Orbit Fit and Astrometric record for 15VL166

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: 15VL166   
# Created Sat Apr 20 01:10:13 2019
# Orbit generated from Bernstein formalism
# Fitting   30 observations of   30
# Arc:   3.08y
# First observation: 2014/11/17
#  Last observation: 2017/12/16
Preliminary a, adot, b, bdot, g, gdot:
  -0.000247   0.038404   0.000015  -0.003185   0.031243   0.000000
# Chi-squared of fit:    15.17 DOF:   54 RMS:  0.13
# Min/Max residuals:    -0.31    0.39
# Exact a, adot, b, bdot, g, gdot:
  1.965211E-05  3.820469E-02 -1.028989E-06 -3.169552E-03  3.098790E-02 -4.410873E-03
# Covariance matrix:
  1.0329E-12 -1.3018E-12 -5.6721E-14  9.2556E-14 -4.8902E-13 -9.6957E-12
 -1.3018E-12  1.8851E-12  8.9669E-14 -1.4582E-13  7.2582E-13  1.5314E-11
 -5.6721E-14  8.9669E-14  3.1473E-13 -1.8479E-13  3.5145E-14  7.8224E-13
  9.2556E-14 -1.4582E-13 -1.8479E-13  1.3250E-13 -5.8486E-14 -1.2689E-12
 -4.8902E-13  7.2582E-13  3.5145E-14 -5.8486E-14  4.0996E-13  6.0374E-12
 -9.6957E-12  1.5314E-11  7.8224E-13 -1.2689E-12  6.0374E-12  1.3352E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -2.826266   46.473983   -0.141523   -0.048123   -0.978069  2456979.009918
# Heliocentric elements and errors
Epoch:              2456970.5000  =  2014/11/09
Mean Anomaly:          346.89649 +/-     0.029
Argument of Peri:      236.82733 +/-     0.064
Long of Asc Node:      196.63915 +/-     0.003
Inclination:             5.46005 +/-     0.000
Eccentricity:         0.32442658 +/-    0.0002
Semi-Major Axis:     47.93573845 +/-    0.0066
Time of Perihelion: 2461382.8764 +/-       9.8
Perihelion:          32.38411076 +/-    0.0089
Aphelion:            63.48736614 +/-    0.0116
Period (y)              331.8924 +/-      0.07
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           22.76591489 +/-    0.0004
Ecliptic Y           24.17876064 +/-    0.0005
Ecliptic Z           -1.59125318 +/-    0.0000
Ecliptic XDOT        -0.00272927 +/-    0.0000
Ecliptic YDOT         0.00202743 +/-    0.0000
Ecliptic ZDOT        -0.00026038 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   33.24802902 +/-    0.0005
Geocenter to KBO     32.27066023 +/-    0.0007
# Hcoef: 10.21

The following table shows the complete astrometric record for 15VL166. 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 (15VL166) followed by the observatory code and reference code for the source of the astrometry.

2014 11  17.50914  02 59 21.803  +14 03 11.64  25.0r 15VL166   568  C~2lVe      
2015 09  12.52133  03 13 26.343  +14 54 50.32  25.5w 15VL166   568  C~2lVe      
2015 10  07.45992  03 12 03.555  +14 46 49.37  25.6w 15VL166   568  C~2lVe      
2015 10  08.46335  03 11 59.061  +14 46 26.13  25.6w 15VL166   568  C~2lVe      
2015 10  08.52236  03 11 58.777  +14 46 24.95  25.6w 15VL166   568  C~2lVe      
2015 11  07.36952  03 09 18.512  +14 33 45.79  25.4r 15VL166   568  C~2lVe      
2015 11  07.41164  03 09 18.265  +14 33 44.72  24.9r 15VL166   568  C~2lVe      
2015 11  07.45387  03 09 18.014  +14 33 43.55  25.0r 15VL166   568  C~2lVe      
2015 11  10.54061  03 08 59.751  +14 32 23.24  25.1w 15VL166   568  C~2lVe      
2015 11  17.38710  03 08 19.258  +14 29 27.17  25.3w 15VL166   568  C~2lVe      
2015 11  17.43381  03 08 18.973  +14 29 25.96  25.3w 15VL166   568  C~2lVe      
2015 12  06.39596  03 06 32.163  +14 22 04.17  25.3w 15VL166   568  C~2lVe      
2016 01  01.38342  03 04 41.100  +14 15 13.90  26.2w 15VL166   568  C~2lVe      
2016 01  02.34977  03 04 38.132  +14 15 04.12  25.3w 15VL166   568  C~2lVe      
2016 01  07.33018  03 04 24.448  +14 14 22.89  26.5w 15VL166   568  C~2lVe      
2016 02  05.27611  03 04 02.291  +14 14 40.08  25.5w 15VL166   568  C~2lVe      
2016 09  07.56785  03 22 28.309  +15 19 42.33  25.3w 15VL166   568  C~2lVe      
2016 09  25.60501  03 21 45.911  +15 14 58.34  25.5w 15VL166   568  C~2lVe      
2016 09  27.50655  03 21 39.474  +15 14 22.07  25.5w 15VL166   568  C~2lVe      
2016 10  10.44325  03 20 46.826  +15 09 47.09  25.2w 15VL166   568  C~2lVe      
2016 10  10.50202  03 20 46.552  +15 09 45.87  25.6w 15VL166   568  C~2lVe      
2016 10  10.51973  03 20 46.471  +15 09 45.35  26.3w 15VL166   568  C~2lVe      
2016 11  04.41826  03 18 33.247  +14 59 33.40  25.5w 15VL166   568  C~2lVe      
2016 12  24.31885  03 14 01.766  +14 41 52.07  25.5w 15VL166   568  C~2lVe      
2016 12  29.38526  03 13 42.343  +14 40 48.81  26.0w 15VL166   568  C~2lVe      
2017 01  02.39267  03 13 28.795  +14 40 07.28  26.0w 15VL166   568  C~2lVe      
2017 01  02.42106  03 13 28.709  +14 40 07.17  24.9w 15VL166   568  C~2lVe      
2017 01  26.30729  03 12 44.948  +14 38 44.75  25.2w 15VL166   568  C~2lVe      
2017 01  26.31474  03 12 44.935  +14 38 44.60  25.0w 15VL166   568  C~2lVe      
2017 12  16.34460  03 23 41.081  +15 08 01.16        15VL166   568  C~2lVe      

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    -0.12
  2   0.8187  12660.32    -0.18    -395.48    -0.05
  3   0.8869  11370.56     0.03    -536.79     0.13
  4   0.8897  11301.32     0.13    -541.63     0.07
  5   0.8898  11297.02     0.04    -541.66     0.30
  6   0.9716   8846.87    -0.02    -642.98    -0.04
  7   0.9717   8843.12     0.07    -643.04    -0.04
  8   0.9718   8839.29     0.09    -643.17    -0.11
  9   0.9802   8561.79     0.02    -648.24     0.26
 10   0.9990   7947.07     0.01    -657.20    -0.00
 11   0.9991   7942.75    -0.06    -657.24    -0.01
 12   1.0510   6327.52    -0.27    -656.75     0.09
 13   1.1222   4661.54     0.06    -605.50    -0.06
 14   1.1248   4617.35    -0.17    -602.95    -0.31
 15   1.1385   4414.66    -0.04    -587.42    -0.12
 16   1.2177   4109.80     0.39    -481.51    -0.04
 17   1.8071  20677.71     0.08   -1020.88    -0.02
 18   1.8565  20005.27    -0.15   -1137.26    -0.00
 19   1.8617  19904.97    -0.03   -1148.23     0.17
 20   1.8972  19090.45    -0.01   -1216.37     0.06
 21   1.8973  19086.26     0.06   -1216.52     0.16
 22   1.8974  19084.99     0.07   -1216.72     0.04
 23   1.9655  17047.04     0.10   -1303.76     0.02
 24   2.1021  12948.46     0.06   -1284.50    -0.01
 25   2.1160  12658.87    -0.31   -1270.05    -0.10
 26   2.1270  12457.58    -0.07   -1257.40    -0.13
 27   2.1271  12456.34     0.07   -1257.17     0.00
 28   2.1925  11820.22     0.11   -1166.05    -0.02
 29   2.1925  11820.00    -0.07   -1166.15    -0.15
 30   3.0796  21524.33     0.02   -1974.66     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.

15VL166    quality flag:3

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

axisobj        48.377    48.388    48.366
ecceobj         0.329     0.329     0.328
incobj          5.440     5.440     5.440
qmin           31.984    31.985    31.985
qmax           64.358    64.380    64.250
amean          47.797    47.797    47.797
amin           47.294    47.299    47.313
amax           48.420    48.438    48.424
emean           0.312     0.312     0.311
emin            0.294     0.294     0.294
emax            0.329     0.329     0.328
imean           6.680     6.674     6.690
imin            5.637     5.637     5.637
imax            7.485     7.468     7.547
excite_mean     0.333     0.333     0.333
fracstop        1.000     1.000     1.000
cjmean          3.008     3.007     3.008

libcent 0        70.8      71.2      70.6
libamp  0        13.3      15.3      11.0
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       173.9     178.0     171.1
kozaiamp        179.9     180.0     180.0