Orbit Fit and Astrometric record for 15VV207

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: 15VV207   
# Created Sat Dec  4 02:13:46 2021
# Orbit generated from Bernstein formalism
# Fitting     18 observations of     18
# Arc:   3.84y
# First observation: 2015/01/13
#  Last observation: 2018/11/16
Preliminary a, adot, b, bdot, g, gdot:
  -0.001349   0.039490   0.000702   0.001349   0.032255   0.000000
# Chi-squared of fit:     7.88 DOF:     30 RMS:  0.12
# Min/Max residuals:    -0.24    0.38
# Exact a, adot, b, bdot, g, gdot:
  1.928281E-05  3.745051E-02  1.063499E-06  1.289339E-03  2.952703E-02 -5.073716E-03
# Covariance matrix:
  8.4754E-13 -7.3270E-13 -9.9824E-14  2.2411E-14 -2.8263E-13 -3.4277E-12
 -7.3270E-13  7.8864E-13  5.5143E-14 -3.4691E-14  1.6240E-13  3.8357E-12
 -9.9824E-14  5.5143E-14  3.8861E-13 -1.1846E-13  2.3921E-13  5.8755E-13
  2.2411E-14 -3.4691E-14 -1.1846E-13  7.4055E-14  2.1489E-14 -1.4752E-13
 -2.8263E-13  1.6240E-13  2.3921E-13  2.1489E-14  6.5612E-13  1.6679E-12
 -3.4277E-12  3.8357E-12  5.8755E-13 -1.4752E-13  1.6679E-12  2.1534E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
  -29.001138    5.214936   -0.939037    0.138967    0.250279  2457035.557328
# Heliocentric elements and errors
Epoch:              2457030.5000  =  2015/01/08
Mean Anomaly:          351.53145 +/-     0.009
Argument of Peri:      296.58518 +/-     0.023
Long of Asc Node:       91.33394 +/-     0.001
Inclination:            29.34944 +/-     0.000
Eccentricity:         0.40588702 +/-    0.0001
Semi-Major Axis:     55.45467659 +/-    0.0128
Time of Perihelion: 2460578.7336 +/-       3.7
Perihelion:          32.94634322 +/-    0.0105
Aphelion:            77.96300995 +/-    0.0194
Period (y)              412.9671 +/-      0.14
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           29.12468842 +/-    0.0008
Ecliptic Y            3.60286037 +/-    0.0001
Ecliptic Z          -16.41980102 +/-    0.0005
Ecliptic XDOT        -0.00067157 +/-    0.0000
Ecliptic YDOT         0.00342073 +/-    0.0000
Ecliptic ZDOT         0.00033275 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   33.62793398 +/-    0.0007
Geocenter to KBO     33.86727849 +/-    0.0009
# Hcoef:  8.27

The following table shows the complete astrometric record for 15VV207. 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 (15VV207) followed by the observatory code and reference code for the source of the astrometry.

2015 01  13.05655  01 07 52.783  -24 24 21.35  23.8r 15VV207   W84  C~55XF      
2015 11  07.25971  01 18 45.836  -24 06 31.31  23.3i 15VV207   W84  C~55XF      
2015 11  14.16438  01 18 10.244  -24 05 45.54  24.5g 15VV207   W84  C~55XF      
2015 11  14.16575  01 18 10.239  -24 05 45.30  23.8r 15VV207   W84  C~55XF      
2015 11  15.19839  01 18 05.141  -24 05 33.30  23.8g 15VV207   W84  C~55XF      
2015 11  18.18863  01 17 50.908  -24 04 52.69  24.0g 15VV207   W84  C~55XF      
2016 10  05.23216  01 30 24.427  -22 51 56.49  23.5r 15VV207   W84  C~55XF      
2016 10  05.23354  01 30 24.435  -22 51 56.59  23.3i 15VV207   W84  C~55XF      
2016 10  05.23492  01 30 24.410  -22 51 56.50  24.1g 15VV207   W84  C~55XF      
2016 11  05.25898  01 27 22.718  -23 01 15.77  23.4i 15VV207   W84  C~55XF      
2016 11  05.26035  01 27 22.710  -23 01 15.76  23.6r 15VV207   W84  C~55XF      
2016 11  05.26174  01 27 22.702  -23 01 15.64  23.4g 15VV207   W84  C~55XF      
2016 12  02.05486  01 25 17.594  -22 54 42.76  23.6i 15VV207   W84  C~55XF      
2016 12  02.05624  01 25 17.589  -22 54 42.74  23.4r 15VV207   W84  C~55XF      
2016 12  21.12126  01 24 28.529  -22 41 58.60  24.0g 15VV207   W84  C~55XF      
2018 09  09.40833  01 49 21.831  -20 13 43.57  23.5i 15VV207   W84  C~55XF      
2018 09  14.37531  01 49 00.935  -20 17 50.39  23.2g 15VV207   W84  C~55XF      
2018 11  16.02581  01 43 13.371  -20 43 59.03  23.2i 15VV207   W84  C~55XF      

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     0.16       0.00    -0.08
     2   0.8164   8483.39    -0.24   -3006.38     0.04
     3   0.8353   8068.59     0.02   -2744.89    -0.22
     4   0.8353   8068.63     0.15   -2744.65    -0.03
     5   0.8382   8011.66    -0.09   -2702.37     0.38
     6   0.8464   7855.77    -0.24   -2578.04    -0.08
     7   1.7281  19125.46    -0.02   -3477.90     0.03
     8   1.7281  19125.51     0.15   -3478.04    -0.12
     9   1.7281  19125.24     0.01   -3477.80     0.11
    10   1.8130  16626.06     0.02   -2793.48    -0.03
    11   1.8130  16625.96     0.02   -2793.41    -0.01
    12   1.8130  16625.92     0.08   -2793.26     0.09
    13   1.8864  15268.88    -0.05   -1639.50    -0.02
    14   1.8864  15268.83    -0.06   -1639.45    -0.04
    15   1.9386  15018.20     0.15    -645.71     0.00
    16   3.6560  37970.89     0.05   -2851.62    -0.04
    17   3.6696  37580.54    -0.06   -2920.85    -0.03
    18   3.8411  32411.19    -0.05   -1866.42     0.05

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.

15VV207    quality flag:3

Type:         5:2EEE    5:2EEE    5:2EEE

axisobj        56.251    56.286    56.215
ecceobj         0.414     0.414     0.414
incobj         29.364    29.364    29.364
qmin           32.381    32.553    31.668
qmax           80.050    79.650    80.894
amean          55.462    55.461    55.462
amin           54.596    54.614    54.570
amax           56.623    56.513    56.562
emean           0.402     0.390     0.413
emin            0.386     0.366     0.395
emax            0.418     0.414     0.431
imean          27.960    28.528    27.382
imin           27.551    27.756    26.843
imax           28.448    29.403    27.947
excite_mean     0.618     0.617     0.618
fracstop        1.000     1.000     1.000
cjmean          2.738     2.738     2.738

libcent 0       180.6     177.7     180.1
libamp  0       158.4     175.7     166.6
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       183.8     175.7     217.3
kozaiamp        180.0     180.0     179.9