Orbit Fit and Astrometric record for 48639

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 Sat Jul 26 01:36:34 2014
# 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:
  6.651798E-07  2.599564E-02  1.695413E-06 -5.931975E-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:     52.56607537 +/-    0.0000
Time of Perihelion: 2440966.0578 +/-       0.0
Perihelion:          40.00498380 +/-    0.0000
Aphelion:            65.12716693 +/-    0.0000
Period (y)              381.1242 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           38.59421219 +/-    0.0000
Ecliptic Y           15.82085889 +/-    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     40.77819736 +/-    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    -0.25       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.