Orbit Fit and Astrometric record for 385185

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: 385185    
# Created Tue Oct 17 01:36:43 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   43 observations of   43
# Arc:  20.06y
# First observation: 1993/09/14
#  Last observation: 2013/10/06
# Chi-squared of fit:   787.12 DOF:   80 RMS:  0.76
# Min/Max residuals:    -1.75    1.43
# Exact a, adot, b, bdot, g, gdot:
  2.467974E-05  3.999616E-02  7.729100E-07 -2.596369E-03  3.275215E-02 -1.077920E-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
    0.030295  -10.208368   -0.037860    0.000566   -1.005887  2449244.837097
# Heliocentric elements and errors
Epoch:              2449244.5000  =  1993/09/14
Mean Anomaly:          354.31389 +/-     0.000
Argument of Peri:      188.15461 +/-     0.000
Long of Asc Node:      170.30341 +/-     0.000
Inclination:             3.72039 +/-     0.000
Eccentricity:         0.19574011 +/-    0.0000
Semi-Major Axis:     39.14102231 +/-    0.0000
Time of Perihelion: 2450657.2306 +/-       0.0
Perihelion:          31.47955414 +/-    0.0000
Aphelion:            46.80249048 +/-    0.0000
Period (y)              244.8818 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           31.04423003 +/-    0.0000
Ecliptic Y           -5.55720917 +/-    0.0000
Ecliptic Z            0.01619191 +/-    0.0000
Ecliptic XDOT         0.00050768 +/-    0.0000
Ecliptic YDOT         0.00330160 +/-    0.0000
Ecliptic ZDOT        -0.00021718 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   31.53772287 +/-    0.0000
Geocenter to KBO     30.53239523 +/-    0.0000
# Hcoef:  8.24

The following table shows the complete astrometric record for 385185. 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 (385185) followed by the observatory code and reference code for the source of the astrometry.

1993 09  14.3364   23 22 25.55   -04 00 52.9   23. R 385185    568  C22539      
1993 09  14.5241   23 22 24.47   -04 00 59.9         385185    568  C22539      
1993 09  15.4216   23 22 19.41   -04 01 33.4         385185    568  C22539      
1993 09  15.4723   23 22 19.12   -04 01 35.1         385185    568  C22539      
1993 09  16.4090   23 22 13.83   -04 02 10.0         385185    568  C22539      
1993 09  16.4216   23 22 13.74   -04 02 10.1         385185    568  C22539      
1993 09  17.4060   23 22 08.18   -04 02 46.8         385185    568  C22539      
1993 09  17.4183   23 22 08.07   -04 02 47.4         385185    568  C22539      
1993 09  20.0877   23 21 53.2    -04 04 29.          385185    950 YC22661      
1994 08  10.31135  23 34 09.94   -02 54 17.6         385185    809  C28036      
1994 08  10.42059  23 34 09.47   -02 54 20.5         385185    809  C28036      
1994 08  15.06744  23 33 48.46   -02 56 42.2         385185    950  C23955      
1994 08  15.13596  23 33 48.16   -02 56 44.3         385185    950  C23955      
1994 08  16.07619  23 33 43.78   -02 57 14.6         385185    950  C23955      
1994 08  16.13994  23 33 43.43   -02 57 15.9         385185    950  C23955      
1994 09  05.5318   23 31 57.44   -03 09 15.6   23. R 385185    568  A23904      
1994 09  05.5409   23 31 57.40   -03 09 16.0         385185    568  A23904      
1994 09  05.5503   23 31 57.35   -03 09 16.5         385185    568  A23904      
1994 09  05.5583   23 31 57.29   -03 09 16.7         385185    568  A23904      
1994 09  07.4460   23 31 46.73   -03 10 26.8         385185    568  A23904      
1994 09  07.4581   23 31 46.69   -03 10 27.0         385185    568  A23904      
1994 09  07.4763   23 31 46.54   -03 10 27.9         385185    568  A23904      
1994 09  07.4879   23 31 46.51   -03 10 28.3         385185    568  A23904      
1994 10  08.03252  23 28 57.97   -03 29 19.3   23.   385185    809  C24212      
1994 10  08.20222  23 28 57.09   -03 29 24.9         385185    809  C24212      
1994 10  09.15667  23 28 52.27   -03 29 57.4         385185    809  C24212      
1994 10  09.28323  23 28 51.61   -03 30 01.7         385185    809  C24212      
1995 06  22.451    23 44 16.85   -01 56 55.7         385185    675  C25381      
1995 06  23.463    23 44 17.64   -01 56 52.7         385185    675  C25381      
1995 06  24.450    23 44 18.33   -01 56 50.4         385185    675  C25381      
1995 06  25.453    23 44 18.86   -01 56 49.2         385185    675  C25381      
1995 10  23.3996   23 36 25.76   -02 51 17.8         385185    568  C26263      
1995 10  23.4324   23 36 25.59   -02 51 18.8         385185    568  C26263      
1996 09  10.27010  23 48 50.42   -01 39 39.2         385185    711  C27868      
1996 09  10.30139  23 48 50.23   -01 39 39.6         385185    711  C27868      
1996 09  10.30933  23 48 50.22   -01 39 39.2         385185    711  C27868      
1997 09  08.44866  23 57 43.50   -00 51 32.3         385185    675  C30579      
1997 09  08.49495  23 57 43.23   -00 51 34.3         385185    675  C30579      
1999 09  08.35271  00 15 09.01   +00 42 36.7         385185    568  Ch3030      
1999 09  08.40432  00 15 08.70   +00 42 35.0         385185    568  Ch3030      
2013 10  05.43350  02 12 34.18   +10 32 26.5   23.7R 385185    695  C~0zdB      
2013 10  05.49738  02 12 33.84   +10 32 24.7         385185    695  C~0zdB      
2013 10  06.44991  02 12 28.83   +10 31 55.6         385185    695  C~0zdB      

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    -0.23       0.00    -1.29
  2   0.0005      0.00    -0.73       0.00    -0.70
  3   0.0030      0.00    -0.47       0.00    -0.28
  4   0.0031      0.00    -0.42       0.00    -0.06
  5   0.0057      0.00    -0.31       0.00     0.40
  6   0.0057      0.00    -0.57       0.00     0.77
  7   0.0084      0.00    -0.50       0.00     1.17
  8   0.0084      0.00    -1.09       0.00     1.04
  9   0.0157      0.00     1.43       0.00    -0.32
 10   0.9034      0.00     0.57       0.00    -0.60
 11   0.9037      0.00     0.76       0.00    -0.26
 12   0.9164      0.00    -1.65       0.00     0.75
 13   0.9166      0.00    -1.27       0.00     0.82
 14   0.9192      0.00    -1.10       0.00     0.46
 15   0.9194      0.00    -1.75       0.00     1.21
 16   0.9752      0.00     1.06       0.00    -0.63
 17   0.9752      0.00     1.23       0.00    -0.69
 18   0.9753      0.00     1.28       0.00    -0.84
 19   0.9753      0.00     1.06       0.00    -0.74
 20   0.9805      0.00     0.75       0.00     0.14
 21   0.9805      0.00     1.18       0.00     0.40
 22   0.9805      0.00     0.50       0.00     0.18
 23   0.9806      0.00     1.04       0.00     0.22
 24   1.0642      0.00     0.76       0.00    -0.09
 25   1.0647      0.00     0.76       0.00     0.10
 26   1.0673      0.00     0.77       0.00    -0.01
 27   1.0676      0.00     0.57       0.00    -0.05
 28   1.7690      0.00     0.22       0.00    -0.38
 29   1.7717      0.00     0.39       0.00    -0.37
 30   1.7744      0.00     1.02       0.00    -0.26
 31   1.7772      0.00     0.81       0.00    -0.55
 32   2.1056      0.00    -0.11       0.00     0.51
 33   2.1057      0.00    -0.51       0.00     0.46
 34   2.9896      0.00    -1.32       0.00    -0.93
 35   2.9896      0.00    -1.51       0.00    -0.14
 36   2.9897      0.00    -0.98       0.00     0.56
 37   3.9839      0.00     0.76       0.00    -0.33
 38   3.9840      0.00     0.55       0.00    -0.60
 39   5.9822      0.00     0.09       0.00     0.62
 40   5.9824      0.00    -0.40       0.00     0.80
 41  20.0578      0.00    -0.15       0.00    -0.15
 42  20.0579      0.00    -0.11       0.00     0.01
 43  20.0605      0.00     0.49       0.00     0.12

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.

385185    quality flag:3

Type:           3:2E      3:2E      3:2E

axisobj        39.582    39.582    39.582
ecceobj         0.205     0.205     0.205
incobj          3.706     3.706     3.706
qmin           30.997    30.972    30.975
qmax           48.644    48.757    48.753
amean          39.457    39.457    39.457
amin           38.917    38.917    38.910
amax           40.036    40.076    40.065
emean           0.199     0.199     0.199
emin            0.182     0.182     0.182
emax            0.216     0.217     0.217
imean           4.088     3.917     3.987
imin            3.239     3.145     3.239
imax            4.722     4.539     4.581
excite_mean     0.211     0.211     0.211
fracstop        1.000     1.000     1.000
cjmean          3.001     3.001     3.001

libcent 0       179.7     179.8     178.6
libamp  0       123.3     125.4     125.1
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       179.1     155.7     152.7
kozaiamp        180.0     180.0     180.0