Orbit Fit and Astrometric record for 385458

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: 385458    
# Created Thu Nov 15 02:06:59 2018
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   71 observations of   71
# Arc:  13.99y
# First observation: 2003/09/25
#  Last observation: 2017/09/22
# Chi-squared of fit:    98.75 DOF:  136 RMS:  0.21
# Min/Max residuals:    -0.82    0.58
# Exact a, adot, b, bdot, g, gdot:
  1.521859E-05  2.119636E-02  1.245207E-06  1.880165E-03  2.276718E-02 -3.716726E-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
    0.440729   -8.268765   -0.173622    0.007654   -0.990759  2452907.904493
# Heliocentric elements and errors
Epoch:              2452908.5000  =  2003/09/26
Mean Anomaly:          286.33956 +/-     0.000
Argument of Peri:       98.16020 +/-     0.000
Long of Asc Node:      347.11878 +/-     0.000
Inclination:             5.09775 +/-     0.000
Eccentricity:         0.17124948 +/-    0.0000
Semi-Major Axis:     45.81096916 +/-    0.0000
Time of Perihelion: 2476081.6184 +/-       0.0
Perihelion:          37.96586469 +/-    0.0000
Aphelion:            53.65607363 +/-    0.0000
Period (y)              310.0719 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           44.46756400 +/-    0.0000
Ecliptic Y           -6.28323258 +/-    0.0000
Ecliptic Z            0.33792586 +/-    0.0000
Ecliptic XDOT        -0.00008241 +/-    0.0000
Ecliptic YDOT         0.00258108 +/-    0.0000
Ecliptic ZDOT         0.00022282 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   44.91066102 +/-    0.0000
Geocenter to KBO     43.92303754 +/-    0.0000
# Hcoef:  7.17

The following table shows the complete astrometric record for 385458. 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 (385458) followed by the observatory code and reference code for the source of the astrometry.

2003 09  25.40375  23 28 55.50   -02 52 28.1         385458    568  Cq9897      
2003 09  25.46139  23 28 55.26   -02 52 29.5         385458    568  Cq9897      
2003 09  25.52378  23 28 55.01   -02 52 31.3         385458    568  Cq9897      
2003 09  27.36229  23 28 47.40   -02 53 18.2   23.6g 385458    568  Cq9897      
2003 09  27.41465  23 28 47.19   -02 53 19.4   23.8g 385458    568  Cq9897      
2003 09  27.46965  23 28 46.96   -02 53 20.7   23.2g 385458    568  Cq9897      
2004 09  07.34130  23 34 26.62   -02 10 12.5   22.5R 385458    695  Cq9897      
2004 09  07.42784  23 34 26.25   -02 10 14.8   22.2R 385458    695  Cq9897      
2004 09  11.32843  23 34 09.84   -02 11 55.8         385458    695  Cq9897      
2004 09  11.37361  23 34 09.66   -02 11 57.0         385458    695  Cq9897      
2004 09  11.41886  23 34 09.48   -02 11 58.2         385458    695  Cq9897      
2005 07  08.53283  23 41 46.23   -01 17 31.1   22.8r 385458    568  Cq9897      
2005 07  08.58383  23 41 46.16   -01 17 31.4   23.1r 385458    568  Cq9897      
2005 07  09.55654  23 41 45.11   -01 17 36.4   22.8r 385458    568  Cq9897      
2005 10  03.23850  23 36 59.07   -01 46 15.1   23.0R 385458    675  Cq9897      
2005 10  04.23386  23 36 55.06   -01 46 40.1         385458    675  Cq9897      
2007 05  21.26420  23 49 32.56   -00 14 58.3   23.9R 385458    250  S~06Ae      
2007 05  21.27114  23 49 32.58   -00 14 58.1         385458    250  S~06Ae      
2007 05  21.27809  23 49 32.60   -00 14 58.0         385458    250  S~06Ae      
2007 05  21.33364  23 49 32.76   -00 14 56.8         385458    250  S~06Ae      
2007 09  11.39453  23 47 18.72   -00 25 28.0   23.1r 385458    695  Cv8591      
2007 09  11.44579  23 47 18.50   -00 25 29.5   22.8r 385458    695  Cv8591      
2007 09  17.24847  23 46 53.88   -00 28 01.7         385458    675  Cy6717      
2007 09  17.25468  23 46 53.86   -00 28 01.8         385458    675  Cy6717      
2007 09  17.29518  23 46 53.70   -00 28 03.1         385458    675  Cy6717      
2007 09  17.30001  23 46 53.66   -00 28 03.4   23.5R 385458    675  Cy6717      
2007 11  09.15799  23 43 39.95   -00 48 27.0         385458    695  Cy4000      
2007 11  09.24818  23 43 39.73   -00 48 28.4         385458    695  Cy4000      
2010 09  07.48341  00 00 59.550  +01 24 57.30        385458    675  C~2mgL      
2013 10  05.29608  00 12 43.91   +03 03 35.7   23.5R 385458    695  C~0zdW      
2013 10  05.34476  00 12 43.72   +03 03 34.9         385458    695  C~0zdW      
2013 10  06.31350  00 12 39.54   +03 03 08.3         385458    695  C~0zdW      
2015 06  23.54553  00 26 13.268  +04 40 22.41  23.6r 385458    568  C~2mgL      
2015 07  14.59595  00 26 21.207  +04 42 32.67  23.6r 385458    568  C~2mgL      
2015 07  19.57506  00 26 17.673  +04 42 28.48  23.5r 385458    568  C~2mgL      
2015 08  11.48002  00 25 36.613  +04 39 24.23  23.4r 385458    568  C~2mgL      
2015 08  11.52447  00 25 36.495  +04 39 23.30  23.7r 385458    568  C~2mgL      
2015 09  08.38855  00 24 01.477  +04 30 28.24  23.4r 385458    568  C~2mgL      
2015 09  08.49278  00 24 01.044  +04 30 25.79  23.6r 385458    568  C~2mgL      
2015 09  08.53500  00 24 00.871  +04 30 24.79  23.4r 385458    568  C~2mgL      
2015 09  09.51188  00 23 56.903  +04 30 01.24  23.9w 385458    568  C~2mgL      
2015 09  10.45287  00 23 53.056  +04 29 38.51  23.5w 385458    568  C~2mgL      
2015 09  16.43732  00 23 27.969  +04 27 08.59  23.5w 385458    568  C~2mgL      
2015 10  03.36404  00 22 14.085  +04 19 36.25  23.7w 385458    568  C~2mgL      
2015 10  07.33325  00 21 56.706  +04 17 47.75  23.2r 385458    568  C~2mgL      
2015 10  07.39134  00 21 56.447  +04 17 46.09  23.4r 385458    568  C~2mgL      
2015 11  07.22874  00 19 55.614  +04 04 48.32  23.8w 385458    568  C~2mgL      
2015 11  07.28121  00 19 55.434  +04 04 47.23  23.9w 385458    568  C~2mgL      
2015 11  10.35841  00 19 45.738  +04 03 42.56  24.0w 385458    568  C~2mgL      
2015 12  07.30513  00 18 49.455  +03 57 08.31  23.9w 385458    568  C~2mgL      
2016 01  01.23434  00 18 51.449  +03 56 41.89  23.8w 385458    568  C~2mgL      
2016 09  06.45273  00 28 49.565  +05 08 32.19  23.9w 385458    568  C~2mgL      
2016 09  06.49401  00 28 49.396  +05 08 31.31  23.9w 385458    568  C~2mgL      
2016 09  07.45091  00 28 45.576  +05 08 08.94  23.8w 385458    568  C~2mgL      
2016 09  07.45899  00 28 45.544  +05 08 08.80  23.7w 385458    568  C~2mgL      
2016 09  07.49637  00 28 45.389  +05 08 07.86  23.9w 385458    568  C~2mgL      
2016 09  07.50445  00 28 45.357  +05 08 07.80  23.9w 385458    568  C~2mgL      
2016 09  26.45157  00 27 24.679  +05 00 04.86  23.5w 385458    568  C~2mgL      
2016 09  26.45563  00 27 24.659  +05 00 04.72  23.6w 385458    568  C~2mgL      
2016 09  26.52564  00 27 24.335  +05 00 02.80  23.4w 385458    568  C~2mgL      
2016 10  30.34461  00 25 01.979  +04 45 04.09        385458    568  C~2mgL      
2016 11  03.29848  00 24 47.729  +04 43 30.66  23.6w 385458    568  C~2mgL      
2016 11  03.35091  00 24 47.536  +04 43 29.42  23.6w 385458    568  C~2mgL      
2016 12  24.26796  00 23 21.414  +04 33 06.23  23.7w 385458    568  C~2mgL      
2016 12  24.27431  00 23 21.409  +04 33 06.08  23.6w 385458    568  C~2mgL      
2017 01  02.25760  00 23 28.988  +04 33 38.69  23.4w 385458    568  C~2mgL      
2017 01  02.26396  00 23 28.996  +04 33 38.82        385458    568  C~2mgL      
2017 01  26.23696  00 24 23.518  +04 38 50.75  23.5w 385458    568  C~2mgL      
2017 01  29.22410  00 24 33.554  +04 39 51.28  23.8w 385458    568  C~2mgL      
2017 09  15.44018  00 32 59.680  +05 42 47.06  23.4w 385458    568  C~2mgL      
2017 09  22.50534  00 32 29.222  +05 39 45.61  23.8w 385458    568  C~2mgL      

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    -0.10       0.00    -0.03
  2   0.0002      0.00    -0.05       0.00     0.05
  3   0.0003      0.00     0.14       0.00    -0.16
  4   0.0054      0.00    -0.39       0.00    -0.19
  5   0.0055      0.00    -0.26       0.00    -0.06
  6   0.0057      0.00    -0.25       0.00     0.04
  7   0.9526      0.00     0.29       0.00     0.19
  8   0.9528      0.00     0.26       0.00     0.11
  9   0.9635      0.00     0.04       0.00     0.06
 10   0.9636      0.00     0.25       0.00     0.04
 11   0.9638      0.00     0.46       0.00     0.01
 12   1.7854      0.00     0.19       0.00     0.05
 13   1.7856      0.00     0.00       0.00    -0.00
 14   1.7882      0.00     0.26       0.00    -0.04
 15   2.0228      0.00     0.09       0.00    -0.20
 16   2.0255      0.00     0.12       0.00    -0.13
 17   3.6519      0.00    -0.74       0.00     0.21
 18   3.6519      0.00    -0.75       0.00     0.26
 19   3.6519      0.00    -0.76       0.00     0.21
 20   3.6521      0.00    -0.82       0.00     0.23
 21   3.9616      0.00     0.33       0.00     0.11
 22   3.9618      0.00     0.32       0.00    -0.06
 23   3.9777      0.00     0.24       0.00     0.13
 24   3.9777      0.00     0.35       0.00     0.19
 25   3.9778      0.00     0.58       0.00    -0.04
 26   3.9778      0.00     0.29       0.00    -0.21
 27   4.1225      0.00    -0.36       0.00    -0.49
 28   4.1228      0.00    -0.31       0.00    -0.49
 29   6.9516      0.00     0.19       0.00     0.33
 30  10.0285      0.00    -0.26       0.00    -0.14
 31  10.0286      0.00     0.09       0.00     0.38
 32  10.0312      0.00    -0.16       0.00     0.01
 33  11.7430      0.00     0.02       0.00    -0.06
 34  11.8007      0.00     0.24       0.00    -0.01
 35  11.8143      0.00     0.04       0.00    -0.06
 36  11.8770      0.00    -0.00       0.00    -0.02
 37  11.8771      0.00     0.03       0.00    -0.35
 38  11.9534      0.00     0.03       0.00    -0.07
 39  11.9537      0.00    -0.02       0.00    -0.04
 40  11.9538      0.00    -0.00       0.00    -0.03
 41  11.9565      0.00     0.01       0.00    -0.12
 42  11.9591      0.00     0.03       0.00    -0.02
 43  11.9755      0.00    -0.05       0.00    -0.09
 44  12.0218      0.00     0.00       0.00    -0.01
 45  12.0327      0.00     0.01       0.00     0.01
 46  12.0328      0.00    -0.01       0.00    -0.06
 47  12.1172      0.00     0.11       0.00    -0.07
 48  12.1174      0.00     0.02       0.00    -0.03
 49  12.1258      0.00     0.02       0.00    -0.09
 50  12.1996      0.00     0.05       0.00    -0.10
 51  12.2678      0.00     0.06       0.00    -0.09
 52  12.9502      0.00     0.02       0.00     0.00
 53  12.9503      0.00     0.00       0.00     0.08
 54  12.9529      0.00    -0.00       0.00    -0.00
 55  12.9529      0.00     0.01       0.00     0.05
 56  12.9530      0.00    -0.02       0.00    -0.02
 57  12.9530      0.00     0.00       0.00     0.11
 58  13.0049      0.00     0.03       0.00     0.01
 59  13.0049      0.00     0.00       0.00    -0.02
 60  13.0051      0.00    -0.14       0.00    -0.05
 61  13.0977      0.00     0.03       0.00     0.05
 62  13.1085      0.00     0.09       0.00     0.14
 63  13.1087      0.00     0.01       0.00     0.11
 64  13.2481      0.00     0.08       0.00     0.20
 65  13.2481      0.00    -0.03       0.00     0.04
 66  13.2727      0.00    -0.03       0.00     0.01
 67  13.2727      0.00    -0.02       0.00     0.10
 68  13.3384      0.00    -0.03       0.00     0.00
 69  13.3465      0.00    -0.08       0.00    -0.01
 70  13.9741      0.00     0.00       0.00     0.08
 71  13.9934      0.00     0.06       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.

385458    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        46.305    46.305    46.306
ecceobj         0.172     0.172     0.172
incobj          5.070     5.070     5.070
qmin           37.358    37.379    37.375
qmax           55.040    55.055    55.027
amean          46.009    46.009    46.009
amin           45.602    45.603    45.593
amax           46.481    46.476    46.471
emean           0.172     0.172     0.172
emin            0.158     0.158     0.158
emax            0.185     0.185     0.184
imean           5.676     5.688     5.697
imin            4.903     4.962     4.988
imax            6.383     6.383     6.383
excite_mean     0.198     0.198     0.198
fracstop        1.000     1.000     1.000
cjmean          3.077     3.077     3.077

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       182.4     180.9     180.2
kozaiamp        180.0     180.0     180.0