Orbit Fit and Astrometric record for 487581

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: 487581    
# Created Sat Oct 21 01:36:53 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   68 observations of   68
# Arc:  13.25y
# First observation: 2002/12/07
#  Last observation: 2016/03/09
# Chi-squared of fit:   112.45 DOF:  130 RMS:  0.23
# Min/Max residuals:    -0.40    1.24
# Exact a, adot, b, bdot, g, gdot:
  1.352248E-05  1.843858E-02  6.354998E-06  8.502964E-03  2.171772E-02  1.571341E-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
   -1.575834  150.896462    0.951148   -0.006599   -0.239267  2452615.989606
# Heliocentric elements and errors
Epoch:              2452616.5000  =  2002/12/08
Mean Anomaly:           55.16346 +/-     0.000
Argument of Peri:      294.13397 +/-     0.000
Long of Asc Node:      153.12781 +/-     0.000
Inclination:            24.67905 +/-     0.000
Eccentricity:         0.07035530 +/-    0.0000
Semi-Major Axis:     48.05937536 +/-    0.0000
Time of Perihelion: 2433969.2575 +/-       0.0
Perihelion:          44.67814358 +/-    0.0000
Aphelion:            51.44060715 +/-    0.0000
Period (y)              333.1773 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -39.96455372 +/-    0.0000
Ecliptic Y           23.33931686 +/-    0.0000
Ecliptic Z           -1.26594764 +/-    0.0000
Ecliptic XDOT        -0.00133665 +/-    0.0000
Ecliptic YDOT        -0.00192410 +/-    0.0000
Ecliptic ZDOT         0.00106628 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   46.29781950 +/-    0.0000
Geocenter to KBO     46.04532276 +/-    0.0000
# Hcoef:  5.37

The following table shows the complete astrometric record for 487581. 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 (487581) followed by the observatory code and reference code for the source of the astrometry.

2002 12  07.488863 10 09 30.87   +09 40 53.3   22.1V 487581    645  C~2AE2      
2002 12  07.489693 10 09 30.88   +09 40 53.3   21.5V 487581    645  C~2AE2      
2002 12  07.492180 10 09 30.87   +09 40 53.3   23.1V 487581    645  C~2AE2      
2003 03  31.114902 10 03 23.58   +10 23 21.2   22.1V 487581    645  C~2AE2      
2003 03  31.115731 10 03 23.57   +10 23 21.3   21.6V 487581    645  C~2AE2      
2003 03  31.118219 10 03 23.58   +10 23 21.3   22.8V 487581    645  C~2AE2      
2003 03  31.137330 10 03 23.52   +10 23 21.6   21.8V 487581    645  C~2AE2      
2003 03  31.138160 10 03 23.52   +10 23 21.7   21.3V 487581    645  C~2AE2      
2003 03  31.140648 10 03 23.52   +10 23 21.8   22.5V 487581    645  C~2AE2      
2006 04  27.02594  10 16 39.88   +10 46 14.3   20.7R 487581    807  C~1w1E      
2006 04  27.14349  10 16 39.73   +10 46 15.8         487581    807  C~1w1E      
2006 04  28.02829  10 16 38.53   +10 46 27.1         487581    807  C~1wb3      
2015 01  20.44235  11 04 27.366  +10 34 09.48  22.1w 487581    F51  C~1vYC      
2015 01  20.45578  11 04 27.329  +10 34 09.80  22.3w 487581    F51  C~1vYC      
2015 01  20.46923  11 04 27.284  +10 34 10.20  22.1w 487581    F51  C~1vYD      
2015 01  20.48260  11 04 27.252  +10 34 10.48  22.1w 487581    F51  C~1vYD      
2015 01  22.45325  11 04 21.881  +10 35 02.06  22.2w 487581    F51  C~1vYD      
2015 01  22.46682  11 04 21.844  +10 35 02.41  22.1w 487581    F51  C~1vYD      
2015 01  22.48048  11 04 21.808  +10 35 02.69  22.2w 487581    F51  C~1vYD      
2015 01  22.49423  11 04 21.774  +10 35 02.97  22.4w 487581    F51  C~1vYD      
2015 01  27.60726  11 04 06.754  +10 37 22.14  22.3w 487581    F51  C~1vYD      
2015 01  27.61946  11 04 06.704  +10 37 22.38  22.0w 487581    F51  C~1vYD      
2015 01  27.63160  11 04 06.675  +10 37 22.59  22.3w 487581    F51  C~1vYD      
2015 01  27.64368  11 04 06.655  +10 37 23.01  22.2w 487581    F51  C~1vYD      
2015 01  29.62018  11 04 00.468  +10 38 18.64  22.1w 487581    F51  C~1vYD      
2015 01  29.63234  11 04 00.410  +10 38 18.95  22.0w 487581    F51  C~1vYD      
2015 01  29.64448  11 04 00.367  +10 38 19.17  22.2w 487581    F51  C~1vYD      
2015 01  29.65658  11 04 00.343  +10 38 19.65  22.1w 487581    F51  C~1vYD      
2015 02  16.34059  11 02 57.306  +10 47 06.32  22.2w 487581    F51  C~1vYD      
2015 02  16.35312  11 02 57.268  +10 47 06.90  22.2w 487581    F51  C~1vYD      
2015 02  16.36568  11 02 57.207  +10 47 07.06  22.1w 487581    F51  C~1vYD      
2015 02  16.37822  11 02 57.161  +10 47 07.51  22.1w 487581    F51  C~1vYD      
2015 02  16.40189  11 02 57.076  +10 47 08.13  22.1w 487581    F51  C~1vYD      
2015 02  16.41333  11 02 57.036  +10 47 08.74  22.1w 487581    F51  C~1vYD      
2015 02  16.42475  11 02 56.990  +10 47 08.98  22.1w 487581    F51  C~1vYD      
2015 02  16.43621  11 02 56.933  +10 47 09.23  22.3w 487581    F51  C~1vYD      
2015 02  17.39225  11 02 53.220  +10 47 38.77  22.3w 487581    F51  C~1vYD      
2015 02  17.40507  11 02 53.170  +10 47 39.22  22.2w 487581    F51  C~1vYD      
2015 02  17.41793  11 02 53.126  +10 47 39.60  21.8w 487581    F51  C~1vYD      
2015 02  17.43088  11 02 53.063  +10 47 40.04  22.0w 487581    F51  C~1vYD      
2015 02  17.53546  11 02 52.659  +10 47 43.09  22.7w 487581    F51  C~1vYD      
2015 02  17.54715  11 02 52.604  +10 47 43.44  22.5w 487581    F51  C~1vYD      
2015 02  17.55896  11 02 52.543  +10 47 43.90  22.5w 487581    F51  C~1vYD      
2015 02  17.57082  11 02 52.510  +10 47 44.35  22.4w 487581    F51  C~1vYD      
2015 03  14.32106  11 01 12.250  +11 00 14.91  22.2w 487581    F51  C~1vYD      
2015 03  14.33366  11 01 12.177  +11 00 15.20  21.9w 487581    F51  C~1vYD      
2015 03  14.34631  11 01 12.136  +11 00 15.49  22.1w 487581    F51  C~1vYD      
2015 03  17.29044  11 01 00.340  +11 01 39.88  22.1R 487581    568  C~1w1E      
2015 03  17.38485  11 00 59.958  +11 01 42.61        487581    568  C~1w1E      
2015 03  17.50028  11 00 59.476  +11 01 45.87        487581    568  C~1w1E      
2015 03  21.19629  11 00 44.831  +11 03 28.72        487581    304  C~1w1E      
2015 03  21.23222  11 00 44.669  +11 03 29.55        487581    304  C~1w1E      
2015 03  25.49068  11 00 28.271  +11 05 22.65  22.2w 487581    F51  C~1vYD      
2015 03  25.50221  11 00 28.213  +11 05 22.91  22.0w 487581    F51  C~1vYD      
2015 03  25.51368  11 00 28.168  +11 05 23.19  22.2w 487581    F51  C~1vYD      
2015 03  25.52515  11 00 28.136  +11 05 23.58  22.2w 487581    F51  C~1vYD      
2015 04  16.41169  10 59 14.603  +11 13 31.77  22.0w 487581    F51  C~1vYD      
2015 04  16.42335  10 59 14.581  +11 13 32.05  22.1w 487581    F51  C~1vYD      
2015 04  16.43497  10 59 14.549  +11 13 32.19  22.3w 487581    F51  C~1vYD      
2015 04  18.39994  10 59 09.081  +11 14 06.99  22.4w 487581    F51  C~1vYD      
2015 04  18.41154  10 59 09.038  +11 14 07.02  22.3w 487581    F51  C~1vYD      
2015 04  18.43487  10 59 08.999  +11 14 07.66  22.1w 487581    F51  C~1vYD      
2015 04  20.03981  10 59 04.711  +11 14 35.04  22.1R 487581    304  C~1w1E      
2015 04  20.07537  10 59 04.607  +11 14 35.48        487581    304  C~1w1E      
2015 05  21.96685  10 58 15.996  +11 19 18.94        487581    304  C~1w1E      
2015 05  23.01939  10 58 15.668  +11 19 19.81        487581    304  C~1w1E      
2016 03  08.17497  11 06 15.174  +10 59 26.06        487581    304  C~1w1E      
2016 03  09.21982  11 06 10.901  +10 59 57.47        487581    304  C~1w1E      

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    -0.17       0.00     1.24
  2   0.0000      0.00     0.13       0.00    -0.03
  3   0.0000      0.00     0.01       0.00    -0.05
  4   0.3111      0.00    -0.13       0.00    -0.05
  5   0.3111      0.00    -0.24       0.00     0.03
  6   0.3111      0.00     0.02       0.00    -0.03
  7   0.3112      0.00    -0.00       0.00    -0.17
  8   0.3112      0.00     0.04       0.00    -0.08
  9   0.3112      0.00     0.15       0.00    -0.04
 10   3.3855      0.00     0.01       0.00     0.16
 11   3.3858      0.00     0.32       0.00     0.15
 12   3.3882      0.00     0.11       0.00     0.25
 13  12.1203      0.00     0.02       0.00    -0.13
 14  12.1204      0.00     0.01       0.00    -0.16
 15  12.1204      0.00    -0.11       0.00    -0.11
 16  12.1204      0.00    -0.04       0.00    -0.18
 17  12.1258      0.00    -0.07       0.00    -0.15
 18  12.1259      0.00    -0.04       0.00    -0.16
 19  12.1259      0.00     0.00       0.00    -0.25
 20  12.1260      0.00     0.08       0.00    -0.33
 21  12.1400      0.00     0.01       0.00    -0.04
 22  12.1400      0.00    -0.16       0.00    -0.13
 23  12.1400      0.00    -0.02       0.00    -0.26
 24  12.1401      0.00     0.25       0.00    -0.17
 25  12.1455      0.00     0.23       0.00    -0.00
 26  12.1455      0.00    -0.05       0.00    -0.04
 27  12.1455      0.00    -0.11       0.00    -0.16
 28  12.1456      0.00     0.12       0.00    -0.02
 29  12.1940      0.00    -0.23       0.00    -0.07
 30  12.1940      0.00    -0.06       0.00     0.13
 31  12.1941      0.00    -0.24       0.00    -0.10
 32  12.1941      0.00    -0.19       0.00    -0.04
 33  12.1941      0.00    -0.06       0.00    -0.15
 34  12.1942      0.00     0.01       0.00     0.10
 35  12.1942      0.00    -0.00       0.00    -0.01
 36  12.1942      0.00    -0.18       0.00    -0.11
 37  12.1969      0.00    -0.11       0.00    -0.03
 38  12.1969      0.00    -0.10       0.00     0.02
 39  12.1969      0.00     0.01       0.00     0.01
 40  12.1970      0.00    -0.16       0.00     0.05
 41  12.1973      0.00     0.02       0.00    -0.13
 42  12.1973      0.00    -0.11       0.00    -0.14
 43  12.1973      0.00    -0.32       0.00    -0.04
 44  12.1973      0.00    -0.10       0.00     0.04
 45  12.2651      0.00     0.39       0.00    -0.01
 46  12.2651      0.00     0.07       0.00    -0.08
 47  12.2652      0.00     0.24       0.00    -0.16
 48  12.2732      0.00     0.76       0.00     0.24
 49  12.2735      0.00     0.78       0.00     0.30
 50  12.2738      0.00     0.59       0.00     0.31
 51  12.2839      0.00     0.07       0.00     0.52
 52  12.2840      0.00    -0.21       0.00     0.38
 53  12.2957      0.00     0.17       0.00     0.01
 54  12.2957      0.00    -0.04       0.00    -0.03
 55  12.2958      0.00    -0.05       0.00    -0.04
 56  12.2958      0.00     0.13       0.00     0.05
 57  12.3557      0.00    -0.04       0.00    -0.22
 58  12.3557      0.00     0.14       0.00    -0.15
 59  12.3558      0.00     0.16       0.00    -0.22
 60  12.3612      0.00    -0.17       0.00    -0.08
 61  12.3612      0.00    -0.34       0.00    -0.25
 62  12.3612      0.00     0.05       0.00    -0.01
 63  12.3656      0.00    -0.27       0.00     0.18
 64  12.3657      0.00    -0.40       0.00     0.04
 65  12.4531      0.00     0.19       0.00     0.12
 66  12.4559      0.00     0.07       0.00     0.19
 67  13.2503      0.00     0.49       0.00     0.15
 68  13.2532      0.00     0.52       0.00     0.33

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.

487581    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        47.688    47.689    47.688
ecceobj         0.068     0.068     0.068
incobj         24.777    24.777    24.777
qmin           38.432    38.037    37.768
qmax           57.723    57.872    58.591
amean          47.798    47.797    47.797
amin           47.292    47.320    47.304
amax           48.330    48.336    48.361
emean           0.109     0.096     0.117
emin            0.000     0.001     0.002
emax            0.195     0.201     0.213
imean          23.216    23.276    22.914
imin           21.513    21.633    21.127
imax           24.436    24.471    24.390
excite_mean     0.411     0.410     0.410
fracstop        1.000     1.000     1.000
cjmean          2.929     2.930     2.931

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       271.9     235.3     258.3
kozaiamp        179.5     179.9     172.3