Orbit Fit and Astrometric record for 15VP164

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: 15VP164   
# Created Thu Dec  9 02:13:33 2021
# Orbit generated from Bernstein formalism
# Fitting     29 observations of     29
# Arc:   2.09y
# First observation: 2015/08/20
#  Last observation: 2017/09/22
Preliminary a, adot, b, bdot, g, gdot:
  -0.000194   0.035476  -0.000024  -0.003222   0.030837   0.000000
# Chi-squared of fit:     7.22 DOF:     52 RMS:  0.09
# Min/Max residuals:    -0.23    0.22
# Exact a, adot, b, bdot, g, gdot:
  1.720910E-05  3.504982E-02 -1.573364E-06 -3.216492E-03  3.052810E-02  8.159042E-03
# Covariance matrix:
  2.5156E-13 -2.1399E-14  4.2628E-15 -1.0718E-14  1.8058E-13  1.7790E-12
 -2.1399E-14  4.1856E-13  1.1307E-14 -4.1244E-14  2.2516E-13  6.7597E-12
  4.2628E-15  1.1307E-14  1.1930E-13 -9.6737E-14  1.0304E-14  2.6531E-13
 -1.0718E-14 -4.1244E-14 -9.6737E-14  1.3566E-13 -3.2362E-14 -9.6550E-13
  1.8058E-13  2.2516E-13  1.0304E-14 -3.2362E-14  3.0860E-13  5.3282E-12
  1.7790E-12  6.7597E-12  2.6531E-13 -9.6550E-13  5.3282E-12  1.5825E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.811063   54.166263    1.013244   -0.000612   -0.052471  2457255.045359
# Heliocentric elements and errors
Epoch:              2457250.5000  =  2015/08/16
Mean Anomaly:           38.77051 +/-     0.016
Argument of Peri:      126.92234 +/-     0.041
Long of Asc Node:      223.64220 +/-     0.001
Inclination:             5.30024 +/-     0.001
Eccentricity:         0.25093899 +/-    0.0004
Semi-Major Axis:     39.17146818 +/-    0.0077
Time of Perihelion: 2447606.6116 +/-       2.9
Perihelion:          29.34181935 +/-    0.0150
Aphelion:            49.00111701 +/-    0.0169
Period (y)              245.1675 +/-      0.07
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           20.02318321 +/-    0.0004
Ecliptic Y           26.00299186 +/-    0.0005
Ecliptic Z           -0.46370609 +/-    0.0000
Ecliptic XDOT        -0.00212444 +/-    0.0000
Ecliptic YDOT         0.00242373 +/-    0.0000
Ecliptic ZDOT        -0.00029874 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   32.82222531 +/-    0.0004
Geocenter to KBO     32.75670177 +/-    0.0006
# Hcoef:  8.91

The following table shows the complete astrometric record for 15VP164. 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 (15VP164) followed by the observatory code and reference code for the source of the astrometry.

2015 08  20.54457  03 28 01.146  +18 01 37.41  24.3w 15VP164   568  C~2lVX      
2015 08  20.55007  03 28 01.140  +18 01 37.32  24.6w 15VP164   568  C~2lVX      
2015 09  12.44733  03 27 51.019  +17 59 42.90  24.2w 15VP164   568  C~2lVX      
2015 10  09.53675  03 26 22.398  +17 52 55.58  23.6w 15VP164   568  C~2lVX      
2015 11  06.31257  03 23 50.463  +17 42 25.87  24.1r 15VP164   568  C~2lVX      
2015 11  06.37589  03 23 50.062  +17 42 24.21  24.2r 15VP164   568  C~2lVX      
2015 11  06.44667  03 23 49.627  +17 42 22.85  24.1r 15VP164   568  C~2lVX      
2015 11  07.46686  03 23 43.390  +17 41 57.37  24.0w 15VP164   568  C~2lVX      
2015 11  17.44798  03 22 41.709  +17 37 48.32  24.1w 15VP164   568  C~2lVX      
2015 11  17.49527  03 22 41.398  +17 37 47.18  24.0w 15VP164   568  C~2lVX      
2015 12  06.31417  03 20 48.412  +17 30 14.51  24.1w 15VP164   568  C~2lVX      
2015 12  06.44064  03 20 47.695  +17 30 11.58  24.3w 15VP164   568  C~2lVX      
2015 12  06.44787  03 20 47.626  +17 30 11.43  24.3w 15VP164   568  C~2lVX      
2015 12  31.33561  03 18 47.950  +17 22 15.41  24.3w 15VP164   568  C~2lVX      
2016 01  07.36493  03 18 24.141  +17 20 40.93  24.4w 15VP164   568  C~2lVX      
2016 01  07.41708  03 18 23.973  +17 20 40.17  24.7w 15VP164   568  C~2lVX      
2016 09  25.62123  03 35 42.717  +18 15 10.72  24.2w 15VP164   568  C~2lVX      
2016 10  10.56080  03 34 44.810  +18 11 02.07  24.6w 15VP164   568  C~2lVX      
2016 10  10.60927  03 34 44.576  +18 11 01.17  24.4w 15VP164   568  C~2lVX      
2016 10  28.47058  03 33 11.729  +18 04 47.68  24.3w 15VP164   568  C~2lVX      
2016 10  28.49380  03 33 11.592  +18 04 47.21  24.4w 15VP164   568  C~2lVX      
2016 10  29.53251  03 33 05.602  +18 04 23.61  24.4w 15VP164   568  C~2lVX      
2016 11  02.58549  03 32 41.806  +18 02 50.46  24.4w 15VP164   568  C~2lVX      
2016 12  24.34518  03 27 43.398  +17 43 54.30  24.5w 15VP164   568  C~2lVX      
2016 12  24.35704  03 27 43.345  +17 43 54.03  24.5w 15VP164   568  C~2lVX      
2017 01  27.31949  03 26 09.116  +17 38 08.12  24.4w 15VP164   568  C~2lVX      
2017 01  27.32464  03 26 09.107  +17 38 08.05  24.3w 15VP164   568  C~2lVX      
2017 09  15.62735  03 44 28.306  +18 33 52.16  24.2w 15VP164   568  C~2lVX      
2017 09  22.60498  03 44 13.071  +18 32 36.19  24.5w 15VP164   568  C~2lVX      

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     0.20       0.00    -0.02
     2   0.0000     -0.11     0.02      -0.07    -0.07
     3   0.0627   -168.11    -0.23     -75.63     0.19
     4   0.1369  -1494.18    -0.09    -159.21     0.01
     5   0.2129  -3752.98     0.11    -229.52    -0.08
     6   0.2131  -3758.95    -0.05    -229.70    -0.16
     7   0.2133  -3765.31     0.11    -229.46     0.20
     8   0.2161  -3858.01    -0.00    -231.81     0.02
     9   0.2434  -4774.29    -0.03    -251.51     0.02
    10   0.2435  -4778.88    -0.20    -251.49     0.11
    11   0.2951  -6457.85     0.04    -280.70    -0.04
    12   0.2954  -6468.53     0.22    -280.92    -0.16
    13   0.2954  -6469.52    -0.15    -280.82    -0.04
    14   0.3636  -8249.22    -0.05    -303.56     0.01
    15   0.3828  -8603.51     0.10    -307.29    -0.01
    16   0.3830  -8606.04    -0.02    -307.40    -0.10
    17   1.1008   6584.72     0.03    -788.68     0.08
    18   1.1417   5723.53     0.08    -836.10    -0.00
    19   1.1419   5720.08    -0.02    -836.19     0.05
    20   1.1908   4344.89     0.01    -885.20    -0.01
    21   1.1908   4342.88     0.01    -885.19     0.04
    22   1.1937   4254.26    -0.02    -887.76    -0.00
    23   1.2048   3902.34    -0.00    -897.28     0.05
    24   1.3465   -506.19     0.00    -968.60     0.02
    25   1.3465   -506.99     0.01    -968.68    -0.05
    26   1.4395  -1897.42     0.01    -972.27     0.03
    27   1.4395  -1897.56    -0.06    -972.31    -0.00
    28   2.0728  14143.23    -0.01   -1411.03    -0.05
    29   2.0919  13914.04    -0.01   -1436.75    -0.02

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.

15VP164    quality flag:3

Type:           3:2E      3:2E      3:2E

axisobj        39.640    39.668    39.612
ecceobj         0.260     0.261     0.259
incobj          5.282     5.282     5.282
qmin           29.038    29.010    28.896
qmax           50.517    50.422    50.840
amean          39.456    39.456    39.456
amin           38.972    38.982    38.909
amax           40.007    39.992    40.094
emean           0.228     0.229     0.252
emin            0.194     0.196     0.235
emax            0.264     0.262     0.268
imean           8.991     8.773     6.729
imin            6.141     6.141     6.141
imax           11.016    10.773     7.369
excite_mean     0.278     0.276     0.278
fracstop        1.000     1.000     1.000
cjmean          2.964     2.964     2.963

libcent 0       181.2     180.7     181.0
libamp  0       106.4      94.9     121.2
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       158.1     165.6     189.7
kozaiamp        180.0     180.0     180.0