Orbit Fit and Astrometric record for 01RU143

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: 01RU143   
# Created Wed Feb 20 02:08:18 2019
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   73 observations of   73
# Arc:  16.40y
# First observation: 2001/09/12
#  Last observation: 2018/02/04
# Chi-squared of fit:   107.86 DOF:  140 RMS:  0.21
# Min/Max residuals:    -0.69    1.07
# Exact a, adot, b, bdot, g, gdot:
  1.298102E-05  2.063300E-02 -2.938900E-06 -2.255144E-03  2.331662E-02  2.280003E-03
# Covariance matrix:
  1.4204E-13 -2.4321E-14 -4.4180E-15  1.8993E-15  1.7235E-14 -5.0887E-14
 -2.4321E-14  9.7345E-15  2.3903E-15 -1.0112E-15  1.0891E-14  2.6989E-14
 -4.4180E-15  2.3903E-15  9.2702E-14 -7.5351E-15  3.1318E-15  7.1698E-15
  1.8993E-15 -1.0112E-15 -7.5351E-15  8.4837E-16 -1.2598E-15 -3.0327E-15
  1.7235E-14  1.0891E-14  3.1318E-15 -1.2598E-15  9.4415E-14  3.3213E-14
 -5.0887E-14  2.6989E-14  7.1698E-15 -3.0327E-15  3.3213E-14  8.0942E-14
#      lat0       lon0       xBary       yBary       zBary        JD0
    2.006780   12.240255    0.392216    0.032274   -0.924727  2452164.826773
# Heliocentric elements and errors
Epoch:              2452164.5000  =  2001/09/12
Mean Anomaly:          132.80038 +/-     0.014
Argument of Peri:       18.75915 +/-     0.009
Long of Asc Node:      209.26739 +/-     0.000
Inclination:             6.49404 +/-     0.000
Eccentricity:         0.14519982 +/-    0.0000
Semi-Major Axis:     39.53020994 +/-    0.0017
Time of Perihelion: 2418676.5221 +/-       4.1
Perihelion:          33.79043040 +/-    0.0018
Aphelion:            45.26998948 +/-    0.0022
Period (y)              248.5432 +/-      0.02
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           42.87697764 +/-    0.0006
Ecliptic Y            8.90610801 +/-    0.0001
Ecliptic Z            1.50173258 +/-    0.0000
Ecliptic XDOT        -0.00025178 +/-    0.0000
Ecliptic YDOT         0.00242740 +/-    0.0000
Ecliptic ZDOT        -0.00025505 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   43.81785043 +/-    0.0005
Geocenter to KBO     42.88782341 +/-    0.0006
# Hcoef:  6.25

The following table shows the complete astrometric record for 01RU143. 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 (01RU143) followed by the observatory code and reference code for the source of the astrometry.

2001 09  12.32603  00 41 52.56   +06 41 05.8   22.0R 01RU143   695  Ce0436      
2001 09  12.41952  00 41 52.17   +06 41 03.1         01RU143   695  Ce0436      
2001 10  18.28284  00 39 19.27   +06 24 10.4   22.7R 01RU143   688  Ce0436      
2001 10  18.36006  00 39 18.97   +06 24 08.0         01RU143   688  Ce0436      
2001 11  03.05182  00 38 16.99   +06 16 54.0   20.6  01RU143   304  Ce6603      
2001 11  03.09817  00 38 16.83   +06 16 53.0         01RU143   304  Ce6603      
2002 08  11.38527  00 48 09.33   +07 12 06.3   21.4R 01RU143   807  C47440      
2002 08  12.32833  00 48 07.22   +07 11 53.9         01RU143   807  Cg7894      
2002 08  12.40579  00 48 07.04   +07 11 53.0         01RU143   807  Cg7894      
2002 11  07.12365  00 42 37.53   +06 35 55.3   22.2R 01RU143   695  Cg7894      
2002 11  07.23070  00 42 37.14   +06 35 52.5         01RU143   695  Cg7894      
2004 11  18.26016  00 51 04.00   +07 11 48.0   22.3R 01RU143   568  Cm0414      
2004 11  18.31741  00 51 03.81   +07 11 46.8         01RU143   568  Cm0414      
2005 09  28.290393 00 59 00.53   +07 54 36.0   21.0V 01RU143   645  C~1ReA      
2005 09  28.291222 00 59 00.53   +07 54 36.0   21.3V 01RU143   645  C~1ReA      
2005 09  28.293710 00 59 00.52   +07 54 36.0   22.2V 01RU143   645  C~1ReA      
2007 11  11.24415  01 05 02.01   +08 13 38.1   22.5R 01RU143   688  Cw6713      
2007 11  11.30887  01 05 01.70   +08 13 37.7         01RU143   688  Cw6713      
2008 09  21.37740  01 13 02.58   +08 55 18.4   24.2R 01RU143   250  S~06AQ      
2008 09  21.38365  01 13 02.55   +08 55 18.2         01RU143   250  S~06AQ      
2008 09  21.39060  01 13 02.52   +08 55 18.0         01RU143   250  S~06AQ      
2008 09  21.39754  01 13 02.50   +08 55 17.9         01RU143   250  S~06AQ      
2008 11  01.367200 01 10 07.95   +08 36 42.1   23.1V 01RU143   645  C~1ReA      
2008 11  01.368030 01 10 07.95   +08 36 42.0   22.1V 01RU143   645  C~1ReA      
2008 11  01.370517 01 10 07.94   +08 36 42.0   24.8V 01RU143   645  C~1ReA      
2010 09  28.41370  01 21 37.833  +09 29 52.21  22.9G 01RU143   F51  C~2rXe      
2010 10  06.47511  01 21 03.614  +09 26 19.41  23.0G 01RU143   F51  C~2rXe      
2010 10  07.54012  01 20 58.985  +09 25 50.76  22.0G 01RU143   F51  C~2rXe      
2010 10  13.45366  01 20 33.222  +09 23 09.61  22.7G 01RU143   F51  C~2rXe      
2010 10  13.46877  01 20 33.154  +09 23 08.91  22.3G 01RU143   F51  C~2rXe      
2010 10  13.48334  01 20 33.078  +09 23 08.94  22.4G 01RU143   F51  C~2rXe      
2010 11  01.29169  01 19 12.090  +09 14 35.80  22.8G 01RU143   F51  C~2rXe      
2012 10  17.39291  01 29 15.463  +09 57 41.01  22.2G 01RU143   F51  C~2rXe      
2012 10  17.40632  01 29 15.394  +09 57 40.38  23.1G 01RU143   F51  C~2rXe      
2012 10  17.43328  01 29 15.279  +09 57 39.20  23.4G 01RU143   F51  C~2rXe      
2012 11  06.28545  01 27 50.345  +09 48 51.79  23.1G 01RU143   F51  C~2rXe      
2012 11  06.30033  01 27 50.297  +09 48 51.49  22.7G 01RU143   F51  C~2rXe      
2012 11  06.31529  01 27 50.220  +09 48 50.88  22.7G 01RU143   F51  C~2rXe      
2012 11  06.33023  01 27 50.167  +09 48 50.71  22.3G 01RU143   F51  C~2rXe      
2013 09  08.62358  01 36 20.757  +10 31 09.97  21.5z 01RU143   F51  C~2rXe      
2013 10  05.37660  01 34 38.926  +10 20 55.16  22.7G 01RU143   F51  C~2rXe      
2013 10  07.35181  01 34 30.47   +10 20 04.1   22.2R 01RU143   695  C~0zdD      
2013 10  07.41367  01 34 30.20   +10 20 02.7         01RU143   695  C~0zdD      
2013 10  07.47178  01 34 29.94   +10 20 01.1         01RU143   695  C~0zdD      
2013 11  25.24145  01 31 10.116  +09 59 27.48  22.7G 01RU143   F51  C~2rXe      
2013 11  25.25653  01 31 10.078  +09 59 27.65  23.2G 01RU143   F51  C~2rXe      
2013 11  25.28656  01 31 09.989  +09 59 26.89  22.8G 01RU143   F51  C~2rXe      
2014 08  28.49317  01 41 20.665  +10 51 38.06  23.1G 01RU143   F51  C~2rXe      
2014 09  19.41950  01 40 13.101  +10 44 50.82  23.0G 01RU143   F51  C~2rXe      
2014 09  23.44971  01 39 57.913  +10 43 19.75  23.1G 01RU143   F51  C~2rXe      
2014 09  29.55943  01 39 33.622  +10 40 54.28  21.9G 01RU143   F51  C~2rXe      
2015 09  12.44324  01 45 06.393  +11 04 21.95  22.9G 01RU143   F51  C~2rXe      
2015 09  12.45360  01 45 06.359  +11 04 21.66  22.7G 01RU143   F51  C~2rXe      
2015 09  12.46402  01 45 06.330  +11 04 21.50  22.7G 01RU143   F51  C~2rXe      
2015 09  12.47447  01 45 06.298  +11 04 21.26  22.6G 01RU143   F51  C~2rXe      
2015 12  14.36469  01 39 12.752  +10 28 49.59  22.7G 01RU143   F51  C~2rXe      
2015 12  31.20493  01 38 47.083  +10 25 56.38  22.0G 01RU143   F51  C~2rXe      
2016 08  10.51842  01 50 41.735  +11 27 58.33  23.1G 01RU143   F51  C~2rXe      
2016 08  10.53132  01 50 41.743  +11 27 58.51  22.2G 01RU143   F51  C~2rXe      
2016 08  10.54428  01 50 41.717  +11 27 58.35  22.8G 01RU143   F51  C~2rXe      
2016 08  10.55722  01 50 41.702  +11 27 58.20  22.5G 01RU143   F51  C~2rXf      
2016 10  06.55115  01 47 59.780  +11 11 45.73  22.6G 01RU143   F51  C~2rXf      
2017 09  19.54228  01 53 35.653  +11 34 53.51  22.6G 01RU143   F51  C~2rXf      
2017 09  19.55511  01 53 35.605  +11 34 53.33  23.0G 01RU143   F51  C~2rXf      
2017 09  19.55784  01 53 35.604  +11 34 53.22  22.9G 01RU143   F51  C~2rXf      
2017 09  19.56785  01 53 35.567  +11 34 52.77  22.7G 01RU143   F51  C~2rXf      
2017 09  19.57055  01 53 35.563  +11 34 52.67  22.5G 01RU143   F51  C~2rXf      
2017 09  19.58058  01 53 35.516  +11 34 52.68  22.6G 01RU143   F51  C~2rXf      
2017 09  19.58326  01 53 35.512  +11 34 52.36  22.6G 01RU143   F51  C~2rXf      
2017 10  22.48506  01 51 19.690  +11 21 39.33  22.5G 01RU143   F51  C~2rXf      
2017 11  10.28614  01 49 58.010  +11 13 42.24  23.2G 01RU143   F51  C~2rXf      
2017 11  20.41763  01 49 17.585  +11 09 44.04  22.3G 01RU143   F51  C~2rXf      
2018 02  04.26974  01 47 53.937  +11 00 26.64  22.5G 01RU143   F51  C~2rXf      

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     0.08       0.00     0.35
  2   0.0003      0.00    -0.07       0.00     0.04
  3   0.0984      0.00    -0.29       0.00    -0.09
  4   0.0987      0.00     0.14       0.00    -0.26
  5   0.1416      0.00    -0.11       0.00    -0.15
  6   0.1417      0.00     0.08       0.00     0.06
  7   0.9119      0.00     0.02       0.00     0.14
  8   0.9144      0.00    -0.13       0.00     0.06
  9   0.9147      0.00    -0.12       0.00     0.20
 10   1.1521      0.00    -0.02       0.00     0.07
 11   1.1524      0.00    -0.11       0.00    -0.03
 12   3.1839      0.00     0.06       0.00    -0.03
 13   3.1841      0.00    -0.14       0.00     0.02
 14   4.0437      0.00     0.33       0.00    -0.29
 15   4.0437      0.00     0.38       0.00    -0.27
 16   4.0437      0.00     0.40       0.00    -0.20
 17   6.1627      0.00     0.37       0.00    -0.13
 18   6.1629      0.00    -0.69       0.00     1.07
 19   7.0255      0.00    -0.16       0.00     0.23
 20   7.0255      0.00    -0.23       0.00     0.18
 21   7.0255      0.00    -0.26       0.00     0.16
 22   7.0255      0.00    -0.14       0.00     0.23
 23   7.1377      0.00     0.42       0.00    -0.23
 24   7.1377      0.00     0.47       0.00    -0.31
 25   7.1377      0.00     0.47       0.00    -0.24
 26   9.0434      0.00    -0.31       0.00     0.17
 27   9.0654      0.00    -0.10       0.00    -0.12
 28   9.0683      0.00    -0.32       0.00    -0.05
 29   9.0845      0.00     0.05       0.00    -0.01
 30   9.0846      0.00     0.04       0.00    -0.30
 31   9.0846      0.00    -0.13       0.00     0.13
 32   9.1361      0.00     0.11       0.00    -0.24
 33  11.0967      0.00     0.01       0.00     0.17
 34  11.0967      0.00    -0.13       0.00    -0.10
 35  11.0968      0.00    -0.04       0.00    -0.55
 36  11.1512      0.00     0.02       0.00     0.04
 37  11.1512      0.00     0.22       0.00     0.12
 38  11.1512      0.00    -0.01       0.00    -0.11
 39  11.1513      0.00     0.12       0.00     0.10
 40  11.9899      0.00     0.15       0.00    -0.45
 41  12.0631      0.00    -0.18       0.00    -0.09
 42  12.0685      0.00    -0.03       0.00     0.14
 43  12.0687      0.00    -0.02       0.00     0.36
 44  12.0688      0.00    -0.12       0.00     0.28
 45  12.2024      0.00    -0.43       0.00    -0.35
 46  12.2024      0.00    -0.24       0.00     0.13
 47  12.2025      0.00    -0.07       0.00    -0.00
 48  12.9587      0.00     0.04       0.00     0.25
 49  13.0187      0.00     0.01       0.00    -0.10
 50  13.0298      0.00     0.15       0.00    -0.08
 51  13.0465      0.00    -0.08       0.00    -0.09
 52  13.9990      0.00    -0.00       0.00     0.07
 53  13.9990      0.00     0.00       0.00    -0.02
 54  13.9990      0.00     0.09       0.00     0.02
 55  13.9990      0.00     0.13       0.00    -0.01
 56  14.2534      0.00     0.12       0.00     0.22
 57  14.2995      0.00     0.00       0.00    -0.01
 58  14.9109      0.00    -0.10       0.00    -0.04
 59  14.9109      0.00     0.21       0.00     0.22
 60  14.9109      0.00     0.01       0.00     0.14
 61  14.9110      0.00    -0.03       0.00     0.07
 62  15.0670      0.00     0.07       0.00     0.02
 63  16.0198      0.00    -0.07       0.00     0.05
 64  16.0198      0.00    -0.09       0.00     0.14
 65  16.0198      0.00     0.04       0.00     0.08
 66  16.0198      0.00     0.03       0.00    -0.16
 67  16.0198      0.00     0.12       0.00    -0.20
 68  16.0199      0.00    -0.04       0.00     0.02
 69  16.0199      0.00     0.04       0.00    -0.24
 70  16.1099      0.00    -0.18       0.00     0.01
 71  16.1614      0.00    -0.05       0.00     0.36
 72  16.1892      0.00     0.07       0.00    -0.22
 73  16.3968      0.00     0.29       0.00    -0.01

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.

01RU143    quality flag:3

Type:           3:2E      3:2E      3:2E

axisobj        39.688    39.688    39.688
ecceobj         0.143     0.143     0.143
incobj          6.487     6.487     6.487
qmin           32.827    32.827    32.828
qmax           46.546    46.546    46.547
amean          39.458    39.458    39.458
amin           39.064    39.064    39.064
amax           39.902    39.902    39.901
emean           0.149     0.149     0.149
emin            0.130     0.130     0.130
emax            0.167     0.167     0.167
imean           7.904     7.904     7.904
imin            6.969     6.969     6.969
imax            8.706     8.706     8.706
excite_mean     0.203     0.203     0.203
fracstop        1.000     1.000     1.000
cjmean          3.005     3.005     3.005

libcent 0       180.6     180.7     180.4
libamp  0        67.3      67.3      67.2
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       183.7     183.7     183.7
kozaiamp        180.0     180.0     180.0