Orbit Fit and Astrometric record for 15VF165

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: 15VF165   
# Created Tue Feb 19 02:10:39 2019
# Orbit generated from Bernstein formalism
# Fitting   39 observations of   39
# Arc:   3.06y
# First observation: 2014/11/23
#  Last observation: 2017/12/16
Preliminary a, adot, b, bdot, g, gdot:
  -0.000689   0.024911   0.000281  -0.010820   0.027409   0.000000
# Chi-squared of fit:     6.82 DOF:   72 RMS:  0.07
# Min/Max residuals:    -0.19    0.27
# Exact a, adot, b, bdot, g, gdot:
  1.416157E-05  2.414480E-02 -6.076080E-06 -1.051222E-02  2.704879E-02 -9.790288E-03
# Covariance matrix:
  6.4823E-13 -6.8404E-13 -1.6513E-13  2.3352E-13 -3.1429E-13 -6.0643E-12
 -6.8404E-13  8.1802E-13  2.1250E-13 -3.0047E-13  3.9794E-13  7.8036E-12
 -1.6513E-13  2.1250E-13  2.4932E-13 -1.7797E-13  1.1484E-13  2.1856E-12
  2.3352E-13 -3.0047E-13 -1.7797E-13  1.7661E-13 -1.6286E-13 -3.0911E-12
 -3.1429E-13  3.9794E-13  1.1484E-13 -1.6286E-13  3.0764E-13  4.2204E-12
 -6.0643E-12  7.8036E-12  2.1856E-12 -3.0911E-12  4.2204E-12  8.0267E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.396953   48.819148   -0.202346   -0.006536   -0.967025  2456984.898148
# Heliocentric elements and errors
Epoch:              2456980.5000  =  2014/11/19
Mean Anomaly:          296.11811 +/-     0.034
Argument of Peri:      285.27083 +/-     0.012
Long of Asc Node:      228.23814 +/-     0.000
Inclination:            23.47890 +/-     0.001
Eccentricity:         0.34777845 +/-    0.0003
Semi-Major Axis:     39.44972109 +/-    0.0099
Time of Perihelion: 2473040.2793 +/-       6.0
Perihelion:          25.72995806 +/-    0.0138
Aphelion:            53.16948413 +/-    0.0181
Period (y)              247.7845 +/-      0.09
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           24.82339151 +/-    0.0005
Ecliptic Y           28.68688597 +/-    0.0006
Ecliptic Z           -0.25638830 +/-    0.0000
Ecliptic XDOT        -0.00250093 +/-    0.0000
Ecliptic YDOT         0.00085280 +/-    0.0000
Ecliptic ZDOT        -0.00105704 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   37.93684130 +/-    0.0005
Geocenter to KBO     36.97023365 +/-    0.0008
# Hcoef:  8.48

The following table shows the complete astrometric record for 15VF165. 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 (15VF165) followed by the observatory code and reference code for the source of the astrometry.

2014 11  23.39737  03 05 54.418  +17 02 19.29  24.0r 15VF165   568  C~2lVa      
2015 09  07.63311  03 17 42.768  +17 20 05.68  24.2w 15VF165   568  C~2lVa      
2015 09  12.49674  03 17 34.280  +17 18 56.77  24.5w 15VF165   568  C~2lVa      
2015 10  07.54436  03 16 15.847  +17 10 50.55  24.3w 15VF165   568  C~2lVa      
2015 10  07.60373  03 16 15.589  +17 10 49.08  24.3w 15VF165   568  C~2lVa      
2015 10  09.58362  03 16 07.230  +17 10 02.69  23.9w 15VF165   568  C~2lVa      
2015 11  07.33788  03 13 42.734  +16 57 23.41  24.1r 15VF165   568  C~2lVa      
2015 11  07.38006  03 13 42.491  +16 57 22.26  24.2r 15VF165   568  C~2lVa      
2015 11  07.42224  03 13 42.251  +16 57 21.07  24.3r 15VF165   568  C~2lVa      
2015 11  10.50536  03 13 25.251  +16 55 54.61  24.3w 15VF165   568  C~2lVa      
2015 11  17.35218  03 12 47.375  +16 52 42.58  24.2w 15VF165   568  C~2lVa      
2015 11  17.39878  03 12 47.109  +16 52 41.29  24.3w 15VF165   568  C~2lVa      
2015 12  06.36096  03 11 06.379  +16 44 11.26  23.7w 15VF165   568  C~2lVa      
2015 12  06.49848  03 11 05.689  +16 44 07.59  23.7w 15VF165   568  C~2lVa      
2016 01  01.34872  03 09 18.374  +16 34 44.93  24.4w 15VF165   568  C~2lVa      
2016 01  07.41130  03 09 00.993  +16 33 06.11  24.4w 15VF165   568  C~2lVa      
2016 01  07.42868  03 09 00.948  +16 33 06.17  24.5w 15VF165   568  C~2lVa      
2016 01  08.25624  03 08 58.869  +16 32 53.72  24.4w 15VF165   568  C~2lVa      
2016 02  04.29505  03 08 29.905  +16 28 57.73  24.8w 15VF165   568  C~2lVa      
2016 02  04.30157  03 08 29.886  +16 28 57.42  24.6w 15VF165   568  C~2lVa      
2016 02  10.28486  03 08 34.341  +16 28 50.11  24.2w 15VF165   568  C~2lVa      
2016 09  07.56206  03 24 03.525  +17 06 17.48        15VF165   568  C~2lVa      
2016 09  26.62090  03 23 18.450  +17 00 49.38  24.3w 15VF165   568  C~2lVa      
2016 10  10.43747  03 22 25.633  +16 55 40.65  24.6w 15VF165   568  C~2lVa      
2016 10  10.51394  03 22 25.292  +16 55 38.88  24.2w 15VF165   568  C~2lVa      
2016 11  02.51995  03 20 30.789  +16 45 37.07        15VF165   568  C~2lVa      
2016 11  04.39506  03 20 20.540  +16 44 45.39  24.4w 15VF165   568  C~2lVa      
2016 12  24.33186  03 16 04.217  +16 23 42.70  24.4w 15VF165   568  C~2lVa      
2017 01  02.43457  03 15 31.900  +16 20 58.64  24.4w 15VF165   568  C~2lVa      
2017 01  26.32220  03 14 45.316  +16 16 28.99  24.5w 15VF165   568  C~2lVa      
2017 01  27.28684  03 14 44.709  +16 16 23.37  24.3w 15VF165   568  C~2lVa      
2017 09  15.58250  03 30 18.391  +16 49 35.79  24.1w 15VF165   568  C~2lVa      
2017 09  16.63393  03 30 16.165  +16 49 17.80  24.2w 15VF165   568  C~2lVa      
2017 09  17.59434  03 30 14.038  +16 49 01.05  24.4w 15VF165   568  C~2lVa      
2017 09  21.62755  03 30 04.091  +16 47 47.24  24.3w 15VF165   568  C~2lVa      
2017 09  22.56874  03 30 01.546  +16 47 29.40  24.4w 15VF165   568  C~2lVa      
2017 09  23.57295  03 29 58.740  +16 47 09.91  24.2w 15VF165   568  C~2lVa      
2017 12  16.35926  03 23 07.577  +16 12 09.57  24.3w 15VF165   568  C~2lVa      
2017 12  16.37785  03 23 07.485  +16 12 09.21  24.3w 15VF165   568  C~2lVa      

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    -0.01
  2   0.7891  10075.77     0.01   -1680.06    -0.05
  3   0.8025   9940.20     0.02   -1715.11     0.01
  4   0.8710   8726.29     0.01   -1892.07    -0.06
  5   0.8712   8722.33    -0.09   -1892.52    -0.12
  6   0.8766   8594.35     0.08   -1906.00     0.00
  7   0.9553   6392.60     0.05   -2093.74     0.04
  8   0.9555   6388.93    -0.04   -2093.93     0.09
  9   0.9556   6385.29    -0.10   -2094.17     0.10
 10   0.9640   6126.93     0.05   -2112.99     0.09
 11   0.9828   5551.40    -0.00   -2153.98     0.03
 12   0.9829   5547.37    -0.06   -2154.21     0.06
 13   1.0348   4016.44     0.03   -2260.10     0.07
 14   1.0352   4005.91     0.08   -2260.98    -0.11
 15   1.1060   2368.77    -0.01   -2388.44     0.00
 16   1.1226   2101.42    -0.16   -2416.11    -0.19
 17   1.1226   2100.82    -0.06   -2415.88     0.12
 18   1.1249   2068.67    -0.05   -2419.79    -0.07
 19   1.1989   1603.76     0.27   -2534.30     0.13
 20   1.1989   1603.41    -0.10   -2534.53    -0.06
 21   1.2153   1663.13     0.15   -2558.92    -0.02
 22   1.7910  15159.34     0.03   -3880.64    -0.03
 23   1.8432  14447.47     0.02   -4035.24    -0.01
 24   1.8810  13632.41    -0.01   -4141.91    -0.02
 25   1.8812  13627.20    -0.01   -4142.38     0.05
 26   1.9442  11877.32     0.10   -4304.66    -0.11
 27   1.9493  11721.25     0.02   -4316.84    -0.03
 28   2.0861   7825.20    -0.04   -4580.53     0.01
 29   2.1110   7332.60    -0.18   -4616.86    -0.01
 30   2.1764   6613.70     0.02   -4700.61     0.01
 31   2.1790   6603.78    -0.06   -4703.73     0.03
 32   2.8123  20162.39    -0.07   -6198.52     0.00
 33   2.8152  20126.66    -0.00   -6208.17    -0.01
 34   2.8178  20092.64    -0.00   -6216.96     0.00
 35   2.8288  19934.62    -0.02   -6253.64    -0.06
 36   2.8314  19894.44    -0.03   -6262.00     0.07
 37   2.8342  19850.19     0.05   -6271.04     0.04
 38   3.0636  13556.09     0.08   -6828.26    -0.03
 39   3.0636  13554.71     0.04   -6828.27     0.03

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.

15VF165    quality flag:3

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

axisobj        39.601    39.625    39.577
ecceobj         0.343     0.344     0.342
incobj         23.397    23.397    23.397
qmin           25.102    25.083    25.074
qmax           54.394    54.416    54.379
amean          39.453    39.453    39.453
amin           39.072    39.080    39.055
amax           39.960    39.941    39.939
emean           0.283     0.283     0.281
emin            0.160     0.161     0.161
emax            0.363     0.363     0.362
imean          26.610    26.628    26.621
imin           23.736    23.668    23.750
imax           29.890    29.904    29.965
excite_mean     0.533     0.533     0.533
fracstop        1.000     1.000     1.000
cjmean          2.721     2.721     2.722

libcent 0       180.4     181.9     180.3
libamp  0        53.2      42.3      65.5
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       275.9     276.8     269.0
kozaiamp         71.8      69.6      77.3