Orbit Fit and Astrometric record for 15TW361

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: 15TW361   
# Created Sat Nov 27 02:13:39 2021
# Orbit generated from Bernstein formalism
# Fitting     54 observations of     54
# Arc:   3.95y
# First observation: 2013/10/04
#  Last observation: 2017/09/14
Preliminary a, adot, b, bdot, g, gdot:
  -0.000155   0.033851  -0.000005   0.008912   0.027564   0.000000
# Chi-squared of fit:    14.68 DOF:    102 RMS:  0.09
# Min/Max residuals:    -0.30    0.31
# Exact a, adot, b, bdot, g, gdot:
  1.977619E-05  3.384180E-02  5.141683E-06  8.925570E-03  2.788794E-02  4.928846E-06
# Covariance matrix:
  1.8768E-13 -1.2283E-13  1.2412E-14 -1.9889E-14  1.8543E-15 -5.3703E-13
 -1.2283E-13  2.0925E-13 -3.5048E-14  5.3946E-14  1.7531E-13  1.4745E-12
  1.2412E-14 -3.5048E-14  1.3397E-13 -5.2803E-14 -3.8628E-14 -2.7749E-13
 -1.9889E-14  5.3946E-14 -5.2803E-14  3.3703E-14  5.7244E-14  4.2472E-13
  1.8543E-15  1.7531E-13 -3.8628E-14  5.7244E-14  3.7368E-13  1.5833E-12
 -5.3703E-13  1.4745E-12 -2.7749E-13  4.2472E-13  1.5833E-12  1.1629E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -8.088950   14.855501    0.071452   -0.140297   -0.987890  2456569.662398
# Heliocentric elements and errors
Epoch:              2456560.5000  =  2013/09/25
Mean Anomaly:          359.84174 +/-     0.006
Argument of Peri:      331.94501 +/-     0.017
Long of Asc Node:       42.23173 +/-     0.000
Inclination:            16.67487 +/-     0.000
Eccentricity:         0.47010220 +/-    0.0001
Semi-Major Axis:     69.53387204 +/-    0.0115
Time of Perihelion: 2456653.6002 +/-       3.3
Perihelion:          36.84584592 +/-    0.0081
Aphelion:           102.22189817 +/-    0.0177
Period (y)              579.8329 +/-      0.14
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           35.29661131 +/-    0.0008
Ecliptic Y            9.29172172 +/-    0.0002
Ecliptic Z           -5.04540375 +/-    0.0001
Ecliptic XDOT        -0.00073832 +/-    0.0000
Ecliptic YDOT         0.00324168 +/-    0.0000
Ecliptic ZDOT         0.00086761 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   36.84620688 +/-    0.0007
Geocenter to KBO     35.85779857 +/-    0.0008
# Hcoef:  7.22

The following table shows the complete astrometric record for 15TW361. 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 (15TW361) followed by the observatory code and reference code for the source of the astrometry.

2013 10  04.16162  01 07 11.133  -01 36 43.17  23.7g 15TW361   W84  C~4yYX      
2013 10  04.16162  01 07 11.14   -01 36 43.2   23.9g 15TW361   W84  C~3cu2      
2013 10  11.23671  01 06 35.410  -01 39 46.64  23.2g 15TW361   W84  C~4yYX      
2013 10  11.23671  01 06 35.41   -01 39 46.7   23.3g 15TW361   W84  C~3cu2      
2013 10  11.24748  01 06 35.351  -01 39 46.97  22.9r 15TW361   W84  C~4yYX      
2013 10  11.24748  01 06 35.35   -01 39 47.0   22.9r 15TW361   W84  C~3cu2      
2014 10  21.25380  01 12 08.228  -00 30 38.58  23.5g 15TW361   W84  C~4yYX      
2014 10  21.25380  01 12 08.23   -00 30 38.6   23.6g 15TW361   W84  C~3cu2      
2014 10  28.23905  01 11 33.703  -00 33 07.49  22.6r 15TW361   W84  C~4yYX      
2014 10  28.23905  01 11 33.70   -00 33 07.5   22.7r 15TW361   W84  C~3cu2      
2014 11  15.09832  01 10 13.474  -00 37 49.08  23.1r 15TW361   W84  C~4yYX      
2014 11  15.09832  01 10 13.47   -00 37 49.1   23.1r 15TW361   W84  C~3cu2      
2014 11  17.112940 01 10 05.45   -00 38 10.2   22.2z 15TW361   W84  C~352l      
2014 11  17.11347  01 10 05.456  -00 38 10.48  22.6z 15TW361   W84  C~4yYX      
2014 11  28.11599  01 09 26.602  -00 39 24.03  22.6z 15TW361   W84  C~4yYX      
2015 10  10.309081 01 19 26.359  +00 46 51.17  22.6r 15TW361   568  C~2TuU      
2015 10  10.380358 01 19 25.989  +00 46 49.33  22.7r 15TW361   568  C~2TuU      
2015 10  10.410464 01 19 25.836  +00 46 48.55  22.6r 15TW361   568  C~2TuU      
2015 10  14.326097 01 19 05.950  +00 45 09.82  23.2g 15TW361   568  C~2TuU      
2015 10  14.358183 01 19 05.782  +00 45 09.03  23.1g 15TW361   568  C~2TuU      
2015 10  14.360299 01 19 05.771  +00 45 08.99  23.3g 15TW361   568  C~2TuU      
2015 10  14.390207 01 19 05.617  +00 45 08.25  23.3g 15TW361   568  C~2TuU      
2015 10  14.400988 01 19 05.562  +00 45 07.93  23.3g 15TW361   568  C~2TuU      
2015 11  02.118345 01 17 32.28   +00 38 14.9   22.8r 15TW361   W84  C~352l      
2015 11  02.11888  01 17 32.284  +00 38 14.69  22.8r 15TW361   W84  C~4yYX      
2016 08  16.38438  01 29 17.093  +02 20 45.50  22.1z 15TW361   W84  C~4yYX      
2016 08  16.38438  01 29 17.09   +02 20 45.5   22.1z 15TW361   W84  C~3cu2      
2016 08  16.38576  01 29 17.082  +02 20 45.60  22.9i 15TW361   W84  C~4yYX      
2016 08  16.38576  01 29 17.08   +02 20 45.6   22.9i 15TW361   W84  C~3cu2      
2016 08  31.35686  01 28 37.847  +02 16 00.55  23.2g 15TW361   W84  C~4yYX      
2016 08  31.35686  01 28 37.84   +02 16 00.6   24.0g 15TW361   W84  C~3cu2      
2016 10  23.22246  01 24 37.802  +01 54 09.79  22.8r 15TW361   W84  C~4yYX      
2016 10  23.22246  01 24 37.80   +01 54 09.8   22.9r 15TW361   W84  C~3cu2      
2016 10  28.16466  01 24 13.084  +01 52 22.10  22.3i 15TW361   W84  C~4yYX      
2016 10  28.16466  01 24 13.08   +01 52 22.1   22.4i 15TW361   W84  C~3cu2      
2016 10  28.16604  01 24 13.067  +01 52 21.85  23.7g 15TW361   W84  C~4yYX      
2016 11  05.144630 01 23 34.45   +01 49 46.3   22.7i 15TW361   W84  C~352l      
2016 11  05.14516  01 23 34.448  +01 49 46.26  22.7i 15TW361   W84  C~4yYX      
2016 11  05.14516  01 23 34.45   +01 49 46.3   22.7i 15TW361   W84  C~3cu2      
2016 11  05.146019 01 23 34.44   +01 49 46.3   23.4g 15TW361   W84  C~352l      
2016 11  05.14655  01 23 34.441  +01 49 46.24  23.3g 15TW361   W84  C~4yYX      
2016 11  05.14655  01 23 34.44   +01 49 46.3   23.4g 15TW361   W84  C~3cu2      
2016 11  05.18795  01 23 34.244  +01 49 45.56  22.4z 15TW361   W84  C~4yYX      
2016 11  05.18795  01 23 34.24   +01 49 45.6   22.6z 15TW361   W84  C~3cu2      
2017 08  27.374329 01 35 08.01   +03 29 20.1   22.5i 15TW361   W84  C~352l      
2017 08  27.37486  01 35 08.012  +03 29 20.04  22.4i 15TW361   W84  C~4yYX      
2017 08  27.388160 01 35 07.97   +03 29 19.8   22.9r 15TW361   W84  C~352l      
2017 08  27.38869  01 35 07.968  +03 29 19.75  22.9r 15TW361   W84  C~4yYX      
2017 08  27.389549 01 35 07.96   +03 29 19.7   23.9g 15TW361   W84  C~352l      
2017 08  27.39008  01 35 07.966  +03 29 19.68  23.6g 15TW361   W84  C~4yYX      
2017 08  28.339861 01 35 05.30   +03 29 01.7   22.8z 15TW361   W84  C~352l      
2017 08  28.34038  01 35 05.298  +03 29 01.74  22.6z 15TW361   W84  C~4yYX      
2017 09  14.302106 01 34 06.25   +03 22 54.0   22.3z 15TW361   W84  C~352l      
2017 09  14.30264  01 34 06.248  +03 22 53.98  22.2z 15TW361   W84  C~4yYX      

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    -0.12       0.00    -0.02
     2   0.0000      0.09    -0.04      -0.07    -0.08
     3   0.0194   -564.99     0.10      36.64     0.04
     4   0.0194   -565.01     0.08      36.59    -0.02
     5   0.0194   -565.96     0.00      36.66    -0.02
     6   0.0194   -565.94     0.03      36.68     0.00
     7   1.0461   5639.76     0.07    1945.04    -0.01
     8   1.0461   5639.78     0.09    1945.01    -0.04
     9   1.0652   5104.07    -0.06    2006.94    -0.09
    10   1.0652   5104.12    -0.01    2006.93    -0.10
    11   1.1141   3884.39    -0.04    2210.18    -0.03
    12   1.1141   3884.45     0.03    2210.17    -0.03
    13   1.1196   3765.20     0.00    2237.00     0.17
    14   1.1196   3765.17     0.01    2236.70    -0.13
    15   1.1498   3198.80    -0.20    2393.08    -0.30
    16   2.0155  13514.47     0.03    3710.73     0.14
    17   2.0157  13508.62    -0.02    3711.16     0.14
    18   2.0157  13506.19     0.01    3711.32     0.12
    19   2.0265  13191.56     0.01    3734.91     0.11
    20   2.0265  13188.92    -0.02    3735.15     0.13
    21   2.0266  13188.75    -0.01    3735.17     0.14
    22   2.0266  13186.32     0.00    3735.38     0.13
    23   2.0267  13185.43    -0.01    3735.40     0.08
    24   2.0779  11729.68     0.10    3892.39     0.31
    25   2.0779  11729.66     0.12    3892.17     0.09
    26   2.8671  23949.49    -0.07    5524.13    -0.17
    27   2.8671  23949.54    -0.03    5524.11    -0.19
    28   2.8671  23949.39    -0.13    5524.28    -0.02
    29   2.8671  23949.42    -0.10    5524.27    -0.03
    30   2.9081  23288.07     0.08    5485.77    -0.02
    31   2.9081  23288.15     0.16    5485.68    -0.10
    32   3.0529  19420.17    -0.19    5654.14    -0.04
    33   3.0529  19420.20    -0.16    5654.12    -0.06
    34   3.0664  19033.23     0.08    5696.92    -0.05
    35   3.0664  19033.29     0.14    5696.90    -0.08
    36   3.0664  19032.95    -0.09    5696.77    -0.22
    37   3.0882  18433.66    -0.01    5775.41     0.03
    38   3.0883  18433.66     0.03    5775.41     0.02
    39   3.0883  18433.62    -0.01    5775.39    -0.00
    40   3.0883  18433.53    -0.04    5775.47     0.07
    41   3.0883  18433.53    -0.00    5775.47     0.06
    42   3.0883  18433.52    -0.01    5775.41     0.00
    43   3.0884  18430.46    -0.01    5775.97     0.11
    44   3.0884  18430.50     0.03    5775.91     0.05
    45   3.8965  30501.74     0.02    7339.02     0.08
    46   3.8965  30501.75     0.05    7338.95     0.01
    47   3.8966  30501.06    -0.00    7338.97     0.04
    48   3.8966  30501.01    -0.02    7338.94     0.01
    49   3.8966  30500.88    -0.12    7338.94     0.01
    50   3.8966  30500.95    -0.01    7338.88    -0.05
    51   3.8992  30456.21    -0.01    7337.42    -0.05
    52   3.8992  30456.20     0.00    7337.47    -0.01
    53   3.9456  29477.82     0.13    7333.76    -0.05
    54   3.9456  29477.78     0.13    7333.75    -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.

15TW361    quality flag:3

Type:       7:2EEEEE  7:2EEEEE  7:2EEEEE

axisobj        70.306    70.339    70.275
ecceobj         0.476     0.476     0.476
incobj         16.659    16.659    16.660
qmin           36.079    36.053    36.089
qmax          104.858   104.716   104.792
amean          69.409    69.409    69.409
amin           68.380    68.362    68.375
amax           70.813    70.795    70.812
emean           0.463     0.462     0.463
emin            0.443     0.442     0.445
emax            0.481     0.480     0.481
imean          16.695    16.692    16.653
imin           15.724    15.714    15.742
imax           17.816    17.977    17.540
excite_mean     0.545     0.545     0.545
fracstop        1.000     1.000     1.000
cjmean          3.012     3.012     3.012

libcent 0       179.6     180.1     179.8
libamp  0       115.3     112.4     120.8
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       117.3     117.6     117.5
kozaiamp        180.0     180.0     180.0