Orbit Fit and Astrometric record for 99RW215

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: 99RW215   
# Created Fri Dec  3 02:08:40 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     21 observations of     21
# Arc:  21.35y
# First observation: 1999/09/07
#  Last observation: 2021/01/11
# Chi-squared of fit:    98.42 DOF:     36 RMS:  0.38
# Min/Max residuals:    -0.98    0.87
# Exact a, adot, b, bdot, g, gdot:
  1.648275E-05  3.444967E-02 -5.440387E-07 -3.466063E-03  3.077376E-02 -4.124732E-03
# Covariance matrix:
  1.8178E-13 -2.5503E-14 -3.3052E-15  3.3647E-15  1.1827E-13 -3.1662E-14
 -2.5503E-14  1.1140E-14  1.5005E-15 -1.3259E-15 -1.6105E-14  1.2891E-14
 -3.3052E-15  1.5005E-15  1.0180E-13 -5.7494E-15 -3.2432E-15  1.9189E-15
  3.3647E-15 -1.3259E-15 -5.7494E-15  8.2271E-16  3.7866E-15 -1.7709E-15
  1.1827E-13 -1.6105E-14 -3.2432E-15  3.7866E-15  2.0644E-13 -3.4635E-14
 -3.1662E-14  1.2891E-14  1.9189E-15 -1.7709E-15 -3.4635E-14  1.7039E-14
#      lat0       lon0       xBary       yBary       zBary        JD0
    9.158941   16.345232    0.531756    0.134760   -0.837214  2451429.035503
# Heliocentric elements and errors
Epoch:              2451428.5000  =  1999/09/07
Mean Anomaly:          311.91342 +/-     0.002
Argument of Peri:      185.69967 +/-     0.003
Long of Asc Node:      253.03737 +/-     0.000
Inclination:            10.53297 +/-     0.000
Eccentricity:         0.16123180 +/-    0.0001
Semi-Major Axis:     36.67553161 +/-    0.0576
Time of Perihelion: 2462264.8849 +/-     165.7
Perihelion:          30.76226945 +/-    0.0484
Aphelion:            42.58879377 +/-    0.0670
Period (y)              222.1124 +/-      0.52
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           31.75522835 +/-    0.0006
Ecliptic Y            8.75912766 +/-    0.0002
Ecliptic Z            5.17237246 +/-    0.0001
Ecliptic XDOT        -0.00116716 +/-    0.0000
Ecliptic YDOT         0.00286119 +/-    0.0000
Ecliptic ZDOT        -0.00036278 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   33.34479676 +/-    0.0006
Geocenter to KBO     32.49531804 +/-    0.0007
# Hcoef:  7.95

The following table shows the complete astrometric record for 99RW215. 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 (99RW215) followed by the observatory code and reference code for the source of the astrometry.

1999 09  07.53476  00 45 44.02   +14 51 56.9   23.2R 99RW215   568  Ca9937      
1999 09  07.58118  00 45 43.80   +14 51 55.0   22.8R 99RW215   568  Ca9937      
1999 09  07.61487  00 45 43.64   +14 51 54.6   23.0R 99RW215   568  Ca9937      
1999 09  11.56880  00 45 24.04   +14 50 20.3   22.9R 99RW215   568  Ca9937      
1999 09  11.57924  00 45 23.98   +14 50 20.2   22.9R 99RW215   568  Ca9937      
1999 09  13.50731  00 45 14.14   +14 49 30.8   22.7R 99RW215   568  Ca9937      
1999 09  13.51439  00 45 14.10   +14 49 30.6   23.1R 99RW215   568  Ca9937      
1999 10  08.52087  00 42 56.26   +14 35 59.0   22.6R 99RW215   568  Ca9937      
1999 10  08.54696  00 42 56.09   +14 35 58.0   22.8R 99RW215   568  Ca9937      
1999 11  09.40896  00 40 11.29   +14 14 49.4   22.9R 99RW215   568  Ca9937      
1999 11  09.44946  00 40 11.13   +14 14 47.6   23.0R 99RW215   568  Ca9937      
2000 12  27.26274  00 46 13.744  +14 26 12.74  22.7R 99RW215   568  Cl2529      
2000 12  28.26969  00 46 14.269  +14 25 56.12  22.7R 99RW215   568  Cl2529      
2003 11  22.12531  01 11 17.12   +16 26 56.5   22.4R 99RW215   695  Cl2529      
2003 11  22.18533  01 11 16.87   +16 26 54.3         99RW215   695  Cl2529      
2013 10  07.38637  02 44 19.41   +21 24 27.7   22.7R 99RW215   695  C~0zdB      
2013 10  07.44887  02 44 19.07   +21 24 26.1         99RW215   695  C~0zdB      
2013 10  07.50848  02 44 18.73   +21 24 25.0         99RW215   695  C~0zdB      
2021 01  11.156980 03 43 06.412  +22 12 41.47  23.0G 99RW215   G37  C~4Tvb      
2021 01  11.216200 03 43 06.200  +22 12 40.27        99RW215   G37  C~4Tvb      
2021 01  11.258830 03 43 06.047  +22 12 39.73        99RW215   G37  C~4Tvb      

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     0.34       0.00    -0.14
     2   0.0001      0.00     0.48       0.00    -0.98
     3   0.0002      0.00     0.58       0.00    -0.61
     4   0.0110      0.00     0.21       0.00    -0.48
     5   0.0111      0.00     0.12       0.00    -0.32
     6   0.0164      0.00     0.01       0.00    -0.20
     7   0.0164      0.00    -0.03       0.00    -0.22
     8   0.0848      0.00    -0.32       0.00     0.46
     9   0.0849      0.00    -0.62       0.00     0.44
    10   0.1721      0.00    -0.50       0.00    -0.15
    11   0.1723      0.00    -0.21       0.00    -0.34
    12   1.3052      0.00     0.11       0.00     0.75
    13   1.3080      0.00     0.06       0.00     0.87
    14   4.2070      0.00    -0.17       0.00     0.41
    15   4.2071      0.00    -0.11       0.00     0.47
    16  14.0831      0.00    -0.04       0.00     0.28
    17  14.0833      0.00     0.02       0.00     0.06
    18  14.0834      0.00    -0.16       0.00     0.29
    19  21.3460      0.00     0.05       0.00    -0.30
    20  21.3462      0.00     0.03       0.00    -0.35
    21  21.3463      0.00    -0.01       0.00    -0.07

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.

99RW215    quality flag:3

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

axisobj        36.666    36.666    36.666
ecceobj         0.162     0.162     0.162
incobj         10.531    10.531    10.531
qmin           30.093    30.120    30.084
qmax           43.213    43.212    43.235
amean          36.477    36.477    36.477
amin           36.096    36.089    36.123
amax           36.901    36.905    36.878
emean           0.146     0.147     0.145
emin            0.114     0.117     0.113
emax            0.172     0.173     0.174
imean          12.520    12.323    12.882
imin           10.905    10.523    11.436
imax           14.329    14.276    14.360
excite_mean     0.262     0.260     0.266
fracstop        1.000     1.000     1.000
cjmean          2.951     2.952     2.948

libcent 0       180.1     179.3     179.7
libamp  0        91.4      95.0      76.1
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       174.4     180.5     179.7
kozaiamp        179.9     180.0     179.9