Orbit Fit and Astrometric record for 612156

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: 612156    
# Created Wed Dec 25 02:07:38 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     47 observations of     47
# Arc:  17.16y
# First observation: 2000/03/29
#  Last observation: 2017/05/28
# Chi-squared of fit:    71.05 DOF:     88 RMS:  0.22
# Min/Max residuals:    -0.67    0.81
# Exact a, adot, b, bdot, g, gdot:
  1.463976E-05  2.040570E-02  2.393069E-06  1.580153E-03  2.231676E-02 -2.017145E-03
# 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
    0.561053 -174.689167   -0.066912    0.009617   -1.003426  2451632.888143
# Heliocentric elements and errors
Epoch:              2451632.5000  =  2000/03/29
Mean Anomaly:          263.14688 +/-     0.000
Argument of Peri:      114.72461 +/-     0.000
Long of Asc Node:      178.35683 +/-     0.000
Inclination:             4.47349 +/-     0.000
Eccentricity:         0.09702153 +/-    0.0000
Semi-Major Axis:     44.87956203 +/-    0.0000
Time of Perihelion: 2481177.3941 +/-       0.0
Perihelion:          40.52527844 +/-    0.0000
Aphelion:            49.23384562 +/-    0.0000
Period (y)              300.6638 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -45.60116188 +/-    0.0000
Ecliptic Y           -4.30404603 +/-    0.0000
Ecliptic Z            0.43889544 +/-    0.0000
Ecliptic XDOT         0.00047387 +/-    0.0000
Ecliptic YDOT        -0.00246283 +/-    0.0000
Ecliptic ZDOT         0.00019154 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   45.80599355 +/-    0.0000
Geocenter to KBO     44.80948235 +/-    0.0000
# Hcoef:  7.54

The following table shows the complete astrometric record for 612156. 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 (612156) followed by the observatory code and reference code for the source of the astrometry.

2000 03  29.38740  12 20 23.34   -01 35 41.5   24.0R 612156    568  Cb2555      
2000 03  29.42985  12 20 23.16   -01 35 40.1   23.9R 612156    568  Cb2555      
2000 03  29.47449  12 20 22.97   -01 35 38.8   23.4R 612156    568  Cb2555      
2000 03  30.36007  12 20 19.34   -01 35 14.7   24.2R 612156    568  Cb2555      
2000 03  30.38158  12 20 19.26   -01 35 14.0   23.8R 612156    568  Cb2555      
2001 02  23.27950  12 27 03.49   -02 13 32.8   24.0R 612156    309  Cc6643      
2001 02  23.35965  12 27 03.21   -02 13 30.9         612156    309  Cc6643      
2001 02  24.34956  12 26 59.81   -02 13 07.5   24.0R 612156    309  Cc6643      
2001 03  24.34932  12 25 11.60   -02 00 54.0   23.9R 612156    695  Cc7845      
2001 03  24.43551  12 25 11.26   -02 00 51.8         612156    695  Cc7845      
2002 02  12.25482  12 32 04.57   -02 40 14.3         612156    304  Ce8748      
2002 02  12.31238  12 32 04.41   -02 40 13.3   23.0R 612156    304  Ce8748      
2013 03  12.35916  13 21 04.23   -06 40 48.7   23.8R 612156    695  C~0uco      
2013 03  12.43349  13 21 03.94   -06 40 47.5         612156    695  C~0uco      
2013 03  13.36292  13 21 00.63   -06 40 24.7         612156    695  C~0uco      
2013 05  14.20820  13 16 51.85   -06 14 32.4   24.0R 612156    G37  C~0snV      
2013 05  14.27350  13 16 51.56   -06 14 32.0         612156    G37  C~0snV      
2015 02  17.58446  13 31 40.193  -07 33 27.08  24.0r 612156    568  C~2ncJ      
2015 02  17.62541  13 31 40.106  -07 33 26.44  24.1r 612156    568  C~2ncJ      
2015 02  20.61856  13 31 33.763  -07 32 39.53  24.1r 612156    568  C~2ncJ      
2015 03  18.56291  13 30 14.620  -07 23 42.84  23.9r 612156    568  C~2ncJ      
2015 03  18.60407  13 30 14.466  -07 23 41.85  23.9r 612156    568  C~2ncJ      
2015 03  20.56704  13 30 07.045  -07 22 53.95  24.0r 612156    568  C~2ncJ      
2015 04  11.50134  13 28 36.761  -07 13 26.14  23.9r 612156    568  C~2ncJ      
2015 04  13.36562  13 28 28.769  -07 12 36.86  23.9r 612156    568  C~2ncJ      
2015 04  13.40656  13 28 28.595  -07 12 35.75  23.9r 612156    568  C~2ncJ      
2015 04  13.50913  13 28 28.142  -07 12 33.12  24.0r 612156    568  C~2ncJ      
2015 04  19.40635  13 28 02.819  -07 09 58.66  23.8r 612156    568  C~2ncJ      
2015 05  18.32905  13 26 08.489  -06 58 42.21  23.7r 612156    568  C~2ncJ      
2015 06  20.27906  13 24 48.077  -06 51 25.01  24.1r 612156    568  C~2ncJ      
2015 06  20.31989  13 24 48.020  -06 51 24.78  24.0r 612156    568  C~2ncJ      
2015 06  22.32371  13 24 45.590  -06 51 13.75  23.9r 612156    568  C~2ncJ      
2015 07  14.27603  13 24 40.076  -06 51 20.88  24.2r 612156    568  C~2ncJ      
2015 07  20.26893  13 24 45.437  -06 52 04.00  24.2r 612156    568  C~2ncJ      
2016 02  04.56733  13 36 45.228  -07 58 18.21  24.3w 612156    568  C~2ncJ      
2016 02  10.60492  13 36 38.681  -07 57 18.25  23.6w 612156    568  C~2ncJ      
2016 02  11.57713  13 36 37.328  -07 57 06.71  24.4w 612156    568  C~2ncJ      
2016 03  11.55250  13 35 25.498  -07 48 37.92  24.4w 612156    568  C~2ncJ      
2016 03  12.47618  13 35 22.359  -07 48 17.27  24.1w 612156    568  C~2ncJ      
2016 04  03.43722  13 33 57.003  -07 39 14.62  24.2w 612156    568  C~2ncJ      
2016 04  09.41701  13 33 31.557  -07 36 37.93  23.7w 612156    568  C~2ncJ      
2017 02  24.64707  13 40 59.477  -08 15 57.74        612156    568  C~2ncJ      
2017 03  29.47339  13 39 09.552  -08 03 58.06        612156    568  C~2ncJ      
2017 05  27.26566  13 35 13.897  -07 40 55.82  24.1w 612156    568  C~2WX0      
2017 05  27.26965  13 35 13.867  -07 40 55.53  24.1w 612156    568  C~2WX0      
2017 05  28.26731  13 35 10.826  -07 40 38.92  24.1w 612156    568  C~2WX0      
2017 05  28.27130  13 35 10.813  -07 40 38.92  24.4w 612156    568  C~2WX0      

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    -0.14       0.00    -0.23
     2   0.0001      0.00    -0.16       0.00     0.00
     3   0.0002      0.00    -0.20       0.00     0.07
     4   0.0027      0.00    -0.02       0.00    -0.27
     5   0.0027      0.00     0.13       0.00    -0.16
     6   0.9059      0.00     0.13       0.00    -0.31
     7   0.9062      0.00     0.06       0.00    -0.26
     8   0.9089      0.00    -0.67       0.00     0.06
     9   0.9855      0.00    -0.06       0.00     0.06
    10   0.9858      0.00     0.26       0.00    -0.13
    11   1.8751      0.00     0.46       0.00     0.53
    12   1.8752      0.00     0.43       0.00     0.44
    13  12.9527      0.00    -0.15       0.00     0.41
    14  12.9529      0.00    -0.43       0.00    -0.16
    15  12.9554      0.00     0.07       0.00     0.48
    16  13.1248      0.00     0.41       0.00     0.81
    17  13.1249      0.00    -0.48       0.00    -0.12
    18  14.8890      0.00    -0.16       0.00     0.04
    19  14.8891      0.00    -0.18       0.00     0.06
    20  14.8973      0.00    -0.20       0.00     0.01
    21  14.9683      0.00    -0.19       0.00    -0.01
    22  14.9684      0.00    -0.14       0.00    -0.02
    23  14.9738      0.00    -0.18       0.00    -0.09
    24  15.0339      0.00    -0.02       0.00    -0.06
    25  15.0390      0.00     0.06       0.00     0.02
    26  15.0391      0.00     0.14       0.00     0.05
    27  15.0393      0.00     0.08       0.00    -0.02
    28  15.0555      0.00    -0.01       0.00    -0.02
    29  15.1347      0.00     0.16       0.00    -0.08
    30  15.2249      0.00     0.19       0.00    -0.08
    31  15.2250      0.00     0.17       0.00    -0.10
    32  15.2305      0.00     0.14       0.00    -0.14
    33  15.2906      0.00     0.15       0.00    -0.08
    34  15.3070      0.00     0.12       0.00    -0.06
    35  15.8526      0.00    -0.14       0.00    -0.00
    36  15.8692      0.00     0.10       0.00    -0.24
    37  15.8718      0.00    -0.12       0.00     0.03
    38  15.9512      0.00    -0.24       0.00     0.09
    39  15.9537      0.00     0.02       0.00    -0.05
    40  16.0138      0.00     0.00       0.00    -0.03
    41  16.0302      0.00     0.08       0.00    -0.04
    42  16.9097      0.00    -0.11       0.00    -0.03
    43  16.9996      0.00    -0.05       0.00    -0.03
    44  17.1605      0.00     0.23       0.00    -0.23
    45  17.1605      0.00    -0.03       0.00    -0.00
    46  17.1633      0.00     0.20       0.00    -0.02
    47  17.1633      0.00     0.19       0.00    -0.08

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.

612156    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        44.862    44.862    44.862
ecceobj         0.097     0.097     0.097
incobj          4.474     4.474     4.474
qmin           40.192    40.190    40.194
qmax           50.423    50.330    50.487
amean          45.225    45.243    45.199
amin           44.815    44.814    44.815
amax           45.564    45.567    45.580
emean           0.095     0.095     0.095
emin            0.082     0.081     0.083
emax            0.108     0.107     0.109
imean           4.787     4.787     4.788
imin            4.205     4.205     4.205
imax            5.325     5.319     5.328
excite_mean     0.127     0.127     0.127
fracstop        1.000     1.000     1.000
cjmean          3.097     3.097     3.096

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       181.4     181.4     181.3
kozaiamp        180.0     180.0     180.0