Orbit Fit and Astrometric record for 15VK166

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: 15VK166   
# Created Wed Feb 20 02:10:39 2019
# Orbit generated from Bernstein formalism
# Fitting   41 observations of   41
# Arc:   3.08y
# First observation: 2014/11/17
#  Last observation: 2017/12/16
Preliminary a, adot, b, bdot, g, gdot:
   0.000063   0.027215  -0.000003   0.000057   0.025484   0.000000
# Chi-squared of fit:     3.00 DOF:   76 RMS:  0.05
# Min/Max residuals:    -0.12    0.16
# Exact a, adot, b, bdot, g, gdot:
  1.674171E-05  2.759921E-02  4.174623E-07  5.914768E-05  2.574692E-02  2.976525E-03
# Covariance matrix:
  2.4818E-13 -2.8955E-13  1.0274E-15 -9.2961E-16 -1.1133E-13 -2.6166E-12
 -2.8955E-13  4.6743E-13 -1.9909E-15  1.7711E-15  2.1576E-13  5.0076E-12
  1.0274E-15 -1.9909E-15  1.3598E-13 -7.4781E-14 -1.8481E-15 -2.3920E-14
 -9.2961E-16  1.7711E-15 -7.4781E-14  5.6313E-14  6.5307E-16  2.1686E-14
 -1.1133E-13  2.1576E-13 -1.8481E-15  6.5307E-16  2.0093E-13  2.5920E-12
 -2.6166E-12  5.0076E-12 -2.3920E-14  2.1686E-14  2.5920E-12  6.1009E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -2.378044   48.041197   -0.110533   -0.040653   -0.982442  2456978.772168
# Heliocentric elements and errors
Epoch:              2456970.5000  =  2014/11/09
Mean Anomaly:           25.61200 +/-     0.042
Argument of Peri:      234.50323 +/-     0.073
Long of Asc Node:      135.24373 +/-     0.012
Inclination:             2.32248 +/-     0.000
Eccentricity:         0.20210387 +/-    0.0002
Semi-Major Axis:     48.08774896 +/-    0.0050
Time of Perihelion: 2448305.0494 +/-      14.0
Perihelion:          38.36902891 +/-    0.0109
Aphelion:            57.80646901 +/-    0.0118
Period (y)              333.4724 +/-      0.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           26.51772036 +/-    0.0004
Ecliptic Y           29.66386291 +/-    0.0005
Ecliptic Z           -1.61155954 +/-    0.0000
Ecliptic XDOT        -0.00197507 +/-    0.0000
Ecliptic YDOT         0.00219260 +/-    0.0000
Ecliptic ZDOT        -0.00000675 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   39.82124282 +/-    0.0005
Geocenter to KBO     38.83959215 +/-    0.0007
# Hcoef:  7.51

The following table shows the complete astrometric record for 15VK166. 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 (15VK166) followed by the observatory code and reference code for the source of the astrometry.

2014 11  17.27139  03 05 03.518  +14 55 12.77  23.3r 15VK166   568  C~2lVe      
2014 11  17.38009  03 05 02.954  +14 55 10.59  23.5r 15VK166   568  C~2lVe      
2014 11  17.49387  03 05 02.368  +14 55 08.25  23.3r 15VK166   568  C~2lVe      
2014 11  19.28114  03 04 53.378  +14 54 31.96  23.3r 15VK166   568  C~2lVe      
2014 11  23.38468  03 04 32.888  +14 53 10.26  23.3r 15VK166   568  C~2lVe      
2015 08  11.61007  03 15 56.734  +15 43 00.47  23.8w 15VK166   568  C~2lVe      
2015 09  06.62757  03 15 55.931  +15 41 24.90  23.6w 15VK166   568  C~2lVe      
2015 09  12.51723  03 15 46.616  +15 40 28.93  23.6w 15VK166   568  C~2lVe      
2015 10  08.45753  03 14 30.275  +15 34 17.83  23.5w 15VK166   568  C~2lVe      
2015 10  08.51654  03 14 30.050  +15 34 16.81  23.6w 15VK166   568  C~2lVe      
2015 11  07.36426  03 12 12.047  +15 24 32.23  23.3r 15VK166   568  C~2lVe      
2015 11  07.40638  03 12 11.835  +15 24 31.39  23.2r 15VK166   568  C~2lVe      
2015 11  07.44859  03 12 11.614  +15 24 30.51  23.2r 15VK166   568  C~2lVe      
2015 11  10.53471  03 11 55.898  +15 23 27.23  23.4w 15VK166   568  C~2lVe      
2015 11  17.38127  03 11 20.992  +15 21 08.75  23.5w 15VK166   568  C~2lVe      
2015 11  17.42797  03 11 20.749  +15 21 07.86  23.5w 15VK166   568  C~2lVe      
2015 12  06.39016  03 09 48.161  +15 15 15.45  23.5w 15VK166   568  C~2lVe      
2015 12  13.32462  03 09 17.662  +15 13 25.28  23.5w 15VK166   568  C~2lVe      
2015 12  13.38310  03 09 17.412  +15 13 24.40  23.7w 15VK166   568  C~2lVe      
2016 01  01.37764  03 08 09.643  +15 09 38.97  23.6w 15VK166   568  C~2lVe      
2016 01  07.32440  03 07 54.264  +15 08 55.25  23.6w 15VK166   568  C~2lVe      
2016 02  04.30735  03 07 27.496  +15 08 47.85  23.8w 15VK166   568  C~2lVe      
2016 02  04.31413  03 07 27.509  +15 08 47.85  23.8w 15VK166   568  C~2lVe      
2016 02  04.32117  03 07 27.506  +15 08 47.83  23.8w 15VK166   568  C~2lVe      
2016 02  04.32803  03 07 27.508  +15 08 47.91  23.7w 15VK166   568  C~2lVe      
2016 02  05.26985  03 07 27.999  +15 08 53.43  23.7w 15VK166   568  C~2lVe      
2016 02  10.29068  03 07 32.155  +15 09 29.66  23.9w 15VK166   568  C~2lVe      
2016 09  07.56785  03 22 04.258  +16 05 19.47        15VK166   568  C~2lVe      
2016 09  27.50655  03 21 19.826  +16 01 30.64  23.8w 15VK166   568  C~2lVe      
2016 10  10.39070  03 20 34.007  +15 58 05.90  23.7w 15VK166   568  C~2lVe      
2016 10  10.44903  03 20 33.766  +15 58 04.95  23.7w 15VK166   568  C~2lVe      
2016 11  02.51417  03 18 48.356  +15 50 50.15  23.6w 15VK166   568  C~2lVe      
2016 11  04.38927  03 18 38.973  +15 50 13.00  23.5w 15VK166   568  C~2lVe      
2016 12  24.30148  03 14 45.474  +15 36 02.66  23.7w 15VK166   568  C~2lVe      
2017 01  02.40371  03 14 16.330  +15 34 34.23  23.7w 15VK166   568  C~2lVe      
2017 01  26.29235  03 13 35.174  +15 33 14.41  23.6w 15VK166   568  C~2lVe      
2017 01  26.34976  03 13 35.136  +15 33 14.45  23.5w 15VK166   568  C~2lVe      
2017 09  17.59434  03 27 57.436  +16 27 08.17  23.6w 15VK166   568  C~2lVe      
2017 09  23.57295  03 27 43.312  +16 25 58.90  23.7w 15VK166   568  C~2lVe      
2017 12  16.35926  03 21 29.602  +16 02 07.93  23.7w 15VK166   568  C~2lVe      
2017 12  16.37785  03 21 29.523  +16 02 07.57  23.5w 15VK166   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     0.04       0.00    -0.08
  2   0.0003     -8.46    -0.03       0.15    -0.03
  3   0.0006    -17.27    -0.05       0.24    -0.04
  4   0.0055   -152.53    -0.00       1.23    -0.04
  5   0.0167   -460.56     0.01       4.55    -0.01
  6   0.7319   9880.67     0.01     217.56    -0.05
  7   0.8032   9844.25     0.16     128.31    -0.02
  8   0.8193   9699.41    -0.12     109.71     0.01
  9   0.8903   8535.48    -0.10      42.92     0.02
 10   0.8905   8532.07     0.06      42.80    -0.01
 11   0.9722   6450.82     0.02      10.09     0.06
 12   0.9723   6447.64     0.10      10.10     0.06
 13   0.9724   6444.32     0.05      10.11     0.05
 14   0.9809   6208.18    -0.05       9.94     0.00
 15   0.9996   5684.24    -0.02      11.83    -0.01
 16   0.9997   5680.61    -0.02      11.92     0.04
 17   1.0517   4294.81    -0.01      33.13    -0.01
 18   1.0706   3839.88    -0.04      46.38    -0.00
 19   1.0708   3836.16    -0.02      46.51    -0.01
 20   1.1228   2830.52    -0.07      95.62     0.05
 21   1.1391   2604.32    -0.04     114.11     0.04
 22   1.2157   2229.33    -0.00     212.56     0.12
 23   1.2157   2229.51     0.13     212.51     0.04
 24   1.2157   2229.47     0.03     212.50     0.01
 25   1.2158   2229.52     0.03     212.57     0.05
 26   1.2183   2237.86    -0.00     215.95    -0.03
 27   1.2321   2305.64    -0.01     234.40     0.03
 28   1.8078  15369.15    -0.05     134.08    -0.01
 29   1.8624  14687.81    -0.03      77.05    -0.06
 30   1.8977  13993.35     0.02      49.20    -0.05
 31   1.8978  13989.73    -0.02      49.18     0.01
 32   1.9610  12401.93    -0.01      22.79    -0.03
 33   1.9661  12261.03     0.02      22.12     0.01
 34   2.1028   8775.42     0.06      85.94    -0.01
 35   2.1277   8345.21    -0.05     112.18    -0.00
 36   2.1931   7749.75     0.01     193.12    -0.04
 37   2.1932   7749.23    -0.04     193.31    -0.07
 38   2.8346  20660.62     0.03     115.64     0.04
 39   2.8509  20444.45     0.00      99.12     0.02
 40   3.0803  14834.34     0.01      76.89     0.02
 41   3.0804  14833.14    -0.01      76.83    -0.08

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.

15VK166    quality flag:3

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

axisobj        48.581    48.598    48.564
ecceobj         0.211     0.211     0.210
incobj          2.322     2.322     2.322
qmin           37.837    37.801    37.816
qmax           58.857    58.876    58.780
amean          47.798    47.798    47.798
amin           47.110    47.098    47.142
amax           48.588    48.598    48.564
emean           0.194     0.195     0.193
emin            0.178     0.179     0.177
emax            0.211     0.212     0.210
imean           1.563     1.494     1.441
imin            1.141     1.104     1.143
imax            1.954     1.829     1.794
excite_mean     0.196     0.197     0.195
fracstop        1.000     1.000     1.000
cjmean          3.101     3.100     3.101

libcent 0       180.0     180.4     180.5
libamp  0       162.7     164.7     159.3
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       266.9     176.8     170.5
kozaiamp        180.0     180.0     179.9