Orbit Fit and Astrometric record for 13VT71

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: 13VT71    
# Created Fri Dec  3 02:12:16 2021
# Orbit generated from Bernstein formalism
# Fitting     18 observations of     18
# Arc:   3.13y
# First observation: 2013/11/08
#  Last observation: 2016/12/25
Preliminary a, adot, b, bdot, g, gdot:
  -0.000145   0.038346  -0.000008  -0.000437   0.032119   0.000000
# Chi-squared of fit:     4.99 DOF:     30 RMS:  0.09
# Min/Max residuals:    -0.20    0.20
# Exact a, adot, b, bdot, g, gdot:
  1.899769E-05  3.776912E-02  2.285677E-07 -4.362463E-04  3.210395E-02 -8.757313E-03
# Covariance matrix:
  1.7110E-13 -1.6997E-13  6.4613E-16 -5.9021E-16 -2.4031E-14 -9.7001E-13
 -1.6997E-13  5.6030E-13 -3.1291E-15  3.0321E-15  1.1591E-13  4.8636E-12
  6.4613E-16 -3.1291E-15  1.5199E-13 -7.3295E-14 -6.8226E-15 -2.9885E-14
 -5.9021E-16  3.0321E-15 -7.3295E-14  7.6168E-14 -3.3408E-15  3.1489E-14
 -2.4031E-14  1.1591E-13 -6.8226E-15 -3.3408E-15  2.7944E-13  1.1003E-12
 -9.7001E-13  4.8636E-12 -2.9885E-14  3.1489E-14  1.1003E-12  4.8868E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
  -11.524740   35.691336   -0.171483   -0.194571   -0.954953  2456604.741068
# Heliocentric elements and errors
Epoch:              2456600.5000  =  2013/11/04
Mean Anomaly:          323.35629 +/-     0.010
Argument of Peri:      330.47864 +/-     0.025
Long of Asc Node:      128.77541 +/-     0.002
Inclination:            11.18958 +/-     0.000
Eccentricity:         0.28853643 +/-    0.0002
Semi-Major Axis:     39.57848990 +/-    0.0050
Time of Perihelion: 2465857.7978 +/-       1.9
Perihelion:          28.15865376 +/-    0.0079
Aphelion:            50.99832604 +/-    0.0096
Period (y)              248.9987 +/-      0.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           25.47861600 +/-    0.0004
Ecliptic Y           18.51713024 +/-    0.0003
Ecliptic Z           -6.22330613 +/-    0.0001
Ecliptic XDOT        -0.00248571 +/-    0.0000
Ecliptic YDOT         0.00218301 +/-    0.0000
Ecliptic ZDOT         0.00011290 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   32.10566188 +/-    0.0004
Geocenter to KBO     31.14881904 +/-    0.0005
# Hcoef:  8.44

The following table shows the complete astrometric record for 13VT71. 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 (13VT71) followed by the observatory code and reference code for the source of the astrometry.

2013 11  08.24029  02 28 47.050  +02 31 36.53  24.2g 13VT71    W84  C~52Rr      
2013 11  08.24166  02 28 47.047  +02 31 36.56  23.3r 13VT71    W84  C~52Rr      
2013 11  08.25815  02 28 46.940  +02 31 36.19  23.2i 13VT71    W84  C~52Rr      
2013 11  23.21306  02 27 22.146  +02 26 11.51  23.2i 13VT71    W84  C~52Rr      
2013 11  23.21444  02 27 22.145  +02 26 11.92  22.7z 13VT71    W84  C~52Rr      
2013 12  01.18848  02 26 40.899  +02 24 13.84  23.9r 13VT71    W84  C~52Rr      
2013 12  20.13557  02 25 21.526  +02 22 32.71  22.8z 13VT71    W84  C~52Rr      
2013 12  20.13695  02 25 21.517  +02 22 32.92  23.0i 13VT71    W84  C~52Rr      
2014 08  19.40085  02 42 32.520  +03 54 40.92  23.2i 13VT71    W84  C~52Rr      
2014 09  30.30761  02 40 43.501  +03 33 17.26  24.2g 13VT71    W84  C~52Rr      
2014 09  30.30898  02 40 43.496  +03 33 17.47  23.7r 13VT71    W84  C~52Rr      
2014 09  30.31034  02 40 43.495  +03 33 17.24  23.4i 13VT71    W84  C~52Rr      
2014 10  21.30581  02 38 53.420  +03 21 20.66  24.1i 13VT71    W84  C~52Rr      
2015 12  15.16239  02 42 15.269  +03 43 50.33  23.4r 13VT71    W84  C~52Rr      
2015 12  15.16376  02 42 15.266  +03 43 50.21  23.3i 13VT71    W84  C~52Rr      
2015 12  17.14878  02 42 06.868  +03 43 43.32  23.5g 13VT71    W84  C~52Rr      
2016 09  13.35311  02 58 44.972  +05 04 20.88  23.5r 13VT71    W84  C~52Rr      
2016 12  25.13567  02 50 02.468  +04 24 51.84  23.2r 13VT71    W84  C~52Rr      

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    -0.09
     2   0.0000     -0.03     0.01       0.04    -0.05
     3   0.0000     -1.67    -0.09       0.21     0.04
     4   0.0410  -1309.11    -0.08     104.08    -0.20
     5   0.0410  -1308.99     0.16     104.47     0.18
     6   0.0628  -1932.11    -0.03     192.84    -0.16
     7   0.1147  -3090.49     0.03     482.45    -0.05
     8   0.1147  -3090.55     0.04     482.69     0.17
     9   0.7780  13327.24    -0.00     740.77     0.08
    10   0.8927  11363.04    -0.06      46.42    -0.04
    11   0.8927  11363.04     0.05      46.64     0.20
    12   0.8927  11362.95     0.07      46.43     0.00
    13   0.9502   9567.40     0.08    -103.37    -0.02
    14   2.0997  12872.42    -0.07     206.03     0.13
    15   2.0997  12872.34    -0.06     205.93     0.00
    16   2.1052  12750.59    -0.02     239.73    -0.14
    17   2.8477  28606.26    -0.04      80.79    -0.04
    18   3.1291  20331.51     0.10     307.96    -0.01

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.

13VT71    quality flag:3

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

axisobj        39.743    39.754    39.732
ecceobj         0.288     0.288     0.287
incobj         11.186    11.186    11.186
qmin           27.413    27.425    27.336
qmax           52.093    51.981    52.052
amean          39.454    39.454    39.455
amin           39.062    39.059    39.053
amax           39.963    39.963    39.944
emean           0.279     0.279     0.279
emin            0.256     0.256     0.255
emax            0.305     0.303     0.305
imean          10.012    10.030    10.008
imin            8.309     8.292     8.322
imax           11.311    11.404    11.266
excite_mean     0.329     0.329     0.329
fracstop        1.000     1.000     1.000
cjmean          2.928     2.928     2.928

libcent 0       178.7     180.3     179.8
libamp  0        51.6      47.5      51.6
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       211.3     203.4     215.0
kozaiamp        180.0     180.0     179.9