Orbit Fit and Astrometric record for 15VQ166

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: 15VQ166   
# Created Sat Apr 20 01:10:13 2019
# Orbit generated from Bernstein formalism
# Fitting   37 observations of   37
# Arc:   2.19y
# First observation: 2014/11/17
#  Last observation: 2017/01/26
Preliminary a, adot, b, bdot, g, gdot:
   0.000044   0.022801   0.000001   0.000788   0.023727   0.000000
# Chi-squared of fit:     8.73 DOF:   68 RMS:  0.09
# Min/Max residuals:    -0.26    0.28
# Exact a, adot, b, bdot, g, gdot:
  1.577011E-05  2.298969E-02  4.805695E-07  7.960012E-04  2.381623E-02  9.840769E-04
# Covariance matrix:
  3.3196E-13 -4.5766E-13  4.9967E-15 -1.1787E-14 -2.1656E-13 -6.3272E-12
 -4.5766E-13  8.9759E-13 -1.2010E-14  2.8379E-14  5.0148E-13  1.5225E-11
  4.9967E-15 -1.2010E-14  1.9388E-13 -1.2793E-13 -7.4476E-15 -2.3147E-13
 -1.1787E-14  2.8379E-14 -1.2793E-13  1.0697E-13  1.7350E-14  5.4769E-13
 -2.1656E-13  5.0148E-13 -7.4476E-15  1.7350E-14  4.1400E-13  9.3518E-12
 -6.3272E-12  1.5225E-11 -2.3147E-13  5.4769E-13  9.3518E-12  2.9370E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.403357   46.918093   -0.130493   -0.006755   -0.980807  2456978.812878
# Heliocentric elements and errors
Epoch:              2456970.5000  =  2014/11/09
Mean Anomaly:           66.24996 +/-     0.218
Argument of Peri:      277.49791 +/-     0.298
Long of Asc Node:       58.31989 +/-     0.004
Inclination:             2.02429 +/-     0.001
Eccentricity:         0.04654515 +/-    0.0007
Semi-Major Axis:     43.70499038 +/-    0.0034
Time of Perihelion: 2437549.2096 +/-      64.0
Perihelion:          41.67073503 +/-    0.0315
Aphelion:            45.73924572 +/-    0.0315
Period (y)              288.9381 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           29.25052420 +/-    0.0008
Ecliptic Y           31.47352250 +/-    0.0008
Ecliptic Z           -0.29558730 +/-    0.0000
Ecliptic XDOT        -0.00185683 +/-    0.0000
Ecliptic YDOT         0.00188330 +/-    0.0000
Ecliptic ZDOT         0.00009081 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   42.96816445 +/-    0.0008
Geocenter to KBO     41.98817283 +/-    0.0011
# Hcoef:  8.09

The following table shows the complete astrometric record for 15VQ166. 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 (15VQ166) followed by the observatory code and reference code for the source of the astrometry.

2014 11  17.31210  02 58 17.230  +16 30 09.94  24.1r 15VQ166   568  C~2lVf      
2014 11  17.42105  02 58 16.721  +16 30 07.77  23.8r 15VQ166   568  C~2lVf      
2014 11  19.33265  02 58 07.596  +16 29 30.15  24.3r 15VQ166   568  C~2lVf      
2014 11  23.43547  02 57 48.263  +16 28 10.46  24.3r 15VQ166   568  C~2lVf      
2015 09  06.63576  03 08 01.103  +17 13 05.08  24.3w 15VQ166   568  C~2lVf      
2015 09  12.52541  03 07 50.850  +17 12 23.52  24.7w 15VQ166   568  C~2lVf      
2015 10  07.46582  03 06 37.281  +17 07 26.89  24.8w 15VQ166   568  C~2lVf      
2015 10  08.47003  03 06 33.431  +17 07 11.46  24.5w 15VQ166   568  C~2lVf      
2015 10  08.52822  03 06 33.205  +17 07 10.49  24.4w 15VQ166   568  C~2lVf      
2015 11  06.28626  03 04 24.979  +16 58 34.12  24.0r 15VQ166   568  C~2lVf      
2015 11  06.34963  03 04 24.660  +16 58 32.80  24.2r 15VQ166   568  C~2lVf      
2015 11  06.42017  03 04 24.327  +16 58 31.73  24.5r 15VQ166   568  C~2lVf      
2015 11  06.48956  03 04 23.982  +16 58 30.13  24.2r 15VQ166   568  C~2lVf      
2015 11  07.50772  03 04 19.058  +16 58 10.32  24.7w 15VQ166   568  C~2lVf      
2015 11  17.27378  03 03 31.736  +16 54 59.63  24.5w 15VQ166   568  C~2lVf      
2015 11  17.32308  03 03 31.493  +16 54 58.79  24.4w 15VQ166   568  C~2lVf      
2015 12  06.40182  03 02 03.712  +16 49 06.23  23.6w 15VQ166   568  C~2lVf      
2015 12  13.33636  03 01 35.241  +16 47 12.72  24.5w 15VQ166   568  C~2lVf      
2015 12  13.39494  03 01 35.012  +16 47 11.73  24.4w 15VQ166   568  C~2lVf      
2016 01  01.38920  03 00 32.335  +16 43 05.29  24.7w 15VQ166   568  C~2lVf      
2016 01  02.35555  03 00 29.861  +16 42 55.53  24.9w 15VQ166   568  C~2lVf      
2016 01  07.33598  03 00 18.302  +16 42 11.59  24.6w 15VQ166   568  C~2lVf      
2016 02  03.22261  02 59 54.904  +16 40 58.86  24.9w 15VQ166   568  C~2lVf      
2016 02  03.22917  02 59 54.885  +16 40 58.99  24.6w 15VQ166   568  C~2lVf      
2016 02  04.26610  02 59 55.394  +16 41 01.85  24.6w 15VQ166   568  C~2lVf      
2016 02  10.25584  03 00 00.203  +16 41 27.92  24.7w 15VQ166   568  C~2lVf      
2016 09  07.55628  03 13 08.815  +17 36 19.39        15VQ166   568  C~2lVf      
2016 09  26.61685  03 12 24.553  +17 33 26.71  24.7w 15VQ166   568  C~2lVf      
2016 10  10.43169  03 11 35.808  +17 30 16.59  24.7w 15VQ166   568  C~2lVf      
2016 10  10.49031  03 11 35.565  +17 30 15.75  24.5w 15VQ166   568  C~2lVf      
2016 10  27.52577  03 10 21.554  +17 25 26.44  24.5w 15VQ166   568  C~2lVf      
2016 11  03.55078  03 09 48.223  +17 23 16.23  24.4w 15VQ166   568  C~2lVf      
2016 12  28.38756  03 05 51.646  +17 07 54.55  24.8w 15VQ166   568  C~2lVf      
2016 12  29.35312  03 05 48.813  +17 07 43.78  24.0w 15VQ166   568  C~2lVf      
2017 01  01.25010  03 05 40.764  +17 07 13.21  24.6w 15VQ166   568  C~2lVf      
2017 01  02.36014  03 05 37.846  +17 07 02.25  24.5w 15VQ166   568  C~2lVf      
2017 01  26.25322  03 05 01.425  +17 04 53.95  24.6w 15VQ166   568  C~2lVf      

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    -0.10       0.00     0.01
  2   0.0003     -7.64     0.18      -0.01    -0.10
  3   0.0055   -144.16    -0.08       1.12     0.00
  4   0.0168   -433.42    -0.02       3.61     0.06
  5   0.8031   8772.21    -0.11     148.16     0.07
  6   0.8192   8619.26    -0.09     148.07     0.04
  7   0.8875   7522.27     0.06     149.98    -0.07
  8   0.8902   7464.89    -0.02     150.22    -0.01
  9   0.8904   7461.51     0.01     150.18    -0.08
 10   0.9691   5549.61     0.05     158.72     0.01
 11   0.9693   5544.84    -0.10     158.72    -0.05
 12   0.9695   5539.95     0.17     159.01     0.18
 13   0.9697   5534.75     0.05     158.84    -0.05
 14   0.9725   5461.33     0.11     159.30    -0.03
 15   0.9992   4755.63     0.02     163.84    -0.12
 16   0.9993   4752.04     0.02     164.00    -0.01
 17   1.0516   3443.11    -0.12     175.57    -0.13
 18   1.0706   3018.74     0.02     180.68     0.01
 19   1.0707   3015.30     0.08     180.65    -0.08
 20   1.1227   2081.91     0.05     196.18     0.17
 21   1.1254   2045.06     0.03     196.79    -0.05
 22   1.1390   1873.32    -0.08     201.26     0.05
 23   1.2126   1530.23     0.00     225.99     0.09
 24   1.2126   1530.01    -0.26     226.19     0.28
 25   1.2155   1537.83     0.14     226.88    -0.01
 26   1.2319   1611.47     0.01     232.45    -0.00
 27   1.8077  13402.53     0.03     309.98    -0.02
 28   1.8598  12743.85    -0.07     311.54    -0.15
 29   1.8977  12018.58     0.08     314.09    -0.06
 30   1.8978  12014.99     0.00     314.21     0.02
 31   1.9445  10913.81    -0.06     319.05    -0.10
 32   1.9637  10417.97     0.01     321.93     0.06
 33   2.1138   6899.91     0.04     355.76     0.03
 34   2.1165   6857.85    -0.01     356.54     0.05
 35   2.1244   6738.38    -0.00     358.79     0.02
 36   2.1274   6695.10     0.01     359.73     0.03
 37   2.1929   6157.26    -0.05     379.88    -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.

15VQ166    quality flag:2

Type:         7:4EEE    7:4EEE CLASSICAL

axisobj        44.056    44.068    44.044
ecceobj         0.054     0.055     0.052
incobj          2.019     2.019     2.019
qmin           40.938    40.956    40.619
qmax           46.687    46.694    47.089
amean          43.726    43.726    43.726
amin           43.384    43.385    43.366
amax           44.090    44.087    44.113
emean           0.049     0.049     0.049
emin            0.038     0.039     0.030
emax            0.059     0.059     0.068
imean           1.079     1.082     1.069
imin            0.242     0.248     0.189
imax            1.687     1.690     1.669
excite_mean     0.053     0.053     0.052
fracstop        1.000     1.000     1.000
cjmean          3.095     3.095     3.095

libcent 0       176.6     180.6    -180.0
libamp  0       128.3     123.9    -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       230.0     247.2     192.4
kozaiamp        180.0     180.0     179.9