Orbit Fit and Astrometric record for 15VY168

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: 15VY168   
# Created Thu Apr  3 01:10:44 2025
# Orbit generated from Bernstein formalism
# Fitting     29 observations of     29
# Arc:   3.06y
# First observation: 2014/11/23
#  Last observation: 2017/12/16
Preliminary a, adot, b, bdot, g, gdot:
  -0.000051   0.023899  -0.000002   0.000170   0.024274   0.000000
# Chi-squared of fit:    13.05 DOF:     52 RMS:  0.12
# Min/Max residuals:    -0.31    0.37
# Exact a, adot, b, bdot, g, gdot:
  1.515405E-05  2.398826E-02 -1.090482E-07  1.709692E-04  2.443667E-02 -2.110345E-05
# Covariance matrix:
  8.9949E-13 -9.6703E-13  6.5418E-15 -7.0256E-15 -4.4898E-13 -9.5298E-12
 -9.6703E-13  1.1919E-12 -8.3660E-15  9.4072E-15  5.4145E-13  1.2705E-11
  6.5418E-15 -8.3660E-15  2.5454E-13 -1.3138E-13 -4.7359E-15 -9.5031E-14
 -7.0256E-15  9.4072E-15 -1.3138E-13  8.4900E-14  4.3850E-15  1.0830E-13
 -4.4898E-13  5.4145E-13 -4.7359E-15  4.3850E-15  3.7936E-13  6.0391E-12
 -9.5298E-12  1.2705E-11 -9.5031E-14  1.0830E-13  6.0391E-12  1.4608E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.746384   46.996899   -0.233213   -0.029094   -0.959627  2456984.910848
# Heliocentric elements and errors
Epoch:              2456980.5000  =  2014/11/19
Mean Anomaly:            5.87158 +/-     1.252
Argument of Peri:      277.54253 +/-     1.311
Long of Asc Node:      123.61556 +/-     0.022
Inclination:             1.75640 +/-     0.000
Eccentricity:         0.02227287 +/-    0.0001
Semi-Major Axis:     42.83004006 +/-    0.0027
Time of Perihelion: 2455310.6636 +/-     356.1
Perihelion:          41.87609200 +/-    0.0047
Aphelion:            43.78398811 +/-    0.0047
Period (y)              280.3051 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           28.37858385 +/-    0.0007
Ecliptic Y           30.77577660 +/-    0.0008
Ecliptic Z           -1.24715495 +/-    0.0000
Ecliptic XDOT        -0.00197094 +/-    0.0000
Ecliptic YDOT         0.00182675 +/-    0.0000
Ecliptic ZDOT         0.00001932 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.88135435 +/-    0.0007
Geocenter to KBO     40.92211261 +/-    0.0010
# Hcoef:  8.63

The following table shows the complete astrometric record for 15VY168. 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 (15VY168) followed by the observatory code and reference code for the source of the astrometry.

2014 11  23.41007  03 00 10.679  +15 14 11.71  25.1r 15VY168   568  C~2nw0      
2015 08  11.62323  03 10 46.979  +16 00 54.42  25.0w 15VY168   568  C~2nw0      
2015 09  07.53281  03 10 39.627  +15 59 20.25  24.9w 15VY168   568  C~2nw0      
2015 09  12.52956  03 10 30.937  +15 58 34.23  25.0w 15VY168   568  C~2nw0      
2015 10  08.47583  03 09 13.656  +15 52 35.81  25.1w 15VY168   568  C~2nw0      
2015 10  08.53403  03 09 13.421  +15 52 35.03  25.2w 15VY168   568  C~2nw0      
2015 11  06.29151  03 07 03.695  +15 43 24.96  24.5r 15VY168   568  C~2nw0      
2015 11  06.35485  03 07 03.381  +15 43 23.81  24.6r 15VY168   568  C~2nw0      
2015 11  06.42547  03 07 03.046  +15 43 22.07  25.3r 15VY168   568  C~2nw0      
2015 11  06.49480  03 07 02.692  +15 43 20.85  24.5r 15VY168   568  C~2nw0      
2015 12  06.40765  03 04 39.657  +15 33 50.84  22.2w 15VY168   568  C~2nw0      
2015 12  13.34220  03 04 10.469  +15 31 59.96  25.4w 15VY168   568  C~2nw0      
2015 12  13.40075  03 04 10.238  +15 31 58.89  25.0w 15VY168   568  C~2nw0      
2016 01  07.34177  03 02 51.267  +15 27 21.05  25.2w 15VY168   568  C~2nw0      
2016 02  04.27190  03 02 26.806  +15 26 52.15  25.1w 15VY168   568  C~2nw0      
2016 09  07.55050  03 16 03.947  +16 21 24.45        15VY168   568  C~2nw0      
2016 10  10.42589  03 14 31.423  +16 14 22.26  25.5w 15VY168   568  C~2nw0      
2016 10  10.48430  03 14 31.191  +16 14 21.33  25.6w 15VY168   568  C~2nw0      
2016 10  10.50790  03 14 31.082  +16 14 21.09  25.1w 15VY168   568  C~2nw0      
2016 10  27.51417  03 13 16.438  +16 09 10.67  25.2w 15VY168   568  C~2nw0      
2016 11  03.53920  03 12 42.621  +16 06 53.66  25.9w 15VY168   568  C~2nw0      
2016 12  29.36878  03 08 37.606  +15 51 28.65  25.4w 15VY168   568  C~2nw0      
2017 01  01.26608  03 08 29.310  +15 51 01.16  25.2w 15VY168   568  C~2nw0      
2017 01  02.37586  03 08 26.253  +15 50 51.46  25.4w 15VY168   568  C~2nw0      
2017 01  26.27054  03 07 48.084  +15 49 16.37  25.5w 15VY168   568  C~2nw0      
2017 09  15.60092  03 21 16.832  +16 41 54.88  25.5w 15VY168   568  C~2nw0      
2017 09  22.58685  03 21 00.450  +16 40 38.75  23.6w 15VY168   568  C~2nw0      
2017 12  16.38250  03 14 51.482  +16 16 37.87  25.1w 15VY168   568  C~2nw0      
2017 12  16.38715  03 14 51.464  +16 16 37.79  25.4w 15VY168   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     0.08       0.00     0.05
     2   0.7152   9614.96     0.25     164.58     0.16
     3   0.7888   9487.23    -0.05     102.36     0.11
     4   0.8025   9353.88    -0.08      91.80     0.02
     5   0.8736   8181.66    -0.20      47.93     0.00
     6   0.8737   8178.18    -0.20      48.10     0.22
     7   0.9524   6224.38    -0.03      28.53    -0.04
     8   0.9526   6219.70     0.02      28.67     0.07
     9   0.9528   6214.57     0.17      28.31    -0.31
    10   0.9530   6209.32     0.12      28.54    -0.11
    11   1.0349   4064.82     0.09      48.34     0.09
    12   1.0539   3628.66    -0.15      58.39     0.11
    13   1.0540   3625.15    -0.07      58.29    -0.11
    14   1.1223   2451.11    -0.09     108.11    -0.03
    15   1.1988   2103.35    -0.02     178.83    -0.21
    16   1.7909  14359.86    -0.07     135.18    -0.06
    17   1.8809  12957.45     0.03      79.40    -0.14
    18   1.8811  12953.97     0.12      79.39    -0.11
    19   1.8812  12952.38    -0.02      79.57     0.10
    20   1.9277  11829.29     0.03      65.82     0.05
    21   1.9470  11321.53    -0.01      63.69    -0.10
    22   2.0998   7662.04     0.01     124.48     0.08
    23   2.1078   7539.20     0.37     130.56    -0.08
    24   2.1108   7494.05    -0.14     133.22     0.10
    25   2.1762   6937.48    -0.06     191.71     0.00
    26   2.8123  19055.18    -0.05     154.12     0.11
    27   2.8314  18806.06     0.04     140.96    -0.10
    28   3.0636  13273.16    -0.04     133.85     0.08
    29   3.0636  13272.89    -0.03     133.84     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.

15VY168    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.162    43.171    43.153
ecceobj         0.030     0.030     0.030
incobj          1.757     1.757     1.757
qmin           40.401    40.418    40.408
qmax           45.450    45.457    45.434
amean          42.835    42.844    42.827
amin           42.504    42.511    42.495
amax           43.171    43.185    43.168
emean           0.035     0.035     0.035
emin            0.013     0.013     0.013
emax            0.053     0.053     0.053
imean           1.742     1.740     1.744
imin            0.473     0.472     0.472
imax            2.550     2.545     2.556
excite_mean     0.047     0.047     0.046
fracstop        1.000     1.000     1.000
cjmean          3.085     3.085     3.085

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       186.0     186.1     185.5
kozaiamp        180.0     179.9     180.0