Orbit Fit and Astrometric record for 13FJ28

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: 13FJ28    
# Created Fri Jul 20 01:38:03 2018
# Orbit generated from Bernstein formalism
# Fitting   31 observations of   31
# Arc:   2.00y
# First observation: 2013/03/16
#  Last observation: 2015/03/16
Preliminary a, adot, b, bdot, g, gdot:
  -0.000168   0.038898  -0.000122   0.014959   0.035522   0.000000
# Chi-squared of fit:    86.79 DOF:   56 RMS:  0.30
# Min/Max residuals:    -0.85    0.63
# Exact a, adot, b, bdot, g, gdot:
  1.669219E-05  3.776031E-02  8.782226E-06  1.450051E-02  3.545047E-02 -1.871490E-02
# Covariance matrix:
  1.8032E-13 -2.6254E-13  1.0270E-14 -4.6610E-14  4.2022E-14 -1.9329E-12
 -2.6254E-13  7.9814E-13 -5.4914E-14  2.3845E-13  8.9740E-15  9.8248E-12
  1.0270E-14 -5.4914E-14  1.5351E-13 -1.5132E-13 -1.4258E-14 -8.9051E-13
 -4.6610E-14  2.3845E-13 -1.5132E-13  2.5693E-13  4.0147E-14  3.8035E-12
  4.2022E-14  8.9740E-15 -1.4258E-14  4.0147E-14  4.7463E-13  1.5198E-12
 -1.9329E-12  9.8248E-12 -8.9051E-13  3.8035E-12  1.5198E-12  1.5632E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -6.060680  169.904011   -0.099258   -0.104494   -0.984946  2456367.598908
# Heliocentric elements and errors
Epoch:              2456360.5000  =  2013/03/09
Mean Anomaly:          315.67051 +/-     0.024
Argument of Peri:       78.37134 +/-     0.009
Long of Asc Node:      184.90831 +/-     0.000
Inclination:            21.85605 +/-     0.001
Eccentricity:         0.44150690 +/-    0.0003
Semi-Major Axis:     35.06826643 +/-    0.0111
Time of Perihelion: 2465700.7835 +/-       2.4
Perihelion:          19.58538472 +/-    0.0121
Aphelion:            50.55114813 +/-    0.0191
Period (y)              207.6728 +/-      0.10
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -28.60817244 +/-    0.0005
Ecliptic Y            4.99520130 +/-    0.0001
Ecliptic Z           -2.97807161 +/-    0.0001
Ecliptic XDOT         0.00078114 +/-    0.0000
Ecliptic YDOT        -0.00310171 +/-    0.0000
Ecliptic ZDOT         0.00126636 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   29.19329507 +/-    0.0005
Geocenter to KBO     28.20837143 +/-    0.0005
# Hcoef:  7.41

The following table shows the complete astrometric record for 13FJ28. 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 (13FJ28) followed by the observatory code and reference code for the source of the astrometry.

2013 03  16.09813  11 13 22.948  -01 34 38.51  22.2r 13FJ28    807  C~1LLf      
2013 03  16.09813  11 13 22.94   -01 34 39.1   22.6r 13FJ28    W84  C~2J9e      
2013 03  16.16724  11 13 22.537  -01 34 35.45        13FJ28    807  C~1LLf      
2013 03  16.16725  11 13 22.50   -01 34 35.7         13FJ28    W84  C~2J9e      
2013 03  16.23751  11 13 22.094  -01 34 31.87        13FJ28    807  C~1LLf      
2013 03  16.23751  11 13 22.06   -01 34 32.2         13FJ28    W84  C~2J9e      
2013 05  07.97839  11 09 17.402  -00 54 34.87  22.1r 13FJ28    807  C~1LLf      
2013 05  07.99901  11 09 17.345  -00 54 34.33        13FJ28    807  C~1LLf      
2013 05  09.00539  11 09 15.142  -00 53 59.67        13FJ28    807  C~1LLf      
2014 03  02.09273  11 24 19.87   -01 51 15.7   21.1g 13FJ28    W84  C~2TH2      
2014 03  02.18507  11 24 19.29   -01 51 11.5   21.4g 13FJ28    W84  C~2TH2      
2014 03  02.27557  11 24 18.71   -01 51 07.5   20.0g 13FJ28    W84  C~2TH2      
2014 03  02.37144  11 24 18.12   -01 51 03.0   21.7g 13FJ28    W84  C~2TH2      
2014 03  02.39340  11 24 17.98   -01 51 01.6   21.9g 13FJ28    W84  C~2TH2      
2014 03  03.08253  11 24 13.71   -01 50 29.4   22.0g 13FJ28    W84  C~2TH2      
2014 03  03.17428  11 24 13.13   -01 50 25.1   23.2g 13FJ28    W84  C~2TH2      
2014 03  03.27459  11 24 12.48   -01 50 20.4   21.2g 13FJ28    W84  C~2TH2      
2014 03  03.37789  11 24 11.82   -01 50 15.3   22.0g 13FJ28    W84  C~2TH2      
2014 03  04.08372  11 24 07.45   -01 49 42.0   21.9g 13FJ28    W84  C~2TH2      
2014 03  04.17731  11 24 06.85   -01 49 37.5   21.3g 13FJ28    W84  C~2TH2      
2014 03  04.26791  11 24 06.27   -01 49 33.3   22.1g 13FJ28    W84  C~2TH2      
2014 03  04.37188  11 24 05.60   -01 49 28.2   22.5g 13FJ28    W84  C~2TH2      
2014 03  04.39386  11 24 05.48   -01 49 26.9   23.0g 13FJ28    W84  C~2TH2      
2014 03  05.08138  11 24 01.20   -01 48 54.4   22.7g 13FJ28    W84  C~2TH2      
2014 03  05.19133  11 24 00.50   -01 48 49.1   21.7g 13FJ28    W84  C~2TH2      
2014 03  05.28463  11 23 59.88   -01 48 44.6   21.3g 13FJ28    W84  C~2TH2      
2014 03  05.37916  11 23 59.30   -01 48 40.1   22.4g 13FJ28    W84  C~2TH2      
2014 04  30.98902  11 18 53.665  -01 03 22.07  22.1r 13FJ28    304  C~1LLf      
2014 05  01.97679  11 18 50.396  -01 02 43.16        13FJ28    304  C~1LLf      
2015 03  16.18834  11 32 42.21   -01 45 09.4   22.3R 13FJ28    G37  C~1N7m      
2015 03  16.25628  11 32 41.74   -01 45 05.7         13FJ28    G37  C~1N7m      

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     0.03       0.00    -0.48
  2   0.0000     -0.12    -0.09       0.59     0.11
  3   0.0002     -6.99     0.38       0.99    -0.08
  4   0.0002     -7.40    -0.03       0.54    -0.53
  5   0.0004    -14.84    -0.01       1.18    -0.50
  6   0.0004    -14.50     0.33       1.68    -0.00
  7   0.1448  -4330.56     0.05     768.70    -0.12
  8   0.1448  -4331.56     0.00     768.86    -0.33
  9   0.1476  -4375.57    -0.01     787.79    -0.15
 10   0.9610   9461.94    -0.14    2937.45     0.20
 11   0.9612   9452.28    -0.05    2937.92     0.12
 12   0.9615   9442.69    -0.05    2938.20    -0.13
 13   0.9617   9432.77     0.17    2938.89    -0.02
 14   0.9618   9430.28     0.00    2939.36     0.31
 15   0.9637   9358.62     0.03    2943.99     0.16
 16   0.9639   9348.92     0.05    2944.55     0.15
 17   0.9642   9338.09    -0.10    2945.07     0.06
 18   0.9645   9326.96    -0.26    2945.90     0.24
 19   0.9664   9253.49     0.01    2950.95     0.27
 20   0.9667   9243.43    -0.08    2951.58     0.30
 21   0.9669   9233.76    -0.07    2952.05     0.19
 22   0.9672   9222.50    -0.25    2952.82     0.29
 23   0.9673   9220.33    -0.09    2953.31     0.63
 24   0.9692   9148.42     0.07    2958.16     0.43
 25   0.9695   9136.67     0.07    2958.94     0.48
 26   0.9697   9126.33    -0.27    2959.45     0.39
 27   0.9700   9116.55     0.05    2960.19     0.49
 28   1.1250   3829.67    -0.10    3669.65    -0.36
 29   1.1277   3769.30    -0.30    3686.28    -0.49
 30   1.9989  16285.32     0.57    6224.85    -0.85
 31   1.9991  16277.34     0.08    6225.51    -0.81

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.

13FJ28    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        34.955    34.980    34.930
ecceobj         0.441     0.442     0.440
incobj         21.896    21.896    21.896
qmin           19.364    19.252    19.488
qmax           50.862    50.884    51.346
amean          34.865    34.100    34.979
amin           34.392    33.384    34.255
amax           35.355    35.312    35.573
emean           0.433     0.424     0.437
emin            0.421     0.413     0.430
emax            0.445     0.446     0.444
imean          22.196    22.506    21.921
imin           21.514    21.515    21.521
imax           22.767    22.943    22.340
excite_mean     0.574     0.571     0.575
fracstop        0.002     0.016     0.002
cjmean          2.669     2.671     2.669

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        81.8      89.7      80.9
kozaiamp          3.0       9.7       1.7