Orbit Fit and Astrometric record for 13VQ46

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: 13VQ46    
# Created Wed Dec  8 02:12:21 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     11 observations of     11
# Arc:   6.95y
# First observation: 2013/11/08
#  Last observation: 2020/10/20
# Chi-squared of fit:     1.86 DOF:     16 RMS:  0.07
# Min/Max residuals:    -0.12    0.15
# Exact a, adot, b, bdot, g, gdot:
  1.541532E-05  2.705009E-02  2.145808E-06  3.129949E-03  2.697449E-02  6.365361E-03
# Covariance matrix:
  6.6954E-13 -6.1156E-13  4.3060E-14 -6.5398E-14 -7.5812E-13 -2.8922E-12
 -6.1156E-13  8.2235E-13 -6.0098E-14  8.8837E-14  2.8036E-13  3.9513E-12
  4.3060E-14 -6.0098E-14  2.3128E-13 -5.3601E-14 -2.8139E-14 -2.9872E-13
 -6.5398E-14  8.8837E-14 -5.3601E-14  3.4197E-14  6.4166E-14  4.4547E-13
 -7.5812E-13  2.8036E-13 -2.8139E-14  6.4166E-14  7.3331E-12  2.6397E-12
 -2.8922E-12  3.9513E-12 -2.9872E-13  4.4547E-13  2.6397E-12  1.9777E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -6.935919   24.449409   -0.357736   -0.111275   -0.915894  2456604.713248
# Heliocentric elements and errors
Epoch:              2456604.5000  =  2013/11/08
Mean Anomaly:           68.33053 +/-     0.055
Argument of Peri:      218.59026 +/-     0.072
Long of Asc Node:       70.40907 +/-     0.001
Inclination:             9.46012 +/-     0.000
Eccentricity:         0.23725227 +/-    0.0002
Semi-Major Axis:     39.32321059 +/-    0.0164
Time of Perihelion: 2439508.9073 +/-      17.4
Perihelion:          29.99368966 +/-    0.0140
Aphelion:            48.65273152 +/-    0.0212
Period (y)              246.5935 +/-      0.15
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           34.19167625 +/-    0.0034
Ecliptic Y           15.94188676 +/-    0.0015
Ecliptic Z           -4.47676957 +/-    0.0004
Ecliptic XDOT        -0.00052376 +/-    0.0000
Ecliptic YDOT         0.00277894 +/-    0.0000
Ecliptic ZDOT         0.00023748 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   37.99006629 +/-    0.0031
Geocenter to KBO     37.07196113 +/-    0.0037
# Hcoef:  7.46

The following table shows the complete astrometric record for 13VQ46. 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 (13VQ46) followed by the observatory code and reference code for the source of the astrometry.

2013 11  08.21247  01 40 45.01   +03 01 02.1   22.9r 13VQ46    W84  C~3clY      
2013 11  08.21676  01 40 44.98   +03 01 02.0   23.1i 13VQ46    W84  C~3clY      
2014 10  21.27073  01 47 45.49   +03 51 48.0   23.0i 13VQ46    W84  C~3clY      
2014 10  28.23602  01 47 10.12   +03 48 47.3   23.1r 13VQ46    W84  C~3clY      
2014 10  29.23599  01 47 05.08   +03 48 22.4   22.9r 13VQ46    W84  C~3clY      
2014 10  29.23735  01 47 05.06   +03 48 22.2   24.4g 13VQ46    W84  C~3clY      
2014 10  29.24310  01 47 05.03   +03 48 22.2   22.7i 13VQ46    W84  C~3clY      
2014 11  17.12820  01 45 34.38   +03 41 34.5   23.5g 13VQ46    W84  C~3clY      
2015 11  18.17282  01 50 55.90   +04 23 57.6   23.4r 13VQ46    W84  C~3clY      
2020 10  20.288900 02 19 30.438  +07 57 15.83  23.2G 13VQ46    G37  C~4Kw3      
2020 10  20.341670 02 19 30.175  +07 57 14.63        13VQ46    G37  C~4Kw3      

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     0.11       0.00    -0.03
     2   0.0000      0.00    -0.03       0.00    -0.04
     3   0.9502      0.00     0.11       0.00    -0.01
     4   0.9693      0.00    -0.01       0.00     0.02
     5   0.9720      0.00     0.08       0.00     0.07
     6   0.9720      0.00    -0.12       0.00    -0.10
     7   0.9720      0.00    -0.12       0.00     0.05
     8   1.0237      0.00    -0.01       0.00    -0.07
     9   2.0259      0.00    -0.00       0.00     0.15
    10   6.9489      0.00    -0.01       0.00    -0.07
    11   6.9490      0.00     0.02       0.00     0.03

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.

13VQ46    quality flag:3

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

axisobj        39.574    39.574    39.574
ecceobj         0.241     0.241     0.241
incobj          9.461     9.461     9.461
qmin           28.868    28.869    28.866
qmax           50.739    50.748    50.737
amean          39.455    39.455    39.455
amin           38.982    38.981    38.981
amax           40.021    40.021    40.019
emean           0.238     0.238     0.238
emin            0.199     0.199     0.199
emax            0.269     0.269     0.268
imean           8.305     8.302     8.308
imin            6.426     6.425     6.428
imax           10.393    10.390    10.394
excite_mean     0.279     0.279     0.279
fracstop        1.000     1.000     1.000
cjmean          2.963     2.963     2.963

libcent 0       180.2     180.6     180.4
libamp  0        95.2      95.5      95.0
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       246.1     246.3     245.9
kozaiamp         66.2      65.5      66.5