Orbit Fit and Astrometric record for 15VB168

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: 15VB168   
# Created Sun Apr 21 01:10:13 2019
# Orbit generated from Bernstein formalism
# Fitting   37 observations of   37
# Arc:   2.27y
# First observation: 2015/09/07
#  Last observation: 2017/12/13
Preliminary a, adot, b, bdot, g, gdot:
  -0.000023   0.017946  -0.000008   0.001161   0.019439   0.000000
# Chi-squared of fit:     4.10 DOF:   68 RMS:  0.06
# Min/Max residuals:    -0.20    0.15
# Exact a, adot, b, bdot, g, gdot:
  1.435624E-05  1.761909E-02  5.588360E-07  1.129785E-03  1.923260E-02 -9.901214E-03
# Covariance matrix:
  1.5473E-13 -2.1657E-14  2.4487E-16  3.6529E-15  1.0002E-13  1.6588E-12
 -2.1657E-14  2.5468E-13 -3.8918E-15  1.9720E-14  1.5679E-13  8.8235E-12
  2.4487E-16 -3.8918E-15  9.4552E-14 -6.3560E-14 -1.8990E-15 -1.9456E-13
  3.6529E-15  1.9720E-14 -6.3560E-14  7.3328E-14  1.5831E-14  9.5363E-13
  1.0002E-13  1.5679E-13 -1.8990E-15  1.5831E-14  2.1592E-13  7.1143E-12
  1.6588E-12  8.8235E-12 -1.9456E-13  9.5363E-13  7.1143E-12  4.2653E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -2.224016   52.790781    0.939017   -0.014397   -0.374530  2457273.121609
# Heliocentric elements and errors
Epoch:              2457270.5000  =  2015/09/05
Mean Anomaly:          342.08505 +/-     0.078
Argument of Peri:       50.71790 +/-     0.022
Long of Asc Node:       82.71749 +/-     0.006
Inclination:             4.28690 +/-     0.001
Eccentricity:         0.64906642 +/-    0.0013
Semi-Major Axis:     98.94232158 +/-    0.2822
Time of Perihelion: 2475159.4431 +/-      12.7
Perihelion:          34.72218310 +/-    0.1607
Aphelion:           163.16246007 +/-    0.4822
Period (y)              984.1954 +/-      4.21
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           32.38949259 +/-    0.0008
Ecliptic Y           41.10984150 +/-    0.0010
Ecliptic Z           -2.01771668 +/-    0.0001
Ecliptic XDOT        -0.00284738 +/-    0.0000
Ecliptic YDOT         0.00039359 +/-    0.0000
Ecliptic ZDOT         0.00021546 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   52.37527545 +/-    0.0009
Geocenter to KBO     51.99505291 +/-    0.0013
# Hcoef:  6.77

The following table shows the complete astrometric record for 15VB168. 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 (15VB168) followed by the observatory code and reference code for the source of the astrometry.

2015 09  07.62082  03 23 54.456  +16 19 02.96  24.0w 15VB168   568  C~2lVl      
2015 09  12.48448  03 23 48.532  +16 18 31.93  24.0w 15VB168   568  C~2lVl      
2015 10  07.52687  03 22 52.931  +16 14 28.15  24.0w 15VB168   568  C~2lVl      
2015 10  07.58621  03 22 52.761  +16 14 27.39  24.1w 15VB168   568  C~2lVl      
2015 10  09.56611  03 22 46.777  +16 14 02.99  24.0w 15VB168   568  C~2lVl      
2015 11  06.33883  03 21 06.724  +16 07 35.24  23.4r 15VB168   568  C~2lVl      
2015 11  06.40946  03 21 06.442  +16 07 34.25  23.7r 15VB168   568  C~2lVl      
2015 11  06.47899  03 21 06.160  +16 07 33.14  23.9r 15VB168   568  C~2lVl      
2015 11  07.49597  03 21 02.115  +16 07 18.26  23.9w 15VB168   568  C~2lVl      
2015 11  17.47779  03 20 21.978  +16 04 51.50  23.9w 15VB168   568  C~2lVl      
2015 11  17.56554  03 20 21.603  +16 04 50.21  23.9w 15VB168   568  C~2lVl      
2015 12  06.34344  03 19 08.188  +16 00 33.88  24.3w 15VB168   568  C~2lVl      
2015 12  06.48092  03 19 07.668  +16 00 32.27  24.0w 15VB168   568  C~2lVl      
2015 12  31.36453  03 17 48.576  +15 56 24.25  24.0w 15VB168   568  C~2lVl      
2016 01  07.39390  03 17 32.362  +15 55 41.40  23.9w 15VB168   568  C~2lVl      
2016 02  05.29346  03 17 03.200  +15 55 21.19  24.2w 15VB168   568  C~2lVl      
2016 02  11.24684  03 17 05.318  +15 55 49.48  23.9w 15VB168   568  C~2lVl      
2016 09  07.57941  03 27 56.537  +16 37 56.60  24.2w 15VB168   568  C~2lVl      
2016 09  27.51468  03 27 21.884  +16 35 18.96  23.7w 15VB168   568  C~2lVl      
2016 09  27.51883  03 27 21.878  +16 35 18.89  23.9w 15VB168   568  C~2lVl      
2016 09  29.49059  03 27 17.008  +16 34 58.61  24.1w 15VB168   568  C~2lVl      
2016 10  05.49370  03 27 00.769  +16 33 52.08  24.4w 15VB168   568  C~2lVl      
2016 10  07.49825  03 26 54.887  +16 33 28.70  24.1w 15VB168   568  C~2lVl      
2016 10  07.59395  03 26 54.590  +16 33 27.49  24.1w 15VB168   568  C~2lVl      
2016 10  09.49835  03 26 48.803  +16 33 04.47  24.0w 15VB168   568  C~2lVl      
2016 10  09.57103  03 26 48.578  +16 33 03.60  24.1w 15VB168   568  C~2lVl      
2016 11  02.48525  03 25 22.907  +16 27 38.47  24.1w 15VB168   568  C~2lVl      
2016 11  04.46126  03 25 15.063  +16 27 09.76  23.8w 15VB168   568  C~2lVl      
2016 12  28.45409  03 21 54.419  +16 16 00.08  24.0w 15VB168   568  C~2lVl      
2017 01  27.30287  03 21 02.640  +16 14 13.78  24.4w 15VB168   568  C~2lVl      
2017 01  27.30860  03 21 02.630  +16 14 13.79  24.3w 15VB168   568  C~2lVl      
2017 09  15.58250  03 31 55.226  +16 56 11.42        15VB168   568  C~2lVl      
2017 09  22.56874  03 31 42.769  +16 55 16.60  24.0w 15VB168   568  C~2lVl      
2017 12  13.38599  03 26 50.046  +16 37 54.16  23.8w 15VB168   568  C~2lVl      
2017 12  13.39528  03 26 50.022  +16 37 53.94  23.9w 15VB168   568  C~2lVl      
2017 12  13.42326  03 26 49.913  +16 37 53.55  23.7w 15VB168   568  C~2lVl      
2017 12  13.43255  03 26 49.879  +16 37 53.55  23.9w 15VB168   568  C~2lVl      

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     0.03       0.00     0.08
  2   0.0133    -90.34     0.04      -8.66    -0.05
  3   0.0819   -926.51     0.01     -43.42     0.07
  4   0.0820   -929.07     0.14     -43.54    -0.00
  5   0.0875  -1018.62    -0.01     -45.44     0.03
  6   0.1635  -2511.29    -0.07     -55.98    -0.04
  7   0.1637  -2515.47    -0.02     -55.90    -0.01
  8   0.1639  -2519.68    -0.05     -55.95    -0.09
  9   0.1667  -2579.85     0.04     -55.53     0.05
 10   0.1940  -3176.71     0.09     -50.30     0.00
 11   0.1942  -3182.27    -0.14     -50.17     0.06
 12   0.2456  -4271.31    -0.02     -27.54     0.01
 13   0.2460  -4278.98    -0.01     -27.18     0.13
 14   0.3142  -5445.63    -0.07      26.30     0.10
 15   0.3334  -5682.80    -0.03      45.24    -0.03
 16   0.4125  -6094.72     0.06     134.44    -0.04
 17   0.4288  -6057.86     0.07     153.87    -0.00
 18   1.0019   3654.92     0.00     233.80    -0.02
 19   1.0565   3133.20    -0.05     203.61    -0.00
 20   1.0565   3133.10     0.00     203.57    -0.05
 21   1.0619   3060.23    -0.04     201.17     0.00
 22   1.0784   2817.52     0.06     194.31    -0.20
 23   1.0839   2729.78     0.05     192.54    -0.01
 24   1.0841   2725.34    -0.03     192.42    -0.06
 25   1.0893   2639.01    -0.09     190.68    -0.05
 26   1.0895   2635.66    -0.02     190.64    -0.05
 27   1.1550   1361.29     0.02     181.26     0.01
 28   1.1604   1244.85     0.03     181.55    -0.02
 29   1.3082  -1718.65    -0.06     258.24     0.00
 30   1.3900  -2466.97     0.07     344.46    -0.01
 31   1.3900  -2467.10    -0.02     344.51     0.02
 32   2.0232   7248.72    -0.00     461.59     0.06
 33   2.0423   7061.79     0.00     451.47    -0.04
 34   2.2663   2727.94    -0.03     466.99     0.15
 35   2.2663   2727.56     0.09     466.86     0.01
 36   2.2664   2725.94    -0.02     466.87    -0.04
 37   2.2664   2725.47     0.00     466.99     0.06

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.

15VB168    quality flag:2

Type:       SCATNEAR  6:1EEEEE  SCATNEAR

axisobj       100.018   100.830    99.223
ecceobj         0.649     0.653     0.645
incobj          4.280     4.280     4.280
qmin           33.873    33.843    34.021
qmax          178.761   170.272   173.086
amean         101.757    99.420    94.026
amin           93.762    97.422    87.841
amax          106.836   102.509   104.020
emean           0.657     0.650     0.628
emin            0.626     0.641     0.599
emax            0.673     0.661     0.664
imean           3.250     3.004     3.273
imin            2.743     2.910     2.756
imax            3.778     3.063     3.881
excite_mean     0.659     0.652     0.630
fracstop        1.000     1.000     1.000
cjmean          3.063     3.061     3.066

libcent 0      -180.0      78.0    -180.0
libamp  0      -180.0      40.8    -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       154.0      64.7     178.6
kozaiamp        179.9      17.1     180.0