Orbit Fit and Astrometric record for VNH0002

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: VNH0002   
# Created Fri Oct 20 01:38:49 2017
# Orbit generated from Bernstein formalism
# Fitting   54 observations of   55
# Arc:   2.36y
# First observation: 2011/04/28
#  Last observation: 2013/09/06
Preliminary a, adot, b, bdot, g, gdot:
   0.000118   0.022989  -0.000003  -0.002353   0.023397   0.000000
# Chi-squared of fit:    20.75 DOF:  102 RMS:  0.11
# Min/Max residuals:    -0.30    0.40
# Exact a, adot, b, bdot, g, gdot:
  1.568692E-05  2.250125E-02 -1.291140E-06 -2.303545E-03  2.285095E-02 -5.740643E-03
# Covariance matrix:
  2.2808E-13  3.0057E-13 -1.4452E-15 -4.3283E-14  3.8058E-13  8.6700E-12
  3.0057E-13  9.4894E-13 -9.3145E-16 -1.2333E-13  9.0002E-13  2.4699E-11
 -1.4452E-15 -9.3145E-16  7.9575E-14 -3.7269E-14 -3.1772E-15 -8.3385E-15
 -4.3283E-14 -1.2333E-13 -3.7269E-14  4.2756E-14 -1.1644E-13 -3.3291E-12
  3.8058E-13  9.0002E-13 -3.1772E-15 -1.1644E-13  9.8268E-13  2.3322E-11
  8.6700E-12  2.4699E-11 -8.3385E-15 -3.3291E-12  2.3322E-11  6.6667E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    2.721319  -82.448390    0.876433    0.023800   -0.501227  2455679.768856
# Heliocentric elements and errors
Epoch:              2455670.5000  =  2011/04/19
Mean Anomaly:          317.90799 +/-     0.056
Argument of Peri:      229.13201 +/-     0.067
Long of Asc Node:      121.12013 +/-     0.001
Inclination:             6.41540 +/-     0.000
Eccentricity:         0.31324894 +/-    0.0012
Semi-Major Axis:     53.33608145 +/-    0.0464
Time of Perihelion: 2472305.6693 +/-       3.8
Perihelion:          36.62861042 +/-    0.0719
Aphelion:            70.04355248 +/-    0.0888
Period (y)              389.5291 +/-      0.51
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X            4.94647321 +/-    0.0002
Ecliptic Y          -43.94591269 +/-    0.0019
Ecliptic Z            2.07768433 +/-    0.0001
Ecliptic XDOT         0.00258211 +/-    0.0000
Ecliptic YDOT         0.00102832 +/-    0.0000
Ecliptic ZDOT        -0.00030831 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   44.27219909 +/-    0.0019
Geocenter to KBO     43.76185383 +/-    0.0019
# Hcoef: 11.28

The following table shows the complete astrometric record for VNH0002. 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 (VNH0002) followed by the observatory code and reference code for the source of the astrometry.

2011 04  28.26809  18 32 13.602  -20 30 25.28        VNH0002   304              
2011 04  28.36806  18 32 13.403  -20 30 25.20        VNH0002   304              
2011 04  30.27064  18 32 09.654  -20 30 24.26        VNH0002   304              
2011 04  30.39635  18 32 09.389  -20 30 24.31        VNH0002   304              
2011 05  06.36890  18 31 55.573  -20 30 23.93  27.6R VNH0002   304              
2011 05  31.43696  18 30 29.873  -20 30 59.53  25.3R VNH0002   304              
2011 05  31.48809  18 30 29.686  -20 30 59.82  26.9R VNH0002   568              
2011 05  31.56672  18 30 29.359  -20 30 59.97  26.5R VNH0002   568              
2011 06  01.59657  18 30 25.041  -20 31 02.71  26.3R VNH0002   568              
2011 06  04.14568  18 30 14.185  -20 31 09.57  25.0R VNH0002   304              
2011 06  04.29531  18 30 13.527  -20 31 10.21  25.9R VNH0002   304              
2011 06  04.39267  18 30 13.111  -20 31 10.43  25.0R VNH0002   304              
2011 07  01.35671  18 28 07.086  -20 32 55.75        VNH0002   304              
2011 07  02.03942  18 28 03.816  -20 32 58.79        VNH0002   304              
2011 07  02.14714  18 28 03.288  -20 32 59.46        VNH0002   304              
2011 07  02.14772  18 28 03.286  -20 32 59.46  27.8R VNH0002   304              
2011 07  02.25740  18 28 02.741  -20 33 00.04        VNH0002   304              
2011 07  02.25798  18 28 02.747  -20 32 59.95  28.0R VNH0002   304              
2011 07  02.28855  18 28 02.609  -20 33 00.43  27.0R VNH0002   568              
2011 07  02.53920  18 28 01.377  -20 33 01.76  26.7R VNH0002   568              
2013 06  03.21749  18 41 32.613  -20 37 35.31  27.6R VNH0002   304              
2013 06  03.27689  18 41 32.358  -20 37 35.54  27.8R VNH0002   304              
2013 06  04.21141  18 41 28.397  -20 37 39.38  27.1R VNH0002   304              
2013 06  04.28988  18 41 28.053  -20 37 39.67  27.4R VNH0002   304              
2013 06  04.36360  18 41 27.740  -20 37 39.94  27.4R VNH0002   304              
2013 06  08.17984  18 41 11.146  -20 37 56.35  27.6R VNH0002   304              
2013 06  08.22941  18 41 10.918  -20 37 56.57  28.0R VNH0002   304              
2013 06  08.26998  18 41 10.735  -20 37 56.76  27.8R VNH0002   304              
2013 06  11.21626  18 40 57.520  -20 38 10.30  27.7R VNH0002   304              
2013 06  11.27934  18 40 57.224  -20 38 10.50  27.4R VNH0002   304              
2013 06  13.21699  18 40 48.373  -20 38 19.75  28.0R VNH0002   304              
2013 06  13.27759  18 40 48.082  -20 38 20.07  27.9R VNH0002   304              
2013 06  13.35667  18 40 47.716  -20 38 20.58  28.1R VNH0002   304              
2013 06  13.37737  18 40 47.623  -20 38 20.62  27.4R VNH0002   304              
2013 07  02.16685  18 39 17.632  -20 40 04.51  27.4R VNH0002   304              
2013 07  03.16722  18 39 12.749  -20 40 10.61  24.7R VNH0002   304              
2013 07  03.21583  18 39 12.510  -20 40 10.89  24.4R VNH0002   304              
2013 07  03.29284  18 39 12.132  -20 40 11.35  24.1R VNH0002   304              
2013 07  04.19618  18 39 07.741  -20 40 16.95  27.3R VNH0002   304              
2013 07  04.22278  18 39 07.606  -20 40 17.07  27.3R VNH0002   304              
2013 07  04.26659  18 39 07.375  -20 40 17.32  28.3R VNH0002   304              
2013 07  04.28468  18 39 07.298  -20 40 17.53  27.3R VNH0002   304              
2013 07  04.32106  18 39 07.163  -20 40 18.11  27.2R VNH0002   568              
2013 07  04.49430  18 39 06.315  -20 40 19.21  30.0R VNH0002   568              
2013 07  05.40444  18 39 01.897  -20 40 24.95  27.9R VNH0002   568              
2013 07  05.48837  18 39 01.469  -20 40 25.40  28.5R VNH0002   568              
2013 07  06.31422  18 38 57.433  -20 40 30.52  27.1R VNH0002   568              
2013 07  06.40236  18 38 57.006  -20 40 31.07  27.8R VNH0002   568              
2013 07  06.48552  18 38 56.600  -20 40 31.57  27.9R VNH0002   568              
2013 08  28.07314  18 35 33.690  -20 46 17.81  28.5R VNH0002   304              
2013 08  30.06767  18 35 29.456  -20 46 30.04  28.7R VNH0002   304              
2013 09  01.05156  18 35 25.577  -20 46 41.93  28.0R VNH0002   304              
2013 09  03.04605  18 35 22.027  -20 46 53.70  29.0R VNH0002   304              
2013 09  04.04833  18 35 20.374  -20 46 59.60  29.2R VNH0002   304              
2013 09  06.04337  18 35 17.354  -20 47 11.04  29.2R VNH0002   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    -0.02       0.00    -0.06
  2   0.0003     -2.79    -0.06       0.24    -0.02
  3   0.0055    -55.32    -0.05       4.11     0.02
  4   0.0058    -59.04    -0.01       4.27    -0.07
  5   0.0222   -252.83     0.01      15.43    -0.06
  6   0.0908  -1457.01    -0.08      45.21     0.02
  7   0.0910  -1459.65     0.10      45.06     0.04
  8   0.0912  -1464.25     0.19      45.16     0.09
  9   0.0940  -1524.97     0.06      45.64     0.06
 10   0.1010  -1677.64    -0.08      46.86     0.14
 11   0.1014  -1686.91    -0.10      46.71    -0.05
 12   0.1016  -1692.75     0.06      46.80    -0.02
 13   0.1755  -3466.38     0.02      32.15    -0.06
 14   0.1773  -3512.41     0.06      31.39     0.17
 15   0.1776  -3519.86     0.03      31.09     0.05
 16   0.1776  -3519.88     0.04      31.09     0.05
 17   0.1779  -3527.56    -0.07      30.89    -0.00
 18   0.1779  -3527.47     0.06      30.97     0.09
 19   0.1780  -3529.43    -0.04      30.59    -0.10
 20   0.1787  -3546.79    -0.11      30.12    -0.21
 21   2.0998   7811.81     0.06    -923.69     0.04
 22   2.1000   7808.22     0.06    -923.67     0.05
 23   2.1025   7752.40     0.02    -923.60    -0.01
 24   2.1027   7747.56    -0.02    -923.55     0.03
 25   2.1029   7743.15     0.08    -923.52     0.05
 26   2.1134   7509.30     0.05    -923.62    -0.02
 27   2.1135   7506.09    -0.01    -923.62    -0.01
 28   2.1136   7503.51    -0.01    -923.63    -0.02
 29   2.1217   7317.27     0.03    -924.26    -0.06
 30   2.1219   7313.10    -0.03    -924.17     0.05
 31   2.1272   7188.36     0.05    -924.81     0.07
 32   2.1273   7184.26    -0.05    -924.85     0.06
 33   2.1276   7179.09    -0.01    -925.00    -0.09
 34   2.1276   7177.79     0.05    -924.95    -0.03
 35   2.1791   5909.25    -0.01    -942.91    -0.01
 36   2.1818   5840.41    -0.10    -944.43     0.02
 37   2.1819   5837.04    -0.08    -944.48     0.03
 38   2.1821   5831.71    -0.04    -944.59     0.03
 39   2.1846   5769.80    -0.01    -946.08     0.01
 40   2.1847   5767.90    -0.06    -946.07     0.06
 41   2.1848   5764.65    -0.26    -946.11     0.09
 42   2.1849   5763.55    -0.09    -946.24    -0.02
 43   2.1849   5761.62     0.27    -946.70    -0.24
 44   2.1854   5749.67     0.40    -947.01    -0.27
 45   2.1879   5687.37 (   0.42)   -948.62 (  -0.34)
 46   2.1881   5681.34     0.24    -948.67    -0.26
 47   2.1904   5624.44    -0.30    -950.03    -0.18
 48   2.1906   5618.42    -0.19    -950.18    -0.17
 49   2.1909   5612.70    -0.12    -950.30    -0.16
 50   2.3349   2748.49     0.03   -1114.92     0.19
 51   2.3403   2688.46     0.06   -1123.51     0.13
 52   2.3457   2633.43     0.01   -1132.07     0.16
 53   2.3512   2583.01     0.03   -1140.79     0.17
 54   2.3540   2559.51     0.00   -1145.28     0.11
 55   2.3594   2516.54    -0.03   -1154.13     0.13

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.

VNH0002    quality flag:2

Type:       SCATNEAR  SCATNEAR   7:3EEEE

axisobj        53.082    53.210    52.956
ecceobj         0.313     0.316     0.309
incobj          6.419     6.420     6.419
qmin           35.378    35.801    36.250
qmax           71.725    71.735    70.859
amean          52.983    53.367    52.969
amin           52.167    52.749    52.292
amax           53.952    54.105    53.834
emean           0.311     0.315     0.304
emin            0.290     0.302     0.293
emax            0.333     0.328     0.317
imean           5.316     5.133     4.938
imin            4.339     4.508     4.735
imax            6.596     5.800     5.206
excite_mean     0.324     0.327     0.316
fracstop        1.000     1.000     1.000
cjmean          3.079     3.081     3.086

libcent 0      -180.0    -180.0     178.6
libamp  0      -180.0    -180.0     131.0
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       181.3     183.7     194.4
kozaiamp        179.9     180.0     180.0