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: 500885
# Created Fri Nov 22 02:07:13 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 23 observations of 23
# Arc: 3.15y
# First observation: 2013/04/10
# Last observation: 2016/06/03
# Chi-squared of fit: 12.10 DOF: 40 RMS: 0.13
# Min/Max residuals: -0.32 0.32
# Exact a, adot, b, bdot, g, gdot:
1.697966E-05 3.239418E-02 -3.586712E-07 -6.233818E-04 2.944180E-02 7.300940E-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
7.348005 -115.832641 0.688809 0.093361 -0.723857 2456393.110038
# Heliocentric elements and errors
Epoch: 2456392.5000 = 2013/04/10
Mean Anomaly: 48.73596 +/- 0.000
Argument of Peri: 24.77014 +/- 0.000
Long of Asc Node: 145.67426 +/- 0.000
Inclination: 7.25189 +/- 0.000
Eccentricity: 0.23078858 +/- 0.0000
Semi-Major Axis: 39.18604799 +/- 0.0000
Time of Perihelion: 2444263.0080 +/- 0.0
Perihelion: 30.14235551 +/- 0.0000
Aphelion: 48.22974047 +/- 0.0000
Period (y) 245.3044 +/- 0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -15.61545826 +/- 0.0000
Ecliptic Y -30.67461164 +/- 0.0000
Ecliptic Z 4.34404255 +/- 0.0000
Ecliptic XDOT 0.00240843 +/- 0.0000
Ecliptic YDOT -0.00192503 +/- 0.0000
Ecliptic ZDOT 0.00002948 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 34.69346643 +/- 0.0000
Geocenter to KBO 33.96520724 +/- 0.0000
# Hcoef: 9.02
The following table shows the complete astrometric record for 500885. 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 (500885) followed by the observatory code and reference code for the source of the astrometry.
2013 04 10.60926 16 14 19.589 -13 45 12.63 24.5r 500885 568 C~1XRf 2013 04 19.48015 16 13 43.594 -13 42 23.35 500885 568 C~1XRf 2013 04 19.53302 16 13 43.371 -13 42 22.18 23.7r 500885 568 C~1XRf 2013 05 08.46726 16 12 09.045 -13 36 23.69 24.2r 500885 568 C~1XRf 2013 05 08.51126 16 12 08.809 -13 36 22.85 24.3r 500885 568 C~1XRf 2013 05 08.55508 16 12 08.550 -13 36 22.05 24.3r 500885 568 C~1XRf 2013 05 09.56241 16 12 03.042 -13 36 03.44 24.9r 500885 568 C~1XRf 2013 05 10.56772 16 11 57.507 -13 35 45.60 24.3r 500885 568 C~1XRf 2013 06 06.35136 16 09 24.998 -13 28 50.70 500885 568 C~1XRf 2013 07 04.37987 16 07 04.424 -13 25 11.67 24.2r 500885 568 C~1XRg 2013 08 02.32237 16 05 40.742 -13 26 29.62 500885 568 C~1XRg 2014 02 28.57787 16 22 42.106 -14 16 45.19 24.6r 500885 568 C~2LSW 2014 03 06.63154 16 22 46.065 -14 15 38.87 24.8r 500885 568 C~1XRg 2014 03 07.60617 16 22 46.303 -14 15 27.08 500885 568 C~1XRg 2014 05 01.47315 16 20 16.693 -14 00 21.49 24.5r 500885 568 C~1XRg 2014 05 04.46995 16 20 01.387 -13 59 28.04 24.2r 500885 568 C~1XRg 2014 05 25.46370 16 18 05.133 -13 53 43.83 24.2r 500885 568 C~1XRg 2014 05 25.47257 16 18 05.071 -13 53 43.61 500885 568 C~1XRg 2014 06 02.46510 16 17 19.164 -13 51 53.43 24.7r 500885 568 C~1XRg 2014 07 18.37324 16 13 41.272 -13 47 27.79 24.9r 500885 568 C~1XRg 2015 03 22.58284 16 29 54.606 -14 32 02.24 24.7r 500885 568 C~1XRg 2016 05 29.37243 16 32 28.830 -14 33 33.33 24.3w 500885 568 C~2LSW 2016 06 03.41257 16 32 00.016 -14 32 34.12 24.1w 500885 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 0.09 0.00 -0.01
2 0.0243 0.00 -0.32 0.00 -0.13
3 0.0244 0.00 -0.09 0.00 0.03
4 0.0763 0.00 0.06 0.00 -0.06
5 0.0764 0.00 0.19 0.00 -0.02
6 0.0765 0.00 -0.05 0.00 -0.02
7 0.0793 0.00 0.03 0.00 0.28
8 0.0820 0.00 0.05 0.00 -0.02
9 0.1554 0.00 0.32 0.00 -0.14
10 0.2321 0.00 -0.04 0.00 -0.24
11 0.3113 0.00 -0.16 0.00 0.23
12 0.8870 0.00 -0.04 0.00 -0.01
13 0.9036 0.00 -0.07 0.00 -0.09
14 0.9062 0.00 0.06 0.00 0.07
15 1.0564 0.00 -0.08 0.00 0.17
16 1.0646 0.00 -0.09 0.00 0.14
17 1.1221 0.00 0.17 0.00 -0.16
18 1.1221 0.00 0.02 0.00 -0.07
19 1.1440 0.00 -0.03 0.00 0.02
20 1.2697 0.00 0.02 0.00 0.11
21 1.9465 0.00 0.17 0.00 -0.02
22 3.1342 0.00 -0.13 0.00 -0.09
23 3.1480 0.00 0.04 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.
500885 quality flag:3 Type: 3:2E 3:2E 3:2E axisobj 39.036 39.036 39.036 ecceobj 0.227 0.227 0.227 incobj 7.254 7.254 7.254 qmin 29.597 29.597 29.597 qmax 49.831 49.828 49.833 amean 39.455 39.455 39.455 amin 39.036 39.036 39.036 amax 39.933 39.931 39.940 emean 0.223 0.223 0.223 emin 0.195 0.196 0.195 emax 0.249 0.249 0.249 imean 7.275 7.278 7.276 imin 5.786 5.786 5.786 imax 8.752 8.752 8.752 excite_mean 0.257 0.257 0.257 fracstop 1.000 1.000 1.000 cjmean 2.976 2.976 2.976 libcent 0 180.4 180.1 180.2 libamp 0 65.8 65.5 65.5 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 202.8 202.7 202.8 kozaiamp 180.0 180.0 179.9