Orbit Fit and Astrometric record for 05VA123

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: 05VA123   
# Created Thu Dec  9 02:10:21 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     21 observations of     21
# Arc:  15.03y
# First observation: 2005/11/02
#  Last observation: 2020/11/14
# Chi-squared of fit:    30.18 DOF:     36 RMS:  0.21
# Min/Max residuals:    -0.60    0.61
# Exact a, adot, b, bdot, g, gdot:
  1.772007E-05  3.462706E-02  1.065048E-06  8.325667E-04  3.054831E-02  7.712265E-03
# Covariance matrix:
  3.0285E-13 -7.6936E-14  1.7021E-15 -1.5215E-15  2.5662E-13 -1.2116E-13
 -7.6936E-14  5.4979E-14 -1.1821E-15  1.2564E-15 -3.8264E-14  1.0308E-13
  1.7021E-15 -1.1821E-15  1.1612E-13 -1.0330E-14  1.2584E-15 -2.3175E-15
 -1.5215E-15  1.2564E-15 -1.0330E-14  2.8829E-15 -7.4920E-16  2.4933E-15
  2.5662E-13 -3.8264E-14  1.2584E-15 -7.4920E-16  4.5284E-13 -5.3990E-14
 -1.2116E-13  1.0308E-13 -2.3175E-15  2.4933E-15 -5.3990E-14  2.0493E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.630565   64.354824    0.413648    0.010090   -0.906553  2453676.807023
# Heliocentric elements and errors
Epoch:              2453676.5000  =  2005/11/02
Mean Anomaly:           42.62915 +/-     0.011
Argument of Peri:      316.98543 +/-     0.015
Long of Asc Node:       39.81428 +/-     0.002
Inclination:             1.51785 +/-     0.000
Eccentricity:         0.24914975 +/-    0.0001
Semi-Major Axis:     39.37842046 +/-    0.0046
Time of Perihelion: 2442988.6576 +/-       3.3
Perihelion:          29.56729675 +/-    0.0040
Aphelion:            49.18954416 +/-    0.0061
Period (y)              247.1130 +/-      0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           14.92748813 +/-    0.0003
Ecliptic Y           30.14527561 +/-    0.0006
Ecliptic Z            0.36029490 +/-    0.0000
Ecliptic XDOT        -0.00249667 +/-    0.0000
Ecliptic YDOT         0.00195903 +/-    0.0000
Ecliptic ZDOT         0.00008223 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   33.64058768 +/-    0.0006
Geocenter to KBO     32.73494358 +/-    0.0007
# Hcoef:  7.14

The following table shows the complete astrometric record for 05VA123. 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 (05VA123) followed by the observatory code and reference code for the source of the astrometry.

2005 11  02.30628  04 09 00.78   +21 38 00.6   21.6R 05VA123   695  Cq2844      
2005 11  02.36397  04 09 00.44   +21 37 59.9         05VA123   695  Cq2844      
2005 11  02.42006  04 09 00.12   +21 37 59.1         05VA123   695  Cq2844      
2005 12  02.22902  04 05 55.61   +21 30 07.0   21.4R 05VA123   695  Cq2844      
2005 12  02.28236  04 05 55.27   +21 30 06.1         05VA123   695  Cq2844      
2005 12  02.33562  04 05 54.93   +21 30 05.2         05VA123   695  Cq2844      
2005 12  30.25003  04 03 14.32   +21 22 47.1   21.9R 05VA123   688  Cq2844      
2005 12  30.31007  04 03 14.02   +21 22 47.1         05VA123   688  Cq2844      
2006 02  25.11724  04 01 32.23   +21 17 30.8   22.2R 05VA123   688  Cq6138      
2006 02  25.23876  04 01 32.40   +21 17 31.3         05VA123   688  Cq6138      
2008 10  27.47806  04 34 08.17   +22 44 47.2         05VA123   695  C~01Mr      
2008 10  27.51305  04 34 08.00   +22 44 47.1         05VA123   695  C~01Mr      
2008 10  29.47624  04 33 58.20   +22 44 29.2         05VA123   695  C~01Mr      
2008 10  29.50017  04 33 58.06   +22 44 29.0         05VA123   695  C~01Mr      
2008 11  30.30058  04 30 50.23   +22 38 25.9   22.5R 05VA123   688  C~02Mb      
2008 11  30.37919  04 30 49.70   +22 38 25.4         05VA123   688  C~02Mb      
2010 12  02.38095  04 46 46.77   +23 14 13.3   23.0R 05VA123   688  C~0Pjb      
2010 12  02.44628  04 46 46.36   +23 14 12.5         05VA123   688  C~0Pjb      
2020 11  14.429950 06 03 20.885  +24 37 24.05  22.7G 05VA123   G37  C~4NJL      
2020 11  14.477410 06 03 20.661  +24 37 23.93        05VA123   G37  C~4NJL      
2020 11  14.506510 06 03 20.535  +24 37 23.67        05VA123   G37  C~4NJL      

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     0.07       0.00    -0.12
     2   0.0002      0.00    -0.01       0.00    -0.02
     3   0.0003      0.00     0.07       0.00    -0.03
     4   0.0819      0.00     0.15       0.00    -0.15
     5   0.0821      0.00     0.19       0.00    -0.16
     6   0.0822      0.00     0.21       0.00    -0.16
     7   0.1586      0.00    -0.12       0.00    -0.60
     8   0.1588      0.00    -0.14       0.00     0.24
     9   0.3143      0.00     0.26       0.00    -0.14
    10   0.3147      0.00    -0.23       0.00    -0.10
    11   2.9847      0.00    -0.07       0.00     0.22
    12   2.9848      0.00    -0.00       0.00     0.44
    13   2.9902      0.00    -0.09       0.00     0.07
    14   2.9903      0.00    -0.34       0.00     0.09
    15   3.0773      0.00     0.17       0.00     0.08
    16   3.0775      0.00    -0.18       0.00     0.61
    17   5.0817      0.00     0.03       0.00     0.09
    18   5.0818      0.00     0.15       0.00    -0.01
    19  15.0339      0.00     0.02       0.00     0.12
    20  15.0340      0.00    -0.06       0.00    -0.09
    21  15.0341      0.00     0.06       0.00    -0.39

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.

05VA123    quality flag:3

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

axisobj        39.924    39.924    39.924
ecceobj         0.258     0.258     0.258
incobj          1.512     1.512     1.512
qmin           29.007    29.007    29.000
qmax           50.492    50.470    50.470
amean          39.456    39.455    39.455
amin           39.050    39.011    39.024
amax           39.973    39.973    39.973
emean           0.249     0.249     0.249
emin            0.234     0.235     0.235
emax            0.263     0.263     0.263
imean           1.108     1.091     1.126
imin            0.645     0.631     0.661
imax            1.782     1.782     1.782
excite_mean     0.249     0.249     0.249
fracstop        1.000     1.000     1.000
cjmean          2.980     2.980     2.980

libcent 0       180.0     179.8     179.9
libamp  0        70.7      71.7      70.6
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       170.3     170.2     170.5
kozaiamp        180.0     180.0     180.0