Orbit Fit and Astrometric record for 14UW228

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: 14UW228   
# Created Sat Dec  4 02:12:52 2021
# Orbit generated from Bernstein formalism
# Fitting     46 observations of     49
# Arc:   4.06y
# First observation: 2013/08/09
#  Last observation: 2017/08/30
Preliminary a, adot, b, bdot, g, gdot:
  -0.000031   0.033019   0.000001  -0.001515   0.029854   0.000000
# Chi-squared of fit:    13.92 DOF:     86 RMS:  0.10
# Min/Max residuals:    -0.19    0.22
# Exact a, adot, b, bdot, g, gdot:
  1.821964E-05  3.283946E-02 -1.498789E-06 -1.512374E-03  2.975341E-02  4.542470E-03
# Covariance matrix:
  1.4791E-13 -7.1569E-14 -1.6065E-15  1.0014E-15  4.1972E-14 -3.1389E-13
 -7.1569E-14  1.5112E-13  1.4826E-15 -5.3928E-15  7.7259E-14  1.3673E-12
 -1.6065E-15  1.4826E-15  1.0384E-13 -5.5026E-14 -7.3557E-16  2.2059E-14
  1.0014E-15 -5.3928E-15 -5.5026E-14  4.2037E-14 -3.5757E-15 -6.7893E-14
  4.1972E-14  7.7259E-14 -7.3557E-16 -3.5757E-15  1.2393E-13  8.2910E-13
 -3.1389E-13  1.3673E-12  2.2059E-14 -6.7893E-14  8.2910E-13  1.7366E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
    3.871090   28.700740    0.965377    0.021326   -0.314666  2456514.016098
# Heliocentric elements and errors
Epoch:              2456510.5000  =  2013/08/06
Mean Anomaly:           50.37585 +/-     0.015
Argument of Peri:       60.23963 +/-     0.027
Long of Asc Node:      263.90544 +/-     0.004
Inclination:             4.57660 +/-     0.000
Eccentricity:         0.12776347 +/-    0.0001
Semi-Major Axis:     36.51422724 +/-    0.0020
Time of Perihelion: 2445233.0345 +/-       3.3
Perihelion:          31.84904288 +/-    0.0048
Aphelion:            41.17941160 +/-    0.0050
Period (y)              220.6487 +/-      0.02
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           30.15291648 +/-    0.0003
Ecliptic Y           15.41140283 +/-    0.0002
Ecliptic Z            2.26903576 +/-    0.0000
Ecliptic XDOT        -0.00108336 +/-    0.0000
Ecliptic YDOT         0.00285446 +/-    0.0000
Ecliptic ZDOT        -0.00011049 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   33.93903700 +/-    0.0003
Geocenter to KBO     33.60959274 +/-    0.0004
# Hcoef:  9.09

The following table shows the complete astrometric record for 14UW228. 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 (14UW228) followed by the observatory code and reference code for the source of the astrometry.

2013 08  09.51532  01 41 00.060  +14 37 38.52  24.2r 14UW228   568  C~2SDh      
2013 08  09.55803  01 41 00.019  +14 37 38.39  24.6r 14UW228   568  C~2SDh      
2013 09  02.48002  01 40 04.225  +14 34 39.33  24.5r 14UW228   568  C~2SDh      
2013 09  03.45599  01 40 00.793  +14 34 24.46  25.2r 14UW228   568  C~2SDh      
2013 09  03.50258  01 40 00.643  +14 34 23.78  25.3r 14UW228   568  C~2SDh      
2013 10  08.51708  01 37 14.386  +14 20 24.55  23.6r 14UW228   568  C~2SDh      
2013 11  01.51045  01 34 59.242  +14 07 12.82  24.1r 14UW228   568  C~2SDh      
2013 11  28.28696  01 32 49.665  +13 52 54.75  24.5r 14UW228   568  C~2SDh      
2013 12  04.39432  01 32 27.102  +13 50 07.02  24.8r 14UW228   568  C~2SDh      
2013 12  05.28909  01 32 24.058  +13 49 43.52  23.4r 14UW228   568  C~2SDh      
2013 12  29.25967  01 31 33.227  +13 41 51.38  24.9r 14UW228   568  C~2SDh      
2013 12  30.36406  01 31 32.409  +13 41 38.22  23.7r 14UW228   568  C~2SDh      
2014 01  02.24156  01 31 30.937  +13 41 05.38  24.5r 14UW228   568  C~2SDh      
2014 07  26.53369  01 48 24.104  +15 11 36.83  24.6r 14UW228   568  C~2SDh      
2014 07  26.57688  01 48 24.129  +15 11 37.25  24.5r 14UW228   568  C~2SDh      
2014 08  24.47423  01 47 57.947  +15 12 06.08  24.7r 14UW228   568  C~2SDh      
2014 08  24.54416  01 47 57.773  +15 12 05.59  24.2r 14UW228   568  C~2SDh      
2014 08  27.56009  01 47 49.963  +15 11 38.93  25.7u 14UW228   568  C~2SDh      
2014 08  27.56435  01 47 49.921  +15 11 38.53  25.7u 14UW228   568  C~2SDh      
2014 08  27.57287  01 47 49.904  +15 11 38.36  25.3u 14UW228   568  C~2SDh      
2014 08  30.55610  01 47 41.301  +15 11 06.29  24.4r 14UW228   568  C~2SDh      
2014 09  18.47464  01 46 28.829  +15 05 46.19  24.4r 14UW228   568  C~2SDh      
2014 09  18.51737  01 46 28.630  +15 05 45.10  25.1r 14UW228   568  C~2SDh      
2014 09  23.51567  01 46 05.039  +15 03 49.88  24.9r 14UW228   568  C~2SDh      
2014 10  22.29873  01 43 28.718  +14 49 49.04  24.6r 14UW228   568  C~2SDh      
2014 10  22.34444  01 43 28.457  +14 49 47.52  24.1r 14UW228   568  C~2SDh      
2014 10  22.38820  01 43 28.193  +14 49 46.25  24.4r 14UW228   568  C~2SDh      
2014 10  23.48652  01 43 21.930  +14 49 10.05  24.6r 14UW228   568  C~2SDh      
2014 10  25.50246  01 43 10.431  +14 48 03.42  24.4r 14UW228   568  C~2SDh      
2014 11  20.37417  01 40 52.886  +14 33 52.98  25.0r 14UW228   568  C~2SDh      
2014 11  21.26474  01 40 48.738  +14 33 25.27  24.2r 14UW228   568  C~2SDh      
2014 11  21.27445  01 40 48.671  +14 33 25.22  24.8r 14UW228   568  C~2SDh      
2014 11  21.42970  01 40 47.944  +14 33 20.26  24.7r 14UW228   568  C~2SDh      
2015 02  19.25614  01 40 34.416  +14 21 02.26  24.2r 14UW228   568  C~2SDh      
2015 10  10.36050  01 52 07.112  +15 31 32.07  24.1r 14UW228   568  C~2SDh      
2015 10  10.42692  01 52 06.741  +15 31 30.17  24.5r 14UW228   568  C~2SDh      
2015 10  13.35876  01 51 50.411  +15 30 03.17        14UW228   568  C~2SDh      
2015 10  13.42514  01 51 50.037  +15 30 01.25        14UW228   568  C~2SDh      
2015 10  14.31603  01 51 45.023  +15 29 34.30  24.9r 14UW228   568  C~2SDh      
2015 10  14.38671  01 51 44.627  +15 29 32.19        14UW228   568  C~2SDh      
2015 10  14.39084  01 51 44.596  +15 29 32.33        14UW228   568  C~2SDh      
2015 10  14.47894  01 51 44.118  +15 29 29.43        14UW228   568  C~2SDh      
2015 10  14.54658  01 51 43.708  +15 29 27.46        14UW228   568  C~2SDh      
2015 12  06.20482  01 47 13.246  +15 02 04.67  24.3r 14UW228   568  C~2SDh      
2015 12  06.27161  01 47 12.978  +15 02 02.95  24.3r 14UW228   568  C~2SDh      
2015 12  07.40784  01 47 08.855  +15 01 33.27  24.9w 14UW228   568  C~2SDi      
2015 12  31.32052  01 46 12.069  +14 53 30.50  24.6w 14UW228   568  C~2SDi      
2016 01  07.29206  01 46 07.310  +14 52 09.14  24.7w 14UW228   568  C~2SDi      
2017 08  30.58559  02 09 50.636  +16 50 45.52  25.6w 14UW228   568  C~2SDi      

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    -0.16       0.00     0.14
     2   0.0001     -0.60    -0.07       0.09    -0.04
     3   0.0656   -820.50    -0.08     125.54     0.11
     4   0.0683   -872.33    -0.13     129.69    -0.07
     5   0.0684   -874.61     0.16     129.84    -0.15
     6   0.1643  -3429.72     0.10     224.53    -0.17
     7   0.2300  -5549.13    -0.14     205.89    -0.10
     8   0.3033  -7620.56    -0.08     101.40     0.13
     9   0.3200  -7988.38 (   0.46)     66.71 (   0.04)
    10   0.3224  -8038.33     0.05      61.24    -0.03
    11   0.3881  -8902.42    -0.01    -103.91     0.06
    12   0.3911  -8918.40 (   0.43)   -111.74 (   0.57)
    13   0.3990  -8950.54     0.16    -134.33     0.01
    14   0.9610   6742.41     0.09    -392.05    -0.01
    15   0.9612   6742.89     0.07    -391.79    -0.02
    16   1.0403   6398.13     0.05    -230.92    -0.03
    17   1.0405   6395.60     0.12    -230.49     0.00
    18   1.0487   6280.31 (   0.40)   -215.47 (   0.26)
    19   1.0487   6279.60    -0.13    -215.63     0.08
    20   1.0488   6279.31    -0.06    -215.70    -0.04
    21   1.0569   6151.36    -0.02    -201.67     0.00
    22   1.1087   5055.85     0.02    -129.27     0.14
    23   1.1088   5052.77    -0.03    -129.27    -0.01
    24   1.1225   4692.24     0.02    -115.65     0.06
    25   1.2013   2275.15     0.11     -93.17     0.01
    26   1.2014   2271.07     0.15     -93.23    -0.04
    27   1.2016   2267.04     0.08     -93.05     0.15
    28   1.2046   2169.27     0.19     -94.32    -0.03
    29   1.2101   1989.70    -0.07     -96.79    -0.02
    30   1.2809   -178.47    -0.10    -172.80    -0.12
    31   1.2834   -244.63     0.08    -176.92    -0.19
    32   1.2834   -245.56    -0.11    -176.62     0.15
    33   1.2838   -257.19    -0.02    -177.44    -0.04
    34   1.5297   -706.81    -0.01    -794.78     0.16
    35   2.1680  10188.22    -0.03    -404.55    -0.03
    36   2.1681  10182.52     0.02    -404.46    -0.01
    37   2.1762   9930.37    -0.02    -403.61    -0.12
    38   2.1763   9924.62     0.07    -403.53    -0.08
    39   2.1788   9847.12    -0.19    -403.47    -0.05
    40   2.1790   9841.01    -0.07    -403.45    -0.07
    41   2.1790   9840.63    -0.08    -403.16     0.21
    42   2.1792   9833.13     0.22    -403.47    -0.15
    43   2.1794   9826.87    -0.05    -403.24     0.05
    44   2.3236   5579.26     0.10    -564.62    -0.01
    45   2.3238   5575.02    -0.10    -564.86     0.10
    46   2.3269   5508.60     0.00    -571.46     0.08
    47   2.3923   4567.39    -0.03    -730.97     0.15
    48   2.4114   4473.95    -0.10    -782.53    -0.10
    49   4.0577  26346.31     0.02   -1128.77    -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.

14UW228    quality flag:3

Type:           4:3E      4:3E      4:3E

axisobj        36.701    36.708    36.695
ecceobj         0.133     0.133     0.132
incobj          4.580     4.580     4.580
qmin           30.775    30.757    30.799
qmax           42.458    42.446    42.459
amean          36.477    36.477    36.478
amin           36.192    36.194    36.183
amax           36.788    36.794    36.804
emean           0.130     0.130     0.129
emin            0.107     0.106     0.106
emax            0.155     0.155     0.154
imean           7.279     7.247     7.317
imin            4.743     4.716     4.783
imax            8.934     8.905     8.975
excite_mean     0.182     0.182     0.182
fracstop        1.000     1.000     1.000
cjmean          2.989     2.989     2.989

libcent 0       180.0     180.5     179.1
libamp  0        23.8      20.5      26.8
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       181.1     181.2     181.1
kozaiamp        180.0     180.0     180.0