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: 118228
# Created Sun Dec 22 02:06:52 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 94 observations of 94
# Arc: 24.17y
# First observation: 1996/10/08
# Last observation: 2020/12/09
# Chi-squared of fit: 261.60 DOF: 182 RMS: 0.29
# Min/Max residuals: -1.17 0.70
# Exact a, adot, b, bdot, g, gdot:
1.746640E-05 3.262892E-02 3.633151E-06 8.218382E-03 2.973219E-02 -8.752080E-05
# 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
3.976001 25.980586 0.174636 0.067802 -0.977589 2450364.897280
# Heliocentric elements and errors
Epoch: 2450364.5000 = 1996/10/08
Mean Anomaly: 357.74223 +/- 0.000
Argument of Peri: 18.37080 +/- 0.000
Long of Asc Node: 10.70304 +/- 0.000
Inclination: 14.64666 +/- 0.000
Eccentricity: 0.12389355 +/- 0.0000
Semi-Major Axis: 39.50316406 +/- 0.0000
Time of Perihelion: 2450933.2517 +/- 0.0
Perihelion: 34.60897676 +/- 0.0000
Aphelion: 44.39735136 +/- 0.0000
Period (y) 248.2882 +/- 0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 31.12466387 +/- 0.0000
Ecliptic Y 14.96460224 +/- 0.0000
Ecliptic Z 2.33224581 +/- 0.0000
Ecliptic XDOT -0.00136397 +/- 0.0000
Ecliptic YDOT 0.00267914 +/- 0.0000
Ecliptic ZDOT 0.00075422 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 34.61392241 +/- 0.0000
Geocenter to KBO 33.63361815 +/- 0.0000
# Hcoef: 7.13
The following table shows the complete astrometric record for 118228. 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 (118228) followed by the observatory code and reference code for the source of the astrometry.
1996 10 08.39656 01 30 25.00 +13 44 10.0 22.5R 118228 568 C30144 1996 10 08.40454 01 30 24.95 +13 44 09.8 118228 568 C30144 1996 10 08.41251 01 30 24.91 +13 44 09.6 118228 568 C30144 1996 10 12.37903 01 30 02.47 +13 42 24.2 118228 568 C30144 1996 10 12.39328 01 30 02.40 +13 42 24.1 118228 568 C30144 1996 10 12.40867 01 30 02.30 +13 42 23.5 118228 568 C30144 1996 10 12.43983 01 30 02.20 +13 42 22.5 118228 568 C30144 1996 10 12.49096 01 30 01.82 +13 42 21.0 118228 568 C30144 1996 10 12.50351 01 30 01.76 +13 42 20.8 118228 568 C30144 1996 11 17.22662 01 26 49.12 +13 25 40.4 118228 696 C30195 1996 11 17.33679 01 26 48.59 +13 25 37.7 118228 696 C30195 1996 11 18.21788 01 26 44.53 +13 25 14.6 21.6R 118228 696 C30195 1996 11 18.32149 01 26 44.02 +13 25 11.5 118228 696 C30195 1997 07 11.42666 01 40 35.77 +14 55 51.6 118228 696 C30195 1997 07 12.41263 01 40 37.64 +14 56 14.3 21.2R 118228 696 C30195 1997 07 12.46436 01 40 37.77 +14 56 15.4 21.3R 118228 696 C30195 1997 07 13.41230 01 40 39.44 +14 56 36.0 21.5R 118228 696 C30195 1997 09 08.47421 01 39 24.25 +15 01 10.1 118228 675 C30579 1997 09 08.52029 01 39 24.05 +15 01 09.7 118228 675 C30579 1997 11 08.30400 01 34 01.73 +14 37 17.5 22.5R 118228 696 Ca0191 1997 11 08.36184 01 34 01.42 +14 37 15.8 118228 696 Ca0191 1998 10 17.34276 01 42 39.51 +15 54 28.9 118228 705 Ca2543 1998 10 17.37526 01 42 39.32 +15 54 27.9 118228 705 Ca2543 1998 10 17.41988 01 42 39.09 +15 54 26.9 118228 705 Ca2543 1998 10 18.34292 01 42 33.76 +15 54 02.9 118228 705 Ca2543 1998 10 18.40184 01 42 33.41 +15 54 01.6 118228 705 Ca2543 1998 11 25.07705 01 39 11.64 +15 36 40.4 22.5R 118228 711 Ca3585 1998 11 25.11509 01 39 11.46 +15 36 39.4 22.4R 118228 711 Ca3585 1998 11 25.12869 01 39 11.41 +15 36 39.1 22.4R 118228 711 Ca3585 1998 11 25.15631 01 39 11.26 +15 36 38.6 22.5R 118228 711 Ca3585 1998 11 25.16999 01 39 11.21 +15 36 38.0 22.4R 118228 711 Ca3585 1998 11 25.20528 01 39 11.06 +15 36 37.1 22.4R 118228 711 Ca3585 1998 11 25.21941 01 39 10.98 +15 36 36.9 22.1R 118228 711 Ca3585 1998 11 25.24463 01 39 10.87 +15 36 36.0 22.3R 118228 711 Ca3585 1998 11 25.25841 01 39 10.83 +15 36 35.8 22.3R 118228 711 Ca3585 1998 11 25.27168 01 39 10.74 +15 36 35.4 22.3R 118228 711 Ca3585 1998 11 25.30573 01 39 10.62 +15 36 34.6 22.8R 118228 711 Ca3585 1999 11 10.18669 01 47 02.70 +16 49 45.3 118228 696 Ca7269 1999 11 10.23222 01 47 02.45 +16 49 44.7 118228 696 Ca7269 1999 11 10.28375 01 47 02.16 +16 49 43.2 118228 696 Ca7269 1999 11 11.12043 01 46 57.63 +16 49 19.9 22.4 118228 696 Ca7269 1999 11 11.16523 01 46 57.36 +16 49 18.5 118228 696 Ca7269 2005 09 30.36639 02 32 11.98 +23 20 04.6 22.4R 118228 688 Co3236 2005 09 30.45773 02 32 11.53 +23 20 03.5 118228 688 Co3236 2005 11 04.394033 02 28 50.69 +23 09 40.8 21.8V 118228 645 C~1RvP 2005 11 04.394862 02 28 50.69 +23 09 40.7 21.1V 118228 645 C~1RvP 2005 11 04.397350 02 28 50.68 +23 09 40.7 24.4V 118228 645 C~1RvP 2005 12 06.298876 02 25 51.18 +22 55 34.6 22.3V 118228 645 C~1RvP 2005 12 06.299705 02 25 51.18 +22 55 34.6 22.0V 118228 645 C~1RvP 2005 12 06.302193 02 25 51.17 +22 55 34.6 23.2V 118228 645 C~1RvP 2008 09 26.44407 02 54 15.90 +26 09 25.6 24.6R 118228 250 S~06HA 2008 09 26.45101 02 54 15.87 +26 09 25.6 118228 250 S~06HA 2008 09 26.45726 02 54 15.85 +26 09 25.7 118228 250 S~06HA 2008 09 26.46421 02 54 15.81 +26 09 25.6 118228 250 S~06HA 2010 07 19.595962 03 09 21.937 +27 31 28.02 22.4G 118228 F51 C~42Av 2010 09 14.630108 03 09 58.168 +27 53 07.04 22.4G 118228 F51 C~42Av 2010 10 31.568804 03 06 10.713 +27 50 00.90 22.9G 118228 F51 C~42Av 2011 11 25.292339 03 11 16.047 +28 33 12.09 22.1G 118228 F51 C~42Av 2011 11 30.418257 03 10 44.306 +28 31 10.41 22.3G 118228 F51 C~42Av 2012 10 27.437269 03 22 02.803 +29 30 55.85 22.5G 118228 F51 C~42Av 2012 11 03.579824 03 21 18.211 +29 29 26.72 22.8G 118228 F51 C~42Av 2013 11 06.35148 03 28 55.56 +30 16 22.2 22.1R 118228 G37 C~0z14 2013 11 06.44081 03 28 54.99 +30 16 21.1 118228 G37 C~0z14 2014 11 22.483030 03 35 09.893 +30 57 55.66 22.3G 118228 F51 C~42Av 2014 11 22.495396 03 35 09.796 +30 57 55.49 22.6G 118228 F51 C~42Av 2014 11 22.507749 03 35 09.741 +30 57 55.23 22.0G 118228 F51 C~42Av 2014 11 22.520115 03 35 09.638 +30 57 54.78 21.7G 118228 F51 C~42Av 2014 12 09.479700 03 33 21.066 +30 51 57.75 22.5G 118228 F51 C~42Av 2014 12 20.388086 03 32 18.565 +30 47 34.46 22.4G 118228 F51 C~42Av 2014 12 20.400261 03 32 18.483 +30 47 34.48 22.6G 118228 F51 C~42Av 2014 12 20.412351 03 32 18.423 +30 47 34.05 22.3G 118228 F51 C~42Av 2014 12 20.424488 03 32 18.351 +30 47 33.84 23.4G 118228 F51 C~42Av 2015 01 21.290839 03 30 17.945 +30 34 43.08 22.8G 118228 F51 C~42Av 2015 01 21.303264 03 30 17.925 +30 34 42.59 22.7G 118228 F51 C~42Av 2015 01 21.315796 03 30 17.912 +30 34 42.30 22.2G 118228 F51 C~42Av 2015 12 16.307082 03 40 42.943 +31 33 49.24 22.0G 118228 F51 C~42Av 2016 02 03.268538 03 37 52.615 +31 14 48.72 23.2G 118228 F51 C~42Av 2016 11 18.498392 03 51 45.495 +32 24 39.22 21.2G 118228 F51 C~42Av 2017 08 23.62195 04 04 58.524 +32 50 54.43 118228 568 C~2N4H 2017 08 27.54973 04 05 03.841 +32 52 39.60 118228 568 C~2N4H 2017 10 21.54869 04 02 54.627 +33 06 39.27 118228 568 C~2QHo 2017 10 21.55265 04 02 54.607 +33 06 39.27 118228 568 C~2QHo 2017 10 22.54515 04 02 49.252 +33 06 41.19 118228 568 C~2QHo 2017 10 27.51433 04 02 21.296 +33 06 42.99 118228 568 C~2QHo 2017 11 19.340411 03 59 55.292 +33 04 10.52 22.9G 118228 F51 C~42Av 2017 11 19.352287 03 59 55.226 +33 04 10.49 21.9G 118228 F51 C~42Av 2017 11 19.364100 03 59 55.100 +33 04 09.94 22.1G 118228 F51 C~42Av 2017 11 19.375831 03 59 55.062 +33 04 10.10 22.6G 118228 F51 C~42Av 2017 11 21.45057 03 59 40.965 +33 03 43.89 22.6w 118228 568 C~2X1R 2017 12 12.391244 03 57 21.308 +32 57 44.41 21.7G 118228 F51 C~42Av 2018 01 12.357906 03 54 39.566 +32 45 44.01 22.5G 118228 F51 C~42Av 2020 12 09.288150 04 22 46.365 +34 45 48.49 22.8G 118228 G37 C~4RfG 2020 12 09.330220 04 22 46.055 +34 45 48.15 118228 G37 C~4RfG 2020 12 09.366450 04 22 45.818 +34 45 47.71 118228 G37 C~4RfG
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 -0.08 0.00 0.13
2 0.0000 0.00 -0.15 0.00 0.14
3 0.0000 0.00 -0.06 0.00 0.15
4 0.0109 0.00 -0.53 0.00 0.17
5 0.0109 0.00 -0.34 0.00 0.45
6 0.0110 0.00 -0.51 0.00 0.26
7 0.0111 0.00 0.70 0.00 0.10
8 0.0112 0.00 -0.57 0.00 -0.01
9 0.0112 0.00 -0.38 0.00 0.13
10 0.1090 0.00 0.13 0.00 -0.11
11 0.1094 0.00 0.02 0.00 0.09
12 0.1118 0.00 0.11 0.00 -0.02
13 0.1120 0.00 -0.27 0.00 -0.42
14 0.7557 0.00 -1.17 0.00 0.22
15 0.7584 0.00 -0.66 0.00 0.27
16 0.7586 0.00 -0.06 0.00 0.19
17 0.7612 0.00 0.02 0.00 -0.42
18 0.9174 0.00 0.01 0.00 0.45
19 0.9175 0.00 -0.13 0.00 0.63
20 1.0839 0.00 0.50 0.00 -0.41
21 1.0841 0.00 0.50 0.00 -0.46
22 2.0231 0.00 -0.51 0.00 -0.68
23 2.0232 0.00 -0.50 0.00 -0.82
24 2.0233 0.00 -0.05 0.00 -0.63
25 2.0259 0.00 -0.24 0.00 -0.21
26 2.0260 0.00 -0.32 0.00 0.07
27 2.1292 0.00 0.40 0.00 -0.18
28 2.1293 0.00 0.29 0.00 -0.21
29 2.1293 0.00 0.46 0.00 -0.16
30 2.1294 0.00 0.09 0.00 0.04
31 2.1294 0.00 0.27 0.00 -0.21
32 2.1295 0.00 0.42 0.00 -0.20
33 2.1296 0.00 0.18 0.00 -0.04
34 2.1296 0.00 0.25 0.00 -0.29
35 2.1297 0.00 0.58 0.00 -0.13
36 2.1297 0.00 0.13 0.00 -0.19
37 2.1298 0.00 0.63 0.00 -0.11
38 3.0877 0.00 0.26 0.00 -0.31
39 3.0878 0.00 0.29 0.00 0.37
40 3.0880 0.00 0.23 0.00 0.33
41 3.0903 0.00 0.18 0.00 0.65
42 3.0904 0.00 -0.18 0.00 0.50
43 8.9773 0.00 -0.00 0.00 0.47
44 8.9776 0.00 0.13 0.00 0.26
45 9.0732 0.00 0.33 0.00 0.11
46 9.0732 0.00 0.41 0.00 0.03
47 9.0732 0.00 0.49 0.00 0.09
48 9.1606 0.00 0.01 0.00 -0.02
49 9.1606 0.00 0.07 0.00 0.00
50 9.1606 0.00 0.10 0.00 0.07
51 11.9673 0.00 -0.14 0.00 0.16
52 11.9673 0.00 -0.14 0.00 0.18
53 11.9673 0.00 -0.04 0.00 0.29
54 11.9673 0.00 -0.19 0.00 0.20
55 13.7774 0.00 0.43 0.00 -0.17
56 13.9336 0.00 0.08 0.00 0.01
57 14.0621 0.00 -0.12 0.00 0.07
58 15.1291 0.00 -0.25 0.00 -0.12
59 15.1431 0.00 -0.31 0.00 -0.25
60 16.0521 0.00 -0.55 0.00 0.03
61 16.0717 0.00 -0.09 0.00 -0.11
62 17.0786 0.00 -0.39 0.00 0.32
63 17.0788 0.00 -0.18 0.00 0.45
64 18.1221 0.00 -0.11 0.00 0.06
65 18.1221 0.00 -0.32 0.00 0.13
66 18.1221 0.00 0.10 0.00 0.10
67 18.1222 0.00 -0.20 0.00 -0.12
68 18.1686 0.00 -0.08 0.00 -0.03
69 18.1985 0.00 0.06 0.00 -0.25
70 18.1985 0.00 -0.17 0.00 0.07
71 18.1985 0.00 -0.08 0.00 -0.05
72 18.1986 0.00 -0.17 0.00 0.04
73 18.2858 0.00 -0.26 0.00 0.07
74 18.2859 0.00 -0.18 0.00 -0.15
75 18.2859 0.00 0.01 0.00 -0.16
76 19.1866 0.00 0.36 0.00 -0.04
77 19.3207 0.00 -0.23 0.00 -0.11
78 20.1125 0.00 -0.55 0.00 -0.59
79 20.8740 0.00 0.22 0.00 0.02
80 20.8847 0.00 0.33 0.00 -0.02
81 21.0353 0.00 0.15 0.00 0.05
82 21.0353 0.00 0.17 0.00 0.04
83 21.0381 0.00 0.16 0.00 0.05
84 21.0517 0.00 0.13 0.00 0.02
85 21.1142 0.00 0.00 0.00 -0.01
86 21.1142 0.00 0.24 0.00 0.10
87 21.1142 0.00 -0.43 0.00 -0.31
88 21.1142 0.00 0.21 0.00 -0.01
89 21.1199 0.00 0.08 0.00 0.04
90 21.1773 0.00 0.05 0.00 -0.03
91 21.2620 0.00 0.04 0.00 -0.16
92 24.1695 0.00 0.39 0.00 -0.16
93 24.1696 0.00 0.11 0.00 0.15
94 24.1697 0.00 0.31 0.00 0.28
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.
118228 quality flag:3 Type: 3:2E 3:2E 3:2E axisobj 39.775 39.775 39.775 ecceobj 0.130 0.130 0.130 incobj 14.629 14.629 14.629 qmin 33.992 33.992 33.992 qmax 45.179 45.180 45.178 amean 39.458 39.458 39.458 amin 39.145 39.145 39.145 amax 39.799 39.799 39.799 emean 0.109 0.109 0.109 emin 0.085 0.085 0.085 emax 0.137 0.137 0.137 imean 14.806 14.806 14.806 imin 14.131 14.131 14.131 imax 15.441 15.441 15.441 excite_mean 0.278 0.278 0.278 fracstop 1.000 1.000 1.000 cjmean 2.963 2.963 2.963 libcent 0 179.7 179.7 179.7 libamp 0 31.4 31.4 31.4 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 181.9 181.9 181.8 kozaiamp 180.0 180.0 180.0