Orbit Fit and Astrometric record for 15VZ166

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: 15VZ166   
# Created Tue Apr 23 01:10:47 2019
# Orbit generated from Bernstein formalism
# Fitting   27 observations of   27
# Arc:   3.06y
# First observation: 2014/11/23
#  Last observation: 2017/12/16
Preliminary a, adot, b, bdot, g, gdot:
  -0.000044   0.025096  -0.000002   0.001904   0.024791   0.000000
# Chi-squared of fit:    11.75 DOF:   48 RMS:  0.12
# Min/Max residuals:    -0.29    0.33
# Exact a, adot, b, bdot, g, gdot:
  1.625650E-05  2.518705E-02  1.317166E-06  1.912881E-03  2.497360E-02 -2.996537E-04
# Covariance matrix:
  8.8406E-13 -9.3923E-13  3.8126E-14 -5.6161E-14 -4.3829E-13 -8.5224E-12
 -9.3923E-13  1.1545E-12 -5.0853E-14  7.5022E-14  5.6196E-13  1.1383E-11
  3.8126E-14 -5.0853E-14  2.8889E-13 -1.4558E-13 -2.8020E-14 -5.4368E-13
 -5.6161E-14  7.5022E-14 -1.4558E-13  9.2364E-14  4.0594E-14  8.0129E-13
 -4.3829E-13  5.6196E-13 -2.8020E-14  4.0594E-14  4.5735E-13  6.1667E-12
 -8.5224E-12  1.1383E-11 -5.4368E-13  8.0129E-13  6.1667E-12  1.2159E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.040915   47.648963   -0.222380   -0.017322   -0.962477  2456984.917208
# Heliocentric elements and errors
Epoch:              2456980.5000  =  2014/11/19
Mean Anomaly:          352.58562 +/-     0.366
Argument of Peri:      355.24236 +/-     0.417
Long of Asc Node:       61.09517 +/-     0.002
Inclination:             4.46578 +/-     0.001
Eccentricity:         0.06324416 +/-    0.0001
Semi-Major Axis:     43.74471955 +/-    0.0034
Time of Perihelion: 2459157.0035 +/-     107.6
Perihelion:          40.97812132 +/-    0.0047
Aphelion:            46.51131779 +/-    0.0050
Period (y)              289.3321 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           27.45186919 +/-    0.0007
Ecliptic Y           30.45034060 +/-    0.0008
Ecliptic Z           -0.72740343 +/-    0.0000
Ecliptic XDOT        -0.00206444 +/-    0.0000
Ecliptic YDOT         0.00183371 +/-    0.0000
Ecliptic ZDOT         0.00021037 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.00435929 +/-    0.0008
Geocenter to KBO     40.04228842 +/-    0.0011
# Hcoef:  9.47

The following table shows the complete astrometric record for 15VZ166. 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 (15VZ166) followed by the observatory code and reference code for the source of the astrometry.

2014 11  23.41643  03 01 57.419  +16 05 46.96  25.2r 15VZ166   568  C~2lVh      
2015 08  11.59273  03 12 49.962  +16 56 20.44  26.3w 15VZ166   568  C~2lVh      
2015 09  12.51312  03 12 35.378  +16 55 13.73  25.6w 15VZ166   568  C~2lVh      
2015 11  07.35903  03 08 58.880  +16 41 09.79  25.0r 15VZ166   568  C~2lVh      
2015 11  07.40112  03 08 58.667  +16 41 08.84  25.2r 15VZ166   568  C~2lVh      
2015 11  07.44330  03 08 58.456  +16 41 08.06  25.5r 15VZ166   568  C~2lVh      
2015 11  10.52886  03 08 42.832  +16 40 08.40  25.4w 15VZ166   568  C~2lVh      
2015 11  17.37547  03 08 08.164  +16 37 56.47  25.6w 15VZ166   568  C~2lVh      
2015 11  17.42215  03 08 07.926  +16 37 55.65  25.7w 15VZ166   568  C~2lVh      
2015 12  13.31874  03 06 06.143  +16 30 21.81  25.6w 15VZ166   568  C~2lVh      
2015 12  13.37723  03 06 05.891  +16 30 20.84  26.6w 15VZ166   568  C~2lVh      
2016 01  07.31862  03 04 43.967  +16 25 38.00  25.6w 15VZ166   568  C~2lVh      
2016 02  10.28486  03 04 22.312  +16 25 33.18  26.0w 15VZ166   568  C~2lVh      
2016 09  06.60560  03 18 21.728  +17 24 28.92  25.8w 15VZ166   568  C~2lVh      
2016 10  10.40230  03 16 47.025  +17 18 30.15  25.9w 15VZ166   568  C~2lVh      
2016 10  10.46065  03 16 46.774  +17 18 29.21  26.1w 15VZ166   568  C~2lVh      
2016 11  02.59707  03 15 00.379  +17 11 51.85  25.3w 15VZ166   568  C~2lVh      
2016 11  03.51606  03 14 55.788  +17 11 35.00  26.0w 15VZ166   568  C~2lVh      
2016 12  24.29598  03 10 59.786  +16 57 21.52  25.1w 15VZ166   568  C~2lVh      
2016 12  29.37514  03 10 42.985  +16 56 24.72  25.4w 15VZ166   568  C~2lVh      
2017 01  02.39822  03 10 31.137  +16 55 46.18  26.1w 15VZ166   568  C~2lVh      
2017 01  26.28489  03 09 50.946  +16 53 59.34  25.6w 15VZ166   568  C~2lVh      
2017 09  16.61554  03 23 43.998  +17 51 30.49  25.5w 15VZ166   568  C~2lVh      
2017 09  17.60038  03 23 41.853  +17 51 22.86  25.6w 15VZ166   568  C~2lVh      
2017 09  23.55460  03 23 27.078  +17 50 29.48  25.8w 15VZ166   568  C~2lVh      
2017 09  24.59522  03 23 24.178  +17 50 18.53  24.8w 15VZ166   568  C~2lVh      
2017 12  16.39181  03 17 11.235  +17 28 11.86  26.2w 15VZ166   568  C~2lVh      

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    -0.06       0.00    -0.02
  2   0.7151   9863.03     0.17     362.01    -0.06
  3   0.8025   9643.05     0.03     353.37     0.04
  4   0.9554   6416.85    -0.06     374.74     0.09
  5   0.9555   6413.65    -0.06     374.66    -0.06
  6   0.9556   6410.51     0.03     374.72    -0.05
  7   0.9640   6178.03    -0.02     378.07    -0.01
  8   0.9828   5662.28    -0.04     386.22     0.03
  9   0.9829   5658.76     0.01     386.36     0.10
 10   1.0538   3849.50     0.07     427.38     0.07
 11   1.0540   3845.75    -0.01     427.44     0.00
 12   1.1223   2634.63    -0.22     479.37    -0.27
 13   1.2152   2333.78     0.33     560.69     0.20
 14   1.7883  14912.55     0.02     744.36    -0.07
 15   1.8809  13503.38     0.06     750.31     0.10
 16   1.8810  13499.65    -0.09     750.34     0.08
 17   1.9444  11918.67    -0.22     766.19    -0.09
 18   1.9469  11850.54    -0.16     767.25     0.10
 19   2.0859   8352.95    -0.03     843.37     0.02
 20   2.0998   8105.08     0.03     853.32    -0.25
 21   2.1108   7930.70     0.14     861.85    -0.02
 22   2.1762   7345.64     0.03     914.15     0.02
 23   2.8151  19815.74    -0.01    1136.90    -0.05
 24   2.8178  19783.89     0.05    1137.23     0.08
 25   2.8341  19564.31     0.15    1138.76     0.17
 26   2.8369  19521.09    -0.04    1138.61    -0.29
 27   3.0636  13991.85    -0.07    1222.68     0.12

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.

15VZ166    quality flag:2

Type:         7:4EEE CLASSICAL    7:4EEE

axisobj        44.094    44.104    44.083
ecceobj         0.070     0.070     0.070
incobj          4.456     4.456     4.456
qmin           40.345    40.055    40.399
qmax           47.381    47.697    47.297
amean          43.726    43.725    43.726
amin           43.368    43.355    43.361
amax           44.114    44.128    44.111
emean           0.062     0.067     0.061
emin            0.050     0.052     0.049
emax            0.075     0.082     0.073
imean           2.951     2.854     2.997
imin            2.162     2.056     2.201
imax            3.684     3.587     3.719
excite_mean     0.081     0.083     0.081
fracstop        1.000     1.000     1.000
cjmean          3.090     3.090     3.090

libcent 0       180.4    -180.0     181.7
libamp  0       167.4    -180.0     151.8
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       175.3     172.0     179.5
kozaiamp        180.0     179.9     180.0