Orbit Fit and Astrometric record for 501581

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: 501581    
# Created Fri Dec 15 02:36:52 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   65 observations of   65
# Arc:   5.08y
# First observation: 2012/08/25
#  Last observation: 2017/09/25
# Chi-squared of fit:   106.02 DOF:  124 RMS:  0.23
# Min/Max residuals:    -1.15    0.85
# Exact a, adot, b, bdot, g, gdot:
  1.576209E-05  3.150428E-02  6.503630E-06  1.155897E-02  2.877599E-02 -2.552718E-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
   -5.236030   -4.908924    0.390463   -0.084996   -0.927477  2456164.997698
# Heliocentric elements and errors
Epoch:              2456164.5000  =  2012/08/25
Mean Anomaly:          345.31346 +/-     0.000
Argument of Peri:       10.56314 +/-     0.000
Long of Asc Node:        8.11648 +/-     0.000
Inclination:            20.71020 +/-     0.000
Eccentricity:         0.25273912 +/-    0.0000
Semi-Major Axis:     46.84037650 +/-    0.0000
Time of Perihelion: 2460941.3968 +/-       0.0
Perihelion:          35.00198110 +/-    0.0000
Aphelion:            58.67877190 +/-    0.0000
Period (y)              320.5817 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           35.37589713 +/-    0.0000
Ecliptic Y           -3.42731239 +/-    0.0000
Ecliptic Z           -3.17110086 +/-    0.0000
Ecliptic XDOT         0.00010983 +/-    0.0000
Ecliptic YDOT         0.00300125 +/-    0.0000
Ecliptic ZDOT         0.00111746 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   35.68277491 +/-    0.0000
Geocenter to KBO     34.75127052 +/-    0.0000
# Hcoef:  6.29

The following table shows the complete astrometric record for 501581. 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 (501581) followed by the observatory code and reference code for the source of the astrometry.

2012 08  25.49692  23 50 19.875  -06 45 18.18  21.7w 501581    F51  C~1vXe      
2012 08  25.51113  23 50 19.793  -06 45 18.74  21.6w 501581    F51  C~1vXe      
2012 08  25.52536  23 50 19.734  -06 45 18.92  21.9w 501581    F51  C~1vXe      
2012 08  25.53963  23 50 19.652  -06 45 19.02  22.0w 501581    F51  C~1vXe      
2012 10  21.34738  23 45 30.993  -07 08 41.70  21.6i 501581    F51  C~1vXe      
2012 10  21.35880  23 45 30.932  -07 08 42.29  21.4i 501581    F51  C~1vXe      
2012 10  21.37018  23 45 30.894  -07 08 42.07  21.7r 501581    F51  C~1vXe      
2012 10  21.38050  23 45 30.844  -07 08 42.31  21.5r 501581    F51  C~1vXe      
2013 01  07.22000  23 44 22.540  -06 56 00.72  22.2w 501581    F51  C~1vXe      
2013 01  07.22532  23 44 22.557  -06 56 00.89  22.1w 501581    F51  C~1vXe      
2013 01  07.23590  23 44 22.595  -06 56 00.16  21.9w 501581    F51  C~1vXe      
2013 08  14.51016  23 56 45.348  -05 20 32.91  21.9w 501581    F51  C~1vXe      
2013 08  14.52422  23 56 45.290  -05 20 33.41  21.8w 501581    F51  C~1vXe      
2013 08  14.53826  23 56 45.232  -05 20 33.73  21.8w 501581    F51  C~1vXe      
2013 08  14.55248  23 56 45.167  -05 20 34.05  21.8w 501581    F51  C~1vXe      
2013 09  04.46574  23 55 08.533  -05 29 46.82  21.8w 501581    F51  C~1vXe      
2013 09  04.48074  23 55 08.449  -05 29 47.33  21.7w 501581    F51  C~1vXe      
2013 09  04.49570  23 55 08.361  -05 29 47.81  21.6w 501581    F51  C~1vXe      
2013 10  21.32729  23 51 07.819  -05 49 06.52  21.3r 501581    F51  C~1vXe      
2013 10  21.33847  23 51 07.770  -05 49 06.24  21.4i 501581    F51  C~1vXe      
2013 10  21.35008  23 51 07.726  -05 49 06.47  21.4i 501581    F51  C~1vXe      
2014 07  26.57566  00 03 21.921  -03 54 10.32  22.0w 501581    F51  C~1vXe      
2014 07  26.58501  00 03 21.901  -03 54 10.39  21.9w 501581    F51  C~1vXe      
2014 07  26.59440  00 03 21.874  -03 54 10.41  21.8w 501581    F51  C~1vXe      
2014 07  26.60378  00 03 21.849  -03 54 10.46  21.9w 501581    F51  C~1vXe      
2014 08  04.51754  00 02 56.920  -03 56 40.23  22.0w 501581    F51  C~1vXe      
2014 08  04.52891  00 02 56.889  -03 56 40.42  21.9w 501581    F51  C~1vXe      
2014 08  04.54024  00 02 56.850  -03 56 40.68  21.8w 501581    F51  C~1vXe      
2014 08  04.55159  00 02 56.805  -03 56 40.67  21.8w 501581    F51  C~1vXe      
2014 08  05.51931  00 02 53.700  -03 56 59.32  22.0w 501581    F51  C~1vXe      
2014 08  05.53072  00 02 53.668  -03 56 59.56  21.8w 501581    F51  C~1vXe      
2014 08  05.54210  00 02 53.635  -03 56 59.85  22.0w 501581    F51  C~1vXe      
2014 08  05.55346  00 02 53.587  -03 57 00.00  21.9w 501581    F51  C~1vXe      
2014 10  25.31792  23 56 26.603  -04 30 02.56  21.9w 501581    F51  C~1vXe      
2014 10  25.33104  23 56 26.572  -04 30 02.84  22.0w 501581    F51  C~1vXe      
2014 10  25.34417  23 56 26.528  -04 30 02.57  22.1w 501581    F51  C~1vXe      
2014 10  25.35729  23 56 26.466  -04 30 03.05  22.0w 501581    F51  C~1vXe      
2014 11  11.25997  23 55 22.992  -04 33 27.95  21.8w 501581    F51  C~1vXe      
2014 11  11.27074  23 55 22.983  -04 33 27.60  21.7w 501581    F51  C~1vXe      
2014 11  11.28151  23 55 22.939  -04 33 28.13  21.9w 501581    F51  C~1vXe      
2014 11  11.29230  23 55 22.910  -04 33 27.77  21.6w 501581    F51  C~1vXe      
2014 11  18.21461  23 55 03.640  -04 34 02.24  21.6w 501581    F51  C~1vXe      
2014 11  18.22688  23 55 03.610  -04 34 02.29  21.8w 501581    F51  C~1vXe      
2014 11  18.23915  23 55 03.552  -04 34 02.42  21.9w 501581    F51  C~1vXe      
2014 11  18.25146  23 55 03.563  -04 34 02.29  21.6w 501581    F51  C~1vXe      
2014 11  21.26158  23 54 56.550  -04 34 07.18  21.9w 501581    F51  C~1vXe      
2014 11  21.27443  23 54 56.537  -04 34 07.15  21.8w 501581    F51  C~1vXe      
2014 11  21.28731  23 54 56.500  -04 34 07.29  21.8w 501581    F51  C~1vXe      
2014 11  21.30022  23 54 56.463  -04 34 07.24  21.8w 501581    F51  C~1vXe      
2014 11  23.25681  23 54 52.405  -04 34 07.06  21.8w 501581    F51  C~1vXe      
2014 11  23.26967  23 54 52.383  -04 34 06.95  21.8w 501581    F51  C~1vXe      
2014 11  23.28253  23 54 52.347  -04 34 06.87  21.7w 501581    F51  C~1vXe      
2014 11  23.29541  23 54 52.322  -04 34 07.04  21.7w 501581    F51  C~1vXe      
2014 12  18.21753  23 54 35.306  -04 30 10.11  21.8w 501581    F51  C~1vXf      
2014 12  18.22961  23 54 35.316  -04 30 09.87  21.9w 501581    F51  C~1vXf      
2014 12  18.24168  23 54 35.308  -04 30 09.63  22.1w 501581    F51  C~1vXf      
2014 12  18.25372  23 54 35.317  -04 30 09.45  22.0w 501581    F51  C~1vXf      
2016 11  01.97101  00 07 03.24   -01 50 37.2   21.5R 501581    G36  C~20r4      
2016 11  01.99374  00 07 03.08   -01 50 37.4   21.5R 501581    G36  C~20r4      
2017 08  24.52104  00 18 27.801  -00 00 19.78  22.0w 501581    F51  C~2Jcn      
2017 08  24.54573  00 18 27.695  -00 00 20.04  22.2w 501581    F51  C~2Jcn      
2017 08  24.55795  00 18 27.592  -00 00 20.50  22.1w 501581    F51  C~2Jcn      
2017 09  25.43928  00 15 48.074  -00 14 08.32  21.8w 501581    F51  C~2LT6      
2017 09  25.45197  00 15 48.034  -00 14 08.57  22.0w 501581    F51  C~2LT6      
2017 09  25.46463  00 15 47.934  -00 14 09.08  22.1w 501581    F51  C~2LT6      

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    -0.23       0.00    -1.15
  2   0.0000      0.00     0.17       0.00    -0.05
  3   0.0001      0.00     0.32       0.00     0.16
  4   0.0001      0.00     0.13       0.00     0.45
  5   0.1556      0.00    -0.11       0.00     0.26
  6   0.1557      0.00    -0.26       0.00    -0.15
  7   0.1557      0.00    -0.07       0.00     0.25
  8   0.1557      0.00    -0.13       0.00     0.16
  9   0.3689      0.00    -0.10       0.00    -0.23
 10   0.3689      0.00    -0.09       0.00    -0.58
 11   0.3689      0.00     0.00       0.00    -0.23
 12   0.9692      0.00     0.09       0.00     0.07
 13   0.9693      0.00     0.09       0.00    -0.09
 14   0.9693      0.00     0.09       0.00    -0.07
 15   0.9694      0.00     0.00       0.00    -0.05
 16   1.0266      0.00     0.25       0.00     0.09
 17   1.0266      0.00     0.16       0.00    -0.00
 18   1.0267      0.00     0.00       0.00    -0.06
 19   1.1549      0.00    -0.01       0.00    -0.42
 20   1.1549      0.00     0.02       0.00     0.06
 21   1.1550      0.00     0.16       0.00     0.02
 22   1.9167      0.00     0.00       0.00    -0.00
 23   1.9167      0.00     0.05       0.00     0.07
 24   1.9168      0.00     0.00       0.00     0.18
 25   1.9168      0.00    -0.02       0.00     0.27
 26   1.9412      0.00    -0.06       0.00    -0.08
 27   1.9412      0.00     0.03       0.00    -0.05
 28   1.9413      0.00     0.00       0.00    -0.10
 29   1.9413      0.00    -0.11       0.00     0.12
 30   1.9439      0.00    -0.09       0.00    -0.09
 31   1.9440      0.00     0.00       0.00    -0.11
 32   1.9440      0.00     0.08       0.00    -0.18
 33   1.9440      0.00    -0.07       0.00    -0.11
 34   2.1651      0.00    -0.47       0.00    -0.27
 35   2.1652      0.00    -0.06       0.00    -0.33
 36   2.1652      0.00     0.16       0.00     0.16
 37   2.1653      0.00     0.11       0.00    -0.10
 38   2.2115      0.00    -0.16       0.00     0.07
 39   2.2116      0.00     0.22       0.00     0.50
 40   2.2116      0.00     0.08       0.00     0.05
 41   2.2116      0.00     0.16       0.00     0.49
 42   2.2306      0.00     0.10       0.00     0.03
 43   2.2306      0.00     0.12       0.00     0.02
 44   2.2306      0.00    -0.28       0.00    -0.08
 45   2.2307      0.00     0.36       0.00     0.08
 46   2.2389      0.00     0.01       0.00     0.06
 47   2.2390      0.00     0.25       0.00     0.09
 48   2.2390      0.00     0.14       0.00    -0.04
 49   2.2390      0.00     0.02       0.00     0.02
 50   2.2444      0.00     0.05       0.00     0.01
 51   2.2444      0.00     0.13       0.00     0.11
 52   2.2445      0.00    -0.01       0.00     0.18
 53   2.2445      0.00     0.01       0.00     0.00
 54   2.3127      0.00     0.06       0.00     0.04
 55   2.3128      0.00     0.11       0.00     0.06
 56   2.3128      0.00    -0.11       0.00     0.07
 57   2.3128      0.00    -0.07       0.00     0.03
 58   4.1875      0.00     0.85       0.00    -0.55
 59   4.1875      0.00    -0.15       0.00    -0.39
 60   4.9966      0.00     0.38       0.00    -0.03
 61   4.9967      0.00     0.42       0.00     0.27
 62   4.9967      0.00    -0.31       0.00     0.08
 63   5.0840      0.00    -0.29       0.00     0.12
 64   5.0841      0.00     0.16       0.00     0.22
 65   5.0841      0.00    -0.30       0.00     0.06

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.

501581    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        46.949    46.948    46.949
ecceobj         0.254     0.254     0.254
incobj         20.686    20.686    20.686
qmin           33.575    32.904    33.642
qmax           60.406    60.219    60.587
amean          46.726    46.362    46.712
amin           46.164    45.533    46.151
amax           47.273    47.159    47.401
emean           0.260     0.263     0.259
emin            0.240     0.237     0.238
emax            0.280     0.287     0.279
imean          20.405    19.994    20.447
imin           19.551    18.984    19.670
imax           21.134    21.134    21.134
excite_mean     0.435     0.431     0.435
fracstop        1.000     1.000     1.000
cjmean          2.899     2.899     2.898

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       167.8     167.6     167.1
kozaiamp        180.0     179.9     179.9