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 Sun Oct 22 01:37:04 2017
# Orbit generated from Bernstein formalism
# Fitting   18 observations of   18
# Arc:  14.08y
# First observation: 1999/09/07
#  Last observation: 2013/10/07
Preliminary a, adot, b, bdot, g, gdot:
   0.001237   0.040071   0.000410  -0.003998   0.039062   0.000000
# WARNING -- MRQMIN stopped after  23 iterations
# Chi-squared of fit:    85.07 DOF:   30 RMS:  0.38
# Min/Max residuals:    -1.04    0.78
# Exact a, adot, b, bdot, g, gdot:
  1.626634E-05  3.444973E-02 -7.636843E-07 -3.465935E-03  3.077357E-02 -4.124775E-03
# Covariance matrix:
  2.0257E-13  2.0463E-14  3.5622E-15 -3.2506E-15  2.0073E-13  5.2932E-14
  2.0463E-14  1.3186E-13  8.3691E-15 -1.3331E-14  1.8400E-13  2.3409E-13
  3.5622E-15  8.3691E-15  1.0944E-13 -9.6771E-15  1.4942E-14  1.5125E-14
 -3.2506E-15 -1.3331E-14 -9.6771E-15  3.6970E-15 -1.9371E-14 -2.4093E-14
  2.0073E-13  1.8400E-13  1.4942E-14 -1.9371E-14  5.5221E-13  3.3257E-13
  5.2932E-14  2.3409E-13  1.5125E-14 -2.4093E-14  3.3257E-13  4.2305E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
    9.158941   16.345232    0.531755    0.134760   -0.837214  2451429.035503
# Heliocentric elements and errors
Epoch:              2451420.5000  =  1999/08/30
Mean Anomaly:          311.88480 +/-     0.014
Argument of Peri:      185.69203 +/-     0.018
Long of Asc Node:      253.03835 +/-     0.000
Inclination:            10.53285 +/-     0.000
Eccentricity:         0.16124594 +/-    0.0000
Semi-Major Axis:     36.67671554 +/-    0.0036
Time of Perihelion: 2462263.8597 +/-       2.6
Perihelion:          30.76274416 +/-    0.0035
Aphelion:            42.59068692 +/-    0.0045
Period (y)              222.1232 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           31.75542276 +/-    0.0007
Ecliptic Y            8.75917735 +/-    0.0002
Ecliptic Z            5.17239756 +/-    0.0001
Ecliptic XDOT        -0.00116718 +/-    0.0000
Ecliptic YDOT         0.00286121 +/-    0.0000
Ecliptic ZDOT        -0.00036277 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   33.34492104 +/-    0.0007
Geocenter to KBO     32.49541590 +/-    0.0008
# Hcoef:  7.93

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      

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     0.30       0.00    -0.21
  2   0.0001     -3.68     0.09      -0.49    -1.04
  3   0.0002     -5.97     0.32       0.06    -0.73
  4   0.0110   -304.28     0.04      25.71    -0.48
  5   0.0111   -305.12     0.02      25.96    -0.29
  6   0.0164   -455.71    -0.03      37.00    -0.15
  7   0.0164   -456.32    -0.07      37.04    -0.14
  8   0.0848  -2614.15    -0.08      85.13     0.59
  9   0.0849  -2616.81    -0.35      85.20     0.69
 10   0.1721  -5319.31    -0.50    -122.44     0.09
 11   0.1723  -5322.16    -0.32    -123.15    -0.19
 12   1.3052   -213.09     0.35   -1589.09     0.66
 13   1.3080   -212.63     0.36   -1607.37     0.78
 14   4.2070  22735.16    -0.09   -3186.43     0.39
 15   4.2071  22730.96    -0.00   -3187.16     0.42
 16  14.0831 113166.33     0.04  -11418.45    -0.03
 17  14.0833 113159.84     0.05  -11418.84    -0.29
 18  14.0834 113153.49    -0.10  -11418.69     0.01

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        36.667    36.678    36.656
ecceobj         0.162     0.162     0.161
incobj         10.531    10.531    10.531
qmin           30.129    30.137    30.107
qmax           43.182    43.197    43.227
amean          36.477    36.477    36.477
amin           36.114    36.130    36.109
amax           36.879    36.862    36.894
emean           0.145     0.145     0.146
emin            0.112     0.110     0.117
emax            0.173     0.175     0.174
imean          12.871    12.794    12.851
imin           11.330    11.271    11.492
imax           14.344    14.262    14.413
excite_mean     0.266     0.265     0.266
fracstop        1.000     1.000     1.000
cjmean          2.948     2.949     2.948

libcent 0       180.3     180.7     183.7
libamp  0        81.1      73.1      84.1
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       179.2     179.9     173.9
kozaiamp        180.0     179.9     180.0