Orbit Fit and Astrometric record for 98UU43

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: 98UU43    
# Created Sun Oct 21 01:07:24 2018
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   25 observations of   26
# Arc:  10.17y
# First observation: 1998/10/22
#  Last observation: 2008/12/21
# Chi-squared of fit:   236.29 DOF:   44 RMS:  0.54
# Min/Max residuals:    -1.52    1.81
# Exact a, adot, b, bdot, g, gdot:
  1.860996E-05  2.676014E-02 -2.007683E-06 -4.378088E-03  2.718631E-02 -3.290120E-03
# Covariance matrix:
  2.3885E-13 -9.9646E-14 -1.1804E-14  1.6233E-14  1.8041E-13 -3.4454E-13
 -9.9646E-14  1.0143E-13  1.3095E-14 -1.7446E-14 -3.5362E-14  3.6891E-13
 -1.1804E-14  1.3095E-14  1.1360E-13 -1.6443E-14 -5.5765E-15  4.9789E-14
  1.6233E-14 -1.7446E-14 -1.6443E-14  7.3349E-15  8.8896E-15 -6.6532E-14
  1.8041E-13 -3.5362E-14 -5.5765E-15  8.8896E-15  4.4374E-13 -1.9171E-13
 -3.4454E-13  3.6891E-13  4.9789E-14 -6.6532E-14 -1.9171E-13  1.4073E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
    2.386895   37.612680    0.147336    0.040476   -0.976508  2451108.850761
# Heliocentric elements and errors
Epoch:              2451108.5000  =  1998/10/22
Mean Anomaly:          263.33516 +/-     0.044
Argument of Peri:      276.41737 +/-     0.031
Long of Asc Node:      231.33043 +/-     0.000
Inclination:             9.55886 +/-     0.000
Eccentricity:         0.12550393 +/-    0.0001
Semi-Major Axis:     36.67967197 +/-    0.0035
Time of Perihelion: 2472895.7599 +/-      13.0
Perihelion:          32.07622916 +/-    0.0036
Aphelion:            41.28311478 +/-    0.0043
Period (y)              222.1500 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           29.98482578 +/-    0.0007
Ecliptic Y           22.90945784 +/-    0.0005
Ecliptic Z            1.53184991 +/-    0.0000
Ecliptic XDOT        -0.00189274 +/-    0.0000
Ecliptic YDOT         0.00195305 +/-    0.0000
Ecliptic ZDOT        -0.00045436 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   37.76618831 +/-    0.0007
Geocenter to KBO     36.78332344 +/-    0.0009
# Hcoef:  6.79

The following table shows the complete astrometric record for 98UU43. 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 (98UU43) followed by the observatory code and reference code for the source of the astrometry.

1998 10  22.35003  02 17 47.55   +16 18 22.5         98UU43    695  Ca3601      
1998 10  22.48311  02 17 46.87   +16 18 18.5         98UU43    695  Ca3601      
1998 11  18.07069  02 15 27.92   +16 05 19.9   21.5R 98UU43    695  Ch1090      
1998 11  18.14591  02 15 27.54   +16 05 17.6         98UU43    695  Ch1090      
1998 11  18.23096  02 15 27.03   +16 05 15.2         98UU43    695  Ch1090      
1998 12  14.83617  02 13 35.14   +15 53 37.6   22.7R 98UU43    950  Ca3601      
1998 12  14.85345  02 13 35.07   +15 53 37.3         98UU43    950  Ca3601      
1999 11  10.16227  02 22 34.50   +16 25 15.5   22.5R 98UU43    695  Ca7321      
1999 11  10.18814  02 22 34.40   +16 25 14.7         98UU43    695  Ca7321      
1999 11  10.24322  02 22 34.07   +16 25 12.9         98UU43    695  Ca7321      
1999 11  10.31381  02 22 33.61   +16 25 10.7         98UU43    696  Ca7321      
1999 11  10.37010  02 22 33.30   +16 25 09.0   22.7R 98UU43    696  Ca7321      
1999 11  10.41551  02 22 33.04   +16 25 07.8         98UU43    696  Ca7321      
1999 11  11.24109  02 22 28.74   +16 24 43.8         98UU43    696  Ca7321      
1999 11  11.28637  02 22 28.51   +16 24 42.8         98UU43    696  Ca7321      
1999 11  11.33656  02 22 28.17   +16 24 41.3         98UU43    696  Ca7321      
2000 11  23.18416  02 27 52.14   +16 34 03.5   22.3R 98UU43    695  Cc2188      
2000 11  23.36171  02 27 51.25   +16 33 58.8         98UU43    695  Cc2188      
2003 09  28.41448  02 52 24.32   +17 39 25.9   22.4R 98UU43    688  Ci6006      
2003 09  28.47791  02 52 24.04   +17 39 25.9         98UU43    688  Ci6006      
2006 12  24.25190  03 05 25.31   +17 39 56.4   23.1R 98UU43    688  Ct1736      
2006 12  24.32942  03 05 24.84   +17 39 56.4         98UU43    688  Ct1736      
2008 10  24.48081  03 24 27.77   +18 22 25.9   23.5r 98UU43    695  C~0hkJ      
2008 12  21.26140  03 19 18.34   +18 00 34.0   21.3r 98UU43    695  C~0hkJ      
2008 12  21.33897  03 19 18.02   +18 00 32.5   20.6r 98UU43    695  C~0hkJ      
2008 12  22.31325  03 19 13.88   +18 00 14.4   21.8r 98UU43    695  C~0hkJ      

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    -0.58       0.00    -0.31
  2   0.0004      0.00    -0.13       0.00    -0.51
  3   0.0732      0.00    -0.24       0.00     0.10
  4   0.0734      0.00    -0.29       0.00    -0.04
  5   0.0736      0.00    -1.52       0.00     0.02
  6   0.1464      0.00     0.12       0.00    -0.30
  7   0.1465      0.00    -0.05       0.00    -0.22
  8   1.0508      0.00     1.24       0.00     0.41
  9   1.0509      0.00     1.81       0.00     0.36
 10   1.0510      0.00     1.28       0.00     0.16
 11   1.0512      0.00     0.06       0.00     0.02
 12   1.0514      0.00    -0.08       0.00    -0.03
 13   1.0515      0.00    -0.34       0.00     0.11
 14   1.0538      0.00     0.06       0.00     0.18
 15   1.0539      0.00     0.24       0.00     0.50
 16   1.0540      0.00    -0.85       0.00     0.47
 17   2.0885      0.00    -0.05       0.00    -0.18
 18   2.0890      0.00    -0.08       0.00     0.04
 19   4.9338      0.00    -0.18       0.00    -1.22
 20   4.9340      0.00    -0.57       0.00    -0.04
 21   8.1722      0.00    -0.49       0.00     0.08
 22   8.1724      0.00 (  -3.07)      0.00 (   1.53)
 23  10.0072      0.00     0.73       0.00    -0.27
 24  10.1654      0.00    -0.27       0.00     0.23
 25  10.1656      0.00     0.01       0.00     0.20
 26  10.1683      0.00     0.01       0.00     0.19

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.

98UU43    quality flag:3

Type:           4:3E      4:3E      4:3E

axisobj        36.740    36.740    36.740
ecceobj         0.127     0.127     0.127
incobj          9.546     9.546     9.546
qmin           30.378    30.378    30.378
qmax           42.879    42.882    42.869
amean          36.477    36.477    36.477
amin           36.131    36.132    36.129
amax           36.865    36.864    36.865
emean           0.137     0.137     0.137
emin            0.109     0.109     0.109
emax            0.165     0.165     0.165
imean          11.078    11.074    11.081
imin            9.578     9.573     9.586
imax           12.881    12.881    12.880
excite_mean     0.236     0.236     0.237
fracstop        1.000     1.000     1.000
cjmean          2.965     2.965     2.965

libcent 0       179.7     180.3     179.8
libamp  0        67.5      68.7      66.7
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       177.5     177.5     177.6
kozaiamp        180.0     180.0     180.0