Orbit Fit and Astrometric record for 17CX33

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: 17CX33    
# Created Thu Jul 19 01:38:25 2018
# Orbit generated from Bernstein formalism
# Fitting   34 observations of   35
# Arc:   1.03y
# First observation: 2017/02/01
#  Last observation: 2018/02/12
Preliminary a, adot, b, bdot, g, gdot:
  -0.000941   0.094719   0.000771  -0.267961   0.099788   0.000000
# Chi-squared of fit:    36.99 DOF:   62 RMS:  0.18
# Min/Max residuals:    -0.69    0.41
# Exact a, adot, b, bdot, g, gdot:
  1.399936E-05  9.087585E-02 -4.001746E-05 -2.625772E-01  1.049900E-01 -1.399882E-02
# Covariance matrix:
  1.1135E-13 -1.9593E-14  1.9215E-14 -3.3259E-13  1.9239E-13  1.2079E-12
 -1.9593E-14  1.7157E-12  1.9052E-13 -4.2431E-12  6.0692E-13  1.5506E-11
  1.9215E-14  1.9052E-13  9.7390E-14 -6.7264E-13  1.2758E-13  2.1690E-12
 -3.3259E-13 -4.2431E-12 -6.7264E-13  1.3072E-11 -2.4358E-12 -4.6881E-11
  1.9239E-13  6.0692E-13  1.2758E-13 -2.4358E-12  9.6445E-13  8.8694E-12
  1.2079E-12  1.5506E-11  2.1690E-12 -4.6881E-11  8.8694E-12  1.7121E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   20.149252  129.408121   -0.048079    0.339514   -0.924788  2457785.919991
# Heliocentric elements and errors
Epoch:              2457780.5000  =  2017/01/27
Mean Anomaly:          359.90047 +/-     0.000
Argument of Peri:      163.07819 +/-     0.006
Long of Asc Node:      315.88268 +/-     0.000
Inclination:            71.99532 +/-     0.000
Eccentricity:         0.85892602 +/-    0.0000
Semi-Major Axis:     74.07546881 +/-    0.0207
Time of Perihelion: 2457844.8789 +/-       0.1
Perihelion:          10.45012113 +/-    0.0041
Aphelion:           137.70081649 +/-    0.0387
Period (y)              637.5582 +/-      0.27
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           -6.34264785 +/-    0.0001
Ecliptic Y            7.63532889 +/-    0.0001
Ecliptic Z            3.28057049 +/-    0.0000
Ecliptic XDOT        -0.00310790 +/-    0.0000
Ecliptic YDOT         0.00004648 +/-    0.0000
Ecliptic ZDOT        -0.00655404 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   10.45416528 +/-    0.0001
Geocenter to KBO      9.52471999 +/-    0.0001
# Hcoef: 10.89

The following table shows the complete astrometric record for 17CX33. 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 (17CX33) followed by the observatory code and reference code for the source of the astrometry.

2017 02  01.41919  09 13 44.536  +37 11 53.09  21.1w 17CX33    F51  C~28Fb      
2017 02  01.43072  09 13 44.197  +37 11 52.57  21.2w 17CX33    F51  C~28Fb      
2017 02  01.44209  09 13 43.838  +37 11 52.20  21.2w 17CX33    F51  C~28Fb      
2017 02  01.45345  09 13 43.485  +37 11 51.60  20.9w 17CX33    F51  C~28Fb      
2017 02  02.391851 09 13 15.371  +37 11 09.95  21.1G 17CX33    568  C~28Fb      
2017 02  02.392836 09 13 15.342  +37 11 09.90  21.2G 17CX33    568  C~28Fb      
2017 02  02.393819 09 13 15.310  +37 11 09.86  21.0G 17CX33    568  C~28Fb      
2017 02  07.46820  09 10 43.20   +37 06 42.3   20.2R 17CX33    291  C~28Fb      
2017 02  07.48070  09 10 42.83   +37 06 41.6   19.9R 17CX33    291  C~28Fb      
2017 02  21.23845  09 04 03.03   +36 48 19.8   21.0V 17CX33    I52  C~28Fb      
2017 02  21.25030  09 04 02.72   +36 48 18.3   21.2V 17CX33    I52  C~28Fb      
2017 02  21.25342  09 04 02.60   +36 48 19.3   20.2V 17CX33    G96  C~28Fb      
2017 02  21.25930  09 04 02.49   +36 48 17.4   21.2V 17CX33    G96  C~28Fb      
2017 02  21.26519  09 04 02.32   +36 48 17.0   20.4V 17CX33    G96  C~28Fb      
2017 02  21.27107  09 04 02.16   +36 48 16.7   20.7V 17CX33    G96  C~28Fb      
2017 02  21.27523  09 04 02.02   +36 48 16.1   21.3V 17CX33    I52  C~28Fb      
2017 02  22.21319  09 03 35.98   +36 46 40.5   20.9V 17CX33    I52  C~28Fb      
2017 02  22.22906  09 03 35.47   +36 46 38.4   21.4V 17CX33    I52  C~28Fb      
2017 02  22.24272  09 03 35.11   +36 46 37.2   20.9V 17CX33    I52  C~28Fb      
2017 02  22.25526  09 03 34.79   +36 46 36.3   21.9V 17CX33    I52  C~28Fb      
2017 02  23.377631 09 03 03.915  +36 44 38.46  21.4G 17CX33    568  C~28Fb      
2017 02  23.379169 09 03 03.872  +36 44 38.27  21.4G 17CX33    568  C~28Fb      
2017 02  23.380708 09 03 03.831  +36 44 38.09  21.4G 17CX33    568  C~28Fb      
2017 05  02.15252  08 47 21.75   +33 17 16.8   21.3R 17CX33    G37  C~2Faf      
2017 05  02.18393  08 47 21.78   +33 17 09.5         17CX33    G37  C~2Faf      
2017 12  20.50066  09 30 16.360  +21 43 45.19  21.3R 17CX33    G37  C~2Y57      
2017 12  20.52259  09 30 16.010  +21 43 44.28        17CX33    G37  C~2Y57      
2018 01  14.55601  09 21 57.283  +21 28 23.01  21.3w 17CX33    F51  C~2Y57      
2018 01  14.56838  09 21 56.990  +21 28 22.47  21.1w 17CX33    F51  C~2Y57      
2018 01  14.58075  09 21 56.692  +21 28 22.05  21.2w 17CX33    F51  C~2Y57      
2018 01  14.59308  09 21 56.402  +21 28 21.68  21.2w 17CX33    F51  C~2Y57      
2018 02  12.34797  09 09 58.321  +21 09 25.42  21.2w 17CX33    F51  C~2ZO5      
2018 02  12.36121  09 09 57.981  +21 09 24.78  21.2w 17CX33    F51  C~2ZO5      
2018 02  12.37449  09 09 57.647  +21 09 24.15  21.2w 17CX33    F51  C~2ZO5      
2018 02  12.38796  09 09 57.300  +21 09 23.48  21.3w 17CX33    F51  C~2ZO5      

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     0.10
  2   0.0000     -3.68     0.08      -1.78     0.11
  3   0.0001     -7.63    -0.10      -3.49     0.17
  4   0.0001    -11.44    -0.14      -5.39     0.04
  5   0.0027   -316.94     0.06    -151.19    -0.00
  6   0.0027   -317.26     0.07    -151.35    -0.00
  7   0.0027   -317.61     0.04    -151.51    -0.01
  8   0.0166  -1961.50     0.01    -974.26     0.23
  9   0.0166  -1965.49     0.05    -976.29     0.33
 10   0.0543  -6205.67    -0.26   -3471.19    -0.04
 11   0.0543  -6208.79     0.12   -3473.72    -0.25
 12   0.0543  -6210.47 (  -0.63)  -3473.19 (   0.89)
 13   0.0543  -6211.17     0.41   -3475.39    -0.17
 14   0.0543  -6213.01     0.31   -3476.37     0.01
 15   0.0544  -6214.76     0.30   -3477.22     0.31
 16   0.0544  -6216.20     0.10   -3478.29     0.05
 17   0.0569  -6487.76    -0.03   -3661.33    -0.01
 18   0.0570  -6493.02    -0.64   -3665.13    -0.69
 19   0.0570  -6496.81    -0.43   -3667.55    -0.41
 20   0.0570  -6500.23    -0.18   -3669.53     0.08
 21   0.0601  -6821.37     0.04   -3890.51    -0.01
 22   0.0601  -6821.81     0.05   -3890.85    -0.04
 23   0.0601  -6822.23     0.07   -3891.16    -0.05
 24   0.2457 -14639.25     0.13  -19092.06     0.14
 25   0.2458 -14637.03     0.01  -19099.10     0.17
 26   0.8818  31648.51     0.02  -49397.34    -0.02
 27   0.8819  31644.09     0.03  -49400.00     0.07
 28   0.9504  25174.81     0.03  -52767.81     0.03
 29   0.9504  25170.99     0.08  -52769.76    -0.09
 30   0.9505  25167.06     0.01  -52771.61    -0.11
 31   0.9505  25163.22     0.02  -52773.38    -0.04
 32   1.0292  15674.89    -0.04  -57280.51     0.01
 33   1.0293  15670.40    -0.08  -57282.71     0.02
 34   1.0293  15665.99    -0.01  -57284.87     0.07
 35   1.0293  15661.41    -0.05  -57287.13     0.05

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.

17CX33    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        74.792    74.984    74.602
ecceobj         0.860     0.860     0.859
incobj         71.967    71.967    71.967
qmin           10.089    10.200    10.175
qmax          146.949   166.609   151.285
amean          71.800    82.397    73.787
amin           65.858    72.701    67.404
amax           78.519    88.518    80.833
emean           0.856     0.873     0.859
emin            0.842     0.857     0.846
emax            0.872     0.883     0.872
imean          73.398    73.079    73.347
imin           72.390    72.090    72.557
imax           74.248    74.103    74.193
excite_mean     1.285     1.295     1.287
fracstop        0.025     0.021     0.021
cjmean          0.865     0.823     0.856

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       159.1     160.6     160.0
kozaiamp          4.2       2.9       3.3