Orbit Fit and Astrometric record for 15VU207

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: 15VU207   
# Created Thu Dec  9 02:13:43 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     36 observations of     36
# Arc:   6.84y
# First observation: 2015/01/09
#  Last observation: 2021/11/11
# Chi-squared of fit:     6.47 DOF:     66 RMS:  0.07
# Min/Max residuals:    -0.20    0.18
# Exact a, adot, b, bdot, g, gdot:
  1.775363E-05  3.605711E-02 -1.711632E-06 -3.471878E-03  3.244268E-02 -2.097109E-03
# Covariance matrix:
  4.1259E-13 -2.2214E-13 -6.1796E-14  2.6242E-14 -9.7408E-14 -6.4840E-13
 -2.2214E-13  1.5407E-13  2.9994E-14 -2.1474E-14  2.2246E-14  4.8579E-13
 -6.1796E-14  2.9994E-14  1.5934E-13 -4.0603E-14  5.2721E-14  1.0907E-13
  2.6242E-14 -2.1474E-14 -4.0603E-14  1.7675E-14  1.1552E-15 -7.4140E-14
 -9.7408E-14  2.2246E-14  5.2721E-14  1.1552E-15  1.5056E-13  9.2209E-14
 -6.4840E-13  4.8579E-13  1.0907E-13 -7.4140E-14  9.2209E-14  1.6892E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
  -38.715844   15.382355   -0.980610    0.028984    0.035843  2457031.543468
# Heliocentric elements and errors
Epoch:              2457032.5000  =  2015/01/10
Mean Anomaly:          227.76980 +/-     0.050
Argument of Peri:       40.26900 +/-     0.046
Long of Asc Node:      114.25078 +/-     0.000
Inclination:            38.93106 +/-     0.000
Eccentricity:         0.03792570 +/-    0.0000
Semi-Major Axis:     30.01345131 +/-    0.0014
Time of Perihelion: 2479092.2455 +/-       8.7
Perihelion:          28.87517018 +/-    0.0018
Aphelion:            31.15173244 +/-    0.0019
Period (y)              164.4304 +/-      0.01
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           22.88117688 +/-    0.0003
Ecliptic Y            7.31415985 +/-    0.0001
Ecliptic Z          -19.27897553 +/-    0.0002
Ecliptic XDOT        -0.00112091 +/-    0.0000
Ecliptic YDOT         0.00284334 +/-    0.0000
Ecliptic ZDOT        -0.00011782 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   30.80137987 +/-    0.0003
Geocenter to KBO     30.82367366 +/-    0.0004
# Hcoef:  7.16

The following table shows the complete astrometric record for 15VU207. 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 (15VU207) followed by the observatory code and reference code for the source of the astrometry.

2015 01  09.04269  02 00 59.354  -29 26 25.64  22.0i 15VU207   W84  C~55XF      
2015 11  01.30570  02 15 23.531  -29 19 03.43  22.1z 15VU207   W84  C~55XF      
2015 11  14.12456  02 13 54.236  -29 20 34.14  21.8r 15VU207   W84  C~55XF      
2015 11  14.12594  02 13 54.232  -29 20 34.16  22.1g 15VU207   W84  C~55XF      
2015 11  18.11945  02 13 27.576  -29 20 11.83  22.0r 15VU207   W84  C~55XF      
2015 12  03.16306  02 11 56.260  -29 15 13.94  22.2r 15VU207   W84  C~55XF      
2015 12  04.13484  02 11 50.973  -29 14 43.23  22.6g 15VU207   W84  C~55XF      
2016 02  05.03596  02 10 16.702  -28 04 54.41  22.1i 15VU207   W84  C~55XF      
2016 09  11.20600  02 29 23.820  -27 48 50.59  22.0i 15VU207   W84  C~55XF      
2016 09  23.32660  02 28 28.418  -28 02 14.85  22.1r 15VU207   W84  C~55XF      
2016 09  24.24961  02 28 23.608  -28 03 12.11  22.4g 15VU207   W84  C~55XF      
2016 10  25.30496  02 25 06.251  -28 27 03.32  21.7z 15VU207   W84  C~55XF      
2016 12  01.20258  02 20 58.396  -28 27 27.04  22.2r 15VU207   W84  C~55XF      
2016 12  01.20393  02 20 58.386  -28 27 27.16  21.7i 15VU207   W84  C~55XF      
2016 12  29.16061  02 18 56.753  -28 06 10.55  22.3r 15VU207   W84  C~55XF      
2016 12  29.16198  02 18 56.752  -28 06 10.59  22.6g 15VU207   W84  C~55XF      
2017 01  30.07362  02 18 41.502  -27 25 38.94  22.1r 15VU207   W84  C~55XF      
2017 09  11.39919  02 38 07.616  -26 55 53.36  22.0Y 15VU207   W84  C~55XF      
2017 09  12.40216  02 38 03.909  -26 57 03.35  21.9z 15VU207   W84  C~55XF      
2017 10  19.30664  02 34 40.227  -27 31 29.26  22.1r 15VU207   W84  C~55XF      
2017 11  18.28054  02 31 11.018  -27 39 58.48  21.7i 15VU207   W84  C~55XF      
2017 11  18.28192  02 31 11.006  -27 39 58.45  22.1r 15VU207   W84  C~55XF      
2017 11  24.25298  02 30 31.594  -27 39 02.87  22.6g 15VU207   W84  C~55XF      
2017 11  26.25333  02 30 18.838  -27 38 32.34  21.9i 15VU207   W84  C~55XF      
2017 11  26.25471  02 30 18.830  -27 38 32.40  22.6g 15VU207   W84  C~55XF      
2017 11  29.19275  02 30 00.580  -27 37 36.63  22.0z 15VU207   W84  C~55XF      
2017 12  31.15925  02 27 33.674  -27 14 39.65  21.5Y 15VU207   W84  C~55XF      
2018 01  18.10678  02 27 06.009  -26 53 20.64  22.3r 15VU207   W84  C~55XF      
2018 01  21.07618  02 27 05.798  -26 49 24.42  22.0z 15VU207   W84  C~55XF      
2018 10  20.31693  02 43 18.326  -26 37 30.75  21.9z 15VU207   W84  C~55XF      
2018 11  17.27470  02 40 03.153  -26 46 32.95  21.7i 15VU207   W84  C~55XF      
2018 11  17.27608  02 40 03.141  -26 46 32.96  21.9r 15VU207   W84  C~55XF      
2018 11  17.27746  02 40 03.131  -26 46 32.99  22.7g 15VU207   W84  C~55XF      
2021 11  11.395074 03 06 15.999  -23 52 35.99  22.1w 15VU207   F52  C~5HIQ      
2021 11  11.405277 03 06 15.950  -23 52 36.45  22.0w 15VU207   F52  C~5HIQ      
2021 11  11.415444 03 06 15.860  -23 52 36.30  22.0w 15VU207   F52  C~5HIQ      

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    -0.01
     2   0.8111      0.00    -0.01       0.00     0.01
     3   0.8462      0.00    -0.01       0.00     0.02
     4   0.8462      0.00     0.08       0.00    -0.00
     5   0.8572      0.00     0.01       0.00     0.05
     6   0.8983      0.00    -0.03       0.00     0.06
     7   0.9010      0.00    -0.16       0.00     0.16
     8   1.0732      0.00     0.07       0.00     0.03
     9   1.6733      0.00     0.09       0.00    -0.01
    10   1.7065      0.00    -0.09       0.00     0.03
    11   1.7090      0.00     0.01       0.00     0.03
    12   1.7940      0.00     0.00       0.00     0.05
    13   1.8950      0.00     0.04       0.00     0.08
    14   1.8950      0.00     0.01       0.00    -0.07
    15   1.9716      0.00     0.06       0.00    -0.01
    16   1.9716      0.00     0.11       0.00    -0.14
    17   2.0589      0.00    -0.03       0.00     0.02
    18   2.6731      0.00    -0.05       0.00    -0.10
    19   2.6759      0.00     0.14       0.00    -0.20
    20   2.7769      0.00     0.02       0.00     0.07
    21   2.8590      0.00     0.01       0.00    -0.02
    22   2.8590      0.00    -0.03       0.00     0.01
    23   2.8753      0.00     0.04       0.00     0.05
    24   2.8808      0.00     0.03       0.00    -0.00
    25   2.8808      0.00     0.05       0.00    -0.09
    26   2.8888      0.00     0.06       0.00     0.01
    27   2.9764      0.00    -0.03       0.00     0.04
    28   3.0255      0.00    -0.02       0.00     0.04
    29   3.0336      0.00    -0.11       0.00    -0.04
    30   3.7790      0.00     0.03       0.00    -0.04
    31   3.8555      0.00     0.05       0.00    -0.00
    32   3.8555      0.00     0.02       0.00    -0.02
    33   3.8555      0.00     0.01       0.00    -0.05
    34   6.8401      0.00    -0.18       0.00     0.15
    35   6.8401      0.00     0.18       0.00    -0.17
    36   6.8402      0.00    -0.07       0.00     0.12

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.

15VU207    quality flag:3

Type:            1:1       1:1       1:1

axisobj        30.213    30.213    30.213
ecceobj         0.031     0.031     0.032
incobj         38.929    38.929    38.929
qmin           28.381    28.381    28.381
qmax           31.910    31.910    31.910
amean          30.108    30.108    30.108
amin           29.842    29.842    29.842
amax           30.375    30.375    30.375
emean           0.026     0.026     0.026
emin            0.001     0.001     0.001
emax            0.053     0.053     0.053
imean          37.342    37.342    37.342
imin           37.128    37.128    37.128
imax           37.549    37.549    37.549
excite_mean     0.607     0.607     0.607
fracstop        1.000     1.000     1.000
cjmean          2.591     2.591     2.591

libcent 0        58.2      58.2      58.2
libamp  0        15.4      15.4      15.4
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       174.3     174.4     174.3
kozaiamp        180.0     180.0     179.9