Orbit Fit and Astrometric record for 15GH54

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: 15GH54    
# Created Mon Apr 22 01:10:04 2019
# Orbit generated from Bernstein formalism
# Fitting   29 observations of   29
# Arc:   1.38y
# First observation: 2015/02/17
#  Last observation: 2016/07/07
Preliminary a, adot, b, bdot, g, gdot:
  -0.000229   0.043025  -0.000011  -0.013918   0.034576   0.000000
# Chi-squared of fit:     7.61 DOF:   52 RMS:  0.09
# Min/Max residuals:    -0.20    0.20
# Exact a, adot, b, bdot, g, gdot:
  1.965010E-05  4.269232E-02 -6.210102E-06 -1.389460E-02  3.463037E-02 -1.524002E-03
# Covariance matrix:
  2.6621E-13  2.4534E-13  3.0344E-14 -2.2017E-13  3.4769E-13  1.2089E-11
  2.4534E-13  1.4061E-12  1.0390E-13 -7.5254E-13  8.8758E-13  4.1307E-11
  3.0344E-14  1.0390E-13  1.0452E-13 -1.7882E-13  7.8584E-14  3.7956E-12
 -2.2017E-13 -7.5254E-13 -1.7882E-13  7.6812E-13 -5.6963E-13 -2.7485E-11
  3.4769E-13  8.8758E-13  7.8584E-14 -5.6963E-13  7.7501E-13  3.1272E-11
  1.2089E-11  4.1307E-11  3.7956E-12 -2.7485E-11  3.1272E-11  1.5086E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.268771 -154.930754    0.824863    0.002676   -0.538878  2457071.002878
# Heliocentric elements and errors
Epoch:              2457070.5000  =  2015/02/17
Mean Anomaly:          350.74653 +/-     0.127
Argument of Peri:      195.48459 +/-     0.229
Long of Asc Node:       24.26994 +/-     0.000
Inclination:            18.02683 +/-     0.001
Eccentricity:         0.26288228 +/-    0.0003
Semi-Major Axis:     39.58939010 +/-    0.0062
Time of Perihelion: 2459409.1703 +/-      32.1
Perihelion:          29.18204106 +/-    0.0116
Aphelion:            49.99673914 +/-    0.0133
Period (y)              249.1015 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -26.99624506 +/-    0.0007
Ecliptic Y          -11.71626431 +/-    0.0003
Ecliptic Z            0.13527154 +/-    0.0000
Ecliptic XDOT         0.00153094 +/-    0.0000
Ecliptic YDOT        -0.00301397 +/-    0.0000
Ecliptic ZDOT        -0.00109896 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   29.42934581 +/-    0.0006
Geocenter to KBO     28.87638564 +/-    0.0007
# Hcoef:  9.74

The following table shows the complete astrometric record for 15GH54. 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 (15GH54) followed by the observatory code and reference code for the source of the astrometry.

2015 02  17.50210  13 33 18.629  -09 27 10.65  24.1r 15GH54    568  C~2lV6      
2015 02  17.54344  13 33 18.508  -09 27 10.42  24.5r 15GH54    568  C~2lV6      
2015 02  20.47426  13 33 09.571  -09 26 41.55  24.5r 15GH54    568  C~2lV6      
2015 03  18.47063  13 31 12.546  -09 18 51.71  24.8r 15GH54    568  C~2lV6      
2015 03  18.47537  13 31 12.506  -09 18 51.71  24.4r 15GH54    568  C~2lV6      
2015 03  18.52182  13 31 12.243  -09 18 50.72  24.5r 15GH54    568  C~2lV6      
2015 03  20.52388  13 31 00.926  -09 18 01.17  24.2r 15GH54    568  C~2lV6      
2015 04  11.41445  13 28 45.543  -09 07 53.92  24.2r 15GH54    568  C~2lV6      
2015 04  12.36711  13 28 39.377  -09 07 25.75  24.0r 15GH54    568  C~2lV6      
2015 04  12.40803  13 28 39.125  -09 07 24.69  24.2r 15GH54    568  C~2lV6      
2015 04  12.45503  13 28 38.802  -09 07 23.22  24.1r 15GH54    568  C~2lV6      
2015 04  14.46499  13 28 25.804  -09 06 24.15  24.3r 15GH54    568  C~2lV6      
2015 04  18.42564  13 28 00.165  -09 04 27.71  24.0r 15GH54    568  C~2lV6      
2015 04  18.47335  13 27 59.859  -09 04 26.26  23.8r 15GH54    568  C~2lV6      
2015 05  25.36747  13 24 28.295  -08 48 56.64  24.7r 15GH54    568  C~2lV6      
2015 05  25.40947  13 24 28.090  -08 48 55.79  24.2r 15GH54    568  C~2lV6      
2015 05  25.41889  13 24 28.033  -08 48 55.62  25.0r 15GH54    568  C~2lV6      
2015 05  25.42508  13 24 28.008  -08 48 55.51  24.3r 15GH54    568  C~2lV6      
2015 06  21.31770  13 23 02.856  -08 44 19.55  24.5r 15GH54    568  C~2lV6      
2015 06  22.27415  13 23 01.315  -08 44 18.48  24.3r 15GH54    568  C~2lV6      
2015 07  12.26825  13 22 54.712  -08 46 25.39  24.4r 15GH54    568  C~2lV6      
2015 07  19.25818  13 23 04.149  -08 48 18.82  24.2r 15GH54    568  C~2lV6      
2016 02  04.61835  13 41 49.935  -11 05 17.63  24.8w 15GH54    568  C~2lV6      
2016 02  11.60157  13 41 39.983  -11 05 27.58  24.6w 15GH54    568  C~2lV6      
2016 03  11.59247  13 39 57.174  -11 00 17.88  24.4w 15GH54    568  C~2lV6      
2016 04  03.46553  13 37 45.180  -10 51 13.78  24.3w 15GH54    568  C~2lV6      
2016 04  09.44668  13 37 06.802  -10 48 27.08  24.2w 15GH54    568  C~2lV6      
2016 06  27.29699  13 30 53.131  -10 22 35.22  24.6w 15GH54    568  C~2lV6      
2016 07  07.29960  13 30 48.050  -10 23 12.03  24.0w 15GH54    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    -0.03       0.00    -0.03
  2   0.0001     -1.75     0.05      -0.44    -0.13
  3   0.0081   -135.39    -0.16     -21.87     0.03
  4   0.0793  -1919.15     0.15    -218.54     0.11
  5   0.0793  -1919.70     0.02    -218.76    -0.07
  6   0.0795  -1923.68     0.10    -219.26    -0.18
  7   0.0849  -2097.72     0.03    -234.60    -0.01
  8   0.1449  -4185.65     0.01    -406.60    -0.01
  9   0.1475  -4280.96    -0.20    -414.04     0.09
 10   0.1476  -4284.82     0.10    -414.43     0.06
 11   0.1477  -4289.82    -0.12    -414.83     0.07
 12   0.1532  -4490.64     0.14    -430.84     0.08
 13   0.1641  -4886.78    -0.07    -462.59    -0.07
 14   0.1642  -4891.53     0.02    -462.91     0.02
 15   0.2652  -8151.27     0.17    -758.96     0.00
 16   0.2653  -8154.42     0.00    -759.30     0.02
 17   0.2653  -8155.26    -0.18    -759.46    -0.06
 18   0.2654  -8155.65    -0.13    -759.49    -0.04
 19   0.3390  -9432.52     0.01    -972.41     0.03
 20   0.3416  -9454.18    -0.02    -979.93    -0.03
 21   0.3963  -9497.96    -0.06   -1134.31     0.17
 22   0.4155  -9325.56     0.20   -1187.61     0.05
 23   0.9640   9173.04    -0.11   -2755.32    -0.01
 24   0.9832   9039.64     0.10   -2817.25    -0.09
 25   1.0625   7513.48     0.03   -3072.75    -0.12
 26   1.1252   5502.01    -0.00   -3267.38     0.08
 27   1.1415   4914.17    -0.03   -3316.77     0.01
 28   1.3574   -783.57     0.05   -3881.30     0.07
 29   1.3848   -839.81    -0.06   -3943.08    -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.

15GH54    quality flag:3

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

axisobj        39.197    39.218    39.176
ecceobj         0.256     0.256     0.256
incobj         18.083    18.083    18.083
qmin           27.318    27.294    27.423
qmax           52.095    52.066    52.217
amean          39.455    39.455    39.455
amin           39.007    38.998    38.971
amax           39.989    39.991    40.000
emean           0.231     0.232     0.231
emin            0.164     0.166     0.167
emax            0.306     0.306     0.306
imean          18.961    18.927    18.979
imin           15.594    15.525    15.693
imax           21.028    21.001    20.962
excite_mean     0.401     0.401     0.401
fracstop        1.000     1.000     1.000
cjmean          2.867     2.867     2.867

libcent 0       179.3     180.5     180.2
libamp  0        97.0      97.4     100.9
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       238.4     238.3     241.0
kozaiamp        179.9     180.0     180.0