Orbit Fit and Astrometric record for 85627

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: 85627     
# Created Thu Apr 15 01:07:07 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     54 observations of     54
# Arc:  20.20y
# First observation: 1998/04/28
#  Last observation: 2018/07/12
# Chi-squared of fit:    38.00 DOF:    102 RMS:  0.15
# Min/Max residuals:    -0.38    0.36
# Exact a, adot, b, bdot, g, gdot:
  1.542504E-05  2.315928E-02  9.023575E-07 -6.089754E-04  2.388847E-02 -1.823434E-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
    0.165807 -129.901257    0.218439    0.002622   -0.987991  2450931.999271
# Heliocentric elements and errors
Epoch:              2450932.5000  =  1998/04/29
Mean Anomaly:          290.76454 +/-     0.000
Argument of Peri:      253.07990 +/-     0.000
Long of Asc Node:       55.94292 +/-     0.000
Inclination:             1.51877 +/-     0.000
Eccentricity:         0.08980321 +/-    0.0000
Semi-Major Axis:     43.92109723 +/-    0.0000
Time of Perihelion: 2471379.7204 +/-       0.0
Perihelion:          39.97684154 +/-    0.0000
Aphelion:            47.86535292 +/-    0.0000
Period (y)              291.0838 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -27.64503364 +/-    0.0000
Ecliptic Y          -32.73448965 +/-    0.0000
Ecliptic Z            0.12120615 +/-    0.0000
Ecliptic XDOT         0.00217211 +/-    0.0000
Ecliptic YDOT        -0.00153373 +/-    0.0000
Ecliptic ZDOT        -0.00007049 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   42.84640168 +/-    0.0000
Geocenter to KBO     41.86127381 +/-    0.0000
# Hcoef:  7.24

The following table shows the complete astrometric record for 85627. 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 (85627) followed by the observatory code and reference code for the source of the astrometry.

1998 04  28.49854  15 10 48.35   -17 36 27.9   23.3R 85627     568  Ca4825      
1998 04  28.53791  15 10 48.16   -17 36 27.1   23.3R 85627     568  Ca4825      
1998 04  28.57687  15 10 47.99   -17 36 26.3   23.3R 85627     568  Ca4825      
1998 04  30.51423  15 10 38.93   -17 35 50.9   23.3R 85627     568  Ca4825      
1998 04  30.54746  15 10 38.76   -17 35 50.1   23.3R 85627     568  Ca4825      
1998 04  30.55509  15 10 38.73   -17 35 50.1   23.3R 85627     568  Ca4825      
1998 05  24.34801  15 08 45.99   -17 28 27.7   23.3R 85627     568  Ca4825      
1998 05  24.35970  15 08 45.93   -17 28 27.8   23.3R 85627     568  Ca4825      
1998 06  29.40581  15 06 26.20   -17 19 20.3   23.3R 85627     568  Ca4825      
1998 06  29.46823  15 06 26.03   -17 19 19.6   23.3R 85627     568  Ca4825      
1999 04  08.54442  15 17 35.44   -18 04 59.1   23.2R 85627     568  Ca4825      
1999 04  08.56718  15 17 35.35   -18 04 59.1   23.2R 85627     568  Ca4825      
1999 05  06.51082  15 15 31.89   -17 57 12.4   23.3R 85627     568  Ca4825      
1999 05  06.54164  15 15 31.74   -17 57 11.9   23.3R 85627     568  Ca4825      
2000 05  07.48272  15 20 46.09   -18 19 20.8   23.4R 85627     568  Cb5091      
2000 05  07.53292  15 20 45.84   -18 19 20.0   23.6R 85627     568  Cb5091      
2004 05  27.01245  15 41 08.11   -19 39 54.2   22.5R 85627     304  Ck8630      
2004 05  27.02591  15 41 08.04   -19 39 54.1         85627     304  Ck8630      
2004 05  27.03037  15 41 08.03   -19 39 54.0         85627     304  Ck8630      
2004 05  27.03494  15 41 08.00   -19 39 54.0         85627     304  Ck8630      
2004 05  27.03940  15 41 07.99   -19 39 53.9         85627     304  Ck8630      
2004 05  27.04385  15 41 07.96   -19 39 53.9         85627     304  Ck8630      
2004 05  27.04845  15 41 07.92   -19 39 53.8         85627     304  Ck8630      
2004 05  27.05737  15 41 07.89   -19 39 53.6         85627     304  Ck8630      
2004 05  27.06206  15 41 07.86   -19 39 53.5         85627     304  Ck8630      
2004 05  27.06652  15 41 07.84   -19 39 53.5         85627     304  Ck8630      
2004 05  27.07097  15 41 07.82   -19 39 53.4         85627     304  Ck8630      
2004 05  27.07554  15 41 07.80   -19 39 53.4         85627     304  Ck8630      
2004 05  27.08001  15 41 07.78   -19 39 53.2         85627     304  Ck8630      
2004 05  27.08447  15 41 07.74   -19 39 53.2         85627     304  Ck8630      
2004 05  27.08900  15 41 07.73   -19 39 53.3         85627     304  Ck8630      
2004 05  27.09346  15 41 07.71   -19 39 53.0         85627     304  Ck8630      
2004 05  27.09792  15 41 07.69   -19 39 53.0         85627     304  Ck8630      
2005 06  06.237779 15 45 56.73   -19 57 42.5         85627     645  C~1ctm      
2005 06  06.238608 15 45 56.73   -19 57 42.5         85627     645  C~1ctm      
2005 06  06.241096 15 45 56.71   -19 57 42.5         85627     645  C~1ctm      
2007 05  13.30864  15 59 18.88   -20 42 21.1   22.9R 85627     250  S~06GU      
2007 05  13.31559  15 59 18.85   -20 42 21.0         85627     250  S~06GU      
2007 05  13.37253  15 59 18.57   -20 42 20.2         85627     250  S~06GU      
2007 05  13.37948  15 59 18.53   -20 42 20.1         85627     250  S~06GU      
2011 05  24.469207 16 21 38.048  -21 49 18.39  23.1G 85627     F51  C~41zW      
2011 05  30.407133 16 21 07.760  -21 48 09.81  22.1G 85627     F51  C~41zW      
2013 06  07.430667 16 32 14.698  -22 17 14.42  22.4G 85627     F51  C~41zW      
2014 05  21.479323 16 39 42.067  -22 34 11.91  23.5G 85627     F51  C~41zW      
2014 05  28.436090 16 39 06.526  -22 33 07.07  23.2G 85627     F51  C~41zW      
2014 06  28.371167 16 36 32.141  -22 28 13.24  23.3G 85627     F51  C~41zW      
2014 07  25.345031 16 34 51.488  -22 24 50.98  22.4G 85627     F51  C~41zW      
2015 07  09.388737 16 41 45.810  -22 40 26.53  23.2G 85627     F51  C~41zW      
2015 08  06.314806 16 40 21.149  -22 37 43.14  23.7G 85627     F51  C~41zW      
2016 06  08.445114 16 50 13.322  -22 57 24.77  23.0G 85627     F51  C~41zW      
2018 07  12.340263 16 59 47.817  -23 16 33.49  23.7G 85627     F51  C~41zW      
2018 07  12.350735 16 59 47.771  -23 16 33.31  23.5G 85627     F51  C~41zW      
2018 07  12.361230 16 59 47.722  -23 16 32.99  23.6G 85627     F51  C~41zW      
2018 07  12.371725 16 59 47.663  -23 16 32.84  23.2G 85627     F51  C~41zW      

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    -0.25
     2   0.0001      0.00    -0.15       0.00    -0.18
     3   0.0002      0.00     0.07       0.00    -0.09
     4   0.0055      0.00     0.03       0.00    -0.11
     5   0.0056      0.00    -0.14       0.00     0.08
     6   0.0056      0.00    -0.04       0.00    -0.06
     7   0.0708      0.00    -0.16       0.00     0.36
     8   0.0708      0.00    -0.24       0.00     0.04
     9   0.1695      0.00     0.00       0.00    -0.14
    10   0.1697      0.00     0.15       0.00    -0.14
    11   0.9447      0.00    -0.13       0.00     0.09
    12   0.9447      0.00    -0.14       0.00    -0.24
    13   1.0213      0.00     0.08       0.00    -0.18
    14   1.0213      0.00     0.07       0.00    -0.24
    15   2.0260      0.00     0.11       0.00    -0.23
    16   2.0261      0.00     0.05       0.00    -0.33
    17   6.0794      0.00     0.04       0.00     0.19
    18   6.0795      0.00    -0.02       0.00     0.09
    19   6.0795      0.00     0.16       0.00     0.12
    20   6.0795      0.00     0.05       0.00     0.05
    21   6.0795      0.00     0.23       0.00     0.08
    22   6.0795      0.00     0.11       0.00     0.01
    23   6.0795      0.00    -0.15       0.00     0.04
    24   6.0796      0.00     0.06       0.00     0.11
    25   6.0796      0.00    -0.05       0.00     0.13
    26   6.0796      0.00    -0.02       0.00     0.07
    27   6.0796      0.00     0.01       0.00     0.10
    28   6.0796      0.00     0.05       0.00     0.03
    29   6.0796      0.00     0.08       0.00     0.16
    30   6.0796      0.00    -0.19       0.00     0.09
    31   6.0796      0.00    -0.00       0.00    -0.08
    32   6.0797      0.00     0.03       0.00     0.15
    33   6.0797      0.00     0.06       0.00     0.08
    34   7.1067      0.00     0.20       0.00     0.26
    35   7.1067      0.00     0.26       0.00     0.25
    36   7.1068      0.00     0.13       0.00     0.21
    37   9.0399      0.00     0.06       0.00    -0.11
    38   9.0399      0.00     0.12       0.00    -0.11
    39   9.0400      0.00     0.12       0.00    -0.08
    40   9.0401      0.00     0.03       0.00    -0.08
    41  13.0704      0.00    -0.16       0.00     0.17
    42  13.0867      0.00    -0.12       0.00     0.02
    43  15.1100      0.00    -0.15       0.00     0.16
    44  16.0629      0.00    -0.05       0.00     0.07
    45  16.0820      0.00    -0.02       0.00    -0.04
    46  16.1667      0.00    -0.33       0.00    -0.09
    47  16.2405      0.00    -0.06       0.00    -0.38
    48  17.1961      0.00    -0.06       0.00    -0.23
    49  17.2726      0.00    -0.01       0.00     0.19
    50  18.1135      0.00     0.16       0.00     0.08
    51  20.2049      0.00     0.16       0.00    -0.37
    52  20.2049      0.00     0.14       0.00    -0.25
    53  20.2050      0.00     0.07       0.00     0.00
    54  20.2050      0.00    -0.14       0.00     0.09

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.

85627    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.738    43.737    43.738
ecceobj         0.087     0.087     0.087
incobj          1.518     1.518     1.518
qmin           39.516    39.513    39.516
qmax           48.878    48.870    48.879
amean          44.044    44.045    44.045
amin           43.695    43.689    43.698
amax           44.418    44.431    44.432
emean           0.083     0.083     0.083
emin            0.066     0.066     0.066
emax            0.100     0.100     0.100
imean           1.009     1.009     1.009
imin            0.114     0.115     0.115
imax            1.617     1.617     1.617
excite_mean     0.085     0.085     0.085
fracstop        1.000     1.000     1.000
cjmean          3.093     3.093     3.093

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       198.3     198.2     198.3
kozaiamp        179.9     180.0     179.9