Orbit Fit and Astrometric record for 15VS168

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: 15VS168   
# Created Wed Dec 25 02:10:31 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     37 observations of     37
# Arc:   7.94y
# First observation: 2014/11/19
#  Last observation: 2022/10/29
# Chi-squared of fit:    11.34 DOF:     68 RMS:  0.10
# Min/Max residuals:    -0.27    0.29
# Exact a, adot, b, bdot, g, gdot:
  1.285210E-05  1.514528E-02  7.365466E-07  9.005564E-04  1.910797E-02 -1.799096E-03
# Covariance matrix:
  3.3025E-13 -2.6019E-13  1.4295E-14 -1.3720E-14 -8.7122E-14 -1.7277E-12
 -2.6019E-13  2.3853E-13 -1.3540E-14  1.3003E-14  8.0620E-14  1.6374E-12
  1.4295E-14 -1.3540E-14  7.7412E-14 -2.0543E-14 -5.4142E-15 -9.7392E-14
 -1.3720E-14  1.3003E-14 -2.0543E-14  1.1353E-14  4.8104E-15  9.3456E-14
 -8.7122E-14  8.0620E-14 -5.4142E-15  4.8104E-15  1.3755E-13  5.9939E-13
 -1.7277E-12  1.6374E-12 -9.7392E-14  9.3456E-14  5.9939E-13  1.1768E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.803734   47.781389   -0.150137   -0.013559   -0.977416  2456980.813838
# Heliocentric elements and errors
Epoch:              2456980.5000  =  2014/11/19
Mean Anomaly:          227.29721 +/-     0.049
Argument of Peri:      132.64587 +/-     0.046
Long of Asc Node:       60.97233 +/-     0.001
Inclination:             3.49639 +/-     0.000
Eccentricity:         0.17936518 +/-    0.0001
Semi-Major Axis:     46.92157414 +/-    0.0029
Time of Perihelion: 2500255.2767 +/-      17.5
Perihelion:          38.50547732 +/-    0.0068
Aphelion:            55.33767096 +/-    0.0073
Period (y)              321.4157 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           35.70556794 +/-    0.0007
Ecliptic Y           39.58050321 +/-    0.0008
Ecliptic Z           -0.73409015 +/-    0.0000
Ecliptic XDOT        -0.00178336 +/-    0.0000
Ecliptic YDOT         0.00126367 +/-    0.0000
Ecliptic ZDOT         0.00013274 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   53.31089007 +/-    0.0007
Geocenter to KBO     52.33428964 +/-    0.0010
# Hcoef:  7.04

The following table shows the complete astrometric record for 15VS168. 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 (15VS168) followed by the observatory code and reference code for the source of the astrometry.

2014 11  19.31306  03 02 12.679  +16 21 39.84  24.1r 15VS168   568  C~2nvy      
2014 11  23.41643  03 01 56.565  +16 20 35.52  24.4r 15VS168   568  C~2nvy      
2015 08  11.60566  03 09 40.628  +16 55 27.00  24.5w 15VS168   568  C~2nvy      
2015 09  06.63576  03 09 31.679  +16 54 42.12  24.1w 15VS168   568  C~2nvy      
2015 09  12.52541  03 09 22.856  +16 54 05.04  24.8w 15VS168   568  C~2nvy      
2015 10  08.47003  03 08 17.948  +16 49 40.09  24.1w 15VS168   568  C~2nvy      
2015 10  08.52822  03 08 17.755  +16 49 39.31  24.5w 15VS168   568  C~2nvy      
2015 11  06.28626  03 06 31.409  +16 42 34.10  24.3r 15VS168   568  C~2nvy      
2015 11  06.34963  03 06 31.143  +16 42 33.18  24.1r 15VS168   568  C~2nvy      
2015 11  06.42017  03 06 30.876  +16 42 32.06  24.0r 15VS168   568  C~2nvy      
2015 11  06.48956  03 06 30.587  +16 42 30.86  24.2r 15VS168   568  C~2nvy      
2015 11  07.50772  03 06 26.496  +16 42 14.68  24.4w 15VS168   568  C~2nvy      
2015 11  17.27378  03 05 47.213  +16 39 39.43  24.5w 15VS168   568  C~2nvy      
2015 11  17.32308  03 05 47.008  +16 39 38.62  24.4w 15VS168   568  C~2nvy      
2015 12  13.33636  03 04 09.766  +16 33 20.62  24.4w 15VS168   568  C~2nvy      
2015 12  13.39494  03 04 09.567  +16 33 19.88  24.4w 15VS168   568  C~2nvy      
2016 01  01.38920  03 03 15.990  +16 29 59.96  24.6w 15VS168   568  C~2nvy      
2016 01  02.35555  03 03 13.834  +16 29 52.12  24.5w 15VS168   568  C~2nvy      
2016 01  07.33598  03 03 03.665  +16 29 16.35  24.2w 15VS168   568  C~2nvy      
2016 02  03.22261  03 02 40.034  +16 28 14.91  24.7w 15VS168   568  C~2nvy      
2016 02  03.22917  03 02 40.002  +16 28 15.31  24.5w 15VS168   568  C~2nvy      
2016 02  10.25584  03 02 43.038  +16 28 37.60  24.4w 15VS168   568  C~2nvz      
2016 09  07.55628  03 12 54.743  +17 11 22.42        15VS168   568  C~2nvz      
2016 09  26.61685  03 12 16.680  +17 08 48.88  24.6w 15VS168   568  C~2nvz      
2016 10  10.43169  03 11 35.687  +17 06 06.61  24.4w 15VS168   568  C~2nvz      
2016 10  10.49031  03 11 35.485  +17 06 05.99  24.5w 15VS168   568  C~2nvz      
2016 10  27.52577  03 10 33.789  +17 02 03.77  24.7w 15VS168   568  C~2nvz      
2016 11  03.55078  03 10 06.075  +17 00 15.79  24.5w 15VS168   568  C~2nvz      
2016 12  28.39306  03 06 48.264  +16 47 42.35  25.0w 15VS168   568  C~2nvz      
2016 12  28.40104  03 06 48.247  +16 47 42.22  24.6w 15VS168   568  C~2nvz      
2016 12  29.35861  03 06 45.852  +16 47 33.59  24.6w 15VS168   568  C~2nvz      
2017 01  01.25561  03 06 38.952  +16 47 08.68  25.0w 15VS168   568  C~2nvz      
2017 01  02.36563  03 06 36.433  +16 47 00.16  24.5w 15VS168   568  C~2nvz      
2017 01  26.25322  03 06 03.609  +16 45 16.95  24.5w 15VS168   568  C~2nvz      
2022 10  29.407370 03 31 39.741  +18 41 04.44  24.1G 15VS168   G37  C~5z6x      
2022 10  29.455840 03 31 39.532  +18 41 03.40        15VS168   G37  C~5z6x      
2022 10  29.503680 03 31 39.349  +18 41 02.68        15VS168   G37  C~5z6x      

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    -0.07       0.00    -0.02
     2   0.0112      0.00     0.09       0.00    -0.03
     3   0.7263      0.00    -0.00       0.00    -0.03
     4   0.7976      0.00    -0.12       0.00     0.00
     5   0.8137      0.00    -0.03       0.00     0.03
     6   0.8848      0.00     0.03       0.00     0.03
     7   0.8849      0.00    -0.01       0.00    -0.00
     8   0.9637      0.00    -0.01       0.00     0.03
     9   0.9638      0.00    -0.14       0.00     0.10
    10   0.9640      0.00     0.17       0.00     0.10
    11   0.9642      0.00     0.08       0.00     0.00
    12   0.9670      0.00     0.02       0.00     0.02
    13   0.9937      0.00     0.10       0.00     0.01
    14   0.9939      0.00     0.03       0.00    -0.03
    15   1.0651      0.00     0.10       0.00     0.01
    16   1.0652      0.00     0.09       0.00     0.02
    17   1.1173      0.00    -0.06       0.00    -0.00
    18   1.1199      0.00     0.01       0.00    -0.09
    19   1.1335      0.00    -0.02       0.00    -0.05
    20   1.2071      0.00     0.22       0.00    -0.19
    21   1.2072      0.00    -0.27       0.00     0.19
    22   1.2264      0.00    -0.15       0.00    -0.06
    23   1.8022      0.00    -0.04       0.00     0.07
    24   1.8544      0.00     0.07       0.00    -0.17
    25   1.8922      0.00     0.03       0.00    -0.05
    26   1.8923      0.00    -0.03       0.00     0.09
    27   1.9390      0.00     0.01       0.00     0.02
    28   1.9582      0.00    -0.08       0.00     0.13
    29   2.1084      0.00    -0.04       0.00     0.03
    30   2.1084      0.00     0.02       0.00    -0.03
    31   2.1110      0.00     0.05       0.00    -0.02
    32   2.1189      0.00     0.10       0.00    -0.23
    33   2.1220      0.00    -0.01       0.00     0.12
    34   2.1874      0.00     0.04       0.00     0.04
    35   7.9428      0.00     0.15       0.00     0.29
    36   7.9429      0.00    -0.12       0.00    -0.11
    37   7.9430      0.00    -0.05       0.00    -0.18

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.

15VS168    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        47.205    47.205    47.205
ecceobj         0.171     0.171     0.171
incobj          3.486     3.486     3.486
qmin           37.831    37.841    37.829
qmax           56.512    56.484    56.559
amean          46.932    46.932    46.932
amin           46.524    46.523    46.525
amax           47.422    47.434    47.426
emean           0.176     0.176     0.176
emin            0.162     0.162     0.162
emax            0.192     0.192     0.193
imean           2.235     2.235     2.235
imin            1.673     1.673     1.673
imax            2.830     2.829     2.830
excite_mean     0.181     0.181     0.181
fracstop        1.000     1.000     1.000
cjmean          3.097     3.097     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       188.5     188.4     188.5
kozaiamp        179.9     180.0     180.0