Orbit Fit and Astrometric record for 15VX168

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: 15VX168   
# Created Tue Apr  1 01:10:40 2025
# Orbit generated from Bernstein formalism
# Fitting     46 observations of     46
# Arc:   3.08y
# First observation: 2014/11/17
#  Last observation: 2017/12/16
Preliminary a, adot, b, bdot, g, gdot:
  -0.000032   0.021574  -0.000000   0.000905   0.023067   0.000000
# Chi-squared of fit:    11.29 DOF:     86 RMS:  0.09
# Min/Max residuals:    -0.31    0.22
# Exact a, adot, b, bdot, g, gdot:
  1.461449E-05  2.165194E-02  2.118659E-06  9.087822E-04  2.317570E-02 -3.784037E-04
# Covariance matrix:
  2.3862E-13 -2.5742E-13  4.1657E-15 -7.8204E-15 -1.2687E-13 -2.8875E-12
 -2.5742E-13  3.9137E-13 -7.6604E-15  1.4516E-14  2.1425E-13  5.3506E-12
  4.1657E-15 -7.6604E-15  1.3638E-13 -7.1815E-14 -4.8240E-15 -1.1972E-13
 -7.8204E-15  1.4516E-14 -7.1815E-14  4.9769E-14  8.5922E-15  2.2788E-13
 -1.2687E-13  2.1425E-13 -4.8240E-15  8.5922E-15  2.1270E-13  3.2029E-12
 -2.8875E-12  5.3506E-12 -1.1972E-13  2.2788E-13  3.2029E-12  8.3933E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.136388   47.433062   -0.121316   -0.019328   -0.981819  2456978.792408
# Heliocentric elements and errors
Epoch:              2456970.5000  =  2014/11/09
Mean Anomaly:          218.48727 +/-     0.670
Argument of Peri:      118.65048 +/-     0.669
Long of Asc Node:       72.36219 +/-     0.005
Inclination:             2.65047 +/-     0.001
Eccentricity:         0.02818927 +/-    0.0003
Semi-Major Axis:     43.16471792 +/-    0.0024
Time of Perihelion: 2497688.3474 +/-     192.8
Perihelion:          41.94793598 +/-    0.0112
Aphelion:            44.38149986 +/-    0.0112
Period (y)              283.5970 +/-      0.02
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           29.75402024 +/-    0.0006
Ecliptic Y           32.57900040 +/-    0.0006
Ecliptic Z           -0.85566554 +/-    0.0000
Ecliptic XDOT        -0.00191689 +/-    0.0000
Ecliptic YDOT         0.00169394 +/-    0.0000
Ecliptic ZDOT         0.00010833 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   44.12964028 +/-    0.0006
Geocenter to KBO     43.14864235 +/-    0.0009
# Hcoef:  8.08

The following table shows the complete astrometric record for 15VX168. 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 (15VX168) followed by the observatory code and reference code for the source of the astrometry.

2014 11  17.29163  03 01 12.325  +15 56 39.84  24.7r 15VX168   568  C~2nvz      
2014 11  17.40051  03 01 11.799  +15 56 38.15  24.5r 15VX168   568  C~2nvz      
2014 11  17.51464  03 01 11.247  +15 56 36.10  23.9r 15VX168   568  C~2nvz      
2014 11  19.30670  03 01 02.905  +15 56 02.27  24.5r 15VX168   568  C~2nvz      
2014 11  23.41007  03 00 43.948  +15 54 46.02  24.5r 15VX168   568  C~2nvz      
2015 08  11.62323  03 10 36.643  +16 39 10.17  24.4w 15VX168   568  C~2nvz      
2015 09  07.53281  03 10 28.269  +16 38 10.51  24.8w 15VX168   568  C~2nvz      
2015 09  12.52956  03 10 19.731  +16 37 32.05  24.8w 15VX168   568  C~2nvz      
2015 10  07.47166  03 09 08.607  +16 32 30.75  24.6w 15VX168   568  C~2nvz      
2015 10  08.47583  03 09 04.861  +16 32 15.40  24.6w 15VX168   568  C~2nvz      
2015 10  08.53403  03 09 04.641  +16 32 14.44  24.8w 15VX168   568  C~2nvz      
2015 11  06.29151  03 06 59.758  +16 23 48.54  24.6r 15VX168   568  C~2nvz      
2015 11  06.35485  03 06 59.460  +16 23 47.30  24.6r 15VX168   568  C~2nvz      
2015 11  06.42547  03 06 59.127  +16 23 45.90  24.5r 15VX168   568  C~2nvz      
2015 11  06.49480  03 06 58.786  +16 23 44.57  24.4r 15VX168   568  C~2nvz      
2015 11  07.51356  03 06 53.974  +16 23 25.43  24.5w 15VX168   568  C~2nvz      
2015 11  17.27960  03 06 07.671  +16 20 21.85  24.6w 15VX168   568  C~2nvz      
2015 12  06.40765  03 04 41.214  +16 14 45.07  24.6w 15VX168   568  C~2nvz      
2015 12  13.34220  03 04 13.114  +16 12 58.46  24.5w 15VX168   568  C~2nvz      
2015 12  13.40075  03 04 12.894  +16 12 57.61  24.8w 15VX168   568  C~2nvz      
2016 01  01.39556  03 03 10.566  +16 09 09.90  24.9w 15VX168   568  C~2nvz      
2016 01  07.34177  03 02 56.462  +16 08 22.19  24.9w 15VX168   568  C~2nvz      
2016 02  04.27190  03 02 31.735  +16 07 35.50  25.0w 15VX168   568  C~2nvz      
2016 02  10.26162  03 02 35.901  +16 08 05.28  24.8w 15VX168   568  C~2nvz      
2016 09  07.55050  03 15 19.556  +17 00 35.86        15VX168   568  C~2nvz      
2016 09  26.61279  03 14 36.812  +16 57 35.97  24.7w 15VX168   568  C~2nvz      
2016 10  10.42589  03 13 49.477  +16 54 24.62  25.2w 15VX168   568  C~2nvz      
2016 10  10.48430  03 13 49.247  +16 54 23.80  24.9w 15VX168   568  C~2nvz      
2016 10  10.50790  03 13 49.143  +16 54 23.38  24.7w 15VX168   568  C~2nvz      
2016 10  27.51417  03 12 37.157  +16 49 38.65  24.8w 15VX168   568  C~2nvz      
2016 10  27.52577  03 12 37.112  +16 49 38.57  24.4w 15VX168   568  C~2nvz      
2016 11  03.53920  03 12 04.609  +16 47 31.40  24.7w 15VX168   568  C~2nvz      
2016 11  03.55078  03 12 04.547  +16 47 31.15  24.5w 15VX168   568  C~2nvz      
2016 12  28.39306  03 08 11.720  +16 32 55.63  25.2w 15VX168   568  C~2nw0      
2016 12  28.40104  03 08 11.699  +16 32 55.58  25.3w 15VX168   568  C~2nw0      
2016 12  29.35861  03 08 08.902  +16 32 45.87  25.0w 15VX168   568  C~2nw0      
2016 12  29.36878  03 08 08.879  +16 32 45.70  24.8w 15VX168   568  C~2nw0      
2017 01  01.25561  03 08 00.875  +16 32 18.07  24.2w 15VX168   568  C~2nw0      
2017 01  01.26608  03 08 00.843  +16 32 17.98  24.4w 15VX168   568  C~2nw0      
2017 01  02.36563  03 07 57.938  +16 32 08.25  25.1w 15VX168   568  C~2nw0      
2017 01  02.37586  03 07 57.912  +16 32 08.13  24.9w 15VX168   568  C~2nw0      
2017 01  26.27054  03 07 20.625  +16 30 21.90  24.8w 15VX168   568  C~2nw0      
2017 09  15.60092  03 19 59.739  +17 21 43.74  24.6w 15VX168   568  C~2nw0      
2017 09  22.58685  03 19 43.620  +17 20 38.37        15VX168   568  C~2nw0      
2017 12  16.38250  03 13 47.781  +16 58 14.34  24.4w 15VX168   568  C~2nw0      
2017 12  16.38715  03 13 47.763  +16 58 14.32  24.6w 15VX168   568  C~2nw0      

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    -0.31
     2   0.0003     -7.76     0.03       0.50     0.06
     3   0.0006    -15.97    -0.06       0.76     0.22
     4   0.0055   -140.95     0.07       1.97     0.09
     5   0.0168   -424.81     0.15       5.39    -0.05
     6   0.7319   8517.26     0.00     223.63    -0.05
     7   0.8056   8385.09     0.04     198.49     0.01
     8   0.8193   8256.34    -0.07     194.46    -0.01
     9   0.8876   7188.99     0.14     180.19    -0.05
    10   0.8903   7132.91    -0.07     179.98     0.06
    11   0.8905   7129.60    -0.05     179.92    -0.01
    12   0.9692   5261.62    -0.09     181.39     0.13
    13   0.9694   5257.16    -0.04     181.37     0.05
    14   0.9696   5252.16     0.02     181.33    -0.05
    15   0.9698   5247.07    -0.09     181.39    -0.03
    16   0.9725   5175.19     0.01     181.89     0.01
    17   0.9993   4483.60    -0.11     187.67     0.07
    18   1.0517   3193.75    -0.19     206.12    -0.22
    19   1.0706   2775.26    -0.02     215.38     0.03
    20   1.0708   2771.98     0.15     215.44    -0.01
    21   1.1228   1846.05    -0.18     245.30     0.01
    22   1.1391   1637.56     0.05     255.90     0.01
    23   1.2156   1282.32    -0.11     310.12     0.06
    24   1.2320   1348.26    -0.05     322.02     0.04
    25   1.8077  12786.31    -0.04     383.34     0.00
    26   1.8599  12145.05     0.09     371.29     0.07
    27   1.8977  11437.08     0.09     366.28    -0.04
    28   1.8979  11433.67     0.10     366.37     0.03
    29   1.8979  11432.11    -0.08     366.36     0.02
    30   1.9445  10357.27    -0.03     366.25     0.05
    31   1.9445  10356.62     0.13     366.35     0.14
    32   1.9637   9871.73    -0.00     368.21    -0.03
    33   1.9637   9870.81    -0.10     368.21    -0.04
    34   2.1139   6407.54    -0.05     425.99     0.01
    35   2.1139   6407.24     0.00     426.03     0.03
    36   2.1165   6365.86     0.02     427.61     0.05
    37   2.1166   6365.49     0.10     427.53    -0.04
    38   2.1245   6247.11     0.21     432.22    -0.14
    39   2.1245   6246.65     0.17     432.26    -0.13
    40   2.1275   6203.76     0.01     434.25    -0.02
    41   2.1275   6203.37     0.02     434.24    -0.06
    42   2.1930   5658.04    -0.02     478.02    -0.02
    43   2.8290  17015.10    -0.02     564.00    -0.06
    44   2.8482  16773.66    -0.02     560.18     0.01
    45   3.0803  11474.58    -0.09     594.60     0.04
    46   3.0803  11474.33    -0.07     594.65     0.08

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.

15VX168    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.476    43.483    43.469
ecceobj         0.020     0.020     0.020
incobj          2.647     2.647     2.647
qmin           41.157    41.126    41.173
qmax           45.355    45.351    45.341
amean          43.171    43.177    43.163
amin           42.837    42.852    42.842
amax           43.512    43.513    43.512
emean           0.024     0.025     0.024
emin            0.006     0.007     0.006
emax            0.043     0.043     0.043
imean           1.039     1.041     1.037
imin            0.000     0.000     0.000
imax            1.725     1.726     1.726
excite_mean     0.031     0.031     0.031
fracstop        1.000     1.000     1.000
cjmean          3.090     3.091     3.090

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       195.6     196.0     195.8
kozaiamp        180.0     179.9     180.0