Orbit Fit and Astrometric record for 95DC2

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: 95DC2     
# Created Wed Dec 13 02:36:55 2017
# Orbit generated from Bernstein formalism
# Fitting   64 observations of   64
# Arc:  19.98y
# First observation: 1995/02/24
#  Last observation: 2015/02/18
Preliminary a, adot, b, bdot, g, gdot:
  -0.002017   0.022284  -0.000079   0.000913   0.021222   0.000000
# Chi-squared of fit:   780.40 DOF:  122 RMS:  0.62
# Min/Max residuals:    -2.28    1.56
# Exact a, adot, b, bdot, g, gdot:
  9.844971E-06  2.065027E-02 -5.733420E-06  8.447646E-04  2.251885E-02 -1.143810E-03
# Covariance matrix:
  5.0330E-14 -1.6802E-14  5.5768E-16 -6.0784E-16  3.1414E-14 -3.4538E-14
 -1.6802E-14  1.4337E-14 -5.2089E-16  5.6893E-16 -9.3815E-15  3.2226E-14
  5.5768E-16 -5.2089E-16  2.9524E-14 -2.1126E-15  3.5099E-16 -1.2245E-15
 -6.0784E-16  5.6893E-16 -2.1126E-15  6.5212E-16 -3.7792E-16  1.3375E-15
  3.1414E-14 -9.3815E-15  3.5099E-16 -3.7792E-16  9.6849E-14 -2.1867E-14
 -3.4538E-14  3.2226E-14 -1.2245E-15  1.3375E-15 -2.1867E-14  7.5757E-14
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.047014  152.994262   -0.034925   -0.000833   -0.993427  2449772.892208
# Heliocentric elements and errors
Epoch:              2449770.5000  =  1995/02/22
Mean Anomaly:          245.84417 +/-     0.039
Argument of Peri:      119.50834 +/-     0.032
Long of Asc Node:      154.17955 +/-     0.000
Inclination:             2.34059 +/-     0.000
Eccentricity:         0.06429204 +/-    0.0000
Semi-Major Axis:     44.09081192 +/-    0.0024
Time of Perihelion: 2483679.5933 +/-      11.1
Perihelion:          41.25612359 +/-    0.0026
Aphelion:            46.92550024 +/-    0.0029
Period (y)              292.7725 +/-      0.02
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -40.46494212 +/-    0.0005
Ecliptic Y           20.57654001 +/-    0.0003
Ecliptic Z           -0.03669009 +/-    0.0000
Ecliptic XDOT        -0.00100925 +/-    0.0000
Ecliptic YDOT        -0.00230138 +/-    0.0000
Ecliptic ZDOT         0.00010264 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   45.39611091 +/-    0.0005
Geocenter to KBO     44.40724783 +/-    0.0006
# Hcoef:  7.38

The following table shows the complete astrometric record for 95DC2. 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 (95DC2) followed by the observatory code and reference code for the source of the astrometry.

1995 02  24.3915   10 19 41.32   +10 21 43.8   22.5R 95DC2     568  A24813      
1995 02  24.4349   10 19 41.12   +10 21 45.2         95DC2     568  A24813      
1995 02  24.4976   10 19 40.86   +10 21 46.7         95DC2     568  A24813      
1995 02  24.5828   10 19 40.46   +10 21 48.8         95DC2     568  A24813      
1995 02  24.5874   10 19 40.44   +10 21 49.0         95DC2     568  A24813      
1995 02  26.4260   10 19 32.47   +10 22 34.6         95DC2     568  A24813      
1995 02  26.4482   10 19 32.37   +10 22 35.5         95DC2     568  A24813      
1995 02  26.4750   10 19 32.27   +10 22 36.0         95DC2     568  A24813      
1995 03  24.2503   10 17 47.12   +10 32 45.9         95DC2     568  C26263      
1995 03  24.4211   10 17 46.48   +10 32 49.5         95DC2     568  C26263      
1995 03  30.42587  10 17 25.52   +10 34 52.6         95DC2     413  C24958      
1995 03  30.52515  10 17 25.20   +10 34 54.5         95DC2     413  C24958      
1995 04  01.9000   10 17 17.40   +10 35 39.3   23.8R 95DC2     950  C25029      
1995 04  01.9533   10 17 17.21   +10 35 40.4         95DC2     950  C25182      
1995 04  02.0052   10 17 17.04   +10 35 41.3         95DC2     950  C25182      
1995 04  05.25593  10 17 06.93   +10 36 40.1         95DC2     568  C26263      
1995 04  05.26130  10 17 06.93   +10 36 40.3         95DC2     568  C26263      
1995 04  05.37953  10 17 06.57   +10 36 42.3         95DC2     568  C26263      
1995 04  06.00733  10 17 04.76   +10 36 53.3   23. R 95DC2     809  C25179      
1995 04  06.04816  10 17 04.63   +10 36 54.0         95DC2     809  C25179      
1995 04  06.06122  10 17 04.58   +10 36 54.2         95DC2     809  C25179      
1995 04  06.11338  10 17 04.42   +10 36 55.2         95DC2     809  C25179      
1995 04  06.17926  10 17 04.23   +10 36 56.3         95DC2     809  C25179      
1995 04  06.24368  10 17 04.00   +10 36 57.2         95DC2     568  C26263      
1995 04  06.36550  10 17 03.59   +10 36 59.3         95DC2     568  C26263      
1995 04  06.99368  10 17 01.84   +10 37 10.0         95DC2     809  C25179      
1995 04  07.00654  10 17 01.80   +10 37 10.4         95DC2     809  C25179      
1995 04  07.01964  10 17 01.75   +10 37 10.5         95DC2     809  C25179      
1995 04  07.04636  10 17 01.68   +10 37 10.9         95DC2     809  C25179      
1995 04  07.05921  10 17 01.64   +10 37 11.1         95DC2     809  C25179      
1995 04  07.13483  10 17 01.40   +10 37 12.6         95DC2     809  C25179      
1995 04  07.14769  10 17 01.38   +10 37 12.8         95DC2     809  C25179      
1995 04  07.16053  10 17 01.35   +10 37 12.8         95DC2     809  C25179      
1995 12  23.51505  10 27 47.10   +09 37 39.4         95DC2     568  C26491      
1995 12  23.54509  10 27 47.03   +09 37 39.8         95DC2     568  C26491      
1995 12  23.57388  10 27 46.98   +09 37 40.1         95DC2     568  C26491      
1995 12  24.50699  10 27 45.57   +09 37 48.7         95DC2     568  C26491      
1995 12  24.54705  10 27 45.49   +09 37 49.1         95DC2     568  C26491      
1996 04  09.20105  10 21 25.04   +10 15 19.2         95DC2     675  C27019      
1996 04  09.26745  10 21 24.90   +10 15 20.4         95DC2     675  C27019      
1997 02  09.27953  10 29 49.76   +09 29 16.9         95DC2     697  C29057      
1997 02  09.30955  10 29 49.67   +09 29 17.7         95DC2     697  C29057      
1997 02  10.32689  10 29 45.44   +09 29 42.8         95DC2     697  C29057      
1997 02  10.35807  10 29 45.31   +09 29 43.6         95DC2     697  C29057      
1997 03  04.93450  10 28 08.11   +09 39 21.6         95DC2     950  C30063      
1997 03  05.92279  10 28 03.71   +09 39 45.9         95DC2     950  C30063      
1998 05  23.90975  10 29 28.86   +09 35 11.5         95DC2     950  Ca1684      
1998 05  23.95657  10 29 28.85   +09 35 10.9         95DC2     950  Ca1684      
1998 05  24.90046  10 29 29.30   +09 35 09.3         95DC2     950  Ca1684      
1999 01  23.45493  10 39 59.78   +08 35 16.6         95DC2     705  Ca3582      
1999 01  23.48912  10 39 59.67   +08 35 17.1         95DC2     705  Ca3582      
1999 02  11.42887  10 38 47.69   +08 42 38.6   23.5R 95DC2     568  Ca4114      
1999 02  11.50747  10 38 47.34   +08 42 40.2   23.5R 95DC2     568  Ca4114      
1999 02  17.55141  10 38 21.96   +08 45 16.1   23.5R 95DC2     568  Ca4114      
1999 02  17.56301  10 38 21.93   +08 45 16.0   23.5R 95DC2     568  Ca4114      
2001 02  17.07247  10 47 28.04   +07 56 52.1         95DC2     950  Cc6317      
2001 02  17.12443  10 47 27.80   +07 56 53.8         95DC2     950  Cc6317      
2001 02  17.17417  10 47 27.60   +07 56 54.9         95DC2     950  Cc6317      
2014 03  27.102477 11 44 28.54   +02 38 12.1   24.1r 95DC2     309  C~2HNd      
2014 03  27.107176 11 44 28.51   +02 38 12.3   23.9r 95DC2     309  C~2HNd      
2014 03  27.116539 11 44 28.47   +02 38 12.6   24.2r 95DC2     309  C~2HNd      
2014 03  27.121215 11 44 28.45   +02 38 12.7   24.0r 95DC2     309  C~2HNd      
2015 02  18.29722  11 51 39.55   +01 54 12.8   23.5R 95DC2     695  C~1M5z      
2015 02  18.39059  11 51 39.17   +01 54 15.1         95DC2     695  C~1M5z      

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     0.96       0.00     1.30
  2   0.0001     -3.26     0.75       0.24     1.54
  3   0.0003     -7.38     1.02       0.26     1.56
  4   0.0005    -13.64     0.71       0.09     1.39
  5   0.0005    -13.99     0.69       0.17     1.47
  6   0.0056   -140.11     1.25       0.35     0.69
  7   0.0056   -141.82     1.11       0.66     1.00
  8   0.0057   -143.37     1.43       0.59     0.93
  9   0.0763  -1810.02     0.68      12.08    -0.37
 10   0.0767  -1820.12     0.62      12.05    -0.42
 11   0.0932  -2152.81     0.29      16.09     0.36
 12   0.0935  -2157.89     0.55      16.17     0.43
 13   0.1000  -2281.33     0.02      16.75    -0.04
 14   0.1001  -2284.34    -0.24      16.78    -0.03
 15   0.1002  -2287.00    -0.22      16.72    -0.09
 16   0.1091  -2447.26    -0.73      18.18    -0.35
 17   0.1092  -2447.33    -0.54      18.37    -0.17
 18   0.1095  -2453.00    -0.47      18.33    -0.22
 19   0.1112  -2481.86     0.24      19.04    -0.03
 20   0.1113  -2483.90     0.16      19.01    -0.07
 21   0.1113  -2484.66     0.02      18.93    -0.15
 22   0.1115  -2487.22    -0.04      19.02    -0.07
 23   0.1117  -2490.23     0.09      19.04    -0.05
 24   0.1118  -2493.72    -0.61      18.67    -0.38
 25   0.1122  -2500.12    -1.20      18.46    -0.60
 26   0.1139  -2528.04    -0.14      19.21    -0.37
 27   0.1139  -2528.74    -0.23      19.37    -0.21
 28   0.1140  -2529.46    -0.34      19.20    -0.38
 29   0.1140  -2530.57    -0.20      19.20    -0.39
 30   0.1141  -2531.19    -0.22      19.18    -0.41
 31   0.1143  -2535.03    -0.52      19.31    -0.29
 32   0.1143  -2535.38    -0.26      19.39    -0.21
 33   0.1144  -2535.79    -0.07      19.23    -0.37
 34   0.8272   7649.96    -0.50     142.38    -0.62
 35   0.8273   7648.85    -0.85     142.37    -0.64
 36   0.8273   7648.05    -0.92     142.38    -0.63
 37   0.8299   7625.46    -0.42     142.75    -0.71
 38   0.8300   7624.22    -0.61     142.69    -0.78
 39   1.1220   1566.35    -0.80     193.77    -0.17
 40   1.1222   1563.99    -0.16     194.14     0.20
 41   1.9600   9525.46    -0.44     340.41    -0.00
 42   1.9601   9523.93     0.05     340.67     0.25
 43   1.9629   9456.36     0.47     341.02     0.11
 44   1.9629   9454.27     0.50     341.06     0.14
 45   2.0248   7902.03    -0.13     351.39    -0.43
 46   2.0275   7832.48    -2.28     350.17    -2.11
 47   3.2430   9106.82     0.22     556.88    -0.27
 48   3.2432   9106.90     0.02     556.27    -0.88
 49   3.2457   9113.70    -0.12     557.22    -0.25
 50   3.9126  19167.58    -0.16     682.33    -0.07
 51   3.9127  19165.86     0.03     682.18    -0.22
 52   3.9645  18001.41     0.06     692.92    -0.14
 53   3.9647  17995.96    -0.05     692.47    -0.60
 54   3.9813  17585.64    -0.17     696.72     0.58
 55   3.9813  17585.26     0.26     696.46     0.32
 56   5.9813  26285.93     0.62    1053.28     0.45
 57   5.9815  26281.92     0.23    1053.50     0.67
 58   5.9816  26278.70     0.48    1053.39     0.56
 59  19.0848  85006.66     0.34    3585.57     0.02
 60  19.0848  85006.09     0.15    3585.57     0.02
 61  19.0848  85005.30     0.13    3585.61     0.07
 62  19.0848  85004.93     0.14    3585.57     0.04
 63  19.9833  93288.33    -0.11    3794.28     0.10
 64  19.9836  93280.94    -0.63    3794.06    -0.14

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.

95DC2    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.962    43.969    43.955
ecceobj         0.061     0.061     0.061
incobj          2.349     2.349     2.349
qmin           40.828    40.833    40.803
qmax           47.696    47.708    47.711
amean          44.159    44.166    44.151
amin           43.811    43.811    43.808
amax           44.520    44.530    44.510
emean           0.057     0.057     0.057
emin            0.041     0.040     0.040
emax            0.071     0.072     0.073
imean           2.359     2.357     2.361
imin            1.689     1.689     1.689
imax            2.999     2.995     3.003
excite_mean     0.071     0.070     0.071
fracstop        1.000     1.000     1.000
cjmean          3.098     3.098     3.097

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       171.5     171.8     171.6
kozaiamp        180.0     180.0     180.0