Orbit Fit and Astrometric record for 01UP18

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: 01UP18    
# Created Sun Dec  5 02:09:11 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     20 observations of     24
# Arc:   7.04y
# First observation: 2001/10/19
#  Last observation: 2008/11/01
# Chi-squared of fit:    98.51 DOF:     34 RMS:  0.39
# Min/Max residuals:    -1.16    1.24
# Exact a, adot, b, bdot, g, gdot:
  1.305922E-05  1.749840E-02  1.012196E-06  1.923898E-05  2.029566E-02  9.592682E-04
# Covariance matrix:
  1.7749E-13 -4.9282E-14  1.3216E-17 -5.3473E-17  1.6298E-14 -1.3608E-13
 -4.9282E-14  2.7735E-14  8.8712E-17  3.5037E-17 -3.4280E-14  9.1995E-14
  1.3216E-17  8.8712E-17  1.1391E-13 -1.0644E-14 -1.1176E-15  3.9962E-16
 -5.3473E-17  3.5037E-17 -1.0644E-14  2.1515E-15 -4.3174E-17  1.2569E-16
  1.6298E-14 -3.4280E-14 -1.1176E-15 -4.3174E-17  2.8664E-13 -1.4270E-13
 -1.3608E-13  9.1995E-14  3.9962E-16  1.2569E-16 -1.4270E-13  3.3238E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.193101   18.540082   -0.125436   -0.020584   -0.983444  2452201.886133
# Heliocentric elements and errors
Epoch:              2452202.5000  =  2001/10/20
Mean Anomaly:          128.93405 +/-     0.071
Argument of Peri:      138.19340 +/-     0.061
Long of Asc Node:      105.46675 +/-     0.007
Inclination:             1.17145 +/-     0.000
Eccentricity:         0.07242170 +/-    0.0000
Semi-Major Axis:     47.93545694 +/-    0.0051
Time of Perihelion: 2408786.5940 +/-      24.8
Perihelion:          44.46388954 +/-    0.0052
Aphelion:            51.40702434 +/-    0.0059
Period (y)              331.8895 +/-      0.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           47.59905677 +/-    0.0012
Ecliptic Y           16.10129059 +/-    0.0004
Ecliptic Z           -1.02588002 +/-    0.0000
Ecliptic XDOT        -0.00063653 +/-    0.0000
Ecliptic YDOT         0.00227973 +/-    0.0000
Ecliptic ZDOT         0.00000011 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   50.25903457 +/-    0.0012
Geocenter to KBO     49.27161403 +/-    0.0013
# Hcoef:  5.81

The following table shows the complete astrometric record for 01UP18. 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 (01UP18) followed by the observatory code and reference code for the source of the astrometry.

2001 10  19.38539  01 10 14.23   +06 09 45.1   22.3R 01UP18    695  Ce1017      
2001 10  19.42801  01 10 14.07   +06 09 44.1         01UP18    695  Ce1017      
2001 10  20.37986  01 10 10.43   +06 09 21.1         01UP18    695  Ce1017      
2001 11  03.06736  01 09 19.81   +06 04 19.2   22.6  01UP18    304  Ce6643      
2001 11  03.11380  01 09 19.65   +06 04 18.0         01UP18    304  Ce6643      
2002 11  07.14797  01 12 49.94   +06 25 49.0   22.5R 01UP18    695  Cg7919      
2002 11  07.25554  01 12 49.58   +06 25 46.8         01UP18    695  Cg7919      
2002 11  28.20372  01 11 46.79   +06 19 45.0   22.4R 01UP18    695  Cg7919      
2002 11  28.25993  01 11 46.63   +06 19 44.1   22.4R 01UP18    695  Cg7919      
2003 07  08.57223  01 21 20.02   +07 18 41.6   23.0R 01UP18    568  Ci2666      
2003 07  09.57786  01 21 21.05   +07 18 46.3         01UP18    568  Ci2666      
2005 09  29.38833  01 26 24.39   +07 47 36.8   22.9R 01UP18    688  Co3675      
2005 09  29.47074  01 26 24.15   +07 47 34.5         01UP18    688  Co3675      
2006 08  31.95230  01 31 37.94   +08 18 55.0   22.4R 01UP18    250  S~06AR      
2006 08  31.95670  01 31 37.92   +08 18 54.9         01UP18    250  S~06AR      
2006 08  31.96110  01 31 37.91   +08 18 54.9         01UP18    250  S~06AR      
2006 08  31.96549  01 31 37.90   +08 18 54.8         01UP18    250  S~06AR      
2008 11  01.384615 01 35 26.27   +08 41 03.9         01UP18    645  C~1Cph      
2008 11  01.385444 01 35 26.27   +08 41 03.9         01UP18    645  C~1Cph      
2008 11  01.387932 01 35 26.26   +08 41 03.8         01UP18    645  C~1Cph      
2013 10  07.36994  01 55 44.85   +10 36 58.4   22.8R 01UP18    695  C~0zdE      
2013 10  07.49260  01 55 44.40   +10 36 55.7         01UP18    695  C~0zdE      
2019 11  27.167630 02 14 57.201  +12 21 26.36  23.1G 01UP18    G37  C~3cVA      
2019 11  27.230190 02 14 56.969  +12 21 25.45        01UP18    G37  C~3cVA      

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     0.19       0.00    -0.15
     2   0.0001      0.00     0.27       0.00    -0.15
     3   0.0027      0.00     0.25       0.00    -1.15
     4   0.0402      0.00    -0.20       0.00    -0.00
     5   0.0403      0.00    -0.09       0.00    -0.23
     6   1.0507      0.00    -0.01       0.00     0.04
     7   1.0510      0.00     0.25       0.00     0.02
     8   1.1083      0.00     0.15       0.00     0.07
     9   1.1085      0.00    -0.12       0.00    -0.05
    10   1.7171      0.00    -0.03       0.00     0.08
    11   1.7199      0.00     0.17       0.00     0.20
    12   3.9453      0.00    -1.16       0.00     1.24
    13   3.9455      0.00    -0.13       0.00     0.78
    14   4.8667      0.00 (   1.49)      0.00 (   3.29)
    15   4.8667      0.00 (   1.35)      0.00 (   3.26)
    16   4.8667      0.00 (   1.37)      0.00 (   3.33)
    17   4.8667      0.00 (   1.38)      0.00 (   3.30)
    18   7.0363      0.00     0.15       0.00    -0.21
    19   7.0363      0.00     0.20       0.00    -0.20
    20   7.0363      0.00     0.19       0.00    -0.24
    21  11.9671      0.00    -0.27       0.00     0.33
    22  11.9674      0.00    -0.03       0.00     0.20
    23  18.1048      0.00     0.23       0.00    -0.36
    24  18.1050      0.00     0.02       0.00    -0.22

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.

01UP18    quality flag:3

Type:           2:1E      2:1E      2:1E

axisobj        48.150    48.150    48.150
ecceobj         0.071     0.071     0.071
incobj          1.171     1.171     1.171
qmin           41.527    41.301    42.178
qmax           54.586    54.599    53.987
amean          47.797    47.798    47.798
amin           47.309    47.320    47.348
amax           48.318    48.284    48.287
emean           0.094     0.087     0.082
emin            0.048     0.043     0.048
emax            0.131     0.133     0.119
imean           0.368     0.574     0.327
imin            0.084     0.084     0.084
imax            0.534     0.964     0.501
excite_mean     0.094     0.088     0.082
fracstop        1.000     1.000     1.000
cjmean          3.138     3.139     3.141

libcent 0       181.3     181.2     179.1
libamp  0       133.3     128.9     131.5
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       180.0     169.1     182.3
kozaiamp        180.0     180.0     180.0