Orbit Fit and Astrometric record for 99RG215

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: 99RG215   
# Created Mon Dec 18 02:37:00 2017
# Orbit generated from Bernstein formalism
# Fitting   22 observations of   22
# Arc:  18.05y
# First observation: 1999/09/07
#  Last observation: 2017/09/23
Preliminary a, adot, b, bdot, g, gdot:
  -0.001260   0.023126  -0.000004   0.000070   0.015610   0.000000
# Chi-squared of fit:    61.83 DOF:   38 RMS:  0.30
# Min/Max residuals:    -0.61    0.58
# Exact a, adot, b, bdot, g, gdot:
  1.529214E-05  2.154905E-02  1.910589E-06  6.471561E-05  2.271082E-02 -1.449090E-03
# Covariance matrix:
  1.4235E-13 -8.2260E-14  2.2290E-16 -2.4034E-16  2.3964E-13 -1.9119E-13
 -8.2260E-14  1.0720E-13 -3.1357E-16  3.3624E-16 -3.8186E-13  2.6707E-13
  2.2290E-16 -3.1357E-16  8.6703E-14 -6.7867E-15  1.1965E-15 -7.9817E-16
 -2.4034E-16  3.3624E-16 -6.7867E-15  2.1370E-15 -1.2512E-15  8.5528E-16
  2.3964E-13 -3.8186E-13  1.1965E-15 -1.2512E-15  2.2255E-12 -9.8674E-13
 -1.9119E-13  2.6707E-13 -7.9817E-16  8.5528E-16 -9.8674E-13  6.7920E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.174470  -22.852066   -0.121761    0.002793   -0.993534  2451428.914683
# Heliocentric elements and errors
Epoch:              2451420.5000  =  1999/08/30
Mean Anomaly:          302.69601 +/-     0.134
Argument of Peri:      109.66697 +/-     0.162
Long of Asc Node:      292.64533 +/-     0.022
Inclination:             0.24287 +/-     0.000
Eccentricity:         0.07623623 +/-    0.0001
Semi-Major Axis:     46.75443577 +/-    0.0138
Time of Perihelion: 2470007.7447 +/-      42.7
Perihelion:          43.19005391 +/-    0.0133
Aphelion:            50.31881764 +/-    0.0154
Period (y)              319.6999 +/-      0.14
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           41.54645186 +/-    0.0027
Ecliptic Y          -17.37097972 +/-    0.0011
Ecliptic Z            0.13418131 +/-    0.0000
Ecliptic XDOT         0.00084378 +/-    0.0000
Ecliptic YDOT         0.00247007 +/-    0.0000
Ecliptic ZDOT         0.00000733 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   45.03195092 +/-    0.0025
Geocenter to KBO     44.03187933 +/-    0.0029
# Hcoef:  7.20

The following table shows the complete astrometric record for 99RG215. 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 (99RG215) followed by the observatory code and reference code for the source of the astrometry.

1999 09  07.41394  22 35 10.86   -08 43 28.2   23.6R 99RG215   568  Ca8546      
1999 09  07.44753  22 35 10.70   -08 43 29.1   23.9R 99RG215   568  Ca8546      
1999 09  07.48067  22 35 10.58   -08 43 29.8   24.3R 99RG215   568  Ca8546      
1999 09  09.38498  22 35 02.62   -08 44 17.0   23.3R 99RG215   568  Ca8546      
1999 09  09.39657  22 35 02.56   -08 44 17.3   23.1R 99RG215   568  Ca8547      
1999 10  09.35104  22 33 10.59   -08 55 20.7   23.4R 99RG215   568  Ca8547      
1999 10  09.42045  22 33 10.39   -08 55 21.9   23.6R 99RG215   568  Ca8547      
1999 10  11.35049  22 33 04.52   -08 55 57.0   23.8R 99RG215   568  Ca8547      
2000 08  25.19228  22 40 42.16   -08 10 19.8   23.1R 99RG215   807  Cc0856      
2000 08  25.25424  22 40 41.90   -08 10 21.7         99RG215   807  Cc0856      
2000 08  29.15295  22 40 25.43   -08 12 00.3         99RG215   809  Cb7614      
2000 08  29.25209  22 40 25.00   -08 12 02.6         99RG215   809  Cb7614      
2000 08  30.13214  22 40 21.29   -08 12 24.4         99RG215   809  Cb7614      
2000 08  30.21740  22 40 20.93   -08 12 26.5         99RG215   809  Cb7614      
2000 08  30.30047  22 40 20.55   -08 12 28.9   22.8R 99RG215   809  Cb7614      
2000 08  30.34795  22 40 20.37   -08 12 29.9         99RG215   809  Cb7614      
2000 08  30.39124  22 40 20.16   -08 12 31.2         99RG215   809  Cb7614      
2005 08  08.12376  23 04 59.39   -05 40 22.6   22.1R 99RG215   807  Co3301      
2005 08  08.23993  23 04 58.97   -05 40 25.1         99RG215   807  Co3301      
2005 08  09.12890  23 04 55.80   -05 40 44.9         99RG215   807  Co3301      
2017 09  23.32804  23 58 06.83   +00 02 40.8   23.2R 99RG215   G37  C~2LPe      
2017 09  23.41031  23 58 06.50   +00 02 39.0         99RG215   G37  C~2LPe      

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    -0.06       0.00    -0.38
  2   0.0001     -2.54    -0.31       0.04    -0.36
  3   0.0002     -4.45     0.03       0.05    -0.36
  4   0.0054   -131.55     0.05      -0.02    -0.40
  5   0.0054   -132.49    -0.10       0.03    -0.35
  6   0.0874  -1919.87    -0.07      -1.87    -0.36
  7   0.0876  -1923.06     0.23      -1.89    -0.40
  8   0.0929  -2016.87    -0.04      -2.36    -0.61
  9   0.9659   5303.64     0.38      14.21     0.45
 10   0.9660   5299.34     0.32      13.89     0.10
 11   0.9767   5035.52    -0.20      13.92    -0.03
 12   0.9770   5028.73    -0.17      14.17     0.18
 13   0.9794   4969.46     0.09      14.55     0.57
 14   0.9796   4963.71     0.21      14.60     0.58
 15   0.9798   4957.58    -0.22      14.49     0.43
 16   0.9800   4954.73     0.18      14.56     0.48
 17   0.9801   4951.35    -0.25      14.52     0.42
 18   5.9184  28979.47    -0.11      81.56     0.09
 19   5.9188  28972.59    -0.07      81.68     0.15
 20   5.9212  28920.28     0.10      81.67     0.06
 21  18.0449  85172.21    -0.31     262.07    -0.27
 22  18.0452  85166.05     0.31     262.40     0.03

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.

99RG215    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        46.702    46.744    46.661
ecceobj         0.076     0.076     0.076
incobj          0.244     0.244     0.244
qmin           42.284    42.318    42.254
qmax           50.954    51.034    50.873
amean          46.480    46.521    46.440
amin           46.105    46.135    46.065
amax           46.881    46.934    46.847
emean           0.075     0.075     0.074
emin            0.062     0.062     0.061
emax            0.087     0.087     0.087
imean           1.862     1.861     1.863
imin            1.467     1.471     1.465
imax            2.220     2.214     2.222
excite_mean     0.081     0.082     0.081
fracstop        1.000     1.000     1.000
cjmean          3.124     3.125     3.124

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       188.6     189.3     188.2
kozaiamp        180.0     180.0     180.0