Orbit Fit and Astrometric record for 15VG166

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: 15VG166   
# Created Mon Apr 22 01:10:12 2019
# Orbit generated from Bernstein formalism
# Fitting   35 observations of   35
# Arc:   3.08y
# First observation: 2014/11/17
#  Last observation: 2017/12/16
Preliminary a, adot, b, bdot, g, gdot:
   0.000034   0.027888   0.000010   0.008598   0.026401   0.000000
# Chi-squared of fit:     9.24 DOF:   64 RMS:  0.09
# Min/Max residuals:    -0.22    0.19
# Exact a, adot, b, bdot, g, gdot:
  1.675125E-05  2.819996E-02  4.500812E-06  8.699612E-03  2.669094E-02  2.200622E-03
# Covariance matrix:
  2.4436E-13 -2.6198E-13  2.3258E-14 -5.2800E-14 -1.0413E-13 -2.2121E-12
 -2.6198E-13  4.4395E-13 -5.0729E-14  1.1516E-13  2.2678E-13  4.8249E-12
  2.3258E-14 -5.0729E-14  1.7091E-13 -1.0236E-13 -3.0687E-14 -6.4158E-13
 -5.2800E-14  1.1516E-13 -1.0236E-13  9.7154E-14  6.9125E-14  1.4564E-12
 -1.0413E-13  2.2678E-13 -3.0687E-14  6.9125E-14  2.5884E-13  2.8902E-12
 -2.2121E-12  4.8249E-12 -6.4158E-13  1.4564E-12  2.8902E-12  6.1017E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.986103   48.232922   -0.107330   -0.016782   -0.983494  2456978.777218
# Heliocentric elements and errors
Epoch:              2456970.5000  =  2014/11/09
Mean Anomaly:           16.26689 +/-     0.047
Argument of Peri:      331.50089 +/-     0.077
Long of Asc Node:       51.50769 +/-     0.000
Inclination:            17.17600 +/-     0.000
Eccentricity:         0.21012971 +/-    0.0001
Semi-Major Axis:     47.86985809 +/-    0.0042
Time of Perihelion: 2451504.1979 +/-      15.8
Perihelion:          37.81097875 +/-    0.0076
Aphelion:            57.92873743 +/-    0.0086
Period (y)              331.2085 +/-      0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           25.52451488 +/-    0.0005
Ecliptic Y           28.74678160 +/-    0.0005
Ecliptic Z           -0.64462919 +/-    0.0000
Ecliptic XDOT        -0.00200121 +/-    0.0000
Ecliptic YDOT         0.00210163 +/-    0.0000
Ecliptic ZDOT         0.00088846 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   38.44858721 +/-    0.0005
Geocenter to KBO     37.46589364 +/-    0.0007
# Hcoef:  9.12

The following table shows the complete astrometric record for 15VG166. 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 (15VG166) followed by the observatory code and reference code for the source of the astrometry.

2014 11  17.27644  03 04 13.812  +16 18 39.80  24.4r 15VG166   568  C~2lVe      
2014 11  17.38513  03 04 13.221  +16 18 37.87  24.8r 15VG166   568  C~2lVe      
2014 11  17.49897  03 04 12.603  +16 18 35.87  25.1r 15VG166   568  C~2lVe      
2014 11  19.28749  03 04 03.017  +16 18 05.72  24.5r 15VG166   568  C~2lVe      
2014 11  23.39103  03 03 41.215  +16 16 57.74  25.0r 15VG166   568  C~2lVe      
2015 08  11.57225  03 15 09.238  +17 26 12.02  25.4w 15VG166   568  C~2lVe      
2015 09  12.50905  03 14 54.845  +17 27 25.33  24.7w 15VG166   568  C~2lVe      
2015 10  07.43408  03 13 36.090  +17 24 05.89  25.3w 15VG166   568  C~2lVe      
2015 11  07.35377  03 11 03.754  +17 16 31.81  24.9r 15VG166   568  C~2lVe      
2015 11  07.39585  03 11 03.526  +17 16 31.02  24.7r 15VG166   568  C~2lVe      
2015 11  07.43803  03 11 03.298  +17 16 30.41  25.0r 15VG166   568  C~2lVe      
2015 11  10.52298  03 10 46.510  +17 15 39.26  24.7w 15VG166   568  C~2lVe      
2015 12  06.37850  03 08 30.198  +17 08 48.95  24.8w 15VG166   568  C~2lVe      
2015 12  13.31287  03 07 57.661  +17 07 15.31  24.7w 15VG166   568  C~2lVe      
2015 12  13.37141  03 07 57.388  +17 07 14.52  25.2w 15VG166   568  C~2lVe      
2016 01  01.36607  03 06 44.890  +17 04 05.99  25.0w 15VG166   568  C~2lVe      
2016 01  07.31283  03 06 28.357  +17 03 31.88  25.5w 15VG166   568  C~2lVe      
2016 02  04.28927  03 05 58.379  +17 04 07.24  25.5w 15VG166   568  C~2lVe      
2016 02  10.27908  03 06 02.868  +17 04 58.77  25.0w 15VG166   568  C~2lVe      
2016 09  06.61138  03 20 55.972  +18 20 23.90        15VG166   568  C~2lVe      
2016 09  26.60062  03 20 08.422  +18 19 02.93  24.8w 15VG166   568  C~2lVe      
2016 10  10.40808  03 19 15.657  +18 16 52.50  25.4w 15VG166   568  C~2lVe      
2016 10  10.46643  03 19 15.394  +18 16 51.76  25.3w 15VG166   568  C~2lVe      
2016 11  02.53154  03 17 21.993  +18 11 36.33  24.6w 15VG166   568  C~2lVe      
2016 11  02.53733  03 17 21.944  +18 11 36.28  25.2w 15VG166   568  C~2lVe      
2016 11  04.40663  03 17 11.930  +18 11 07.26  25.0w 15VG166   568  C~2lVe      
2016 11  04.41248  03 17 11.893  +18 11 07.19  24.8w 15VG166   568  C~2lVe      
2016 12  24.30698  03 13 02.186  +17 59 10.68  25.1w 15VG166   568  C~2lVe      
2016 12  29.38063  03 12 43.900  +17 58 24.17  25.0w 15VG166   568  C~2lVe      
2017 01  02.38784  03 12 31.023  +17 57 53.20  25.2w 15VG166   568  C~2lVe      
2017 01  02.40920  03 12 30.967  +17 57 53.08  25.1w 15VG166   568  C~2lVe      
2017 01  26.29981  03 11 46.332  +17 56 53.21  24.9w 15VG166   568  C~2lVe      
2017 09  15.60695  03 26 34.044  +19 12 01.88  25.3w 15VG166   568  C~2lVe      
2017 09  22.59291  03 26 16.740  +19 11 38.08  25.0w 15VG166   568  C~2lVe      
2017 12  16.36391  03 19 31.145  +18 53 54.99  25.2w 15VG166   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    -0.01       0.00     0.13
  2   0.0003     -8.71     0.00       0.49     0.02
  3   0.0006    -17.81     0.05       1.03    -0.06
  4   0.0055   -158.78    -0.05      10.17    -0.06
  5   0.0167   -479.24     0.04      31.63    -0.12
  6   0.7318  10160.18    -0.10    1368.03     0.19
  7   0.8193   9980.32     0.11    1493.03     0.16
  8   0.8875   8838.16     0.07    1597.95     0.09
  9   0.9721   6611.60    -0.02    1740.72    -0.01
 10   0.9723   6608.23     0.01    1740.83    -0.12
 11   0.9724   6604.92     0.09    1741.11    -0.06
 12   0.9808   6359.29    -0.14    1756.25    -0.00
 13   1.0516   4366.36    -0.19    1887.38     0.09
 14   1.0706   3891.85    -0.02    1923.73     0.01
 15   1.0708   3887.86    -0.09    1924.03    -0.01
 16   1.1228   2836.06    -0.05    2025.61    -0.01
 17   1.1390   2598.63     0.13    2057.56    -0.22
 18   1.2156   2194.77     0.01    2209.21     0.05
 19   1.2320   2270.81     0.09    2241.15    -0.13
 20   1.8052  15806.65    -0.06    3233.16    -0.11
 21   1.8599  15127.55    -0.02    3327.85    -0.15
 22   1.8977  14363.86     0.11    3394.44     0.05
 23   1.8979  14360.03     0.00    3394.69    -0.01
 24   1.9610  12710.58     0.04    3506.95    -0.01
 25   1.9610  12709.89    -0.19    3507.08     0.10
 26   1.9661  12563.99     0.05    3516.08    -0.00
 27   1.9661  12563.46    -0.01    3516.15     0.04
 28   2.1028   8929.33     0.06    3758.30     0.02
 29   2.1166   8664.93    -0.12    3782.61     0.13
 30   2.1276   8479.23    -0.03    3801.52     0.03
 31   2.1277   8478.42     0.13    3801.62     0.03
 32   2.1931   7847.51     0.11    3913.40     0.05
 33   2.8291  21279.27    -0.00    5038.21     0.03
 34   2.8482  21033.29     0.12    5075.74     0.05
 35   3.0803  15153.54    -0.14    5492.68    -0.17

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.

15VG166    quality flag:3

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

axisobj        48.340    48.355    48.325
ecceobj         0.218     0.219     0.218
incobj         17.134    17.134    17.134
qmin           35.080    34.886    35.177
qmax           61.222    61.375    61.066
amean          47.798    47.797    47.798
amin           47.321    47.304    47.336
amax           48.368    48.392    48.353
emean           0.233     0.234     0.232
emin            0.199     0.199     0.199
emax            0.266     0.270     0.263
imean          15.306    15.277    15.310
imin           14.342    14.210    14.408
imax           16.396    16.394    16.401
excite_mean     0.352     0.353     0.352
fracstop        1.000     1.000     1.000
cjmean          2.993     2.993     2.994

libcent 0        77.0      77.4      76.7
libamp  0        21.6      24.8      18.0
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       184.9     190.5     177.3
kozaiamp        179.9     180.0     180.0