Orbit Fit and Astrometric record for 15GO54

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: 15GO54    
# Created Sat Dec  4 02:13:19 2021
# Orbit generated from Bernstein formalism
# Fitting     37 observations of     37
# Arc:   2.35y
# First observation: 2015/02/17
#  Last observation: 2017/06/25
Preliminary a, adot, b, bdot, g, gdot:
  -0.000067   0.026119   0.000017  -0.004679   0.026589   0.000000
# Chi-squared of fit:    14.97 DOF:     68 RMS:  0.11
# Min/Max residuals:    -0.39    0.38
# Exact a, adot, b, bdot, g, gdot:
  1.357623E-05  2.577404E-02 -1.967785E-06 -4.591812E-03  2.639303E-02 -6.804970E-03
# Covariance matrix:
  1.5656E-13 -9.0028E-15  2.9104E-15 -1.2676E-14  1.0713E-13  1.3039E-12
 -9.0028E-15  2.5027E-13  1.5092E-14 -5.8758E-14  1.6747E-13  5.9806E-12
  2.9104E-15  1.5092E-14  9.4749E-14 -6.8798E-14  1.2233E-14  5.3272E-13
 -1.2676E-14 -5.8758E-14 -6.8798E-14  9.4192E-14 -4.9233E-14 -2.0582E-12
  1.0713E-13  1.6747E-13  1.2233E-14 -4.9233E-14  2.2516E-13  5.0275E-12
  1.3039E-12  5.9806E-12  5.3272E-13 -2.0582E-12  5.0275E-12  2.0933E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    1.188613 -153.013542    0.842241    0.010752   -0.511188  2457071.023648
# Heliocentric elements and errors
Epoch:              2457070.5000  =  2015/02/17
Mean Anomaly:          290.40259 +/-     0.057
Argument of Peri:      274.29351 +/-     0.019
Long of Asc Node:       32.26167 +/-     0.000
Inclination:            10.19471 +/-     0.001
Eccentricity:         0.27112066 +/-    0.0005
Semi-Major Axis:     39.32762837 +/-    0.0120
Time of Perihelion: 2474485.9883 +/-      11.9
Perihelion:          28.66509578 +/-    0.0223
Aphelion:            49.99016096 +/-    0.0256
Period (y)              246.6351 +/-      0.11
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -34.59656941 +/-    0.0006
Ecliptic Y          -16.67081760 +/-    0.0003
Ecliptic Z            0.78587620 +/-    0.0000
Ecliptic XDOT         0.00182969 +/-    0.0000
Ecliptic YDOT        -0.00207231 +/-    0.0000
Ecliptic ZDOT        -0.00049077 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   38.41166979 +/-    0.0006
Geocenter to KBO     37.88879123 +/-    0.0007
# Hcoef:  8.57

The following table shows the complete astrometric record for 15GO54. 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 (15GO54) followed by the observatory code and reference code for the source of the astrometry.

2015 02  17.52287  13 41 54.324  -09 17 24.18  22.7r 15GO54    568  C~2lV7      
2015 02  17.56399  13 41 54.214  -09 17 23.45  24.8r 15GO54    568  C~2lV7      
2015 02  20.59770  13 41 47.257  -09 16 46.90  24.4r 15GO54    568  C~2lV7      
2015 03  18.54235  13 40 18.139  -09 08 53.59  24.4r 15GO54    568  C~2lV7      
2015 03  20.54594  13 40 09.423  -09 08 07.34  24.5r 15GO54    568  C~2lV7      
2015 04  11.48071  13 38 24.089  -08 58 51.57  24.3r 15GO54    568  C~2lV7      
2015 04  12.38760  13 38 19.518  -08 58 27.50  24.2r 15GO54    568  C~2lV7      
2015 04  12.43323  13 38 19.274  -08 58 26.38  24.5r 15GO54    568  C~2lV7      
2015 04  12.47547  13 38 19.051  -08 58 25.19  24.7r 15GO54    568  C~2lV7      
2015 04  18.44608  13 37 48.657  -08 55 46.75  24.5r 15GO54    568  C~2lV7      
2015 04  18.49382  13 37 48.431  -08 55 45.79  23.8r 15GO54    568  C~2lV7      
2015 05  17.25497  13 35 30.421  -08 44 04.98  24.2r 15GO54    568  C~2lV7      
2015 05  25.39688  13 34 57.460  -08 41 25.87  24.3r 15GO54    568  C~2lV7      
2015 05  25.45500  13 34 57.231  -08 41 24.83  24.6r 15GO54    568  C~2lV7      
2015 06  21.34643  13 33 41.759  -08 36 01.82  24.4r 15GO54    568  C~2lV7      
2015 06  22.30309  13 33 40.174  -08 35 57.02  24.4r 15GO54    568  C~2lV7      
2015 07  12.29701  13 33 26.530  -08 36 08.67  24.4r 15GO54    568  C~2lV7      
2016 02  04.62644  13 47 28.458  -10 05 37.73  24.6w 15GO54    568  C~2lV7      
2016 02  04.63139  13 47 28.484  -10 05 37.88  24.8w 15GO54    568  C~2lV7      
2016 02  11.60966  13 47 20.788  -10 05 03.58  24.8w 15GO54    568  C~2lV7      
2016 03  11.60894  13 46 01.266  -09 58 21.92  24.7w 15GO54    568  C~2lV7      
2016 04  03.47768  13 44 18.599  -09 49 31.37  24.4w 15GO54    568  C~2lV7      
2016 04  09.45883  13 43 48.567  -09 46 56.66  24.3w 15GO54    568  C~2lV7      
2016 04  09.46692  13 43 48.524  -09 46 56.69  24.6w 15GO54    568  C~2lV7      
2016 05  02.33963  13 41 52.175  -09 37 03.08  24.6w 15GO54    568  C~2lV7      
2016 05  02.35585  13 41 52.088  -09 37 02.52  24.9w 15GO54    568  C~2lV7      
2016 05  07.34298  13 41 27.842  -09 35 01.16  24.3w 15GO54    568  C~2lV7      
2016 05  07.35921  13 41 27.755  -09 35 00.67  24.0w 15GO54    568  C~2lV7      
2016 05  29.33148  13 39 54.193  -09 27 26.05  24.6w 15GO54    568  C~2lV7      
2016 06  04.39391  13 39 33.523  -09 25 51.08  24.8w 15GO54    568  C~2lV7      
2016 06  27.31561  13 38 42.285  -09 22 30.88  24.8w 15GO54    568  C~2lV7      
2016 07  07.31185  13 38 34.784  -09 22 29.58  24.7w 15GO54    568  C~2lV7      
2017 02  27.64549  13 52 06.591  -10 49 20.25        15GO54    568  C~2lV7      
2017 03  30.49241  13 50 04.078  -10 39 09.75  24.0w 15GO54    568  C~2lV7      
2017 05  24.25622  13 45 35.441  -10 16 53.05  24.6w 15GO54    568  C~2lV7      
2017 06  25.27303  13 44 01.953  -10 10 02.64  25.3w 15GO54    568  C~2lV7      
2017 06  25.28243  13 44 01.943  -10 10 02.47  25.2w 15GO54    568  C~2lV7      

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     0.38       0.00    -0.16
     2   0.0001     -1.78     0.04       0.10    -0.01
     3   0.0084   -111.03    -0.00      -2.79    -0.03
     4   0.0795  -1512.50     0.03     -35.85     0.02
     5   0.0849  -1649.59    -0.03     -39.21    -0.00
     6   0.1450  -3305.56    -0.09     -83.98     0.02
     7   0.1475  -3377.42     0.12     -86.02     0.13
     8   0.1476  -3381.20     0.03     -86.28     0.00
     9   0.1477  -3384.71    -0.06     -86.36     0.04
    10   0.1641  -3862.03    -0.36    -101.53     0.02
    11   0.1642  -3865.51     0.05    -101.84    -0.15
    12   0.2429  -6027.28     0.08    -190.36     0.00
    13   0.2652  -6540.87    -0.03    -219.76     0.05
    14   0.2654  -6544.42    -0.08    -220.03     0.02
    15   0.3390  -7705.82     0.03    -326.64     0.01
    16   0.3416  -7729.50    -0.00    -330.74    -0.12
    17   0.3964  -7913.96     0.05    -415.41     0.09
    18   0.9640   5649.62    -0.39    -937.61     0.05
    19   0.9640   5650.03     0.09    -937.62     0.05
    20   0.9831   5531.52    -0.02    -945.94     0.01
    21   1.0625   4290.15     0.10    -988.58    -0.22
    22   1.1251   2683.15    -0.00   -1034.46     0.05
    23   1.1415   2213.21     0.00   -1048.77     0.02
    24   1.1415   2212.63     0.07   -1049.02    -0.21
    25   1.2042    393.78    -0.03   -1111.66     0.05
    26   1.2042    392.37    -0.16   -1111.60     0.16
    27   1.2179     14.11     0.12   -1127.20    -0.01
    28   1.2179     12.74    -0.03   -1127.21     0.05
    29   1.2781  -1442.27     0.05   -1201.34    -0.01
    30   1.2947  -1761.82    -0.22   -1223.07     0.24
    31   1.3574  -2541.30     0.12   -1310.13    -0.06
    32   1.3848  -2645.30     0.02   -1349.04    -0.01
    33   2.0291  10422.31     0.02   -1941.25     0.03
    34   2.1135   8513.40    -0.03   -2006.37     0.08
    35   2.2635   4330.09     0.01   -2162.98    -0.09
    36   2.3511   2893.97     0.05   -2272.45    -0.13
    37   2.3512   2893.77     0.09   -2272.34     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.

15GO54    quality flag:3

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

axisobj        39.022    39.051    38.993
ecceobj         0.274     0.275     0.272
incobj         10.239    10.239    10.239
qmin           27.948    28.005    28.041
qmax           51.865    51.754    51.819
amean          39.456    39.455    39.456
amin           38.878    38.901    38.860
amax           40.127    40.127    40.163
emean           0.277     0.275     0.276
emin            0.263     0.258     0.262
emax            0.293     0.291     0.290
imean           9.508     9.828     9.282
imin            9.035     9.216     8.710
imax           10.019    10.435     9.978
excite_mean     0.322     0.324     0.319
fracstop        1.000     1.000     1.000
cjmean          2.933     2.931     2.935

libcent 0       179.9     179.3     180.3
libamp  0       127.1     123.2     133.5
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       173.9     174.7     179.4
kozaiamp        180.0     180.0     179.9