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: 500884
# Created Fri Nov 22 02:07:13 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 31 observations of 31
# Arc: 3.12y
# First observation: 2013/04/19
# Last observation: 2016/06/03
# Chi-squared of fit: 30.56 DOF: 56 RMS: 0.18
# Min/Max residuals: -0.45 0.57
# Exact a, adot, b, bdot, g, gdot:
1.968196E-05 4.111809E-02 -6.555775E-06 -1.388069E-02 3.418306E-02 -3.778689E-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
7.928001 -117.611575 0.546575 0.116551 -0.836831 2456401.972928
# Heliocentric elements and errors
Epoch: 2456402.5000 = 2013/04/20
Mean Anomaly: 342.72474 +/- 0.000
Argument of Peri: 186.51887 +/- 0.000
Long of Asc Node: 83.06494 +/- 0.000
Inclination: 20.07685 +/- 0.000
Eccentricity: 0.25422381 +/- 0.0000
Semi-Major Axis: 39.29126766 +/- 0.0000
Time of Perihelion: 2460719.3263 +/- 0.0
Perihelion: 29.30249201 +/- 0.0000
Aphelion: 49.28004330 +/- 0.0000
Period (y) 246.2931 +/- 0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -14.30383877 +/- 0.0000
Ecliptic Y -26.16783080 +/- 0.0000
Ecliptic Z 4.03485138 +/- 0.0000
Ecliptic XDOT 0.00297978 +/- 0.0000
Ecliptic YDOT -0.00139638 +/- 0.0000
Ecliptic ZDOT -0.00114273 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 30.09383317 +/- 0.0000
Geocenter to KBO 29.25433142 +/- 0.0000
# Hcoef: 9.59
The following table shows the complete astrometric record for 500884. 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 (500884) followed by the observatory code and reference code for the source of the astrometry.
2013 04 19.47215 16 07 38.452 -12 51 33.64 24.6r 500884 568 C~1XRf 2013 04 19.52501 16 07 38.184 -12 51 32.99 24.4r 500884 568 C~1XRf 2013 05 08.45928 16 05 48.353 -12 46 40.42 24.1r 500884 568 C~1XRf 2013 05 08.50332 16 05 48.069 -12 46 39.84 24.5r 500884 568 C~1XRf 2013 05 08.54713 16 05 47.787 -12 46 39.26 24.3r 500884 568 C~1XRf 2013 05 09.55421 16 05 41.396 -12 46 24.86 24.1r 500884 568 C~1XRf 2013 05 10.55976 16 05 34.988 -12 46 10.60 24.2r 500884 568 C~1XRf 2013 06 06.34333 16 02 39.652 -12 41 20.24 24.4r 500884 568 C~1XRf 2013 06 12.46117 16 02 01.096 -12 40 46.19 24.3r 500884 568 C~1XRf 2013 06 13.45477 16 01 55.010 -12 40 41.13 24.4r 500884 568 C~1XRf 2013 07 02.36871 16 00 10.374 -12 40 38.35 24.3r 500884 568 C~1XRf 2013 07 04.35949 16 00 00.935 -12 40 47.18 24.5r 500884 568 C~1XRf 2013 08 01.25494 15 58 31.924 -12 46 04.31 500884 568 C~1XRf 2013 08 02.30273 15 58 30.327 -12 46 23.79 24.1r 500884 568 C~1XRf 2014 03 06.62650 16 18 28.320 -14 12 57.04 500884 568 C~1XRf 2014 03 07.60113 16 18 28.522 -14 12 51.22 24.4r 500884 568 C~1XRf 2014 05 01.41785 16 15 30.874 -14 02 07.47 24.3r 500884 568 C~1XRf 2014 05 01.46926 16 15 30.562 -14 02 06.80 24.5r 500884 568 C~1XRf 2014 05 01.52791 16 15 30.196 -14 02 05.86 24.0r 500884 568 C~1XRf 2014 05 04.41561 16 15 12.887 -14 01 27.25 24.0r 500884 568 C~1XRf 2014 05 04.46606 16 15 12.587 -14 01 26.61 24.1r 500884 568 C~1XRf 2014 05 04.51675 16 15 12.285 -14 01 25.81 23.9r 500884 568 C~1XRf 2014 05 22.51414 16 13 16.465 -13 57 47.83 23.5r 500884 568 C~1XRf 2014 05 25.46782 16 12 56.767 -13 57 18.06 24.6r 500884 568 C~1XRf 2014 06 02.46901 16 12 03.327 -13 56 07.47 24.4r 500884 568 C~1XRf 2014 07 18.37716 16 07 54.054 -13 56 29.63 24.5r 500884 568 C~1XRf 2014 07 18.38112 16 07 54.040 -13 56 29.76 24.7r 500884 568 C~1XRf 2014 07 26.29286 16 07 29.727 -13 58 00.76 24.3r 500884 568 C~1XRf 2015 03 22.58284 16 27 16.135 -15 22 06.79 24.6r 500884 568 C~1XRf 2016 05 29.36839 16 30 55.148 -16 23 01.61 24.6w 500884 568 C~2LSW 2016 06 03.40852 16 30 20.773 -16 22 29.61 24.4w 500884 568 C~2LSW
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 -0.13 0.00 0.05
2 0.0001 0.00 0.03 0.00 -0.14
3 0.0520 0.00 0.06 0.00 0.03
4 0.0521 0.00 0.05 0.00 -0.02
5 0.0522 0.00 0.05 0.00 -0.08
6 0.0550 0.00 -0.06 0.00 -0.10
7 0.0577 0.00 -0.01 0.00 -0.08
8 0.1311 0.00 0.02 0.00 0.27
9 0.1478 0.00 -0.08 0.00 -0.36
10 0.1505 0.00 0.23 0.00 0.41
11 0.2023 0.00 -0.09 0.00 -0.11
12 0.2078 0.00 -0.20 0.00 -0.14
13 0.2841 0.00 0.02 0.00 0.16
14 0.2870 0.00 -0.04 0.00 -0.38
15 0.8793 0.00 -0.03 0.00 0.11
16 0.8819 0.00 0.20 0.00 -0.20
17 1.0320 0.00 0.15 0.00 0.11
18 1.0322 0.00 0.10 0.00 0.09
19 1.0323 0.00 -0.09 0.00 0.23
20 1.0402 0.00 -0.45 0.00 -0.01
21 1.0404 0.00 -0.26 0.00 -0.03
22 1.0405 0.00 -0.08 0.00 0.09
23 1.0898 0.00 0.17 0.00 0.32
24 1.0979 0.00 0.57 0.00 0.05
25 1.1198 0.00 -0.01 0.00 0.15
26 1.2455 0.00 0.03 0.00 -0.08
27 1.2455 0.00 0.04 0.00 -0.17
28 1.2671 0.00 0.01 0.00 -0.03
29 1.9223 0.00 0.05 0.00 0.03
30 3.1099 0.00 0.06 0.00 -0.25
31 3.1237 0.00 -0.19 0.00 0.05
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.
500884 quality flag:3 Type: 3:2E 3:2E 3:2E axisobj 39.171 39.171 39.171 ecceobj 0.254 0.254 0.254 incobj 20.070 20.070 20.070 qmin 26.082 26.083 26.082 qmax 53.360 53.358 53.361 amean 39.454 39.454 39.454 amin 39.103 39.104 39.103 amax 39.888 39.885 39.891 emean 0.292 0.292 0.292 emin 0.251 0.251 0.251 emax 0.339 0.339 0.339 imean 16.795 16.794 16.795 imin 14.339 14.336 14.341 imax 18.676 18.676 18.676 excite_mean 0.412 0.412 0.412 fracstop 1.000 1.000 1.000 cjmean 2.858 2.858 2.858 libcent 0 179.9 180.0 179.9 libamp 0 16.8 16.8 16.8 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 203.6 203.7 203.5 kozaiamp 180.0 180.0 180.0