Orbit Fit and Astrometric record for VNH0021

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: VNH0021   
# Created Sat Oct 21 01:38:45 2017
# Orbit generated from Bernstein formalism
# Fitting   42 observations of   42
# Arc:   1.38y
# First observation: 2012/04/18
#  Last observation: 2013/09/06
Preliminary a, adot, b, bdot, g, gdot:
   0.000000   0.026399   0.000001   0.001009   0.025384   0.000000
# Chi-squared of fit:     7.97 DOF:   78 RMS:  0.08
# Min/Max residuals:    -0.17    0.19
# Exact a, adot, b, bdot, g, gdot:
  1.624981E-05  2.605782E-02  6.036100E-07  9.953267E-04  2.510244E-02  4.070696E-04
# Covariance matrix:
  8.8434E-14  4.6322E-13 -5.6772E-16  2.1831E-14  5.2449E-13  1.7348E-11
  4.6322E-13  1.5569E-10 -1.6763E-13  6.1377E-12  1.5351E-10  4.9301E-09
 -5.6772E-16 -1.6763E-13  8.6177E-14 -7.6431E-14 -1.6540E-13 -5.3067E-12
  2.1831E-14  6.1377E-12 -7.6431E-14  3.3768E-13  6.0536E-12  1.9508E-10
  5.2449E-13  1.5351E-10 -1.6540E-13  6.0536E-12  1.5145E-10  4.8630E-09
  1.7348E-11  4.9301E-09 -5.3067E-12  1.9508E-10  4.8630E-09  1.5656E-07
#      lat0       lon0       xBary       yBary       zBary        JD0
    2.054827  -81.154637    0.948984    0.012138   -0.338167  2456035.768316
# Heliocentric elements and errors
Epoch:              2456030.5000  =  2012/04/13
Mean Anomaly:          354.89719 +/-     8.122
Argument of Peri:       48.44025 +/-     9.888
Long of Asc Node:      235.28571 +/-     0.011
Inclination:             3.03044 +/-     0.001
Eccentricity:         0.09582686 +/-    0.0016
Semi-Major Axis:     44.42094521 +/-    0.0260
Time of Perihelion: 2457563.3068 +/-    2439.6
Perihelion:          40.16422567 +/-    0.0735
Aphelion:            48.67766476 +/-    0.0753
Period (y)              296.0669 +/-      0.26
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X            5.23939923 +/-    0.0030
Ecliptic Y          -39.81606823 +/-    0.0193
Ecliptic Z            1.42840904 +/-    0.0007
Ecliptic XDOT         0.00280951 +/-    0.0000
Ecliptic YDOT         0.00040069 +/-    0.0000
Ecliptic ZDOT         0.00011018 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   40.18471035 +/-    0.0191
Geocenter to KBO     39.83675907 +/-    0.0195
# Hcoef: 12.80

The following table shows the complete astrometric record for VNH0021. 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 (VNH0021) followed by the observatory code and reference code for the source of the astrometry.

2012 04  18.26755  18 37 55.236  -21 05 37.84        VNH0021   304              
2012 04  18.31485  18 37 55.182  -21 05 37.76        VNH0021   304              
2012 04  18.36265  18 37 55.132  -21 05 37.63        VNH0021   304              
2012 04  18.40587  18 37 55.089  -21 05 37.61  28.6R VNH0021   304              
2012 04  19.30535  18 37 54.143  -21 05 35.19        VNH0021   304              
2012 04  19.30697  18 37 54.146  -21 05 35.19  29.1R VNH0021   304              
2012 04  19.31726  18 37 54.132  -21 05 35.11  27.9R VNH0021   304              
2012 04  19.33912  18 37 54.110  -21 05 35.11  28.5R VNH0021   304              
2012 04  19.35214  18 37 54.089  -21 05 35.07        VNH0021   304              
2012 04  19.36184  18 37 54.075  -21 05 35.07  27.8R VNH0021   304              
2012 04  19.36529  18 37 54.067  -21 05 35.07  27.4R VNH0021   304              
2012 04  19.39518  18 37 54.040  -21 05 34.89  28.5R VNH0021   304              
2012 04  19.39905  18 37 54.032  -21 05 34.79        VNH0021   304              
2012 04  19.40424  18 37 54.026  -21 05 34.81  28.7R VNH0021   304              
2012 04  19.41581  18 37 54.010  -21 05 34.75  29.3R VNH0021   304              
2012 04  20.25767  18 37 53.048  -21 05 32.70        VNH0021   304              
2012 04  20.26766  18 37 53.029  -21 05 32.77        VNH0021   304              
2013 06  08.17984  18 41 40.385  -20 56 08.34  28.6R VNH0021   304              
2013 06  08.22941  18 41 40.141  -20 56 08.51  28.5R VNH0021   304              
2013 06  08.26998  18 41 39.949  -20 56 08.59  29.2R VNH0021   304              
2013 06  11.21626  18 41 25.626  -20 56 17.74  28.7R VNH0021   304              
2013 06  11.27934  18 41 25.303  -20 56 18.14  28.9R VNH0021   304              
2013 06  11.34902  18 41 24.971  -20 56 18.22  28.1R VNH0021   304              
2013 06  13.21699  18 41 15.710  -20 56 24.49  28.6R VNH0021   304              
2013 06  13.27759  18 41 15.407  -20 56 24.64        VNH0021   304              
2013 07  02.19824  18 39 37.188  -20 57 40.85  28.1R VNH0021   304              
2013 07  02.24782  18 39 36.920  -20 57 41.16  28.8R VNH0021   304              
2013 07  02.29671  18 39 36.650  -20 57 41.32  28.0R VNH0021   304              
2013 07  03.19269  18 39 31.928  -20 57 45.42  26.7R VNH0021   304              
2013 07  03.26931  18 39 31.522  -20 57 45.88  27.9R VNH0021   304              
2013 07  03.31284  18 39 31.295  -20 57 46.15  27.4R VNH0021   304              
2013 07  05.36127  18 39 20.504  -20 57 56.04  28.2R VNH0021   568              
2013 07  05.44642  18 39 20.039  -20 57 56.29        VNH0021   568              
2013 07  05.52710  18 39 19.621  -20 57 56.74        VNH0021   568              
2013 07  06.44424  18 39 14.790  -20 58 01.17  28.8R VNH0021   568              
2013 07  06.52829  18 39 14.331  -20 58 01.55  28.8R VNH0021   568              
2013 08  28.07314  18 35 35.256  -21 02 18.14  29.7R VNH0021   304              
2013 08  30.06948  18 35 30.716  -21 02 26.56  29.9R VNH0021   304              
2013 09  01.05405  18 35 26.571  -21 02 34.63        VNH0021   304              
2013 09  03.04605  18 35 22.789  -21 02 42.62        VNH0021   304              
2013 09  04.05023  18 35 21.027  -21 02 46.47        VNH0021   304              
2013 09  06.04469  18 35 17.829  -21 02 54.05  29.6R VNH0021   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     0.03       0.00     0.00
  2   0.0001     -0.75    -0.02       0.13    -0.02
  3   0.0003     -1.44     0.01       0.30    -0.02
  4   0.0004     -2.04     0.06       0.36    -0.11
  5   0.0028    -15.09    -0.01       3.65    -0.04
  6   0.0028    -15.05     0.06       3.64    -0.05
  7   0.0029    -15.24     0.03       3.74     0.01
  8   0.0029    -15.55     0.09       3.76    -0.05
  9   0.0030    -15.84     0.01       3.82    -0.03
 10   0.0030    -16.03    -0.03       3.83    -0.05
 11   0.0030    -16.14    -0.08       3.84    -0.06
 12   0.0031    -16.51     0.05       4.04     0.04
 13   0.0031    -16.61     0.01       4.15     0.13
 14   0.0031    -16.70     0.01       4.13     0.10
 15   0.0031    -16.92    -0.02       4.21     0.13
 16   0.0054    -30.22    -0.04       7.14     0.06
 17   0.0055    -30.49    -0.14       7.08    -0.03
 18   1.1387   3184.46     0.00     352.26    -0.02
 19   1.1388   3181.04    -0.02     352.34    -0.03
 20   1.1390   3178.35     0.07     352.45     0.00
 21   1.1470   2977.50     0.00     357.61     0.06
 22   1.1472   2972.96    -0.11     357.53    -0.13
 23   1.1474   2968.31     0.13     357.78    -0.01
 24   1.1525   2838.43    -0.06     360.73    -0.04
 25   1.1527   2834.18     0.01     360.88     0.01
 26   1.2045   1456.17    -0.00     380.45     0.19
 27   1.2046   1452.41    -0.03     380.40     0.10
 28   1.2047   1448.62    -0.14     380.50     0.16
 29   1.2072   1382.35    -0.08     380.91     0.19
 30   1.2074   1376.65    -0.02     380.84     0.07
 31   1.2075   1373.46     0.06     380.79    -0.01
 32   1.2131   1221.98     0.09     381.18    -0.16
 33   1.2134   1215.46    -0.02     381.38    -0.00
 34   1.2136   1209.59     0.18     381.32    -0.10
 35   1.2161   1141.78     0.04     381.49    -0.17
 36   1.2163   1135.34    -0.10     381.54    -0.16
 37   1.3602  -1942.72     0.08     324.18    -0.04
 38   1.3656  -2006.68     0.04     319.71    -0.05
 39   1.3711  -2065.10    -0.01     315.23     0.03
 40   1.3765  -2118.45    -0.04     310.52    -0.01
 41   1.3793  -2143.31    -0.06     308.20     0.05
 42   1.3847  -2188.46    -0.01     303.38     0.06

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.

VNH0021    quality flag:2

Type:        9:5EEEE CLASSICAL   9:5EEEE

axisobj        44.337    44.438    44.328
ecceobj         0.095     0.108     0.095
incobj          3.034     3.035     3.034
qmin           39.713    38.955    39.681
qmax           49.773    50.575    49.793
amean          44.554    44.663    44.554
amin           44.179    44.289    44.186
amax           44.973    45.071    44.966
emean           0.093     0.107     0.095
emin            0.080     0.091     0.083
emax            0.107     0.123     0.107
imean           4.620     4.774     4.621
imin            3.993     4.144     3.980
imax            5.209     5.432     5.215
excite_mean     0.123     0.136     0.125
fracstop        1.000     1.000     1.000
cjmean          3.090     3.087     3.089

libcent 0       173.5    -180.0     187.7
libamp  0       169.9    -180.0     148.8
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       175.2     178.0     180.1
kozaiamp        180.0     180.0     180.0