Orbit Fit and Astrometric record for 98WV24

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: 98WV24    
# Created Tue Dec 12 02:37:00 2017
# Orbit generated from Bernstein formalism
# Fitting   23 observations of   23
# Arc:  10.10y
# First observation: 1998/11/18
#  Last observation: 2008/12/22
Preliminary a, adot, b, bdot, g, gdot:
  -0.000086   0.027617   0.000008  -0.000562   0.025825   0.000000
# Chi-squared of fit:    62.53 DOF:   40 RMS:  0.29
# Min/Max residuals:    -0.50    0.63
# Exact a, adot, b, bdot, g, gdot:
  1.481254E-05  2.754546E-02  9.419290E-07 -5.602879E-04  2.684190E-02  7.664222E-04
# Covariance matrix:
  1.8922E-13 -8.5489E-14 -1.0102E-15  1.2752E-15 -1.4864E-14 -2.4877E-13
 -8.5489E-14  9.3187E-14  1.4018E-15 -1.6285E-15 -1.1022E-14  3.2206E-13
 -1.0102E-15  1.4018E-15  1.3459E-13 -1.8092E-14 -5.7262E-16  5.0358E-15
  1.2752E-15 -1.6285E-15 -1.8092E-14  4.6500E-15 -4.5927E-17 -5.9604E-15
 -1.4864E-14 -1.1022E-14 -5.7262E-16 -4.5927E-17  1.6415E-13 -1.4881E-14
 -2.4877E-13  3.2206E-13  5.0358E-15 -5.9604E-15 -1.4881E-14  1.1750E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.004733   43.532532   -0.212648   -0.017098   -0.961091  2451135.625531
# Heliocentric elements and errors
Epoch:              2451130.5000  =  1998/11/13
Mean Anomaly:           51.43570 +/-     0.046
Argument of Peri:      164.74183 +/-     0.050
Long of Asc Node:      183.59375 +/-     0.004
Inclination:             1.51535 +/-     0.000
Eccentricity:         0.04380176 +/-    0.0001
Semi-Major Axis:     39.24561414 +/-    0.0027
Time of Perihelion: 2438299.8897 +/-      11.3
Perihelion:          37.52658711 +/-    0.0034
Aphelion:            40.96464116 +/-    0.0035
Period (y)              245.8640 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           27.56366675 +/-    0.0004
Ecliptic Y           26.47211599 +/-    0.0004
Ecliptic Z           -0.65321255 +/-    0.0000
Ecliptic XDOT        -0.00187982 +/-    0.0000
Ecliptic YDOT         0.00209917 +/-    0.0000
Ecliptic ZDOT        -0.00005854 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   38.22244545 +/-    0.0004
Geocenter to KBO     37.25518864 +/-    0.0006
# Hcoef:  7.14

The following table shows the complete astrometric record for 98WV24. 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 (98WV24) followed by the observatory code and reference code for the source of the astrometry.

1998 11  18.12480  02 45 33.31   +14 56 32.1   22.6R 98WV24    695  Ca3208      
1998 11  18.19378  02 45 32.96   +14 56 30.3         98WV24    695  Ca3208      
1998 11  26.36618  02 44 51.70   +14 53 25.0   23.0R 98WV24    695  Ca3208      
1998 11  27.35610  02 44 46.88   +14 53 03.1         98WV24    695  Ca3208      
1999 01  22.26272  02 42 07.48   +14 41 48.1   22.8R 98WV24    568  Ca5544      
1999 01  23.30133  02 42 07.30   +14 41 48.6         98WV24    568  Ca5544      
1999 09  08.55038  02 56 57.71   +15 46 05.0         98WV24    568  Ca7322      
1999 09  08.60471  02 56 57.59   +15 46 04.4         98WV24    568  Ca7322      
1999 10  10.50620  02 55 09.89   +15 37 31.7   23.3R 98WV24    568  Ca7322      
1999 10  10.57244  02 55 09.58   +15 37 30.4   23.4R 98WV24    568  Ca7322      
2000 11  23.19461  02 57 41.53   +15 46 06.5   21.8R 98WV24    695  Cc2190      
2000 11  23.39344  02 57 40.49   +15 46 02.5         98WV24    695  Cc2190      
2002 12  04.20899  03 09 27.50   +16 31 19.1   22.2R 98WV24    662  C~0771      
2002 12  04.31440  03 09 26.96   +16 31 17.0         98WV24    662  C~0771      
2004 09  21.335935 03 27 50.22   +17 39 03.2         98WV24    645  C~1cF1      
2004 09  21.336765 03 27 50.21   +17 39 03.2         98WV24    645  C~1cF1      
2004 09  21.339252 03 27 50.21   +17 39 03.2         98WV24    645  C~1cF1      
2007 08  27.11490  03 47 08.94   +18 40 58.3   24.2R 98WV24    250  S~06AK      
2007 08  27.12184  03 47 08.94   +18 40 58.3         98WV24    250  S~06AK      
2007 08  27.12809  03 47 08.95   +18 40 58.3         98WV24    250  S~06AK      
2007 08  27.13434  03 47 08.95   +18 40 58.3         98WV24    250  S~06AK      
2008 12  22.26460  03 46 02.69   +18 34 02.5   22.0r 98WV24    695  C~0hkJ      
2008 12  22.35218  03 46 02.29   +18 34 01.2   21.7r 98WV24    695  C~0hkJ      

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     0.29       0.00    -0.26
  2   0.0002     -5.38     0.38      -0.20    -0.50
  3   0.0226   -631.47    -0.18       1.69    -0.08
  4   0.0253   -704.70    -0.17       1.70    -0.37
  5   0.1783  -3112.69    -0.23      53.15     0.05
  6   0.1812  -3115.02    -0.21      54.41    -0.04
  7   0.8061  10344.66     0.43     -49.90     0.02
  8   0.8062  10342.83     0.37     -49.98     0.01
  9   0.8936   8702.36    -0.29     -94.97     0.20
 10   0.8938   8697.69    -0.34     -94.93     0.29
 11   2.0152  10952.95     0.06    -229.28     0.16
 12   2.0158  10937.38     0.12    -228.84     0.51
 13   4.0440  21545.36    -0.13    -455.70     0.63
 14   4.0443  21537.23    -0.34    -455.61     0.62
 15   5.8432  38219.16     0.19    -648.89    -0.49
 16   5.8432  38219.01     0.08    -648.86    -0.46
 17   5.8432  38219.01     0.18    -648.86    -0.45
 18   8.7720  56035.29    -0.23    -949.73     0.08
 19   8.7721  56035.29    -0.28    -949.73     0.10
 20   8.7721  56035.44    -0.17    -949.77     0.08
 21   8.7721  56035.44    -0.21    -949.77     0.09
 22  10.0948  54951.36     0.33   -1150.44    -0.03
 23  10.0951  54945.11     0.32   -1150.42    -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.

98WV24    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        39.305    39.313    39.297
ecceobj         0.043     0.043     0.043
incobj          1.514     1.514     1.514
qmin           36.356    36.315    36.323
qmax           41.956    41.997    41.912
amean          39.030    39.039    39.022
amin           38.718    38.729    38.719
amax           39.356    39.360    39.341
emean           0.044     0.044     0.044
emin            0.021     0.021     0.021
emax            0.067     0.068     0.066
imean           1.949     1.949     1.948
imin            0.694     0.692     0.695
imax            2.849     2.851     2.849
excite_mean     0.057     0.057     0.057
fracstop        1.000     1.000     1.000
cjmean          3.045     3.045     3.045

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       182.6     184.9     181.6
kozaiamp        180.0     179.9     180.0