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: 48639
# Created Sun May 19 01:36:26 2013
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 46 observations of 48
# Arc: 8.08y
# First observation: 1995/09/24
# Last observation: 2003/10/22
# Chi-squared of fit: 426.41 DOF: 86 RMS: 0.54
# Min/Max residuals: -1.17 1.65
# Exact a, adot, b, bdot, g, gdot:
6.646128E-07 2.599564E-02 1.695416E-06 -5.931974E-05 2.452287E-02 3.388572E-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
0.213051 22.802163 0.364736 0.003398 -0.931682 2449984.952878
# Heliocentric elements and errors
Epoch: 2449984.5000 = 1995/09/24
Mean Anomaly: 23.32262 +/- 0.000
Argument of Peri: 84.45014 +/- 0.000
Long of Asc Node: 259.82899 +/- 0.000
Inclination: 0.24699 +/- 0.000
Eccentricity: 0.23895814 +/- 0.0000
Semi-Major Axis: 52.56607562 +/- 0.0000
Time of Perihelion: 2440966.0580 +/- 0.0
Perihelion: 40.00498384 +/- 0.0000
Aphelion: 65.12716740 +/- 0.0000
Period (y) 381.1242 +/- 0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 38.59421220 +/- 0.0000
Ecliptic Y 15.82085888 +/- 0.0000
Ecliptic Z 0.15171311 +/- 0.0000
Ecliptic XDOT -0.00076855 +/- 0.0000
Ecliptic YDOT 0.00282286 +/- 0.0000
Ecliptic ZDOT -0.00000541 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 41.71125465 +/- 0.0000
Geocenter to KBO 40.77819737 +/- 0.0000
# Hcoef: 5.26
The following table shows the complete astrometric record for 48639. 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 (48639) followed by the observatory code and reference code for the source of the astrometry.
1995 09 24.45217 01 24 02.95 +09 03 57.0 21.8V 48639 691 Cb3482 1995 09 24.47331 01 24 02.86 +09 03 56.3 21.5V 48639 691 Cb3482 1995 09 24.49443 01 24 02.78 +09 03 56.1 21.4V 48639 691 Cb3482 1995 10 15.25411 01 22 30.99 +08 54 51.7 21.5V 48639 691 Ca4783 1995 10 15.27535 01 22 30.87 +08 54 50.7 21.7V 48639 691 Ca4783 1995 10 15.29636 01 22 30.77 +08 54 50.0 21.4V 48639 691 Ca4783 1995 10 21.18471 01 22 03.92 +08 52 10.7 21.5V 48639 691 Ca4783 1995 10 21.20588 01 22 03.81 +08 52 10.4 21.4V 48639 691 Ca4783 1995 10 21.22687 01 22 03.71 +08 52 09.7 21.3V 48639 691 Ca4783 1995 10 27.21585 01 21 36.90 +08 49 29.3 21.5V 48639 691 Ca4783 1995 10 27.23689 01 21 36.79 +08 49 28.7 21.3V 48639 691 Ca4783 1995 10 27.25802 01 21 36.72 +08 49 28.0 21.4V 48639 691 Ca4783 1995 11 14.09525 01 20 22.20 +08 42 01.1 21.7V 48639 691 Ca4783 1995 11 14.11642 01 20 22.15 +08 42 00.8 21.9V 48639 691 Ca4783 1995 11 14.13776 01 20 22.05 +08 42 00.3 21.6V 48639 691 Ca4783 1995 11 19.07672 01 20 03.76 +08 40 11.3 21.8V 48639 691 Ca4783 1995 11 19.09827 01 20 03.74 +08 40 10.5 21.7V 48639 691 Ca4783 1995 11 19.11937 01 20 03.69 +08 40 09.7 22.3V 48639 691 Ca4783 1995 11 25.06991 01 19 43.62 +08 38 08.1 21.2V 48639 691 Ca4783 1995 11 25.09127 01 19 43.47 +08 38 07.7 21.4V 48639 691 Ca4783 1995 11 25.11224 01 19 43.38 +08 38 07.0 21.5V 48639 691 Ca4783 1996 10 07.23408 01 28 40.10 +09 30 57.0 21.6V 48639 691 Cb7368 1996 10 07.25520 01 28 39.99 +09 30 56.5 22.1V 48639 691 Cb7368 1996 10 07.27624 01 28 39.92 +09 30 56.0 21.8V 48639 691 Cb7368 1996 10 16.29287 01 27 59.06 +09 26 56.1 21.7V 48639 691 Cb7368 1996 10 16.31418 01 27 58.96 +09 26 55.6 21.8V 48639 691 Cb7368 1996 10 16.33629 01 27 58.85 +09 26 54.8 21.8V 48639 691 Cb7368 1996 11 07.21873 01 26 22.08 +09 17 23.3 21.9V 48639 691 Cb7368 1996 11 07.24013 01 26 22.00 +09 17 23.3 21.6V 48639 691 Cb7368 1996 11 07.26153 01 26 21.96 +09 17 22.6 21.3V 48639 691 Cb7368 2000 10 25.30600 01 49 34.91 +11 29 25.2 48639 684 Cc0649 2000 10 25.35496 01 49 34.70 +11 29 23.3 48639 684 Cc0649 2000 10 26.30274 01 49 30.36 +11 28 59.2 48639 684 Cc0649 2000 10 26.35363 01 49 30.16 +11 28 58.1 48639 684 Cc0649 2001 02 15.82633 01 47 01.68 +11 14 40.8 48639 950 Cc6319 2001 02 16.83519 01 47 05.12 +11 14 59.3 20.9R 48639 950 Cc6319 2001 08 20.08746 01 58 57.94 +12 20 24.8 48639 493 Cd7380 2001 08 21.08238 01 58 56.56 +12 20 16.7 20.7R 48639 493 Cd7380 2002 10 29.26660 02 00 19.88 +12 27 36.6 21.3V 48639 291 Cg5290 2002 10 29.29087 02 00 19.79 +12 27 35.8 21.5V 48639 291 Cg5290 2002 10 29.31439 02 00 19.67 +12 27 35.3 21.5V 48639 291 Cg5290 2003 10 19.34977 02 06 34.36 +13 00 31.5 21.3V 48639 691 Cj0807 2003 10 19.37781 02 06 34.22 +13 00 31.0 21.5V 48639 691 Cj0807 2003 10 19.40573 02 06 34.07 +13 00 29.8 21.8V 48639 691 Cj0807 2003 10 22.28102 02 06 21.01 +12 59 21.1 20.2R 48639 695 Cj4264 2003 10 22.39451 02 06 20.49 +12 59 18.4 48639 695 Cj4264 2008 08 29.16678 02 36 11.73 +15 26 41.7 20.9R 48639 950 C~01oB 2008 08 29.18468 02 36 11.70 +15 26 41.5 20.9R 48639 950 C~01oB
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 -0.06 0.00 -0.27 2 0.0001 0.00 ( 3.29) 0.00 ( 0.74) 3 0.0001 0.00 ( 3.43) 0.00 ( 1.06) 4 0.0570 0.00 1.65 0.00 0.20 5 0.0570 0.00 1.33 0.00 -0.22 6 0.0571 0.00 1.29 0.00 -0.35 7 0.0732 0.00 -0.19 0.00 -0.20 8 0.0732 0.00 -0.38 0.00 0.07 9 0.0733 0.00 -0.43 0.00 -0.06 10 0.0897 0.00 0.79 0.00 0.15 11 0.0898 0.00 0.56 0.00 0.10 12 0.0898 0.00 0.94 0.00 -0.03 13 0.1387 0.00 -0.64 0.00 -0.17 14 0.1387 0.00 -0.16 0.00 0.01 15 0.1388 0.00 -0.42 0.00 0.00 16 0.1523 0.00 -1.17 0.00 1.08 17 0.1524 0.00 -0.30 0.00 0.74 18 0.1524 0.00 0.10 0.00 0.39 19 0.1687 0.00 0.96 0.00 0.61 20 0.1688 0.00 -0.24 0.00 0.62 21 0.1688 0.00 -0.57 0.00 0.32 22 1.0370 0.00 0.08 0.00 -0.42 23 1.0371 0.00 -0.12 0.00 -0.37 24 1.0372 0.00 0.26 0.00 -0.32 25 1.0618 0.00 0.02 0.00 -0.53 26 1.0619 0.00 0.00 0.00 -0.45 27 1.0620 0.00 -0.11 0.00 -0.66 28 1.1219 0.00 -1.03 0.00 -0.94 29 1.1219 0.00 -0.87 0.00 -0.41 30 1.1220 0.00 -0.12 0.00 -0.58 31 5.0865 0.00 -0.48 0.00 0.73 32 5.0867 0.00 -0.23 0.00 0.07 33 5.0893 0.00 -0.53 0.00 0.02 34 5.0894 0.00 0.00 0.00 0.22 35 5.3973 0.00 0.43 0.00 -0.18 36 5.4001 0.00 0.75 0.00 -0.49 37 5.9045 0.00 -1.10 0.00 1.15 38 5.9073 0.00 0.25 0.00 0.75 39 7.0960 0.00 -0.12 0.00 0.41 40 7.0961 0.00 0.22 0.00 0.21 41 7.0961 0.00 0.06 0.00 0.29 42 8.0682 0.00 0.48 0.00 0.07 43 8.0682 0.00 0.32 0.00 0.24 44 8.0683 0.00 -0.01 0.00 -0.29 45 8.0762 0.00 0.25 0.00 -0.10 46 8.0765 0.00 0.35 0.00 -0.07 47 12.9301 0.00 0.00 0.00 -0.45 48 12.9301 0.00 -0.05 0.00 -0.54
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.
48639 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 53.138 53.138 53.138 ecceobj 0.244 0.244 0.244 incobj 0.243 0.243 0.243 qmin 39.406 39.427 39.399 qmax 66.411 66.390 66.356 amean 52.580 52.579 52.578 amin 52.074 52.067 52.080 amax 53.195 53.185 53.174 emean 0.237 0.237 0.237 emin 0.227 0.226 0.227 emax 0.249 0.248 0.248 imean 1.882 1.884 1.883 imin 1.655 1.655 1.654 imax 2.131 2.131 2.133 excite_mean 0.240 0.240 0.239 fracstop 1.000 1.000 1.000 cjmean 3.138 3.138 3.138 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 184.4 184.0 184.3 kozaiamp 180.0 180.0 180.0