Orbit Fit and Astrometric record for 15GG54

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: 15GG54    
# Created Mon Apr 22 01:10:04 2019
# Orbit generated from Bernstein formalism
# Fitting   42 observations of   42
# Arc:   2.11y
# First observation: 2015/02/17
#  Last observation: 2017/03/29
Preliminary a, adot, b, bdot, g, gdot:
  -0.000264   0.034869   0.000001  -0.000415   0.030351   0.000000
# Chi-squared of fit:    11.31 DOF:   78 RMS:  0.09
# Min/Max residuals:    -0.20    0.29
# Exact a, adot, b, bdot, g, gdot:
  1.805611E-05  3.490119E-02  1.248160E-07 -4.172033E-04  3.059872E-02  8.470612E-03
# Covariance matrix:
  1.6699E-13 -1.0226E-14 -9.7794E-17 -7.6865E-16  1.2146E-13  1.2214E-12
 -1.0226E-14  2.8166E-13  3.6864E-16 -3.1729E-15  1.4940E-13  4.7906E-12
 -9.7794E-17  3.6864E-16  7.8960E-14 -6.3138E-14  7.0067E-17  9.5276E-15
 -7.6865E-16 -3.1729E-15 -6.3138E-14  9.0623E-14 -2.3608E-15 -7.9701E-14
  1.2146E-13  1.4940E-13  7.0067E-17 -2.3608E-15  2.0423E-13  3.6309E-12
  1.2214E-12  4.7906E-12  9.5276E-15 -7.9701E-14  3.6309E-12  1.2025E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.603555 -155.482753    0.819593    0.005908   -0.546834  2457071.006958
# Heliocentric elements and errors
Epoch:              2457070.5000  =  2015/02/17
Mean Anomaly:           40.06759 +/-     0.013
Argument of Peri:       72.70230 +/-     0.036
Long of Asc Node:       64.95038 +/-     0.021
Inclination:             0.88939 +/-     0.000
Eccentricity:         0.26645470 +/-    0.0003
Semi-Major Axis:     39.74280503 +/-    0.0074
Time of Perihelion: 2446885.1269 +/-       1.5
Perihelion:          29.15314777 +/-    0.0137
Aphelion:            50.33246228 +/-    0.0157
Period (y)              250.5509 +/-      0.07
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -30.57325274 +/-    0.0004
Ecliptic Y          -13.04200750 +/-    0.0002
Ecliptic Z            0.34425585 +/-    0.0000
Ecliptic XDOT         0.00060232 +/-    0.0000
Ecliptic YDOT        -0.00316148 +/-    0.0000
Ecliptic ZDOT        -0.00002925 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   33.24058145 +/-    0.0004
Geocenter to KBO     32.68110809 +/-    0.0005
# Hcoef:  9.36

The following table shows the complete astrometric record for 15GG54. 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 (15GG54) followed by the observatory code and reference code for the source of the astrometry.

2015 02  17.50618  13 31 43.505  -08 56 22.04  24.1r 15GG54    568  C~2lV6      
2015 02  17.54752  13 31 43.397  -08 56 21.24  24.4r 15GG54    568  C~2lV6      
2015 02  20.47836  13 31 35.594  -08 55 33.51  24.9r 15GG54    568  C~2lV6      
2015 03  18.46248  13 29 53.526  -08 45 22.35  24.7r 15GG54    568  C~2lV6      
2015 03  18.51370  13 29 53.262  -08 45 20.83  24.0r 15GG54    568  C~2lV6      
2015 03  20.51543  13 29 43.418  -08 44 22.43  24.5r 15GG54    568  C~2lV6      
2015 04  11.40623  13 27 45.737  -08 32 49.70  24.3r 15GG54    568  C~2lV6      
2015 04  12.35891  13 27 40.431  -08 32 18.37  24.4r 15GG54    568  C~2lV6      
2015 04  12.39987  13 27 40.192  -08 32 17.27  24.2r 15GG54    568  C~2lV6      
2015 04  12.44684  13 27 39.903  -08 32 15.69  24.1r 15GG54    568  C~2lV6      
2015 04  14.45679  13 27 28.618  -08 31 09.72  24.5r 15GG54    568  C~2lV6      
2015 04  16.40115  13 27 17.701  -08 30 05.80  24.0r 15GG54    568  C~2lV6      
2015 04  18.41739  13 27 06.404  -08 28 59.82  24.4r 15GG54    568  C~2lV6      
2015 04  18.46519  13 27 06.124  -08 28 58.31  24.5r 15GG54    568  C~2lV6      
2015 05  16.26178  13 24 41.850  -08 15 02.35  24.4r 15GG54    568  C~2lV6      
2015 05  25.36747  13 24 03.350  -08 11 22.81  24.3r 15GG54    568  C~2lV6      
2015 05  25.40947  13 24 03.191  -08 11 21.80  24.8r 15GG54    568  C~2lV6      
2015 05  25.41889  13 24 03.148  -08 11 21.69  24.2r 15GG54    568  C~2lV6      
2015 05  25.42508  13 24 03.128  -08 11 21.44  25.0r 15GG54    568  C~2lV6      
2015 06  21.31770  13 22 50.697  -08 04 43.16  24.5r 15GG54    568  C~2lV6      
2015 06  22.27415  13 22 49.429  -08 04 36.84  24.7r 15GG54    568  C~2lV6      
2015 07  12.26825  13 22 45.361  -08 04 40.23  24.6r 15GG54    568  C~2lV6      
2015 07  19.25818  13 22 54.270  -08 05 42.74  24.5r 15GG54    568  C~2lV6      
2016 02  04.60217  13 39 32.462  -09 43 15.28  24.9w 15GG54    568  C~2lV6      
2016 02  10.62117  13 39 25.186  -09 42 28.64  24.9w 15GG54    568  C~2lV6      
2016 03  11.58783  13 37 54.158  -09 33 27.30  24.7w 15GG54    568  C~2lV6      
2016 03  11.63454  13 37 53.944  -09 33 26.17  24.1w 15GG54    568  C~2lV6      
2016 03  12.48427  13 37 50.264  -09 33 04.32  24.8w 15GG54    568  C~2lV6      
2016 04  09.44264  13 35 27.260  -09 19 15.80  24.6w 15GG54    568  C~2lV6      
2016 05  02.31935  13 33 21.054  -09 07 12.41  24.5w 15GG54    568  C~2lV6      
2016 05  02.32341  13 33 21.029  -09 07 12.38  24.6w 15GG54    568  C~2lV6      
2016 05  06.32911  13 33 00.133  -09 05 13.38  24.5w 15GG54    568  C~2lV6      
2016 05  06.33319  13 33 00.119  -09 05 13.34  24.8w 15GG54    568  C~2lV6      
2016 05  28.31243  13 31 21.081  -08 55 54.90  25.0w 15GG54    568  C~2lV6      
2016 05  29.31935  13 31 17.332  -08 55 34.10  24.5w 15GG54    568  C~2lV6      
2016 06  04.38178  13 30 56.590  -08 53 39.56  24.8w 15GG54    568  C~2lV6      
2016 06  27.30147  13 30 09.466  -08 49 32.10  25.0w 15GG54    568  C~2lV6      
2016 06  27.30677  13 30 09.464  -08 49 31.88  24.7w 15GG54    568  C~2lV6      
2016 07  07.30364  13 30 05.960  -08 49 24.63  24.7w 15GG54    568  C~2lV6      
2017 02  24.65166  13 46 15.261  -10 22 37.02        15GG54    568  C~2lV6      
2017 03  29.48748  13 43 57.446  -10 09 27.12  24.8w 15GG54    568  C~2lV6      
2017 03  29.50900  13 43 57.337  -10 09 26.84  24.8w 15GG54    568  C~2lV6      

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    -0.00       0.00    -0.07
  2   0.0001     -1.78    -0.06       0.16     0.08
  3   0.0081   -126.85    -0.01       2.20     0.01
  4   0.0793  -1758.46     0.06      15.55    -0.06
  5   0.0794  -1762.66    -0.08      15.52    -0.07
  6   0.0849  -1919.86     0.02      16.19     0.03
  7   0.1448  -3797.86    -0.20      17.66     0.07
  8   0.1474  -3882.60     0.27      17.76     0.28
  9   0.1476  -3886.31     0.29      17.47     0.03
 10   0.1477  -3890.87    -0.00      17.36    -0.04
 11   0.1532  -4070.87     0.08      16.92    -0.09
 12   0.1585  -4245.05    -0.03      16.56    -0.02
 13   0.1640  -4425.25     0.05      16.01     0.00
 14   0.1642  -4429.67    -0.03      15.88    -0.09
 15   0.2403  -6729.81    -0.00       0.52    -0.08
 16   0.2652  -7342.75    -0.11      -7.54    -0.09
 17   0.2653  -7345.32    -0.03      -7.48     0.03
 18   0.2653  -7345.95    -0.07      -7.61    -0.10
 19   0.2653  -7346.32    -0.05      -7.49     0.03
 20   0.3390  -8494.54     0.04     -37.11     0.02
 21   0.3416  -8514.41     0.02     -38.24     0.04
 22   0.3963  -8569.33    -0.13     -63.87    -0.06
 23   0.4155  -8423.02    -0.02     -72.73     0.14
 24   0.9640   7492.35     0.03     -95.09     0.01
 25   0.9805   7375.03    -0.17     -90.46     0.02
 26   1.0625   5922.69    -0.06     -72.83    -0.01
 27   1.0626   5919.33    -0.14     -72.93    -0.10
 28   1.0650   5860.63     0.07     -72.29     0.14
 29   1.1415   3586.96    -0.01     -68.80     0.05
 30   1.2041   1582.89     0.13     -76.60     0.06
 31   1.2042   1582.53     0.12     -76.71    -0.04
 32   1.2151   1250.94    -0.05     -79.04     0.01
 33   1.2151   1250.73     0.08     -79.08    -0.02
 34   1.2753   -319.11     0.11     -96.52     0.05
 35   1.2781   -378.42    -0.02     -97.54     0.01
 36   1.2947   -706.38    -0.01    -103.71    -0.02
 37   1.3574  -1446.91    -0.03    -129.92    -0.20
 38   1.3574  -1447.02    -0.06    -129.72     0.01
 39   1.3848  -1497.99    -0.03    -142.06    -0.03
 40   2.0209  13910.60     0.00    -164.81     0.04
 41   2.1108  11720.08    -0.09    -153.72     0.16
 42   2.1109  11718.47     0.11    -154.03    -0.15

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.

15GG54    quality flag:3

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

axisobj        39.363    39.386    39.339
ecceobj         0.261     0.262     0.260
incobj          0.890     0.890     0.890
qmin           28.551    28.603    28.597
qmax           51.105    51.096    51.103
amean          39.456    39.456    39.456
amin           38.923    38.920    38.909
amax           40.076    40.063    40.067
emean           0.261     0.261     0.260
emin            0.246     0.246     0.246
emax            0.276     0.276     0.276
imean           0.974     1.022     0.984
imin            0.503     0.579     0.512
imax            1.362     1.446     1.361
excite_mean     0.261     0.262     0.261
fracstop        1.000     1.000     1.000
cjmean          2.973     2.972     2.973

libcent 0       180.0     180.9     180.6
libamp  0       119.1     118.4     119.1
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       244.1     239.4     238.8
kozaiamp        179.9     180.0     179.6