Orbit Fit and Astrometric record for 15GT54

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: 15GT54    
# Created Thu Feb 21 02:10:16 2019
# Orbit generated from Bernstein formalism
# Fitting   30 observations of   30
# Arc:   2.25y
# First observation: 2015/02/17
#  Last observation: 2017/05/18
Preliminary a, adot, b, bdot, g, gdot:
  -0.000124   0.031966   0.000012  -0.003311   0.028883   0.000000
# Chi-squared of fit:    16.43 DOF:   54 RMS:  0.13
# Min/Max residuals:    -0.28    0.36
# Exact a, adot, b, bdot, g, gdot:
  1.824928E-05  3.155985E-02 -1.718883E-06 -3.268300E-03  2.881560E-02 -4.237034E-03
# Covariance matrix:
  1.7043E-13 -1.1944E-14  5.6007E-16 -7.2998E-15  1.2267E-13  1.2278E-12
 -1.1944E-14  4.2585E-13  8.3993E-15 -4.9219E-14  2.1835E-13  7.9334E-12
  5.6007E-16  8.3993E-15  9.4828E-14 -7.1149E-14  4.5019E-15  2.1081E-13
 -7.2998E-15 -4.9219E-14 -7.1149E-14  1.1280E-13 -3.1496E-14 -1.2227E-12
  1.2267E-13  2.1835E-13  4.5019E-15 -3.1496E-14  2.5468E-13  5.1418E-12
  1.2278E-12  7.9334E-12  2.1081E-13 -1.2227E-12  5.1418E-12  1.9692E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    2.325987 -156.419942    0.809840    0.022917   -0.560746  2457071.077078
# Heliocentric elements and errors
Epoch:              2457070.5000  =  2015/02/17
Mean Anomaly:          313.27375 +/-     0.032
Argument of Peri:      223.39488 +/-     0.070
Long of Asc Node:       43.45299 +/-     0.002
Inclination:             6.30757 +/-     0.001
Eccentricity:         0.18473578 +/-    0.0004
Semi-Major Axis:     39.40544261 +/-    0.0066
Time of Perihelion: 2468797.6145 +/-       7.4
Perihelion:          32.12584733 +/-    0.0176
Aphelion:            46.68503789 +/-    0.0185
Period (y)              247.3674 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -32.62063926 +/-    0.0006
Ecliptic Y          -13.35324165 +/-    0.0002
Ecliptic Z            1.40837960 +/-    0.0000
Ecliptic XDOT         0.00155298 +/-    0.0000
Ecliptic YDOT        -0.00259792 +/-    0.0000
Ecliptic ZDOT        -0.00032652 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   35.27603579 +/-    0.0005
Geocenter to KBO     34.70342431 +/-    0.0006
# Hcoef:  9.50

The following table shows the complete astrometric record for 15GT54. 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 (15GT54) followed by the observatory code and reference code for the source of the astrometry.

2015 02  17.57630  13 30 45.400  -06 59 36.39  24.5r 15GT54    568  C~2lV8      
2015 02  17.61724  13 30 45.315  -06 59 35.84  25.2r 15GT54    568  C~2lV8      
2015 02  20.61032  13 30 37.479  -06 58 44.70  24.6r 15GT54    568  C~2lV8      
2015 03  18.55474  13 28 58.977  -06 48 41.63  24.9r 15GT54    568  C~2lV8      
2015 03  18.59568  13 28 58.780  -06 48 40.50  24.6r 15GT54    568  C~2lV8      
2015 03  20.55852  13 28 49.517  -06 47 45.88  24.8r 15GT54    568  C~2lV8      
2015 04  11.49312  13 26 56.754  -06 36 59.32  24.8r 15GT54    568  C~2lV8      
2015 04  13.35741  13 26 46.759  -06 36 03.50  25.1r 15GT54    568  C~2lV8      
2015 04  13.39836  13 26 46.545  -06 36 02.44  24.8r 15GT54    568  C~2lV8      
2015 04  13.47268  13 26 46.138  -06 36 00.12  24.7r 15GT54    568  C~2lV8      
2015 04  13.47763  13 26 46.121  -06 35 59.91  24.6r 15GT54    568  C~2lV8      
2015 04  19.39819  13 26 14.429  -06 33 04.51  24.5r 15GT54    568  C~2lV8      
2015 04  19.51516  13 26 13.769  -06 33 01.63  24.0r 15GT54    568  C~2lV8      
2015 05  18.27253  13 23 52.749  -06 20 42.07  24.5r 15GT54    568  C~2lV8      
2015 06  20.27087  13 22 15.200  -06 13 52.79  24.9r 15GT54    568  C~2lV8      
2015 06  20.31175  13 22 15.145  -06 13 52.60  25.5r 15GT54    568  C~2lV8      
2015 06  22.31546  13 22 12.352  -06 13 47.94  25.1r 15GT54    568  C~2lV8      
2015 07  14.26780  13 22 08.611  -06 15 37.76  24.6r 15GT54    568  C~2lV8      
2016 02  10.55526  13 37 32.843  -07 51 35.24  24.1w 15GT54    568  C~2lV8      
2016 02  11.57713  13 37 31.158  -07 51 23.92  25.2w 15GT54    568  C~2lV8      
2016 03  11.55250  13 36 03.011  -07 42 21.51  25.7w 15GT54    568  C~2lV8      
2016 03  12.47618  13 35 59.102  -07 41 58.76  25.1w 15GT54    568  C~2lV8      
2016 04  03.43722  13 34 12.610  -07 31 48.90  25.2w 15GT54    568  C~2lV8      
2016 04  09.41701  13 33 40.768  -07 28 51.99  25.4w 15GT54    568  C~2lV8      
2016 06  27.28082  13 28 33.579  -07 04 09.29  25.2w 15GT54    568  C~2lV8      
2016 07  06.31671  13 28 29.693  -07 04 37.94  25.4w 15GT54    568  C~2lV8      
2016 07  07.28338  13 28 29.752  -07 04 44.48  25.3w 15GT54    568  C~2lV8      
2017 02  24.64707  13 43 38.166  -08 38 34.81        15GT54    568  C~2lV8      
2017 03  29.46871  13 41 22.332  -08 25 36.80  25.0w 15GT54    568  C~2lV8      
2017 05  18.26658  13 37 03.868  -08 02 52.89  25.1w 15GT54    568  C~2lV8      

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    -0.19       0.00    -0.02
  2   0.0001     -1.38     0.13       0.05    -0.01
  3   0.0083   -128.68     0.06       4.76     0.02
  4   0.0793  -1714.55    -0.03      26.11    -0.01
  5   0.0795  -1717.69    -0.06      26.08    -0.03
  6   0.0848  -1866.09    -0.09      26.07    -0.03
  7   0.1449  -3666.33     0.06       7.74     0.03
  8   0.1500  -3825.40    -0.14       4.63    -0.00
  9   0.1501  -3828.76     0.05       4.44    -0.10
 10   0.1503  -3835.25     0.00       4.36    -0.01
 11   0.1503  -3835.56     0.12       4.46     0.10
 12   0.1665  -4339.41     0.21      -6.96     0.36
 13   0.1668  -4349.61     0.07      -7.92    -0.28
 14   0.2456  -6577.58     0.01     -98.60     0.06
 15   0.3359  -8081.98    -0.05    -258.09    -0.03
 16   0.3360  -8082.82     0.06    -258.22     0.08
 17   0.3415  -8123.28    -0.11    -269.36    -0.17
 18   0.4016  -8134.32    -0.10    -392.14     0.08
 19   0.9801   6783.45     0.05    -687.91     0.15
 20   0.9829   6755.98    -0.09    -686.47    -0.00
 21   1.0622   5337.15    -0.23    -658.26     0.13
 22   1.0647   5274.70     0.05    -658.26    -0.12
 23   1.1249   3577.25     0.04    -668.42    -0.01
 24   1.1412   3071.68     0.29    -676.90    -0.28
 25   1.3572  -1724.52    -0.07    -975.66     0.01
 26   1.3819  -1767.75     0.08   -1023.61     0.29
 27   1.3846  -1764.53    -0.17   -1029.37    -0.28
 28   2.0207  12873.78    -0.19   -1354.76    -0.01
 29   2.1106  10706.73     0.14   -1355.84     0.04
 30   2.2469   6628.97     0.07   -1476.15     0.03

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.

15GT54    quality flag:3

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

axisobj        39.049    39.062    39.037
ecceobj         0.182     0.183     0.181
incobj          6.325     6.325     6.325
qmin           31.317    31.290    31.235
qmax           48.447    48.379    48.433
amean          39.457    39.457    39.458
amin           38.910    38.914    38.895
amax           40.071    40.041    40.108
emean           0.190     0.191     0.188
emin            0.170     0.173     0.169
emax            0.209     0.209     0.210
imean           5.095     5.096     5.108
imin            4.162     4.398     4.078
imax            6.093     5.879     6.121
excite_mean     0.210     0.211     0.208
fracstop        1.000     1.000     1.000
cjmean          3.002     3.001     3.002

libcent 0       180.0     179.8     180.8
libamp  0       128.9     126.8     131.1
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       188.7     186.2     153.4
kozaiamp        180.0     180.0     179.9