Orbit Fit and Astrometric record for 15VN168

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: 15VN168   
# Created Sat Apr 20 01:10:14 2019
# Orbit generated from Bernstein formalism
# Fitting   37 observations of   38
# Arc:   3.08y
# First observation: 2014/11/17
#  Last observation: 2017/12/16
Preliminary a, adot, b, bdot, g, gdot:
   0.000128   0.013086  -0.000042  -0.004819   0.017658   0.000000
# Chi-squared of fit:     8.55 DOF:   68 RMS:  0.08
# Min/Max residuals:    -0.27    0.18
# Exact a, adot, b, bdot, g, gdot:
  1.126590E-05  1.337421E-02 -3.515225E-06 -4.926495E-03  1.792947E-02  6.125893E-03
# Covariance matrix:
  2.8368E-13 -3.1501E-13 -4.2767E-14  8.2596E-14 -1.6717E-13 -5.7828E-12
 -3.1501E-13  4.7794E-13  7.7850E-14 -1.5019E-13  2.6912E-13  1.0519E-11
 -4.2767E-14  7.7850E-14  1.6932E-13 -1.1605E-13  4.8952E-14  1.9992E-12
  8.2596E-14 -1.5019E-13 -1.1605E-13  1.2230E-13 -9.4951E-14 -3.8556E-12
 -1.6717E-13  2.6912E-13  4.8952E-14 -9.4951E-14  2.8075E-13  6.6368E-12
 -5.7828E-12  1.0519E-11  1.9992E-12 -3.8556E-12  6.6368E-12  2.7009E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.493087   48.966857   -0.094810   -0.008329   -0.984888  2456978.782278
# Heliocentric elements and errors
Epoch:              2456970.5000  =  2014/11/09
Mean Anomaly:           56.80539 +/-     0.109
Argument of Peri:       77.99187 +/-     0.039
Long of Asc Node:      227.75137 +/-     0.000
Inclination:            20.24358 +/-     0.001
Eccentricity:         0.39981826 +/-    0.0010
Semi-Major Axis:     61.29363277 +/-    0.0591
Time of Perihelion: 2429313.2794 +/-      35.3
Perihelion:          36.78731891 +/-    0.0711
Aphelion:            85.79994663 +/-    0.1031
Period (y)              479.8784 +/-      0.69
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           37.18604193 +/-    0.0011
Ecliptic Y           42.87721694 +/-    0.0013
Ecliptic Z           -0.48019581 +/-    0.0000
Ecliptic XDOT        -0.00093498 +/-    0.0000
Ecliptic YDOT         0.00203648 +/-    0.0000
Ecliptic ZDOT        -0.00076020 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   56.75815391 +/-    0.0012
Geocenter to KBO     55.77410896 +/-    0.0016
# Hcoef:  7.52

The following table shows the complete astrometric record for 15VN168. 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 (15VN168) followed by the observatory code and reference code for the source of the astrometry.

2014 11  17.28150  03 06 36.675  +16 59 11.83  24.3r 15VN168   568  C~2lVn      
2014 11  17.39021  03 06 36.261  +16 59 10.07  24.8r 15VN168   568  C~2lVn      
2014 11  17.50402  03 06 35.816  +16 59 07.93  25.2r 15VN168   568  C~2lVn      
2014 11  23.39737  03 06 14.028  +16 57 22.73  25.3r 15VN168   568  C~2lVn      
2015 08  11.59273  03 13 32.280  +17 14 51.57  25.0w 15VN168   568  C~2lVn      
2015 09  06.62350  03 13 26.205  +17 12 54.57  25.1w 15VN168   568  C~2lVn      
2015 09  12.51312  03 13 18.440  +17 12 03.33  25.5w 15VN168   568  C~2lVn      
2015 10  07.43992  03 12 22.632  +17 06 57.57  25.2w 15VN168   568  C~2lVn      
2015 10  07.44703  03 12 22.605  +17 06 57.26  25.0w 15VN168   568  C~2lVn      
2015 10  08.45165  03 12 19.687  +17 06 42.34  25.2w 15VN168   568  C~2lVn      
2015 10  08.51072  03 12 19.510  +17 06 41.40  25.2w 15VN168   568  C~2lVn      
2015 11  07.35903  03 10 37.520  +16 58 22.95  24.8r 15VN168   568  C~2lVn      
2015 11  07.40112  03 10 37.353  +16 58 22.19  24.8r 15VN168   568  C~2lVn      
2015 11  07.44330  03 10 37.201  +16 58 21.49  24.9r 15VN168   568  C~2lVn      
2015 11  10.52886  03 10 25.674  +16 57 26.54  25.6w 15VN168   568  C~2lVn      
2015 11  17.37547  03 10 00.109  +16 55 24.97  25.1w 15VN168   568  C~2lVn      
2015 11  17.42215  03 09 59.935  +16 55 24.16  24.7w 15VN168   568  C~2lVn      
2015 12  06.38432  03 08 52.067  +16 50 02.02  24.8w 15VN168   568  C~2lVn      
2015 12  13.31874  03 08 29.614  +16 48 14.66  25.2w 15VN168   568  C~2lVn      
2015 12  13.37723  03 08 29.423  +16 48 13.66  25.3w 15VN168   568  C~2lVn      
2016 01  01.37186  03 07 38.915  +16 44 06.84  25.0w 15VN168   568  C~2lVn      
2016 01  07.31862  03 07 27.182  +16 43 06.98  25.7w 15VN168   568  C~2lVn      
2016 02  04.29505  03 07 04.012  +16 40 38.22  26.1w 15VN168   568  C~2lVn      
2016 02  04.30157  03 07 03.965  +16 40 38.27  25.5w 15VN168   568  C~2lVn      
2016 02  10.28486  03 07 06.317  +16 40 36.56  25.2w 15VN168   568  C~2lVn      
2016 09  07.55628  03 16 41.515  +17 08 23.99        15VN168   568  C~2lVn      
2016 09  26.61279  03 16 07.632  +17 05 02.16  25.5w 15VN168   568  C~2lVn      
2016 10  10.43169  03 15 30.516  +17 01 49.47  24.9w 15VN168   568  C~2lVn      
2016 10  10.49031  03 15 30.333  +17 01 48.46  25.0w 15VN168   568  C~2lVn      
2016 10  27.49100  03 14 34.145  +16 57 13.50  24.3w 15VN168   568  C~2lVn      
2016 11  02.59707  03 14 12.133  +16 55 28.85  25.1w 15VN168   568  C~2lVn      
2016 11  03.51606  03 14 08.779  +16 55 12.87  25.0w 15VN168   568  C~2lVn      
2016 12  24.29598  03 11 15.769  +16 41 44.33  25.5w 15VN168   568  C~2lVn      
2017 01  02.39822  03 10 54.370  +16 40 01.85  25.2w 15VN168   568  C~2lVn      
2017 01  26.28489  03 10 22.960  +16 37 16.27  24.9w 15VN168   568  C~2lVn      
2017 09  15.60092  03 19 45.295  +17 02 46.10  24.4w 15VN168   568  C~2lVn      
2017 12  16.38250  03 14 55.691  +16 39 30.95  25.8w 15VN168   568  C~2lVn      
2017 12  16.38715  03 14 55.672  +16 39 30.86  25.1w 15VN168   568  C~2lVn      

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     0.11       0.00    -0.17
  2   0.0003     -6.19     0.13      -0.07     0.02
  3   0.0006    -12.92    -0.08      -0.39    -0.01
  4   0.0167   -342.36    -0.11     -16.15     0.07
  5   0.7319   5992.96    -0.13    -696.42     0.10
  6   0.8031   5877.98    -0.04    -786.26    -0.05
  7   0.8193   5757.03     0.04    -806.22     0.11
  8   0.8875   4904.13     0.02    -888.75     0.14
  9   0.8875   4903.68    -0.12    -888.94    -0.04
 10   0.8903   4859.36    -0.05    -892.20    -0.08
 11   0.8904   4856.66    -0.07    -892.43    -0.14
 12   0.9721   3313.37     0.12    -982.09     0.01
 13   0.9723   3310.86     0.01    -982.18     0.03
 14   0.9724   3308.57     0.13    -982.27     0.05
 15   0.9808   3134.47    -0.08    -990.83     0.04
 16   0.9996   2748.38    -0.04   -1009.38     0.05
 17   0.9997   2745.75     0.00   -1009.49     0.05
 18   1.0516   1720.68     0.07   -1057.04     0.10
 19   1.0706   1381.24     0.13   -1073.18     0.04
 20   1.0708   1378.33     0.02   -1073.40    -0.06
 21   1.1228    613.15    -0.10   -1114.17    -0.09
 22   1.1390    434.67    -0.07   -1125.95     0.03
 23   1.2156     73.84 (   0.60)  -1178.45 (  -0.19)
 24   1.2157     73.20    -0.05   -1178.22     0.05
 25   1.2320    105.26     0.02   -1189.07    -0.05
 26   1.8077   8511.05     0.05   -1783.33    -0.10
 27   1.8599   7988.62     0.16   -1851.37    -0.11
 28   1.8977   7423.69     0.18   -1897.98     0.06
 29   1.8979   7420.89     0.10   -1898.27    -0.06
 30   1.9444   6569.93    -0.27   -1951.73    -0.12
 31   1.9612   6237.33    -0.02   -1969.41     0.09
 32   1.9637   6186.64     0.07   -1972.12     0.01
 33   2.1027   3575.23     0.01   -2091.52    -0.05
 34   2.1276   3251.44    -0.00   -2107.95    -0.04
 35   2.1930   2772.04     0.01   -2146.39     0.01
 36   2.8291  10974.77    -0.09   -2793.37     0.08
 37   3.0804   6589.09     0.02   -3058.97     0.02
 38   3.0804   6588.80    -0.05   -3058.99     0.01

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.

15VN168    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        62.022    62.196    61.850
ecceobj         0.404     0.407     0.401
incobj         20.169    20.170    20.169
qmin           36.036    35.971    36.059
qmax           87.969    88.459    87.541
amean          61.383    61.565    61.233
amin           60.701    60.829    60.548
amax           62.310    62.572    62.191
emean           0.396     0.399     0.393
emin            0.380     0.382     0.378
emax            0.412     0.415     0.409
imean          21.546    21.564    21.558
imin           20.936    20.933    20.935
imax           22.289    22.309    22.189
excite_mean     0.540     0.542     0.538
fracstop        1.000     1.000     1.000
cjmean          2.929     2.928     2.930

libcent 0      -180.0    -180.0    -180.0
libamp  0      -180.0    -180.0    -180.0
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       174.2     174.3     174.0
kozaiamp        180.0     180.0     180.0