Orbit Fit and Astrometric record for 00WT169

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: 00WT169   
# Created Fri Jun  5 01:08:31 2020
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   71 observations of   71
# Arc:  19.15y
# First observation: 2000/11/23
#  Last observation: 2020/01/18
# Chi-squared of fit:   248.83 DOF:  136 RMS:  0.33
# Min/Max residuals:    -1.39    0.69
# Exact a, adot, b, bdot, g, gdot:
  1.638804E-05  2.136925E-02  3.527545E-06  4.824361E-04  2.277628E-02  2.944357E-04
# Covariance matrix:
  1.0024E-13 -1.5615E-14  2.0116E-16 -2.4711E-16  3.0681E-14 -3.1925E-14
 -1.5615E-14  6.6875E-15 -2.6047E-16  1.4548E-16  1.1867E-15  1.8254E-14
  2.0116E-16 -2.6047E-16  6.5077E-14 -5.1318E-15 -5.2088E-16 -7.7111E-16
 -2.4711E-16  1.4548E-16 -5.1318E-15  5.8789E-16  3.3877E-17  4.3502E-16
  3.0681E-14  1.1867E-15 -5.2088E-16  3.3877E-17  6.2643E-14  2.4956E-15
 -3.1925E-14  1.8254E-14 -7.7111E-16  4.3502E-16  2.4956E-15  5.4612E-14
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.199993   68.368863    0.116004   -0.020552   -0.973776  2451871.955873
# Heliocentric elements and errors
Epoch:              2451872.5000  =  2000/11/24
Mean Anomaly:           52.78325 +/-     0.102
Argument of Peri:      263.58064 +/-     0.105
Long of Asc Node:      110.51349 +/-     0.001
Inclination:             1.74365 +/-     0.000
Eccentricity:         0.01440898 +/-    0.0000
Semi-Major Axis:     45.27405361 +/-    0.0020
Time of Perihelion: 2435558.2862 +/-      31.5
Perihelion:          44.62170054 +/-    0.0022
Aphelion:            45.92640667 +/-    0.0023
Period (y)              304.6367 +/-      0.02
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           16.65241364 +/-    0.0002
Ecliptic Y           41.67206754 +/-    0.0004
Ecliptic Z           -0.91933071 +/-    0.0000
Ecliptic XDOT        -0.00238221 +/-    0.0000
Ecliptic YDOT         0.00098536 +/-    0.0000
Ecliptic ZDOT         0.00005741 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   44.88550528 +/-    0.0004
Geocenter to KBO     43.90535871 +/-    0.0005
# Hcoef:  6.11

The following table shows the complete astrometric record for 00WT169. 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 (00WT169) followed by the observatory code and reference code for the source of the astrometry.

2000 11  23.45513  04 27 18.50   +20 30 57.6         00WT169   568  Cc3044      
2000 11  23.47774  04 27 18.42   +20 30 57.5         00WT169   568  Cc3044      
2000 11  23.50024  04 27 18.30   +20 30 57.2         00WT169   568  Cc3044      
2000 11  29.48449  04 26 48.99   +20 29 53.2   21.9R 00WT169   568  Cc3044      
2000 11  29.50227  04 26 48.88   +20 29 52.8   22.0R 00WT169   568  Cc3044      
2000 12  17.46296  04 25 22.31   +20 26 47.5   22.0R 00WT169   568  Cc4033      
2000 12  17.47846  04 25 22.24   +20 26 47.3   22.1R 00WT169   568  Cc4033      
2001 01  25.13017  04 23 02.56   +20 22 17.3   22.7R 00WT169   695  Cc6724      
2001 01  25.22623  04 23 02.33   +20 22 16.9         00WT169   695  Cc6724      
2001 02  16.89482  04 22 35.05   +20 21 54.9         00WT169   950  Cc6724      
2001 02  18.97751  04 22 34.96   +20 21 58.6         00WT169   950  Cc6724      
2001 02  20.26288  04 22 35.22   +20 22 00.5   22.6R 00WT169   568  Cc6724      
2001 02  21.23176  04 22 35.44   +20 22 02.9   22.7R 00WT169   568  Cc6724      
2002 01  09.35957  04 28 56.91   +20 36 52.5   22.3R 00WT169   568  Ce6590      
2002 01  09.39748  04 28 56.76   +20 36 51.8   22.2R 00WT169   568  Ce6590      
2002 01  14.20980  04 28 40.38   +20 36 22.6   22.5R 00WT169   568  Ce6590      
2002 01  14.22422  04 28 40.33   +20 36 22.5   22.4R 00WT169   568  Ce6590      
2002 01  14.23044  04 28 40.31   +20 36 22.5   22.3R 00WT169   568  Ce6590      
2002 11  06.52312  04 38 59.94   +20 58 51.4   22.0R 00WT169   568  Cl8320      
2002 11  06.56643  04 38 59.76   +20 58 51.1         00WT169   568  Cl8320      
2005 03  09.14215  04 43 01.31   +21 12 01.6         00WT169   G96  Cn1549      
2005 03  11.14357  04 43 04.33   +21 12 11.2         00WT169   G96  Cn1549      
2006 01  31.242897 04 48 24.96   +21 22 21.2   22.6V 00WT169   645  C~2GiT      
2006 01  31.243726 04 48 24.96   +21 22 21.4   22.0V 00WT169   645  C~2GiT      
2006 01  31.246214 04 48 24.97   +21 22 21.2   24.0V 00WT169   645  C~2GiT      
2008 09  24.39129  05 11 46.77   +22 01 13.7   23.6R 00WT169   250  S~06AO      
2008 09  24.39754  05 11 46.77   +22 01 13.6         00WT169   250  S~06AO      
2008 09  24.40449  05 11 46.76   +22 01 13.6         00WT169   250  S~06AO      
2008 09  24.41074  05 11 46.76   +22 01 13.6         00WT169   250  S~06AO      
2008 12  01.45455  05 08 10.56   +21 56 16.7   22.0R 00WT169   688  C~02MI      
2008 12  01.49965  05 08 10.33   +21 56 16.1         00WT169   688  C~02MI      
2010 01  27.46752  05 09 12.45   +22 00 08.1         00WT169   250  S~0M3F      
2010 01  27.46991  05 09 12.44   +22 00 08.0         00WT169   250  S~0M3F      
2010 01  27.47272  05 09 12.43   +22 00 08.0         00WT169   250  S~0M3F      
2010 01  27.47510  05 09 12.43   +22 00 08.1         00WT169   250  S~0M3F      
2010 01  27.48019  05 09 12.35   +22 00 08.0         00WT169   250  S~0M3F      
2010 01  27.48574  05 09 12.33   +22 00 08.0         00WT169   250  S~0M3F      
2010 01  27.49190  05 09 12.30   +22 00 07.9         00WT169   250  S~0M3F      
2010 01  27.49745  05 09 12.28   +22 00 07.9         00WT169   250  S~0M3F      
2010 11  27.54424  05 18 59.651  +22 12 09.77  22.9G 00WT169   F51  C~36iS      
2012 11  06.60489  05 30 57.655  +22 26 13.48  23.0G 00WT169   F51  C~36iS      
2012 11  25.36090  05 29 37.898  +22 25 11.96  22.4G 00WT169   F51  C~36iS      
2012 11  25.37285  05 29 37.856  +22 25 12.16  22.7G 00WT169   F51  C~36iS      
2013 04  04.26103  05 24 33.213  +22 23 18.63  22.7G 00WT169   F51  C~36iS      
2013 11  27.36780  05 34 45.444  +22 30 36.37  22.2G 00WT169   F51  C~36iS      
2013 11  27.38303  05 34 45.370  +22 30 36.44  22.1G 00WT169   F51  C~36iS      
2013 11  27.39827  05 34 45.291  +22 30 36.40  22.7G 00WT169   F51  C~36iS      
2013 11  27.41363  05 34 45.218  +22 30 36.28  22.5G 00WT169   F51  C~36iS      
2014 02  24.29328  05 29 02.223  +22 27 53.86  22.4G 00WT169   F51  C~36iS      
2014 02  24.30582  05 29 02.210  +22 27 53.84  22.0G 00WT169   F51  C~36iS      
2014 02  24.31834  05 29 02.183  +22 27 53.86  22.1G 00WT169   F51  C~36iS      
2014 02  24.33094  05 29 02.177  +22 27 53.98  22.3G 00WT169   F51  C~36iS      
2014 11  26.35138  05 40 07.163  +22 35 31.07  22.5G 00WT169   F51  C~36iS      
2014 11  26.36331  05 40 07.147  +22 35 31.61  22.7G 00WT169   F51  C~36iS      
2014 11  26.37527  05 40 07.050  +22 35 31.14  23.0G 00WT169   F51  C~36iS      
2014 11  26.38724  05 40 07.000  +22 35 30.71  22.7G 00WT169   F51  C~36iS      
2015 01  18.23809  05 35 53.918  +22 33 40.40  23.1G 00WT169   F51  C~36iS      
2015 01  18.25206  05 35 53.863  +22 33 40.61  22.7G 00WT169   F51  C~36iS      
2015 01  18.26598  05 35 53.787  +22 33 40.49  22.8G 00WT169   F51  C~36iS      
2015 01  18.27998  05 35 53.714  +22 33 40.48  21.8G 00WT169   F51  C~36iS      
2015 12  09.50714  05 44 20.867  +22 39 21.29  22.4G 00WT169   F51  C~36iS      
2015 12  09.52098  05 44 20.793  +22 39 21.25  22.4G 00WT169   F51  C~36iS      
2015 12  09.53485  05 44 20.732  +22 39 21.14  22.1G 00WT169   F51  C~36iS      
2015 12  09.54873  05 44 20.652  +22 39 21.14  22.1G 00WT169   F51  C~36iS      
2016 01  14.40475  05 41 26.078  +22 38 27.18  21.6G 00WT169   F51  C~36iS      
2016 01  14.41867  05 41 26.025  +22 38 27.14  22.5G 00WT169   F51  C~36iS      
2016 01  14.43258  05 41 25.964  +22 38 27.21  22.3G 00WT169   F51  C~36iS      
2016 01  14.44647  05 41 25.896  +22 38 26.95  22.4G 00WT169   F51  C~36iS      
2016 01  26.40002  05 40 37.736  +22 38 15.97  22.5G 00WT169   F51  C~36iS      
2020 01  18.310600 06 02 07.551  +22 50 45.26  22.5G 00WT169   G37  C~3iAq      
2020 01  18.342280 06 02 07.372  +22 50 45.61        00WT169   G37  C~3iAq      

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    -0.70
  2   0.0001      0.00     0.25       0.00    -0.56
  3   0.0001      0.00     0.12       0.00    -0.61
  4   0.0165      0.00     0.14       0.00    -0.23
  5   0.0166      0.00    -0.18       0.00    -0.43
  6   0.0657      0.00     0.24       0.00    -0.22
  7   0.0658      0.00     0.28       0.00    -0.26
  8   0.1716      0.00    -0.52       0.00     0.52
  9   0.1719      0.00    -0.64       0.00     0.47
 10   0.2339      0.00    -0.46       0.00     0.69
 11   0.2396      0.00    -0.68       0.00     0.60
 12   0.2431      0.00     0.63       0.00    -0.40
 13   0.2458      0.00     0.40       0.00    -0.40
 14   1.1277      0.00     0.46       0.00     0.66
 15   1.1278      0.00     0.29       0.00     0.21
 16   1.1410      0.00     0.27       0.00     0.16
 17   1.1411      0.00     0.24       0.00     0.14
 18   1.1411      0.00     0.24       0.00     0.17
 19   1.9523      0.00    -0.09       0.00     0.00
 20   1.9524      0.00     0.05       0.00     0.09
 21   4.2894      0.00    -1.39       0.00    -0.16
 22   4.2948      0.00    -0.02       0.00     0.54
 23   5.1876      0.00     0.03       0.00     0.11
 24   5.1876      0.00     0.06       0.00     0.31
 25   5.1877      0.00     0.29       0.00     0.11
 26   7.8356      0.00    -0.21       0.00     0.29
 27   7.8356      0.00    -0.16       0.00     0.20
 28   7.8356      0.00    -0.26       0.00     0.21
 29   7.8356      0.00    -0.22       0.00     0.22
 30   8.0219      0.00     0.07       0.00     0.54
 31   8.0220      0.00    -0.01       0.00     0.23
 32   9.1773      0.00     0.43       0.00    -0.31
 33   9.1773      0.00     0.39       0.00    -0.40
 34   9.1773      0.00     0.37       0.00    -0.40
 35   9.1773      0.00     0.47       0.00    -0.29
 36   9.1773      0.00    -0.50       0.00    -0.38
 37   9.1774      0.00    -0.55       0.00    -0.37
 38   9.1774      0.00    -0.72       0.00    -0.45
 39   9.1774      0.00    -0.77       0.00    -0.44
 40  10.0098      0.00     0.40       0.00     0.24
 41  11.9539      0.00    -0.01       0.00     0.19
 42  12.0052      0.00    -0.02       0.00     0.07
 43  12.0053      0.00     0.20       0.00     0.31
 44  12.3609      0.00     0.20       0.00     0.31
 45  13.0100      0.00     0.03       0.00    -0.09
 46  13.0101      0.00     0.01       0.00     0.02
 47  13.0101      0.00    -0.08       0.00     0.02
 48  13.0102      0.00    -0.07       0.00    -0.05
 49  13.2535      0.00     0.28       0.00     0.02
 50  13.2535      0.00     0.28       0.00    -0.00
 51  13.2536      0.00     0.07       0.00     0.01
 52  13.2536      0.00     0.18       0.00     0.13
 53  14.0066      0.00    -0.12       0.00    -0.08
 54  14.0066      0.00     0.48       0.00     0.48
 55  14.0066      0.00    -0.13       0.00     0.04
 56  14.0067      0.00    -0.04       0.00    -0.37
 57  14.1514      0.00     0.23       0.00    -0.10
 58  14.1514      0.00     0.27       0.00     0.12
 59  14.1514      0.00    -0.00       0.00     0.02
 60  14.1515      0.00    -0.22       0.00     0.03
 61  15.0419      0.00    -0.00       0.00    -0.01
 62  15.0419      0.00    -0.06       0.00    -0.03
 63  15.0420      0.00     0.07       0.00    -0.11
 64  15.0420      0.00    -0.08       0.00    -0.09
 65  15.1402      0.00    -0.03       0.00    -0.08
 66  15.1402      0.00     0.11       0.00    -0.11
 67  15.1403      0.00     0.12       0.00    -0.02
 68  15.1403      0.00     0.02       0.00    -0.26
 69  15.1730      0.00     0.00       0.00    -0.07
 70  19.1509      0.00    -0.01       0.00     0.05
 71  19.1510      0.00    -0.57       0.00     0.38

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.

00WT169    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        45.233    45.233    45.233
ecceobj         0.015     0.015     0.015
incobj          1.744     1.744     1.744
qmin           43.575    43.575    43.574
qmax           46.500    46.494    46.504
amean          44.944    44.944    44.944
amin           44.591    44.591    44.591
amax           45.302    45.300    45.303
emean           0.014     0.014     0.014
emin            0.000     0.000     0.000
emax            0.026     0.026     0.027
imean           0.652     0.652     0.652
imin            0.091     0.091     0.091
imax            1.031     1.031     1.031
excite_mean     0.019     0.019     0.019
fracstop        1.000     1.000     1.000
cjmean          3.113     3.113     3.113

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       194.9     194.6     195.1
kozaiamp        179.9     180.0     180.0