Orbit Fit and Astrometric record for 15VJ168

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: 15VJ168   
# Created Fri Dec  3 02:13:39 2021
# Orbit generated from Bernstein formalism
# Fitting     35 observations of     35
# Arc:   2.32y
# First observation: 2015/08/20
#  Last observation: 2017/12/13
Preliminary a, adot, b, bdot, g, gdot:
  -0.000071   0.008539   0.000001   0.001486   0.013871   0.000000
# Chi-squared of fit:     6.01 DOF:     64 RMS:  0.07
# Min/Max residuals:    -0.21    0.15
# Exact a, adot, b, bdot, g, gdot:
  9.675028E-06  8.484612E-03  1.711578E-06  1.482603E-03  1.384662E-02  2.865601E-03
# Covariance matrix:
  2.5916E-13 -3.8399E-14 -2.9051E-15  1.7572E-14  1.8917E-13  5.6842E-12
 -3.8399E-14  1.5336E-13 -6.2433E-15  2.4983E-14  8.8033E-14  7.9947E-12
 -2.9051E-15 -6.2433E-15  9.9060E-14 -6.7156E-14 -7.7879E-15 -6.4709E-13
  1.7572E-14  2.4983E-14 -6.7156E-14  8.2768E-14  3.7418E-14  2.7063E-12
  1.8917E-13  8.8033E-14 -7.7879E-15  3.7418E-14  2.6568E-13  1.2038E-11
  5.6842E-12  7.9947E-12 -6.4709E-13  2.7063E-12  1.2038E-11  8.6723E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.090858   53.093757    1.012036   -0.001236   -0.071954  2457255.076589
# Heliocentric elements and errors
Epoch:              2457250.5000  =  2015/08/16
Mean Anomaly:          109.71112 +/-     0.430
Argument of Peri:      211.65260 +/-     0.306
Long of Asc Node:       58.53600 +/-     0.001
Inclination:             9.92219 +/-     0.002
Eccentricity:         0.36407714 +/-    0.0015
Semi-Major Axis:     59.42886263 +/-    0.0752
Time of Perihelion: 2406253.7280 +/-     175.0
Perihelion:          37.79217247 +/-    0.0988
Aphelion:            81.06555279 +/-    0.1341
Period (y)              458.1465 +/-      0.87
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           44.20901300 +/-    0.0016
Ecliptic Y           57.18757470 +/-    0.0021
Ecliptic Z           -1.37476906 +/-    0.0001
Ecliptic XDOT        -0.00099992 +/-    0.0000
Ecliptic YDOT         0.00145851 +/-    0.0000
Ecliptic ZDOT         0.00028237 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   72.29623449 +/-    0.0020
Geocenter to KBO     72.21978427 +/-    0.0027
# Hcoef:  5.75

The following table shows the complete astrometric record for 15VJ168. 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 (15VJ168) followed by the observatory code and reference code for the source of the astrometry.

2015 08  20.57580  03 23 56.786  +17 29 25.37  24.5w 15VJ168   568  C~2lVm      
2015 09  07.61675  03 23 48.888  +17 28 55.09  24.7w 15VJ168   568  C~2lVm      
2015 10  07.52101  03 22 59.228  +17 25 53.83  24.4w 15VJ168   568  C~2lVm      
2015 10  07.58040  03 22 59.078  +17 25 53.40  24.4w 15VJ168   568  C~2lVm      
2015 11  06.33360  03 21 37.395  +17 21 02.59  24.1r 15VJ168   568  C~2lVm      
2015 11  06.39716  03 21 37.211  +17 21 01.79  24.8r 15VJ168   568  C~2lVm      
2015 11  06.40423  03 21 37.165  +17 21 01.89  24.3r 15VJ168   568  C~2lVm      
2015 11  06.47375  03 21 36.969  +17 21 01.16  24.1r 15VJ168   568  C~2lVm      
2015 11  07.49015  03 21 33.878  +17 20 50.31  24.4w 15VJ168   568  C~2lVm      
2015 11  17.47136  03 21 03.195  +17 19 03.39  24.4w 15VJ168   568  C~2lVm      
2015 11  17.55969  03 21 02.919  +17 19 02.41  24.4w 15VJ168   568  C~2lVm      
2015 12  06.32006  03 20 06.745  +17 15 50.63  24.2w 15VJ168   568  C~2lVm      
2015 12  06.45375  03 20 06.366  +17 15 49.33  24.8w 15VJ168   568  C~2lVm      
2015 12  31.34139  03 19 04.872  +17 12 31.10  24.6w 15VJ168   568  C~2lVm      
2016 01  07.37071  03 18 51.927  +17 11 53.07  24.5w 15VJ168   568  C~2lVm      
2016 01  08.23304  03 18 50.492  +17 11 49.08  24.6w 15VJ168   568  C~2lVm      
2016 02  05.31732  03 18 25.688  +17 11 03.75  24.6w 15VJ168   568  C~2lVm      
2016 02  05.32390  03 18 25.670  +17 11 03.53  24.4w 15VJ168   568  C~2lVm      
2016 02  11.27002  03 18 26.184  +17 11 16.24  24.7w 15VJ168   568  C~2lVm      
2016 09  07.62568  03 25 41.271  +17 41 05.08        15VJ168   568  C~2lVm      
2016 09  26.58416  03 25 14.284  +17 39 28.35  25.0w 15VJ168   568  C~2lVm      
2016 10  09.54522  03 24 46.442  +17 37 49.47  24.7w 15VJ168   568  C~2lVm      
2016 10  09.61729  03 24 46.264  +17 37 48.94  24.5w 15VJ168   568  C~2lVm      
2016 11  02.49681  03 23 40.804  +17 33 59.24  24.5w 15VJ168   568  C~2lVm      
2016 11  04.47292  03 23 34.857  +17 33 38.58  24.6w 15VJ168   568  C~2lVm      
2016 12  28.46047  03 21 02.971  +17 25 12.12  24.7w 15VJ168   568  C~2lVm      
2016 12  29.39076  03 21 01.024  +17 25 06.16  24.4w 15VJ168   568  C~2lVm      
2017 01  27.29772  03 20 21.423  +17 23 23.61  24.8w 15VJ168   568  C~2lVm      
2017 09  15.58856  03 27 25.185  +17 52 38.80  24.5w 15VJ168   568  C~2lVm      
2017 09  17.60038  03 27 22.433  +17 52 29.07  24.7w 15VJ168   568  C~2lVm      
2017 09  22.57478  03 27 14.761  +17 52 02.29  24.7w 15VJ168   568  C~2lVm      
2017 09  23.57901  03 27 13.076  +17 51 56.29  24.6w 15VJ168   568  C~2lVm      
2017 09  23.58734  03 27 13.059  +17 51 56.24        15VJ168   568  C~2lVm      
2017 09  24.59522  03 27 11.304  +17 51 50.21  24.6w 15VJ168   568  C~2lVm      
2017 12  13.42791  03 23 33.216  +17 39 27.91  23.9w 15VJ168   568  C~2lVm      

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     0.00       0.00    -0.00
     2   0.0494   -116.98    -0.11      -1.01     0.04
     3   0.1313   -850.32     0.05       2.00    -0.02
     4   0.1314   -852.51    -0.06       2.12     0.08
     5   0.2129  -2057.35    -0.06      16.00    -0.04
     6   0.2131  -2060.10     0.08      15.90    -0.21
     7   0.2131  -2060.71    -0.21      16.16     0.05
     8   0.2133  -2063.61     0.05      16.16    -0.01
     9   0.2161  -2109.18     0.10      16.88    -0.01
    10   0.2434  -2561.33     0.06      24.96     0.05
    11   0.2436  -2565.41     0.05      25.02     0.03
    12   0.2950  -3392.42    -0.00      44.48     0.04
    13   0.2954  -3398.01     0.11      44.61    -0.01
    14   0.3635  -4300.70    -0.16      78.46    -0.06
    15   0.3827  -4489.82     0.12      89.32    -0.14
    16   0.3851  -4510.73    -0.05      90.75    -0.07
    17   0.4620  -4866.06     0.12     138.35     0.15
    18   0.4620  -4866.36    -0.18     138.20    -0.00
    19   0.4783  -4855.97     0.02     148.59     0.03
    20   1.0515   1621.33    -0.01     305.10     0.02
    21   1.1034   1223.66     0.01     307.26     0.01
    22   1.1389    813.58     0.01     310.63    -0.02
    23   1.1391    810.99     0.01     310.75     0.07
    24   1.2044   -152.67     0.07     322.42    -0.04
    25   1.2098   -240.18     0.03     323.76    -0.04
    26   1.3577  -2470.73     0.03     382.43     0.07
    27   1.3602  -2499.20     0.04     383.75     0.05
    28   1.4393  -3073.55    -0.07     428.89     0.06
    29   2.0726   3231.21     0.01     610.59     0.08
    30   2.0781   3190.73     0.02     610.82    -0.03
    31   2.0917   3077.95    -0.03     611.82     0.02
    32   2.0945   3053.15     0.05     611.93    -0.08
    33   2.0945   3052.90     0.02     611.94    -0.08
    34   2.0972   3027.13    -0.08     612.26     0.02
    35   2.3158   -175.23    -0.04     667.80    -0.04

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.

15VJ168    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        60.033    60.264    59.810
ecceobj         0.361     0.365     0.356
incobj          9.869     9.868     9.869
qmin           37.102    37.116    37.241
qmax           83.323    83.742    82.657
amean          59.664    59.843    59.413
amin           58.994    59.112    58.754
amax           60.536    60.779    60.292
emean           0.364     0.363     0.360
emin            0.353     0.349     0.349
emax            0.376     0.379     0.372
imean           8.728     9.643     8.745
imin            8.237     8.690     8.251
imax            9.238    10.507     9.230
excite_mean     0.394     0.400     0.391
fracstop        1.000     1.000     1.000
cjmean          3.096     3.092     3.097

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       186.2     188.3     190.4
kozaiamp        180.0     179.9     179.9