.77 0.00 -0.37
2 0.0002 0.00 -0.23 0.00 0.09
3 0.0005 0.00 0.45 0.00 -0.05
4 0.0539 0.00 0.16 0.00 0.10
5 0.0541 0.00 0.32 0.00 0.01
6 0.1360 0.00 -0.27 0.00 -0.07
7 0.1361 0.00 -0.39 0.00 0.29
8 0.1363 0.00 -0.13 0.00 0.11
9 0.9564 0.00 -0.14 0.00 -0.19
10 0.9564 0.00 -0.50 0.00 -0.23
11 0.9619 0.00 -0.09 0.00 -0.35
12 0.9620 0.00 -0.43 0.00 -0.30
13 1.9361 0.00 0.28 0.00 0.02
14 1.9363 0.00 0.08 0.00 -0.06
15 1.9385 0.00 0.18 0.00 0.92
16 1.9386 0.00 0.19 0.00 0.85
17 2.0896 0.00 0.06 0.00 0.08
18 2.0919 0.00 0.00 0.00 -0.15
19 2.0922 0.00 -0.09 0.00 0.10
20 5.9826 0.00 -0.10 0.00 0.00
21 5.9828 0.00 -0.05 0.00 -0.19
22 5.9852 0.00 0.35 0.00 -0.46
23 6.0615 0.00 -0.01 0.00 0.29
24 6.0642 0.00 -0.07 0.00 -0.28
25 6.0644 0.00 -0.06 0.00 -0.29
26 11.0668 0.00 -0.14 0.00 0.18
27 12.1263 0.00 0.01 0.00 -0.03
28 13.0300 0.00 0.27 0.00 0.00
29 13.0300 0.00 0.09 0.00 -0.18
30 13.0301 0.00 0.01 0.00 0.13
31 13.0954 0.00 0.14 0.00 -0.08
32 13.0955 0.00 0.09 0.00 0.01
33 13.0955 0.00 0.01 0.00 0.04
34 14.0622 0.00 0.05 0.00 -0.18
35 15.1023 0.00 0.07 0.00 -0.16
36 15.1025 0.00 0.03 0.00 0.22
37 15.1025 0.00 0.03 0.00 0.03
38 15.1298 0.00 -0.49 0.00 -0.22
39 15.1298 0.00 0.01 0.00 -0.29
40 16.0226 0.00 0.13 0.00 0.06
41 16.0899 0.00 -0.37 0.00 0.27
42 16.0956 0.00 -0.38 0.00 0.19
43 16.1008 0.00 -0.47 0.00 0.10
44 18.0295 0.00 -0.05 0.00 0.05
45 18.0866 0.00 -0.11 0.00 -0.93
46 18.2479 0.00 0.15 0.00 0.16
47 19.1707 0.00 0.27 0.00 0.26
48 19.2336 0.00 0.32 0.00 -0.09
49 19.2362 0.00 0.05 0.00 0.29
50 20.2056 0.00 0.01 0.00 0.23
51 20.2056 0.00 0.30 0.00 -0.03
52 20.2057 0.00 -0.02 0.00 0.09
53 20.2057 0.00 0.09 0.00 0.06
54 20.7787 0.00 -0.30 0.00 -0.04
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.
118378 quality flag:3 Type: 7:4EEE 7:4EEE 7:4EEE axisobj 43.475 43.475 43.475 ecceobj 0.111 0.111 0.111 incobj 5.058 5.058 5.058 qmin 38.374 38.323 38.315 qmax 49.543 49.519 49.569 amean 43.726 43.725 43.726 amin 43.304 43.303 43.293 amax 44.183 44.190 44.163 emean 0.106 0.106 0.107 emin 0.091 0.091 0.090 emax 0.122 0.121 0.122 imean 3.228 3.227 3.238 imin 2.353 2.354 2.351 imax 4.111 4.158 4.172 excite_mean 0.121 0.121 0.121 fracstop 1.000 1.000 1.000 cjmean 3.081 3.081 3.081 libcent 0 180.8 183.4 179.7 libamp 0 160.2 164.4 161.0 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 179.6 181.5 185.5 kozaiamp 179.9 180.0 180.0