Orbit Fit and Astrometric record for 15VS207

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: 15VS207   
# Created Mon Dec  6 02:13:44 2021
# Orbit generated from Bernstein formalism
# Fitting     11 observations of     11
# Arc:   3.06y
# First observation: 2014/10/28
#  Last observation: 2017/11/17
Preliminary a, adot, b, bdot, g, gdot:
  -0.000029   0.039324   0.000001  -0.000193   0.030438   0.000000
# Chi-squared of fit:     3.13 DOF:     16 RMS:  0.09
# Min/Max residuals:    -0.19    0.13
# Exact a, adot, b, bdot, g, gdot:
  2.099806E-05  3.919766E-02 -3.885045E-07 -1.909687E-04  2.915923E-02 -8.293435E-04
# Covariance matrix:
  1.3404E-12 -1.5470E-12 -3.2999E-15  6.1630E-15 -6.2297E-13 -9.2836E-12
 -1.5470E-12  2.9245E-12  7.3897E-15 -1.3754E-14  1.4317E-12  2.0660E-11
 -3.2999E-15  7.3897E-15  7.7179E-13 -2.8684E-13  4.9230E-15  5.6066E-14
  6.1630E-15 -1.3754E-14 -2.8684E-13  1.2863E-13 -8.3891E-15 -1.0336E-13
 -6.2297E-13  1.4317E-12  4.9230E-15 -8.3891E-15  1.5578E-12  1.1636E-11
 -9.2836E-12  2.0660E-11  5.6066E-14 -1.0336E-13  1.1636E-11  1.5402E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    1.189661   -7.165186   -0.659020    0.015661   -0.745534  2456958.658968
# Heliocentric elements and errors
Epoch:              2456950.5000  =  2014/10/20
Mean Anomaly:          359.88767 +/-     0.010
Argument of Peri:      104.92106 +/-     0.054
Long of Asc Node:      249.50434 +/-     0.024
Inclination:             1.20193 +/-     0.000
Eccentricity:         0.60028180 +/-    0.0002
Semi-Major Axis:     87.66926549 +/-    0.0372
Time of Perihelion: 2457044.0574 +/-       8.1
Perihelion:          35.04300079 +/-    0.0202
Aphelion:           140.29553019 +/-    0.0611
Period (y)              820.8792 +/-      0.52
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           34.83890186 +/-    0.0015
Ecliptic Y           -3.71387948 +/-    0.0002
Ecliptic Z            0.71196039 +/-    0.0000
Ecliptic XDOT         0.00037776 +/-    0.0000
Ecliptic YDOT         0.00365648 +/-    0.0000
Ecliptic ZDOT        -0.00001944 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   35.04352824 +/-    0.0014
Geocenter to KBO     34.29445637 +/-    0.0015
# Hcoef:  7.85

The following table shows the complete astrometric record for 15VS207. 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 (15VS207) followed by the observatory code and reference code for the source of the astrometry.

2014 10  28.15819  23 31 48.087  -01 45 03.49  22.8z 15VS207   W84  C~55XF      
2015 11  06.06654  23 39 36.595  -00 55 38.59  23.7r 15VS207   W84  C~55XF      
2015 11  07.03969  23 39 33.939  -00 55 57.97  23.2i 15VS207   W84  C~55XF      
2016 10  08.06582  23 49 41.623  +00 09 31.97  23.2i 15VS207   W84  C~55XF      
2017 08  18.30364  00 01 57.182  +01 28 02.72  23.1r 15VS207   W84  C~55XF      
2017 08  18.30501  00 01 57.184  +01 28 02.99  22.8i 15VS207   W84  C~55XF      
2017 09  27.15805  23 58 53.032  +01 08 21.23  22.7z 15VS207   W84  C~55XF      
2017 09  27.15940  23 58 53.022  +01 08 21.29  23.0i 15VS207   W84  C~55XF      
2017 09  27.16078  23 58 53.006  +01 08 21.12  23.0r 15VS207   W84  C~55XF      
2017 11  15.07268  23 55 37.773  +00 46 10.07  23.4i 15VS207   W84  C~55XF      
2017 11  17.03035  23 55 33.367  +00 45 37.57  23.6r 15VS207   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     0.05       0.00     0.06
     2   1.0237   7628.92    -0.15     -53.50     0.11
     3   1.0264   7584.61     0.00     -55.54    -0.19
     4   1.9464  17549.39     0.13     -54.10     0.00
     5   2.8067  29705.73    -0.12     -92.38    -0.17
     6   2.8067  29705.86     0.10     -92.14     0.06
     7   2.9158  26645.97     0.04     -85.85    -0.04
     8   2.9158  26645.86     0.04     -85.74     0.08
     9   2.9158  26645.57    -0.14     -85.80     0.02
    10   3.0497  23382.43    -0.01    -150.41    -0.02
    11   3.0551  23307.94     0.04    -154.13     0.09

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.

15VS207    quality flag:3

Type:        5:1EEEE   5:1EEEE   5:1EEEE

axisobj        89.630    89.738    89.521
ecceobj         0.609     0.610     0.609
incobj          1.203     1.203     1.203
qmin           34.244    34.245    34.240
qmax          146.854   146.538   146.421
amean          88.046    88.044    88.041
amin           85.940    86.042    86.152
amax           90.980    90.812    90.743
emean           0.601     0.601     0.601
emin            0.590     0.590     0.591
emax            0.614     0.614     0.614
imean           2.713     2.806     2.684
imin            2.482     2.624     2.616
imax            2.902     3.014     2.752
excite_mean     0.603     0.603     0.603
fracstop        1.000     1.000     1.000
cjmean          3.071     3.071     3.071

libcent 0       181.3     180.0     179.6
libamp  0       174.7     173.6     166.2
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       197.4     211.8     227.4
kozaiamp        180.0     180.0     106.0