Orbit Fit and Astrometric record for 15GO55

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: 15GO55    
# Created Fri Feb 22 02:10:22 2019
# Orbit generated from Bernstein formalism
# Fitting   30 observations of   30
# Arc:   2.33y
# First observation: 2015/02/20
#  Last observation: 2017/06/22
Preliminary a, adot, b, bdot, g, gdot:
  -0.000068   0.026099   0.000011  -0.003566   0.025522   0.000000
# Chi-squared of fit:     4.64 DOF:   54 RMS:  0.07
# Min/Max residuals:    -0.14    0.18
# Exact a, adot, b, bdot, g, gdot:
  1.603337E-05  2.599668E-02 -1.509005E-06 -3.542401E-03  2.559260E-02 -2.244642E-03
# Covariance matrix:
  2.4383E-13 -3.7883E-14  2.7619E-15 -1.2678E-14  1.5765E-13  1.8605E-12
 -3.7883E-14  3.2977E-13  1.3283E-14 -5.0891E-14  1.9206E-13  7.3336E-12
  2.7619E-15  1.3283E-14  1.3389E-13 -1.0263E-13  1.0806E-14  4.6099E-13
 -1.2678E-14 -5.0891E-14 -1.0263E-13  1.2927E-13 -4.3702E-14 -1.7602E-12
  1.5765E-13  1.9206E-13  1.0806E-14 -4.3702E-14  2.8548E-13  6.3345E-12
  1.8605E-12  7.3336E-12  4.6099E-13 -1.7602E-12  6.3345E-12  2.5356E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    3.357090 -158.173581    0.760274    0.036887   -0.626542  2457074.106708
# Heliocentric elements and errors
Epoch:              2457070.5000  =  2015/02/17
Mean Anomaly:          309.36588 +/-     0.087
Argument of Peri:      219.22280 +/-     0.146
Long of Asc Node:       43.78512 +/-     0.002
Inclination:             8.38233 +/-     0.001
Eccentricity:         0.12210756 +/-    0.0006
Semi-Major Axis:     42.58383713 +/-    0.0067
Time of Perihelion: 2471346.4951 +/-      24.4
Perihelion:          37.38402854 +/-    0.0248
Aphelion:            47.78364572 +/-    0.0252
Period (y)              277.8916 +/-      0.07
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -37.07862628 +/-    0.0008
Ecliptic Y          -14.03012387 +/-    0.0003
Ecliptic Z            2.28806179 +/-    0.0000
Ecliptic XDOT         0.00123230 +/-    0.0000
Ecliptic YDOT        -0.00250643 +/-    0.0000
Ecliptic ZDOT        -0.00039228 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   39.71025219 +/-    0.0007
Geocenter to KBO     39.07379020 +/-    0.0008
# Hcoef:  8.42

The following table shows the complete astrometric record for 15GO55. 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 (15GO55) followed by the observatory code and reference code for the source of the astrometry.

2015 02  20.60593  13 25 44.306  -05 23 19.23  24.2r 15GO55    568  C~2lVB      
2015 03  18.55062  13 24 13.166  -05 13 38.76  24.6r 15GO55    568  C~2lVB      
2015 03  18.59161  13 24 12.989  -05 13 37.83  24.2r 15GO55    568  C~2lVB      
2015 04  11.48904  13 22 22.702  -05 02 57.80  24.0r 15GO55    568  C~2lVB      
2015 04  13.35330  13 22 13.755  -05 02 07.77  24.1r 15GO55    568  C~2lVB      
2015 04  13.39426  13 22 13.549  -05 02 06.74  24.2r 15GO55    568  C~2lVB      
2015 04  13.46376  13 22 13.210  -05 02 04.90  24.3r 15GO55    568  C~2lVB      
2015 04  13.46849  13 22 13.187  -05 02 04.88  24.2r 15GO55    568  C~2lVB      
2015 06  20.26671  13 18 12.695  -04 43 44.57  24.4r 15GO55    568  C~2lVB      
2015 06  20.30767  13 18 12.636  -04 43 44.53  24.5r 15GO55    568  C~2lVB      
2015 06  22.31136  13 18 10.225  -04 43 44.33  24.3r 15GO55    568  C~2lVB      
2015 07  14.26266  13 18 07.419  -04 46 09.89  24.4r 15GO55    568  C~2lVB      
2015 07  20.25407  13 18 14.305  -04 47 35.89  24.3r 15GO55    568  C~2lVB      
2016 02  04.54303  13 31 30.908  -06 11 26.47  24.7w 15GO55    568  C~2lVB      
2016 02  10.53099  13 31 22.849  -06 10 22.50  24.4w 15GO55    568  C~2lVB      
2016 03  11.52813  13 29 57.641  -06 01 06.16  24.6w 15GO55    568  C~2lVB      
2016 03  17.46439  13 29 33.639  -05 58 41.26  25.6w 15GO55    568  C~2lVB      
2016 04  03.41700  13 28 17.227  -05 51 17.43  24.5w 15GO55    568  C~2lVB      
2016 04  09.39673  13 27 48.602  -05 48 36.94  24.3w 15GO55    568  C~2lVB      
2016 05  01.34835  13 26 04.303  -05 39 19.96  24.3w 15GO55    568  C~2lVB      
2016 05  01.39731  13 26 04.085  -05 39 19.03  24.3w 15GO55    568  C~2lVB      
2016 05  02.29095  13 26 00.038  -05 38 58.42  24.5w 15GO55    568  C~2lVB      
2016 05  06.30070  13 25 42.185  -05 37 28.60  24.4w 15GO55    568  C~2lVB      
2016 05  28.26386  13 24 18.118  -05 30 59.71  24.3w 15GO55    568  C~2lVB      
2016 06  04.34531  13 23 57.389  -05 29 38.79  24.2w 15GO55    568  C~2lVB      
2016 06  27.27676  13 23 17.731  -05 28 15.88  24.5w 15GO55    568  C~2lVB      
2016 07  06.31265  13 23 14.773  -05 29 02.24  23.6w 15GO55    568  C~2lVB      
2017 02  24.63168  13 36 09.476  -06 51 09.80        15GO55    568  C~2lVB      
2017 03  29.44523  13 34 03.912  -06 38 40.50  24.5w 15GO55    568  C~2lVB      
2017 06  22.27110  13 28 38.793  -06 12 41.37  24.6w 15GO55    568  C~2lVB      

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     0.01       0.00    -0.14
  2   0.0710  -1479.48    -0.05      33.73     0.02
  3   0.0711  -1482.28     0.01      33.61    -0.09
  4   0.1366  -3250.02    -0.01      15.14    -0.08
  5   0.1417  -3392.76     0.04      11.82     0.17
  6   0.1418  -3396.00    -0.01      11.63     0.09
  7   0.1420  -3401.39     0.01      11.46     0.09
  8   0.1420  -3401.72     0.06      11.35    -0.01
  9   0.3276  -7149.62     0.00    -308.17    -0.04
 10   0.3277  -7150.45    -0.04    -308.46    -0.04
 11   0.3332  -7184.00    -0.01    -321.75     0.04
 12   0.3933  -7168.51     0.01    -472.53     0.02
 13   0.4097  -7040.75    -0.03    -513.86     0.05
 14   0.9553   5875.07     0.01    -770.33     0.03
 15   0.9717   5739.66    -0.08    -755.15     0.02
 16   1.0539   4352.33    -0.10    -706.80    -0.04
 17   1.0701   3965.91    -0.01    -704.36    -0.01
 18   1.1165   2742.19     0.04    -713.33    -0.06
 19   1.1329   2285.90     0.06    -722.26     0.03
 20   1.1930    633.55    -0.02    -781.52     0.13
 21   1.1931    630.19     0.18    -781.86    -0.01
 22   1.1956    566.44     0.11    -785.12    -0.05
 23   1.2066    285.63    -0.08    -800.53    -0.03
 24   1.2667  -1024.13    -0.01    -905.29    -0.12
 25   1.2861  -1341.55    -0.00    -945.15     0.02
 26   1.3489  -1922.14    -0.14   -1088.31    -0.14
 27   1.3736  -1945.90     0.09   -1147.78     0.09
 28   2.0124  10619.81     0.06   -1462.42    -0.08
 29   2.1022   8600.49    -0.04   -1451.24     0.09
 30   2.3345   3516.13    -0.03   -1787.49     0.04

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.

15GO55    quality flag:2

Type:       SCATNEAR  SCATNEAR     5:3EE

axisobj        42.187    42.201    42.173
ecceobj         0.119     0.120     0.118
incobj          8.407     8.407     8.407
qmin           36.546    36.531    35.232
qmax           48.778    48.627    50.073
amean          42.327    42.326    42.328
amin           41.838    41.848    41.834
amax           42.860    42.856    42.838
emean           0.118     0.110     0.127
emin            0.084     0.069     0.092
emax            0.139     0.137     0.169
imean           6.366     6.017     6.016
imin            4.622     3.836     3.157
imax            7.965     7.860     8.217
excite_mean     0.162     0.153     0.166
fracstop        1.000     1.000     1.000
cjmean          3.050     3.054     3.049

libcent 0      -180.0    -180.0     177.7
libamp  0      -180.0    -180.0     145.2
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       189.8     183.8     196.3
kozaiamp        180.0     180.0     179.8