Orbit Fit and Astrometric record for 121725

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: 121725    
# Created Tue Oct 17 01:36:29 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   33 observations of   33
# Arc:  16.25y
# First observation: 1999/12/13
#  Last observation: 2016/03/13
# Chi-squared of fit:   154.18 DOF:   60 RMS:  0.38
# Min/Max residuals:    -0.75    1.57
# Exact a, adot, b, bdot, g, gdot:
  1.411974E-05  4.037688E-02  3.486327E-06  4.700781E-03  4.236935E-02  1.443166E-02
# Covariance matrix:
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
#      lat0       lon0       xBary       yBary       zBary        JD0
    1.414024  116.730214    0.568201    0.019513   -0.799192  2451525.901183
# Heliocentric elements and errors
Epoch:              2451526.5000  =  1999/12/14
Mean Anomaly:          123.66344 +/-     0.000
Argument of Peri:      216.22022 +/-     0.000
Long of Asc Node:      103.77438 +/-     0.000
Inclination:             6.76841 +/-     0.000
Eccentricity:         0.46285227 +/-    0.0000
Semi-Major Axis:     17.98286965 +/-    0.0000
Time of Perihelion: 2441958.3995 +/-       0.0
Perihelion:           9.65945763 +/-    0.0000
Aphelion:            26.30628167 +/-    0.0000
Period (y)               76.2600 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -10.45785293 +/-    0.0000
Ecliptic Y           22.04537926 +/-    0.0000
Ecliptic Z            0.58251172 +/-    0.0000
Ecliptic XDOT        -0.00275145 +/-    0.0000
Ecliptic YDOT        -0.00034003 +/-    0.0000
Ecliptic ZDOT         0.00032677 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   24.40694437 +/-    0.0000
Geocenter to KBO     23.60187479 +/-    0.0000
# Hcoef:  8.58

The following table shows the complete astrometric record for 121725. 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 (121725) followed by the observatory code and reference code for the source of the astrometry.

1999 12  13.40044  07 56 13.15   +22 11 51.1   22.1R 121725    696  Ca9036      
1999 12  13.47595  07 56 12.62   +22 11 53.9         121725    696  Ca9036      
1999 12  15.36374  07 55 59.00   +22 12 40.0         121725    696  Ca9036      
1999 12  15.42851  07 55 58.48   +22 12 40.7         121725    696  Ca9036      
1999 12  15.46972  07 55 58.16   +22 12 42.2   22.3R 121725    696  Ca9036      
2000 01  10.48582  07 52 18.63   +22 24 17.6   21.8R 121725    568  Ca9036      
2000 01  10.49595  07 52 18.54   +22 24 17.5   21.9R 121725    568  Ca9036      
2000 01  30.12862  07 49 19.07   +22 32 53.8         121725    705  Cb0065      
2000 01  30.15347  07 49 18.86   +22 32 54.4         121725    705  Cb0065      
2000 01  30.18755  07 49 18.57   +22 32 55.6         121725    705  Cb0065      
2000 11  26.50420  08 07 38.25   +21 53 47.2   21.9R 121725    695  Cc2321      
2000 11  27.49291  08 07 33.74   +21 54 06.7   22.1R 121725    695  Cc2321      
2000 11  27.53080  08 07 33.57   +21 54 07.4   22.3R 121725    695  Cc2321      
2000 11  29.46529  08 07 24.31   +21 54 46.8   22.3R 121725    695  Cc2321      
2000 11  29.52530  08 07 24.01   +21 54 48.0   22.2R 121725    695  Cc2321      
2001 01  25.20490  08 00 01.08   +22 20 14.5   22.2R 121725    695  Cc6606      
2001 01  25.29288  08 00 00.28   +22 20 16.9         121725    695  Cc6606      
2002 11  05.59370  08 27 09.45   +21 19 00.1   22.5R 121725    568  Cl8265      
2002 11  06.60524  08 27 09.22   +21 19 08.6         121725    568  Cl8265      
2002 11  07.60277  08 27 08.82   +21 19 17.9         121725    568  Cl8265      
2002 12  01.53139  08 26 10.01   +21 25 37.3   22.5R 121725    568  Cg7552      
2002 12  01.55872  08 26 09.89   +21 25 37.9         121725    568  Cg7552      
2002 12  02.57336  08 26 05.36   +21 26 00.3         121725    568  Cg7552      
2004 03  17.267158 08 22 34.29   +21 56 49.2   22.9V 121725    645  C~1Ssa      
2004 03  17.267988 08 22 34.28   +21 56 49.2   22.3V 121725    645  C~1Ssa      
2004 03  17.270476 08 22 34.37   +21 56 49.3   23.3V 121725    645  C~1Ssa      
2006 02  25.20816  08 42 44.74   +21 14 50.0   22.8R 121725    688  Cq5899      
2006 02  25.31383  08 42 43.97   +21 14 52.9         121725    688  Cq5899      
2015 04  15.15795  09 54 14.683  +17 44 28.25  22.9R 121725    695              
2015 04  15.22729  09 54 14.436  +17 44 29.02        121725    695              
2015 04  15.30425  09 54 14.151  +17 44 29.81        121725    695              
2016 03  13.15930  10 05 32.20   +16 59 52.0   22.3R 121725    G37  C~1ppJ      
2016 03  13.19957  10 05 31.90   +16 59 53.7         121725    G37  C~1ppJ      

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    -0.31       0.00     1.47
  2   0.0002      0.00     0.48       0.00     0.56
  3   0.0054      0.00     0.68       0.00     0.17
  4   0.0056      0.00     0.15       0.00    -0.75
  5   0.0057      0.00    -0.03       0.00    -0.26
  6   0.0769      0.00     0.32       0.00     0.37
  7   0.0769      0.00     0.38       0.00    -0.00
  8   0.1307      0.00    -0.61       0.00    -0.03
  9   0.1307      0.00    -0.41       0.00    -0.06
 10   0.1308      0.00    -0.15       0.00     0.29
 11   0.9558      0.00    -0.01       0.00     0.40
 12   0.9585      0.00    -0.09       0.00     0.33
 13   0.9586      0.00     0.07       0.00     0.28
 14   0.9639      0.00    -0.05       0.00     0.21
 15   0.9641      0.00     0.02       0.00     0.17
 16   1.1192      0.00     0.07       0.00    -0.04
 17   1.1195      0.00     0.12       0.00    -0.07
 18   2.8972      0.00     0.14       0.00    -0.37
 19   2.8999      0.00    -0.09       0.00    -0.42
 20   2.9027      0.00    -0.36       0.00    -0.14
 21   2.9682      0.00    -0.08       0.00    -0.40
 22   2.9683      0.00    -0.02       0.00    -0.40
 23   2.9710      0.00    -0.16       0.00    -0.49
 24   4.2597      0.00     0.14       0.00     0.00
 25   4.2597      0.00     0.05       0.00    -0.01
 26   4.2597      0.00     1.57       0.00     0.06
 27   6.2034      0.00    -0.50       0.00     0.20
 28   6.2037      0.00    -0.21       0.00     0.33
 29  15.3368      0.00    -0.07       0.00     0.11
 30  15.3370      0.00     0.05       0.00     0.20
 31  15.3372      0.00    -0.01       0.00     0.26
 32  16.2485      0.00     0.16       0.00    -0.12
 33  16.2486      0.00     0.08       0.00     0.15

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.

121725    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        17.984    17.984    17.984
ecceobj         0.463     0.463     0.463
incobj          6.768     6.768     6.768
qmin            9.548     8.959     9.558
qmax           30.490    26.306    27.754
amean          18.821    15.856    17.607
amin           17.087    13.625    16.795
amax           20.425    17.984    18.669
emean           0.466     0.406     0.454
emin            0.439     0.342     0.430
emax            0.493     0.463     0.487
imean           5.895     3.416     4.675
imin            4.039     1.880     4.079
imax            7.225     5.194     5.194
excite_mean     0.477     0.411     0.462
fracstop        0.001     0.001     0.000
cjmean          2.994     3.235     3.069

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       289.4     185.5     247.2
kozaiamp         63.5     158.4      32.9