Orbit Fit and Astrometric record for 99RX215

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: 99RX215   
# Created Thu Oct 18 01:07:38 2018
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   17 observations of   17
# Arc:  15.12y
# First observation: 1999/09/08
#  Last observation: 2014/10/22
# Chi-squared of fit:    22.17 DOF:   28 RMS:  0.20
# Min/Max residuals:    -0.28    0.44
# Exact a, adot, b, bdot, g, gdot:
  1.551349E-05  2.553075E-02  4.538638E-07 -2.895002E-04  2.474075E-02  1.731539E-03
# Covariance matrix:
  2.5347E-13 -9.1211E-14 -1.3041E-15  8.6062E-16  4.4941E-13 -2.5703E-13
 -9.1211E-14  5.8332E-14  8.8168E-16 -6.1217E-16 -2.4717E-13  1.7552E-13
 -1.3041E-15  8.8168E-16  1.3950E-13 -1.4209E-14 -5.1297E-15  2.9412E-15
  8.6062E-16 -6.1217E-16 -1.4209E-14  3.7943E-15  2.7031E-15 -1.9634E-15
  4.4941E-13 -2.4717E-13 -5.1297E-15  2.7031E-15  3.0417E-12 -9.7161E-13
 -2.5703E-13  1.7552E-13  2.9412E-15 -1.9634E-15 -9.7161E-13  5.8097E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.629514  -37.646232   -0.385223   -0.010387   -0.923507  2451429.796453
# Heliocentric elements and errors
Epoch:              2451430.5000  =  1999/09/09
Mean Anomaly:           26.56717 +/-     0.035
Argument of Peri:      188.36840 +/-     0.044
Long of Asc Node:       99.24123 +/-     0.007
Inclination:             0.89127 +/-     0.000
Eccentricity:         0.14369562 +/-    0.0002
Semi-Major Axis:     47.17331874 +/-    0.0168
Time of Perihelion: 2442697.0492 +/-      12.4
Perihelion:          40.39471969 +/-    0.0179
Aphelion:            53.95191779 +/-    0.0220
Period (y)              324.0058 +/-      0.17
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           32.97646076 +/-    0.0022
Ecliptic Y          -24.94258272 +/-    0.0017
Ecliptic Z           -0.44403698 +/-    0.0000
Ecliptic XDOT         0.00187297 +/-    0.0000
Ecliptic YDOT         0.00212855 +/-    0.0000
Ecliptic ZDOT        -0.00003408 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.34939568 +/-    0.0021
Geocenter to KBO     40.41913349 +/-    0.0028
# Hcoef:  7.44

The following table shows the complete astrometric record for 99RX215. 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 (99RX215) followed by the observatory code and reference code for the source of the astrometry.

1999 09  08.29571  21 39 41.48   -14 39 23.0   23.7R 99RX215   568  Ca9937      
1999 09  08.34809  21 39 41.22   -14 39 24.2   23.3R 99RX215   568  Ca9937      
1999 09  08.40068  21 39 41.01   -14 39 25.4   23.4R 99RX215   568  Ca9937      
1999 09  10.30523  21 39 32.98   -14 40 04.9   23.6R 99RX215   568  Ca9937      
1999 09  10.31684  21 39 32.95   -14 40 05.3   23.6R 99RX215   568  Ca9937      
1999 10  08.31941  21 37 57.64   -14 47 46.6   23.4R 99RX215   568  Ca9937      
1999 10  10.23744  21 37 53.09   -14 48 07.9   23.6R 99RX215   568  Ca9937      
1999 10  10.28640  21 37 52.97   -14 48 08.4   23.2R 99RX215   568  Ca9937      
2003 08  24.19583  22 03 24.68   -12 39 41.4   22.1R 99RX215   807  Ci3203      
2003 08  25.20668  22 03 20.02   -12 40 07.0         99RX215   807  Ci3203      
2003 08  25.31108  22 03 19.53   -12 40 09.6         99RX215   807  Ci3203      
2004 09  11.07609  22 07 32.58   -12 18 02.5   22.9R 99RX215   304  Cl4067      
2004 09  11.07917  22 07 32.56   -12 18 02.7         99RX215   304  Cl4067      
2004 09  11.11898  22 07 32.38   -12 18 03.5         99RX215   304  Cl4067      
2004 09  11.12205  22 07 32.36   -12 18 03.7         99RX215   304  Cl4067      
2014 10  22.14534  22 58 01.27   -07 29 33.6   23.5R 99RX215   G37  C~1Bx9      
2014 10  22.25273  22 58 01.00   -07 29 35.3         99RX215   G37  C~1Bx9      

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     0.25       0.00    -0.05
  2   0.0001      0.00    -0.23       0.00    -0.15
  3   0.0003      0.00     0.05       0.00    -0.24
  4   0.0055      0.00     0.09       0.00    -0.06
  5   0.0055      0.00     0.39       0.00    -0.22
  6   0.0822      0.00     0.09       0.00    -0.16
  7   0.0875      0.00     0.05       0.00    -0.11
  8   0.0876      0.00    -0.00       0.00    -0.08
  9   3.9587      0.00    -0.06       0.00     0.38
 10   3.9614      0.00    -0.01       0.00     0.14
 11   3.9617      0.00    -0.03       0.00     0.15
 12   5.0097      0.00     0.12       0.00     0.34
 13   5.0097      0.00     0.02       0.00     0.21
 14   5.0098      0.00    -0.07       0.00     0.35
 15   5.0098      0.00    -0.17       0.00     0.22
 16  15.1207      0.00    -0.15       0.00    -0.28
 17  15.1210      0.00     0.44       0.00    -0.21

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.

99RX215    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        47.108    47.108    47.108
ecceobj         0.143     0.143     0.143
incobj          0.891     0.891     0.891
qmin           39.744    39.744    39.746
qmax           54.567    54.584    54.568
amean          46.989    46.990    46.990
amin           46.580    46.582    46.581
amax           47.454    47.453    47.471
emean           0.137     0.137     0.137
emin            0.124     0.123     0.124
emax            0.150     0.151     0.151
imean           0.937     0.937     0.937
imin            0.454     0.454     0.454
imax            1.313     1.312     1.312
excite_mean     0.138     0.138     0.138
fracstop        1.000     1.000     1.000
cjmean          3.115     3.115     3.115

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       176.6     176.6     176.9
kozaiamp        180.0     180.0     180.0