Orbit Fit and Astrometric record for 13VU71

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: 13VU71    
# Created Tue Nov 30 02:12:21 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     17 observations of     17
# Arc:   5.06y
# First observation: 2013/11/08
#  Last observation: 2018/12/01
# Chi-squared of fit:     6.34 DOF:     28 RMS:  0.11
# Min/Max residuals:    -0.28    0.25
# Exact a, adot, b, bdot, g, gdot:
  1.979290E-05  3.607713E-02 -2.198324E-06 -3.386082E-03  2.803068E-02 -8.689244E-03
# Covariance matrix:
  4.9573E-13 -4.4321E-13 -2.9013E-14  3.4343E-14  1.1940E-13 -1.9675E-12
 -4.4321E-13  6.6443E-13  5.1370E-14 -5.9471E-14 -2.3763E-13  3.3994E-12
 -2.9013E-14  5.1370E-14  2.8672E-13 -8.0351E-14 -3.1458E-14  2.7344E-13
  3.4343E-14 -5.9471E-14 -8.0351E-14  3.4117E-14  2.3027E-14 -3.1785E-13
  1.1940E-13 -2.3763E-13 -3.1458E-14  2.3027E-14  4.0827E-13 -1.2393E-12
 -1.9675E-12  3.3994E-12  2.7344E-13 -3.1785E-13 -1.2393E-12  1.8177E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
  -13.246938   28.547161   -0.291546   -0.216547   -0.920489  2456604.752448
# Heliocentric elements and errors
Epoch:              2456604.5000  =  2013/11/08
Mean Anomaly:          354.76759 +/-     0.003
Argument of Peri:      281.64821 +/-     0.018
Long of Asc Node:      141.12168 +/-     0.001
Inclination:            13.89264 +/-     0.000
Eccentricity:         0.66432586 +/-    0.0001
Semi-Major Axis:    101.94004868 +/-    0.0322
Time of Perihelion: 2462068.5511 +/-     175.6
Perihelion:          34.21863858 +/-    0.0143
Aphelion:           169.66145878 +/-    0.0544
Period (y)             1029.2609 +/-      0.49
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           31.19441754 +/-    0.0007
Ecliptic Y           17.30589276 +/-    0.0004
Ecliptic Z           -8.17504888 +/-    0.0002
Ecliptic XDOT        -0.00248238 +/-    0.0000
Ecliptic YDOT         0.00266265 +/-    0.0000
Ecliptic ZDOT        -0.00012731 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   36.59821690 +/-    0.0006
Geocenter to KBO     35.67541092 +/-    0.0008
# Hcoef:  8.20

The following table shows the complete astrometric record for 13VU71. 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 (13VU71) followed by the observatory code and reference code for the source of the astrometry.

2013 11  08.25167  02 04 49.114  -01 26 39.87  23.7r 13VU71    W84  C~52Rr      
2013 11  13.19469  02 04 25.664  -01 28 18.92  22.9z 13VU71    W84  C~52Rr      
2013 12  28.11269  02 01 56.896  -01 31 03.03  23.8r 13VU71    W84  C~52Rr      
2014 10  21.25060  02 14 25.410  -00 46 00.09  24.0r 13VU71    W84  C~52Rr      
2014 12  16.13344  02 10 21.412  -01 00 19.35  23.9r 13VU71    W84  C~52Rr      
2014 12  16.13481  02 10 21.429  -01 00 19.15  23.0i 13VU71    W84  C~52Rr      
2016 09  24.27213  02 32 56.766  +00 35 41.13  23.5r 13VU71    W84  C~52Rr      
2016 09  27.42933  02 32 44.89   +00 33 53.4   24.2g 13VU71    568  C~2eAH      
2016 09  27.54907  02 32 44.42   +00 33 49.3   24.6g 13VU71    568  C~2eAH      
2016 09  28.51053  02 32 40.67   +00 33 16.7   24.5g 13VU71    568  C~2eAH      
2016 09  28.55797  02 32 40.47   +00 33 15.0   24.4g 13VU71    568  C~2eAH      
2016 09  29.44983  02 32 36.94   +00 32 44.7   24.4g 13VU71    568  C~2eAH      
2017 10  29.29380  02 38 45.941  +00 51 31.29  24.1g 13VU71    W84  C~52Rr      
2017 12  08.04622  02 35 33.969  +00 40 12.80  23.8r 13VU71    W84  C~52Rr      
2018 11  16.14956  02 45 49.315  +01 19 18.22  23.1i 13VU71    W84  C~52Rr      
2018 12  01.08313  02 44 36.286  +01 15 36.65  23.9r 13VU71    W84  C~52Rr      
2018 12  01.08452  02 44 36.262  +01 15 36.72  24.1g 13VU71    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     0.09       0.00     0.10
     2   0.0135      0.00    -0.14       0.00    -0.28
     3   0.1365      0.00    -0.06       0.00     0.17
     4   0.9500      0.00     0.02       0.00    -0.03
     5   1.1030      0.00    -0.07       0.00    -0.10
     6   1.1030      0.00     0.25       0.00     0.10
     7   2.8775      0.00     0.18       0.00     0.08
     8   2.8862      0.00    -0.09       0.00     0.02
     9   2.8865      0.00    -0.01       0.00    -0.01
    10   2.8891      0.00     0.04       0.00     0.09
    11   2.8893      0.00    -0.09       0.00     0.00
    12   2.8917      0.00    -0.07       0.00     0.01
    13   3.9727      0.00     0.02       0.00    -0.04
    14   4.0816      0.00    -0.08       0.00    -0.09
    15   5.0209      0.00     0.13       0.00     0.08
    16   5.0618      0.00     0.11       0.00    -0.08
    17   5.0618      0.00    -0.15       0.00     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.

13VU71    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj       103.311   103.309   103.313
ecceobj         0.668     0.668     0.668
incobj         13.876    13.876    13.876
qmin           33.358    33.337    33.424
qmax          174.107   178.545   179.264
amean          99.730   101.993   102.913
amin           97.103    98.540    98.769
amax          104.263   106.533   107.017
emean           0.653     0.660     0.661
emin            0.635     0.643     0.645
emax            0.670     0.677     0.676
imean          13.446    13.713    14.171
imin           12.386    12.534    12.544
imax           15.112    14.842    16.026
excite_mean     0.693     0.702     0.705
fracstop        1.000     1.000     1.000
cjmean          2.983     2.980     2.982

libcent 0      -180.0    -180.0    -180.0
libamp  0      -180.0    -180.0    -180.0
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       176.8     163.0     140.9
kozaiamp        179.9     180.0     180.0