Orbit Fit and Astrometric record for 15VL165

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: 15VL165   
# Created Sat Dec  4 02:13:38 2021
# Orbit generated from Bernstein formalism
# Fitting     35 observations of     35
# Arc:   2.84y
# First observation: 2014/11/17
#  Last observation: 2017/09/20
Preliminary a, adot, b, bdot, g, gdot:
  -0.000084   0.033362   0.000011  -0.013868   0.030775   0.000000
# Chi-squared of fit:     1.75 DOF:     64 RMS:  0.04
# Min/Max residuals:    -0.12    0.15
# Exact a, adot, b, bdot, g, gdot:
  1.709029E-05  3.346026E-02 -7.026836E-06 -1.393456E-02  3.094949E-02 -1.123148E-03
# Covariance matrix:
  2.4484E-13 -2.7693E-13 -3.1049E-14  7.0933E-14 -1.0452E-13 -1.9412E-12
 -2.7693E-13  4.4630E-13  6.1969E-14 -1.4138E-13  1.9563E-13  3.8720E-12
 -3.1049E-14  6.1969E-14  1.6278E-13 -1.1654E-13  3.3733E-14  6.5225E-13
  7.0933E-14 -1.4138E-13 -1.1654E-13  1.3259E-13 -7.8916E-14 -1.4892E-12
 -1.0452E-13  1.9563E-13  3.3733E-14 -7.8916E-14  2.3873E-13  2.1319E-12
 -1.9412E-12  3.8720E-12  6.5225E-13 -1.4892E-12  2.1319E-12  4.0768E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -2.012370   48.192505   -0.107936   -0.034393   -0.982969  2456978.772168
# Heliocentric elements and errors
Epoch:              2456970.5000  =  2014/11/09
Mean Anomaly:          350.94472 +/-     0.051
Argument of Peri:      197.68559 +/-     0.071
Long of Asc Node:      223.70298 +/-     0.000
Inclination:            22.68147 +/-     0.000
Eccentricity:         0.16072150 +/-    0.0001
Semi-Major Axis:     39.53591807 +/-    0.0026
Time of Perihelion: 2459254.4442 +/-      12.8
Perihelion:          33.18164610 +/-    0.0032
Aphelion:            45.89019005 +/-    0.0039
Period (y)              248.5970 +/-      0.02
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           22.09815614 +/-    0.0003
Ecliptic Y           24.87573223 +/-    0.0004
Ecliptic Z           -1.13483889 +/-    0.0000
Ecliptic XDOT        -0.00230564 +/-    0.0000
Ecliptic YDOT         0.00186195 +/-    0.0000
Ecliptic ZDOT        -0.00122833 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   33.29291844 +/-    0.0004
Geocenter to KBO     32.31071269 +/-    0.0005
# Hcoef:  7.62

The following table shows the complete astrometric record for 15VL165. 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 (15VL165) followed by the observatory code and reference code for the source of the astrometry.

2014 11  17.27139  03 05 14.649  +15 18 48.14  22.6r 15VL165   568  C~2lVa      
2014 11  17.38009  03 05 13.995  +15 18 44.69  22.7r 15VL165   568  C~2lVa      
2014 11  17.49387  03 05 13.310  +15 18 40.98  22.9r 15VL165   568  C~2lVa      
2014 11  19.28114  03 05 02.766  +15 17 43.67  22.8r 15VL165   568  C~2lVa      
2014 11  23.38468  03 04 38.740  +15 15 33.89  22.9r 15VL165   568  C~2lVa      
2015 08  11.60150  03 18 59.553  +15 42 16.53  23.3w 15VL165   568  C~2lVa      
2015 09  06.61481  03 19 05.104  +15 37 07.69  23.0w 15VL165   568  C~2lVa      
2015 09  12.50491  03 18 55.380  +15 35 16.34  23.1w 15VL165   568  C~2lVb      
2015 10  07.42821  03 17 33.980  +15 25 04.37  23.1w 15VL165   568  C~2lVb      
2015 10  08.44001  03 17 29.469  +15 24 35.52  23.1w 15VL165   568  C~2lVb      
2015 10  08.49908  03 17 29.197  +15 24 33.81  23.0w 15VL165   568  C~2lVb      
2015 11  07.34843  03 14 48.511  +15 09 06.81  22.8r 15VL165   568  C~2lVb      
2015 11  07.39058  03 14 48.256  +15 09 05.48  22.9r 15VL165   568  C~2lVb      
2015 11  07.43274  03 14 47.999  +15 09 04.12  22.6r 15VL165   568  C~2lVb      
2015 11  10.51713  03 14 29.573  +15 07 25.35  22.9w 15VL165   568  C~2lVb      
2015 11  10.54648  03 14 29.396  +15 07 24.39  22.9w 15VL165   568  C~2lVb      
2015 11  17.41043  03 13 48.266  +15 03 46.67  22.9w 15VL165   568  C~2lVb      
2015 12  06.37266  03 11 59.281  +14 54 25.07  22.9w 15VL165   568  C~2lVb      
2015 12  06.52203  03 11 58.456  +14 54 21.06  23.1w 15VL165   568  C~2lVb      
2015 12  13.30706  03 11 23.398  +14 51 23.25  23.1w 15VL165   568  C~2lVb      
2015 12  13.36559  03 11 23.107  +14 51 21.79  23.0w 15VL165   568  C~2lVb      
2016 01  01.36029  03 10 03.686  +14 44 38.96  23.1w 15VL165   568  C~2lVb      
2016 01  07.30705  03 09 45.819  +14 43 06.15  23.1w 15VL165   568  C~2lVb      
2016 02  04.34036  03 09 16.499  +14 39 52.83  23.1w 15VL165   568  C~2lVb      
2016 02  11.22942  03 09 24.044  +14 40 07.92  23.2w 15VL165   568  C~2lVb      
2016 09  25.60907  03 26 45.469  +15 13 14.01  23.1w 15VL165   568  C~2lVb      
2016 10  10.54805  03 25 46.577  +15 06 28.18  23.1w 15VL165   568  C~2lVb      
2016 10  10.59680  03 25 46.347  +15 06 26.82  23.0w 15VL165   568  C~2lVb      
2016 11  02.50837  03 23 44.929  +14 54 46.17        15VL165   568  C~2lVb      
2016 11  04.48449  03 23 33.341  +14 53 44.05  22.9w 15VL165   568  C~2lVb      
2016 12  25.28594  03 18 53.955  +14 30 49.03        15VL165   568  C~2lVb      
2016 12  28.43907  03 18 41.375  +14 29 51.06        15VL165   568  C~2lVb      
2017 01  27.29257  03 17 34.427  +14 24 39.69  23.2w 15VL165   568  C~2lVb      
2017 09  15.55206  03 35 37.682  +14 59 17.21  23.1w 15VL165   568  C~2lVb      
2017 09  20.60085  03 35 26.456  +14 57 22.78  23.1w 15VL165   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     0.00       0.00    -0.02
     2   0.0003    -10.05     0.02      -0.72     0.00
     3   0.0006    -20.59     0.03      -1.56    -0.04
     4   0.0055   -183.03     0.04     -14.70    -0.03
     5   0.0167   -552.98    -0.06     -43.73     0.02
     6   0.7319  11879.02     0.06   -1831.23     0.01
     7   0.8031  11876.40    -0.01   -2150.85     0.08
     8   0.8193  11711.31     0.01   -2222.00     0.01
     9   0.8875  10412.24    -0.03   -2506.52     0.01
    10   0.8903  10341.55    -0.02   -2517.32     0.01
    11   0.8904  10337.30    -0.02   -2517.94    -0.02
    12   0.9721   7845.33    -0.02   -2800.85    -0.09
    13   0.9723   7841.42    -0.02   -2801.15    -0.07
    14   0.9724   7837.46    -0.04   -2801.48    -0.08
    15   0.9808   7553.62     0.02   -2826.10     0.03
    16   0.9809   7550.89     0.04   -2826.34     0.01
    17   0.9997   6917.99     0.02   -2878.24    -0.00
    18   1.0516   5244.65    -0.03   -2998.35     0.02
    19   1.0520   5232.04    -0.12   -2999.01     0.15
    20   1.0706   4694.39    -0.06   -3034.10     0.01
    21   1.0708   4689.93     0.02   -3034.37    -0.01
    22   1.1228   3471.63     0.02   -3112.43    -0.01
    23   1.1390   3196.91     0.01   -3131.83    -0.03
    24   1.2158   2734.93     0.03   -3202.94     0.03
    25   1.2347   2844.45     0.05   -3218.04     0.03
    26   1.8572  17982.24     0.00   -5249.30     0.03
    27   1.8981  17048.12     0.03   -5427.24    -0.03
    28   1.8982  17044.53     0.02   -5427.72     0.04
    29   1.9610  15153.37     0.03   -5658.56    -0.00
    30   1.9664  14974.12     0.03   -5675.73    -0.01
    31   2.1054  10685.10    -0.06   -5957.59    -0.02
    32   2.1141  10493.04     0.04   -5965.89     0.01
    33   2.1958   9470.26     0.02   -6012.02    -0.02
    34   2.8290  25335.49     0.00   -7988.39    -0.01
    35   2.8428  25147.24    -0.05   -8060.34    -0.02

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.

15VL165    quality flag:3

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

axisobj        39.823    39.831    39.815
ecceobj         0.165     0.165     0.165
incobj         22.618    22.618    22.619
qmin           32.650    32.609    32.648
qmax           46.619    46.710    46.700
amean          39.456    39.456    39.456
amin           39.091    39.085    39.098
amax           39.849    39.852    39.852
emean           0.134     0.134     0.133
emin            0.100     0.099     0.099
emax            0.172     0.173     0.173
imean          23.950    23.949    23.960
imin           23.291    23.297    23.277
imax           24.675    24.638    24.677
excite_mean     0.428     0.428     0.428
fracstop        1.000     1.000     1.000
cjmean          2.836     2.836     2.836

libcent 0       179.5     178.5     179.5
libamp  0        73.6      76.1      72.6
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       179.5     178.2     180.2
kozaiamp        180.0     180.0     180.0