Orbit Fit and Astrometric record for 15VS167

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: 15VS167   
# Created Tue Apr 23 01:10:48 2019
# Orbit generated from Bernstein formalism
# Fitting   33 observations of   33
# Arc:   3.08y
# First observation: 2014/11/17
#  Last observation: 2017/12/16
Preliminary a, adot, b, bdot, g, gdot:
   0.000013   0.031848  -0.000004  -0.003643   0.025874   0.000000
# Chi-squared of fit:     9.62 DOF:   60 RMS:  0.10
# Min/Max residuals:    -0.24    0.37
# Exact a, adot, b, bdot, g, gdot:
  1.958656E-05  3.209501E-02 -2.210881E-06 -3.673198E-03  2.616878E-02  1.168227E-03
# Covariance matrix:
  3.1394E-13 -3.6774E-13 -1.4029E-14  2.9121E-14 -1.1520E-13 -2.8190E-12
 -3.6774E-13  5.9270E-13  2.6894E-14 -5.5790E-14  2.1878E-13  5.4012E-12
 -1.4029E-14  2.6894E-14  1.7408E-13 -9.9886E-14  1.1119E-14  2.7967E-13
  2.9121E-14 -5.5790E-14 -9.9886E-14  7.9780E-14 -2.5879E-14 -5.8321E-13
 -1.1520E-13  2.1878E-13  1.1119E-14 -2.5879E-14  2.4882E-13  2.4471E-12
 -2.8190E-12  5.4012E-12  2.7967E-13 -5.8321E-13  2.4471E-12  5.6400E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -2.907085   47.976951   -0.113533   -0.049695   -0.981671  2456978.880868
# Heliocentric elements and errors
Epoch:              2456970.5000  =  2014/11/09
Mean Anomaly:            1.69939 +/-     0.010
Argument of Peri:      197.29367 +/-     0.039
Long of Asc Node:      204.77654 +/-     0.002
Inclination:             7.11418 +/-     0.000
Eccentricity:         0.51564408 +/-    0.0001
Semi-Major Axis:     80.75751045 +/-    0.0142
Time of Perihelion: 2455719.1958 +/-       7.7
Perihelion:          39.11537836 +/-    0.0098
Aphelion:           122.39964255 +/-    0.0226
Period (y)              725.7425 +/-      0.19
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           26.11875066 +/-    0.0005
Ecliptic Y           29.15910094 +/-    0.0005
Ecliptic Z           -1.93815898 +/-    0.0000
Ecliptic XDOT        -0.00243009 +/-    0.0000
Ecliptic YDOT         0.00231909 +/-    0.0000
Ecliptic ZDOT        -0.00038990 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   39.19437159 +/-    0.0005
Geocenter to KBO     38.21347440 +/-    0.0007
# Hcoef:  9.11

The following table shows the complete astrometric record for 15VS167. 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 (15VS167) followed by the observatory code and reference code for the source of the astrometry.

2014 11  17.38009  03 05 24.312  +14 23 38.14  24.3r 15VS167   568  C~2lVj      
2014 11  17.49387  03 05 23.738  +14 23 35.65  24.9r 15VS167   568  C~2lVj      
2014 11  19.28114  03 05 14.969  +14 22 56.49  24.8r 15VS167   568  C~2lVj      
2014 11  23.38468  03 04 54.947  +14 21 28.45  24.6r 15VS167   568  C~2lVj      
2015 08  11.60150  03 17 16.821  +15 06 49.06  25.8w 15VS167   568  C~2lVj      
2015 09  06.61481  03 17 21.835  +15 04 11.63  25.2w 15VS167   568  C~2lVj      
2015 10  07.42821  03 16 05.739  +14 56 10.16  25.1w 15VS167   568  C~2lVj      
2015 11  07.34843  03 13 47.788  +14 45 05.26  24.9r 15VS167   568  C~2lVj      
2015 11  07.39058  03 13 47.584  +14 45 04.09  25.0r 15VS167   568  C~2lVk      
2015 11  07.43274  03 13 47.371  +14 45 03.18  24.9r 15VS167   568  C~2lVk      
2015 11  10.51713  03 13 32.021  +14 43 54.78  24.7w 15VS167   568  C~2lVk      
2015 11  10.54648  03 13 31.899  +14 43 54.12  25.0w 15VS167   568  C~2lVk      
2015 11  17.36382  03 12 57.873  +14 41 25.45  24.9w 15VS167   568  C~2lVk      
2015 11  17.41043  03 12 57.638  +14 41 24.55  24.9w 15VS167   568  C~2lVk      
2015 12  06.37266  03 11 27.008  +14 35 06.94  25.1w 15VS167   568  C~2lVk      
2015 12  13.30706  03 10 57.207  +14 33 09.60  25.2w 15VS167   568  C~2lVk      
2015 12  13.36559  03 10 56.977  +14 33 08.57  25.1w 15VS167   568  C~2lVk      
2016 01  01.36029  03 09 51.157  +14 29 08.02  25.3w 15VS167   568  C~2lVk      
2016 01  07.30705  03 09 36.441  +14 28 20.99  24.5w 15VS167   568  C~2lVk      
2016 02  04.34036  03 09 13.273  +14 28 04.49  25.8w 15VS167   568  C~2lVk      
2016 02  11.22942  03 09 20.045  +14 28 52.89  24.8w 15VS167   568  C~2lVk      
2016 09  07.56785  03 24 45.548  +15 19 45.79  24.8w 15VS167   568  C~2lVk      
2016 09  27.50655  03 24 05.379  +15 15 06.68  25.1w 15VS167   568  C~2lVk      
2016 10  10.44325  03 23 21.688  +15 11 10.63  25.3w 15VS167   568  C~2lVk      
2016 10  10.50202  03 23 21.449  +15 11 09.52  25.4w 15VS167   568  C~2lVk      
2016 10  10.51973  03 23 21.388  +15 11 09.11  25.3w 15VS167   568  C~2lVk      
2016 11  02.50837  03 21 39.634  +15 03 08.94  25.0w 15VS167   568  C~2lVk      
2016 11  04.48449  03 21 29.981  +15 02 26.22  25.3w 15VS167   568  C~2lVk      
2016 12  24.31885  03 17 41.470  +14 47 20.69  25.4w 15VS167   568  C~2lVk      
2017 01  02.42106  03 17 13.073  +14 45 48.08  25.2w 15VS167   568  C~2lVk      
2017 09  15.57020  03 31 59.968  +15 33 08.73  25.6w 15VS167   568  C~2lVk      
2017 09  21.61548  03 31 48.201  +15 31 45.92  25.1w 15VS167   568  C~2lVk      
2017 12  16.34460  03 25 41.069  +15 05 05.04  25.3w 15VS167   568  C~2lVk      

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    -0.00
  2   0.0003     -8.70    -0.06      -0.10     0.03
  3   0.0052   -141.97     0.09      -2.71    -0.06
  4   0.0164   -445.90    -0.18      -7.27    -0.04
  5   0.7316  10660.70     0.05    -280.75     0.12
  6   0.8028  10689.59     0.01    -451.94     0.14
  7   0.8872   9496.43    -0.05    -626.84    -0.04
  8   0.9719   7388.01     0.02    -738.31     0.07
  9   0.9720   7384.84     0.07    -738.65    -0.19
 10   0.9721   7381.62     0.08    -738.71    -0.16
 11   0.9805   7148.48    -0.00    -745.36    -0.13
 12   0.9806   7146.60     0.37    -745.52    -0.24
 13   0.9993   6630.59    -0.01    -757.16    -0.02
 14   0.9994   6627.06     0.04    -757.11     0.07
 15   1.0513   5257.51    -0.07    -768.68     0.04
 16   1.0703   4808.98    -0.04    -765.38     0.16
 17   1.0705   4805.48     0.16    -765.47     0.00
 18   1.1225   3819.81    -0.11    -739.32     0.01
 19   1.1387   3601.26     0.02    -726.80     0.02
 20   1.2155   3272.76     0.01    -651.56     0.14
 21   1.2344   3380.58     0.04    -631.61     0.06
 22   1.8075  17166.00    -0.14   -1209.75    -0.00
 23   1.8621  16528.71    -0.08   -1332.06     0.05
 24   1.8975  15852.89    -0.04   -1398.94     0.02
 25   1.8977  15849.24    -0.15   -1399.13     0.09
 26   1.8977  15848.28    -0.05   -1399.30    -0.01
 27   1.9607  14292.64    -0.05   -1485.17     0.00
 28   1.9661  14145.83     0.04   -1490.40    -0.03
 29   2.1025  10699.50    -0.09   -1503.57     0.05
 30   2.1274  10276.66     0.00   -1484.86     0.02
 31   2.8287  23510.43     0.16   -2008.87    -0.06
 32   2.8453  23322.86     0.03   -2047.44    -0.09
 33   3.0800  17724.39    -0.01   -2269.55     0.01

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.

15VS167    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        82.213    82.264    82.163
ecceobj         0.524     0.524     0.524
incobj          7.090     7.090     7.090
qmin           38.167    38.155    38.128
qmax          125.467   125.553   125.432
amean          80.538    80.546    80.540
amin           79.350    79.392    79.394
amax           82.294    82.264    82.232
emean           0.515     0.515     0.515
emin            0.505     0.505     0.505
emax            0.525     0.527     0.526
imean           7.287     7.238     7.287
imin            6.894     6.828     6.917
imax            7.625     7.571     7.679
excite_mean     0.530     0.530     0.530
fracstop        1.000     1.000     1.000
cjmean          3.155     3.155     3.155

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       180.8     184.0     183.0
kozaiamp        180.0     180.0     180.0