Orbit Fit and Astrometric record for 15VB166

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: 15VB166   
# Created Thu Apr 18 01:10:38 2019
# Orbit generated from Bernstein formalism
# Fitting   38 observations of   38
# Arc:   2.09y
# First observation: 2015/08/20
#  Last observation: 2017/09/22
Preliminary a, adot, b, bdot, g, gdot:
  -0.000125   0.040619  -0.000002   0.000472   0.031649   0.000000
# Chi-squared of fit:     4.30 DOF:   70 RMS:  0.06
# Min/Max residuals:    -0.19    0.15
# Exact a, adot, b, bdot, g, gdot:
  1.981140E-05  3.975107E-02  2.340467E-07  4.625932E-04  3.115827E-02 -1.963556E-04
# Covariance matrix:
  1.6425E-13 -5.8225E-14  7.6265E-16  2.5176E-16  9.3898E-14  5.0037E-13
 -5.8225E-14  4.1709E-13  2.3649E-16  3.4124E-15  1.6376E-13  5.9821E-12
  7.6265E-16  2.3649E-16  8.9511E-14 -7.6230E-14  9.8270E-16  6.1297E-15
  2.5176E-16  3.4124E-15 -7.6230E-14  1.1100E-13  1.8837E-15  6.6784E-14
  9.3898E-14  1.6376E-13  9.8270E-16  1.8837E-15  1.8396E-13  3.3697E-12
  5.0037E-13  5.9821E-12  6.1297E-15  6.6784E-14  3.3697E-12  1.1719E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.827407   53.713363    1.012798   -0.000742   -0.060478  2457255.045359
# Heliocentric elements and errors
Epoch:              2457250.5000  =  2015/08/16
Mean Anomaly:          355.71838 +/-     0.030
Argument of Peri:      316.71782 +/-     0.066
Long of Asc Node:      104.07648 +/-     0.020
Inclination:             1.04517 +/-     0.000
Eccentricity:         0.32686222 +/-    0.0001
Semi-Major Axis:     47.64691669 +/-    0.0037
Time of Perihelion: 2458679.2500 +/-      10.0
Perihelion:          32.07293967 +/-    0.0037
Aphelion:            63.22089372 +/-    0.0057
Period (y)              328.8974 +/-      0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           19.84030265 +/-    0.0003
Ecliptic Y           25.31657103 +/-    0.0004
Ecliptic Z           -0.46342361 +/-    0.0000
Ecliptic XDOT        -0.00282736 +/-    0.0000
Ecliptic YDOT         0.00204738 +/-    0.0000
Ecliptic ZDOT         0.00004095 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   32.16801422 +/-    0.0003
Geocenter to KBO     32.09420370 +/-    0.0004
# Hcoef:  8.79

The following table shows the complete astrometric record for 15VB166. 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 (15VB166) followed by the observatory code and reference code for the source of the astrometry.

2015 08  20.54457  03 26 11.422  +17 53 59.10  24.1w 15VB166   568  C~2lVd      
2015 08  20.55007  03 26 11.430  +17 53 59.07  24.1w 15VB166   568  C~2lVd      
2015 09  07.60044  03 26 09.764  +17 53 29.20  23.8w 15VB166   568  C~2lVd      
2015 09  12.44733  03 26 02.520  +17 52 56.64  24.0w 15VB166   568  C~2lVd      
2015 10  07.49766  03 24 43.199  +17 47 40.25  24.0w 15VB166   568  C~2lVd      
2015 10  07.55607  03 24 42.938  +17 47 39.25  24.0w 15VB166   568  C~2lVd      
2015 10  09.53675  03 24 34.007  +17 47 04.95  24.0w 15VB166   568  C~2lVd      
2015 11  06.33360  03 22 01.202  +17 37 27.25  23.6r 15VB166   568  C~2lVd      
2015 11  06.39716  03 22 00.818  +17 37 25.88  23.6r 15VB166   568  C~2lVd      
2015 11  06.40423  03 22 00.758  +17 37 25.55  23.5r 15VB166   568  C~2lVd      
2015 11  06.47375  03 22 00.333  +17 37 24.16  23.7r 15VB166   568  C~2lVd      
2015 11  07.49015  03 21 54.094  +17 37 00.77  23.8w 15VB166   568  C~2lVd      
2015 11  17.47136  03 20 52.148  +17 33 10.38  23.8w 15VB166   568  C~2lVd      
2015 11  17.55969  03 20 51.577  +17 33 08.23  23.7w 15VB166   568  C~2lVd      
2015 12  06.33759  03 18 58.620  +17 26 12.76  24.0w 15VB166   568  C~2lVd      
2015 12  06.47504  03 18 57.834  +17 26 09.98  23.9w 15VB166   568  C~2lVd      
2015 12  31.35875  03 16 58.967  +17 19 05.88  24.0w 15VB166   568  C~2lVd      
2016 01  07.38812  03 16 35.665  +17 17 47.21  24.1w 15VB166   568  C~2lVd      
2016 01  07.42286  03 16 35.548  +17 17 47.16  24.1w 15VB166   568  C~2lVd      
2016 01  08.24465  03 16 33.207  +17 17 39.28  24.0w 15VB166   568  C~2lVd      
2016 02  04.37827  03 16 01.369  +17 16 25.63  24.0w 15VB166   568  C~2lVd      
2016 02  11.24103  03 16 08.315  +17 17 05.53  24.2w 15VB166   568  C~2lVd      
2016 09  07.61412  03 35 30.748  +18 28 15.14        15VB166   568  C~2lVd      
2016 09  25.62123  03 34 52.949  +18 25 44.90  23.9w 15VB166   568  C~2lVd      
2016 09  27.53935  03 34 46.770  +18 25 21.59  24.0w 15VB166   568  C~2lVd      
2016 10  09.53365  03 33 59.572  +18 22 28.13  24.0w 15VB166   568  C~2lVd      
2016 10  09.60571  03 33 59.238  +18 22 26.90  24.1w 15VB166   568  C~2lVd      
2016 10  10.56080  03 33 54.896  +18 22 11.12  24.0w 15VB166   568  C~2lVd      
2016 10  10.60927  03 33 54.668  +18 22 10.30  24.0w 15VB166   568  C~2lVd      
2016 10  28.47058  03 32 20.932  +18 16 34.61  23.9w 15VB166   568  C~2lVd      
2016 10  28.49380  03 32 20.791  +18 16 34.17  24.0w 15VB166   568  C~2lVd      
2016 10  29.53251  03 32 14.731  +18 16 12.65  23.9w 15VB166   568  C~2lVd      
2016 11  02.58549  03 31 50.658  +18 14 47.33  23.8w 15VB166   568  C~2lVd      
2016 12  24.34518  03 26 49.103  +17 57 22.74  24.0w 15VB166   568  C~2lVd      
2017 01  27.31949  03 25 16.413  +17 52 39.89  24.0w 15VB166   568  C~2lVd      
2017 01  27.32464  03 25 16.410  +17 52 39.89  24.1w 15VB166   568  C~2lVd      
2017 09  15.62735  03 44 46.873  +19 00 41.55  24.2w 15VB166   568  C~2lVd      
2017 09  22.60498  03 44 32.091  +18 59 46.53        15VB166   568  C~2lVd      

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     0.07       0.00     0.00
  2   0.0000      0.10     0.10      -0.06    -0.05
  3   0.0494    -30.33    -0.02     -23.12     0.01
  4   0.0627   -138.58    -0.02     -29.07    -0.01
  5   0.1313  -1314.30    -0.01     -54.15    -0.03
  6   0.1314  -1318.16     0.04     -54.19    -0.05
  7   0.1369  -1450.25    -0.03     -55.60     0.04
  8   0.2130  -3709.25    -0.09     -66.44     0.03
  9   0.2131  -3714.90     0.09     -66.38     0.05
 10   0.2132  -3715.82    -0.17     -66.48    -0.05
 11   0.2134  -3722.05     0.00     -66.29     0.11
 12   0.2161  -3814.29    -0.02     -66.37     0.01
 13   0.2435  -4729.93     0.07     -64.62     0.04
 14   0.2437  -4738.37    -0.14     -64.62     0.01
 15   0.2951  -6408.10    -0.04     -53.52     0.02
 16   0.2955  -6419.70     0.09     -53.32     0.07
 17   0.3636  -8175.34     0.08     -24.21    -0.08
 18   0.3829  -8518.59     0.06     -13.62    -0.19
 19   0.3830  -8520.22    -0.03     -13.24     0.15
 20   0.3852  -8554.71     0.03     -12.14    -0.02
 21   0.4595  -9015.01    -0.11      35.36     0.00
 22   0.4783  -8908.37     0.03      48.00    -0.01
 23   1.0515   8235.70    -0.01      72.24     0.03
 24   1.1008   7676.77    -0.08      52.87     0.05
 25   1.1061   7585.70     0.01      50.96    -0.04
 26   1.1389   6891.09     0.08      41.35     0.00
 27   1.1391   6886.18     0.05      41.28    -0.04
 28   1.1417   6822.32    -0.03      40.61    -0.05
 29   1.1419   6818.97    -0.04      40.58    -0.06
 30   1.1908   5441.45     0.01      32.57    -0.01
 31   1.1908   5439.39    -0.02      32.62     0.04
 32   1.1937   5350.37    -0.05      32.39     0.01
 33   1.2048   4996.78     0.01      31.75    -0.07
 34   1.3465    571.41     0.04      64.51    -0.05
 35   1.4395   -780.36    -0.00     117.99     0.02
 36   1.4395   -780.40     0.01     118.00     0.02
 37   2.0728  16401.04    -0.01     160.08     0.02
 38   2.0919  16183.06     0.02     153.08     0.05

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.

15VB166    quality flag:3

Type:           2:1E      2:1E      2:1E

axisobj        48.261    48.277    48.245
ecceobj         0.334     0.335     0.334
incobj          1.046     1.046     1.045
qmin           31.583    31.552    31.588
qmax           64.995    64.960    65.050
amean          47.797    47.797    47.797
amin           47.236    47.285    47.248
amax           48.531    48.485    48.519
emean           0.326     0.326     0.326
emin            0.313     0.314     0.314
emax            0.340     0.340     0.341
imean           0.435     0.421     0.451
imin            0.179     0.148     0.261
imax            0.566     0.596     0.569
excite_mean     0.326     0.326     0.326
fracstop        1.000     1.000     1.000
cjmean          3.012     3.012     3.012

libcent 0        73.8      71.1      72.8
libamp  0        28.1      18.5      27.7
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       189.4     186.5     189.6
kozaiamp        179.9     179.9     180.0