Orbit Fit and Astrometric record for VNH0022

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: VNH0022   
# Created Tue Oct 24 01:38:45 2017
# Orbit generated from Bernstein formalism
# Fitting   35 observations of   35
# Arc:   1.38y
# First observation: 2012/04/17
#  Last observation: 2013/09/04
Preliminary a, adot, b, bdot, g, gdot:
   0.000001   0.025316   0.000000   0.002233   0.024889   0.000000
# Chi-squared of fit:     8.23 DOF:   64 RMS:  0.09
# Min/Max residuals:    -0.28    0.21
# Exact a, adot, b, bdot, g, gdot:
  1.576358E-05  2.485445E-02  1.049886E-06  2.193778E-03  2.447800E-02 -3.912615E-03
# Covariance matrix:
  8.6126E-14  8.8450E-13 -1.6411E-15  8.8556E-14  9.6164E-13  3.1768E-11
  8.8450E-13  2.1440E-10 -3.6914E-13  1.9640E-11  2.1702E-10  7.0619E-09
 -1.6411E-15 -3.6914E-13  8.2122E-14 -9.9619E-14 -3.7384E-13 -1.2170E-11
  8.8556E-14  1.9640E-11 -9.9619E-14  1.9124E-12  1.9887E-11  6.4878E-10
  9.6164E-13  2.1702E-10 -3.7384E-13  1.9887E-11  2.1979E-10  7.1512E-09
  3.1768E-11  7.0619E-09 -1.2170E-11  6.4878E-10  7.1512E-09  2.3321E-07
#      lat0       lon0       xBary       yBary       zBary        JD0
    1.928841  -81.047376    0.954545    0.010824   -0.321325  2456034.841006
# Heliocentric elements and errors
Epoch:              2456030.5000  =  2012/04/13
Mean Anomaly:          311.36282 +/-     0.804
Argument of Peri:       90.26156 +/-     2.064
Long of Asc Node:      257.18681 +/-     0.008
Inclination:             5.46387 +/-     0.002
Eccentricity:         0.20838737 +/-    0.0196
Semi-Major Axis:     46.16126610 +/-    0.4095
Time of Perihelion: 2471507.2884 +/-     151.6
Perihelion:          36.54184138 +/-    0.9604
Aphelion:            55.78069083 +/-    1.0306
Period (y)              313.6352 +/-      4.17
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X            5.46434527 +/-    0.0038
Ecliptic Y          -40.79670987 +/-    0.0244
Ecliptic Z            1.37509261 +/-    0.0008
Ecliptic XDOT         0.00267178 +/-    0.0000
Ecliptic YDOT         0.00087650 +/-    0.0001
Ecliptic ZDOT         0.00023061 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.18399550 +/-    0.0242
Geocenter to KBO     40.85301915 +/-    0.0247
# Hcoef: 13.06

The following table shows the complete astrometric record for VNH0022. 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 (VNH0022) followed by the observatory code and reference code for the source of the astrometry.

2012 04  17.34024  18 38 24.901  -21 12 44.94  29.0R VNH0022   304              
2012 04  17.34199  18 38 24.898  -21 12 45.07        VNH0022   304              
2012 04  17.38720  18 38 24.856  -21 12 44.87        VNH0022   304              
2012 04  17.41592  18 38 24.813  -21 12 44.77        VNH0022   304              
2012 04  18.26755  18 38 24.040  -21 12 42.07        VNH0022   304              
2012 04  18.31485  18 38 23.977  -21 12 41.92        VNH0022   304              
2012 04  18.36265  18 38 23.931  -21 12 41.73        VNH0022   304              
2012 04  18.40528  18 38 23.880  -21 12 41.72        VNH0022   304              
2012 04  19.30535  18 38 22.944  -21 12 38.87        VNH0022   304              
2012 04  19.30697  18 38 22.951  -21 12 39.02  29.7R VNH0022   304              
2012 04  19.31726  18 38 22.939  -21 12 39.01  28.6R VNH0022   304              
2012 04  19.35214  18 38 22.902  -21 12 38.80        VNH0022   304              
2012 04  19.36184  18 38 22.891  -21 12 38.82  29.1R VNH0022   304              
2012 04  19.36529  18 38 22.877  -21 12 38.98  29.0R VNH0022   304              
2012 04  19.39518  18 38 22.851  -21 12 38.70  29.5R VNH0022   304              
2012 04  19.39905  18 38 22.845  -21 12 38.53  26.0R VNH0022   304              
2012 04  19.40424  18 38 22.837  -21 12 38.66  29.1R VNH0022   304              
2012 04  19.41581  18 38 22.824  -21 12 38.58  29.0R VNH0022   304              
2013 06  11.21626  18 41 39.733  -20 58 52.34  28.9R VNH0022   304              
2013 06  11.27934  18 41 39.432  -20 58 52.42  29.1R VNH0022   304              
2013 06  11.34902  18 41 39.100  -20 58 52.54  29.5R VNH0022   304              
2013 06  13.21699  18 41 29.980  -20 58 57.42  29.7R VNH0022   304              
2013 06  13.27759  18 41 29.680  -20 58 57.58  29.7R VNH0022   304              
2013 06  13.35667  18 41 29.288  -20 58 57.91  29.4R VNH0022   304              
2013 06  13.37737  18 41 29.192  -20 58 57.79  28.3R VNH0022   304              
2013 07  05.44642  18 39 36.036  -21 00 13.12  28.3R VNH0022   568              
2013 07  05.52857  18 39 35.597  -21 00 13.17  28.4R VNH0022   568              
2013 07  06.35581  18 39 31.326  -21 00 16.80  28.1R VNH0022   568              
2013 07  06.44410  18 39 30.862  -21 00 16.90        VNH0022   568              
2013 07  06.52777  18 39 30.423  -21 00 17.35  29.2R VNH0022   568              
2013 08  28.07314  18 35 53.916  -21 03 52.66        VNH0022   304              
2013 08  30.06767  18 35 49.403  -21 03 59.76        VNH0022   304              
2013 09  01.05405  18 35 45.263  -21 04 06.22        VNH0022   304              
2013 09  03.04605  18 35 41.489  -21 04 12.63        VNH0022   304              
2013 09  04.04975  18 35 39.728  -21 04 15.85        VNH0022   304              

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     0.06       0.00     0.08
  2   0.0000     -0.05     0.03      -0.13    -0.06
  3   0.0001     -0.62     0.07       0.11     0.00
  4   0.0002     -1.22    -0.14       0.25     0.02
  5   0.0025    -11.82     0.11       3.66     0.01
  6   0.0027    -12.69    -0.07       3.87     0.04
  7   0.0028    -13.32     0.01       4.10     0.08
  8   0.0029    -14.03    -0.07       4.16    -0.03
  9   0.0054    -26.90    -0.12       7.87     0.09
 10   0.0054    -26.82    -0.01       7.72    -0.08
 11   0.0054    -26.98    -0.01       7.74    -0.10
 12   0.0055    -27.48     0.05       7.98     0.01
 13   0.0055    -27.64     0.06       7.97    -0.04
 14   0.0055    -27.85    -0.09       7.83    -0.20
 15   0.0056    -28.19     0.05       8.13    -0.01
 16   0.0056    -28.26     0.04       8.30     0.15
 17   0.0057    -28.38     0.00       8.18     0.00
 18   0.0057    -28.56     0.02       8.27     0.05
 19   1.1496   2777.69    -0.17     642.66    -0.05
 20   1.1497   2773.47    -0.02     642.88     0.02
 21   1.1499   2768.83     0.14     643.10     0.06
 22   1.1550   2641.05    -0.05     647.34     0.09
 23   1.1552   2636.85    -0.00     647.48     0.09
 24   1.1554   2631.35     0.03     647.54    -0.04
 25   1.1555   2630.02     0.14     647.76     0.12
 26   1.2159   1043.80    -0.03     683.10    -0.20
 27   1.2161   1037.67    -0.09     683.47     0.07
 28   1.2184    977.75    -0.02     683.92    -0.28
 29   1.2186    971.26     0.02     684.27    -0.02
 30   1.2189    965.10     0.04     684.24    -0.16
 31   1.3627  -2073.78    -0.02     667.28     0.21
 32   1.3682  -2137.27     0.01     664.14    -0.06
 33   1.3736  -2195.52    -0.03     661.30     0.09
 34   1.3791  -2248.65     0.03     658.19     0.07
 35   1.3818  -2273.45     0.03     656.51    -0.02

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.

VNH0022    quality flag:1

Type:       SCATNEAR      2:1E CLASSICAL

axisobj        46.099    47.356    45.216
ecceobj         0.209     0.264     0.158
incobj          5.468     5.473     5.462
qmin           35.571    34.089    37.367
qmax           57.510    62.398    53.894
amean          46.324    47.796    45.429
amin           45.888    47.140    45.042
amax           46.877    48.564    45.865
emean           0.210     0.268     0.158
emin            0.194     0.251     0.143
emax            0.229     0.289     0.176
imean           7.706     6.751     7.412
imin            6.816     6.472     6.669
imax            8.709     7.057     8.261
excite_mean     0.250     0.292     0.204
fracstop        1.000     1.000     1.000
cjmean          3.053     3.041     3.067

libcent 0      -180.0     180.0    -180.0
libamp  0      -180.0     152.0    -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       178.8     189.1     182.9
kozaiamp        180.0     179.8     180.0