Orbit Fit and Astrometric record for 99RK215

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: 99RK215   
# Created Mon Dec  6 02:08:37 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     26 observations of     26
# Arc:  19.02y
# First observation: 1999/09/07
#  Last observation: 2018/09/14
# Chi-squared of fit:    78.28 DOF:     46 RMS:  0.31
# Min/Max residuals:    -0.78    0.82
# Exact a, adot, b, bdot, g, gdot:
  1.446549E-05  2.148525E-02 -5.968004E-07 -2.709931E-03  2.380659E-02  2.534001E-03
# Covariance matrix:
  2.0291E-13  2.5144E-14 -1.9082E-15 -4.0511E-15  1.8812E-13  8.1122E-14
  2.5144E-14  8.7760E-14  3.4681E-15 -1.1279E-14  1.3895E-13  2.2139E-13
 -1.9082E-15  3.4681E-15  1.0747E-13 -6.6400E-15  3.7731E-16  8.7802E-15
 -4.0511E-15 -1.1279E-14 -6.6400E-15  2.2735E-15 -1.8003E-14 -2.8718E-14
  1.8812E-13  1.3895E-13  3.7731E-16 -1.8003E-14  4.4784E-13  3.5599E-13
  8.1122E-14  2.2139E-13  8.7802E-15 -2.8718E-14  3.5599E-13  5.6372E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
   -9.062547    8.396761    0.409760   -0.144064   -0.901784  2451429.011913
# Heliocentric elements and errors
Epoch:              2451428.5000  =  1999/09/07
Mean Anomaly:          122.10916 +/-     0.028
Argument of Peri:       97.07335 +/-     0.018
Long of Asc Node:      137.45943 +/-     0.000
Inclination:            11.45015 +/-     0.000
Eccentricity:         0.13287494 +/-    0.0001
Semi-Major Axis:     39.66476316 +/-    0.0032
Time of Perihelion: 2420479.1534 +/-       8.0
Perihelion:          34.39430997 +/-    0.0034
Aphelion:            44.93521635 +/-    0.0041
Period (y)              249.8133 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           42.00704438 +/-    0.0012
Ecliptic Y            5.78779238 +/-    0.0002
Ecliptic Z           -6.61636175 +/-    0.0002
Ecliptic XDOT        -0.00012877 +/-    0.0000
Ecliptic YDOT         0.00248758 +/-    0.0000
Ecliptic ZDOT        -0.00035360 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   42.91690904 +/-    0.0011
Geocenter to KBO     42.00514428 +/-    0.0012
# Hcoef:  7.46

The following table shows the complete astrometric record for 99RK215. 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 (99RK215) followed by the observatory code and reference code for the source of the astrometry.

1999 09  07.51117  00 45 08.61   -04 59 59.6   24.3R 99RK215   568  Ca8547      
1999 09  07.55015  00 45 08.46   -05 00 00.8   23.4R 99RK215   568  Ca8547      
1999 09  07.59142  00 45 08.28   -05 00 01.5   23.1R 99RK215   568  Ca8547      
1999 09  10.59454  00 44 56.64   -05 01 37.4   23.8R 99RK215   568  Ca8547      
1999 09  10.60498  00 44 56.59   -05 01 37.9   23.4R 99RK215   568  Ca8547      
1999 10  10.41986  00 42 48.82   -05 16 47.9   23.6R 99RK215   568  Ca8547      
1999 10  10.46961  00 42 48.62   -05 16 49.3   23.6R 99RK215   568  Ca8547      
1999 10  11.44638  00 42 44.33   -05 17 16.4   23.6R 99RK215   568  Ca8547      
1999 10  11.49807  00 42 44.10   -05 17 17.7   23.5R 99RK215   568  Ca8547      
1999 11  11.38953  00 40 41.23   -05 28 03.0   23.6R 99RK215   568  Ca8547      
1999 11  11.44068  00 40 41.03   -05 28 03.6   24.2R 99RK215   568  Ca8547      
2000 12  27.24300  00 44 08.009  -05 07 25.10  23.2R 99RK215   568  Cl2529      
2000 12  28.25263  00 44 08.289  -05 07 10.60  23.1R 99RK215   568  Cl2529      
2003 11  21.15416  00 59 05.71   -04 07 55.2   24.0R 99RK215   695  Cl2529      
2003 11  21.20316  00 59 05.56   -04 07 55.7         99RK215   695  Cl2529      
2015 11  08.14163  01 54 45.56   +00 01 09.7   23.5R 99RK215   G37  C~1dc0      
2015 11  08.21319  01 54 45.32   +00 01 08.4         99RK215   G37  C~1dc0      
2016 09  10.29392  02 03 07.009  +00 46 52.02  23.0r 99RK215   W84  C~4yC4      
2016 11  28.12449  01 57 52.002  +00 16 08.53  24.3r 99RK215   W84  C~4yC4      
2017 09  18.33799  02 07 09.214  +01 03 15.82  24.8r 99RK215   W84  C~4yC4      
2017 10  27.24057  02 04 31.498  +00 45 38.08  24.4g 99RK215   W84  C~4yC4      
2017 10  29.23867  02 04 22.646  +00 44 50.97  22.8z 99RK215   W84  C~4yC4      
2017 11  16.15429  02 03 05.590  +00 38 54.83  23.7r 99RK215   W84  C~4yC4      
2018 09  09.35165  02 12 02.535  +01 27 26.77  22.5r 99RK215   W84  C~4yC4      
2018 09  09.35304  02 12 02.541  +01 27 26.71  23.2i 99RK215   W84  C~4yC4      
2018 09  14.36371  02 11 48.369  +01 25 11.07  24.4r 99RK215   W84  C~4yC4      

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    -0.24
     2   0.0001      0.00     0.09       0.00    -0.20
     3   0.0002      0.00    -0.20       0.00     0.41
     4   0.0084      0.00     0.02       0.00     0.25
     5   0.0085      0.00    -0.11       0.00     0.08
     6   0.0901      0.00    -0.21       0.00    -0.19
     7   0.0902      0.00     0.13       0.00    -0.22
     8   0.0929      0.00     0.18       0.00    -0.60
     9   0.0931      0.00     0.19       0.00    -0.49
    10   0.1776      0.00     0.15       0.00    -0.33
    11   0.1778      0.00    -0.24       0.00    -0.25
    12   1.3052      0.00    -0.03       0.00     0.50
    13   1.3080      0.00     0.14       0.00     0.39
    14   4.2044      0.00    -0.15       0.00     0.52
    15   4.2045      0.00    -0.12       0.00     0.48
    16  16.1687      0.00    -0.78       0.00     0.72
    17  16.1689      0.00     0.25       0.00     0.82
    18  17.0097      0.00     0.04       0.00    -0.26
    19  17.2255      0.00    -0.05       0.00    -0.15
    20  18.0310      0.00     0.15       0.00    -0.10
    21  18.1375      0.00     0.04       0.00    -0.09
    22  18.1430      0.00     0.07       0.00    -0.33
    23  18.1920      0.00     0.08       0.00    -0.23
    24  19.0057      0.00    -0.08       0.00    -0.12
    25  19.0057      0.00     0.07       0.00    -0.14
    26  19.0194      0.00     0.28       0.00    -0.24

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.

99RK215    quality flag:3

Type:           3:2E      3:2E      3:2E

axisobj        39.642    39.642    39.642
ecceobj         0.133     0.133     0.133
incobj         11.454    11.454    11.454
qmin           32.607    32.606    32.608
qmax           46.748    46.747    46.747
amean          39.457    39.457    39.457
amin           39.064    39.064    39.064
amax           39.896    39.897    39.894
emean           0.153     0.153     0.153
emin            0.131     0.131     0.131
emax            0.172     0.172     0.172
imean           9.645     9.645     9.645
imin            8.833     8.832     8.834
imax           10.537    10.537    10.537
excite_mean     0.227     0.227     0.227
fracstop        1.000     1.000     1.000
cjmean          2.994     2.994     2.994

libcent 0       179.9     179.9     180.0
libamp  0        60.7      60.6      60.8
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       179.4     179.3     179.5
kozaiamp        180.0     180.0     180.0