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 Thu Dec  9 02:08:22 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     26 observations of     26
# Arc:  21.99y
# First observation: 1998/11/18
#  Last observation: 2020/11/14
# Chi-squared of fit:    94.10 DOF:     46 RMS:  0.34
# Min/Max residuals:    -0.61    0.68
# Exact a, adot, b, bdot, g, gdot:
  1.557671E-05  2.754445E-02  9.543852E-07 -5.602828E-04  2.684239E-02  7.622915E-04
# Covariance matrix:
  1.4826E-13 -2.7845E-14 -9.0340E-16  4.3053E-16 -1.4367E-14 -3.1762E-14
 -2.7845E-14  1.2046E-14  5.8288E-16 -2.2688E-16 -1.1739E-14  1.6575E-14
 -9.0340E-16  5.8288E-16  9.8769E-14 -6.6862E-15 -1.4977E-15  8.7442E-16
  4.3053E-16 -2.2688E-16 -6.6862E-15  1.0026E-15  2.5839E-16 -3.4036E-16
 -1.4367E-14 -1.1739E-14 -1.4977E-15  2.5839E-16  1.6411E-13 -1.7606E-14
 -3.1762E-14  1.6575E-14  8.7442E-16 -3.4036E-16 -1.7606E-14  2.4865E-14
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.004733   43.532532   -0.212648   -0.017099   -0.961090  2451135.625531
# Heliocentric elements and errors
Epoch:              2451136.5000  =  1998/11/19
Mean Anomaly:           51.50076 +/-     0.045
Argument of Peri:      164.71728 +/-     0.050
Long of Asc Node:      183.59447 +/-     0.002
Inclination:             1.51537 +/-     0.000
Eccentricity:         0.04360025 +/-    0.0000
Semi-Major Axis:     39.23928626 +/-    0.0025
Time of Perihelion: 2438292.7684 +/-      11.4
Perihelion:          37.52844369 +/-    0.0027
Aphelion:            40.95012883 +/-    0.0029
Period (y)              245.8045 +/-      0.02
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           27.56315788 +/-    0.0004
Ecliptic Y           26.47167179 +/-    0.0004
Ecliptic Z           -0.65320025 +/-    0.0000
Ecliptic XDOT        -0.00188002 +/-    0.0000
Ecliptic YDOT         0.00209877 +/-    0.0000
Ecliptic ZDOT        -0.00005853 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   38.22174945 +/-    0.0004
Geocenter to KBO     37.25452631 +/-    0.0006
# Hcoef:  7.17

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      
2020 11  14.407770 05 06 42.174  +21 22 44.18  23.3G 98WV24    G37  C~4NCW      
2020 11  14.462350 05 06 41.842  +21 22 43.85        98WV24    G37  C~4NCW      
2020 11  14.491200 05 06 41.684  +21 22 44.04        98WV24    G37  C~4NCW      

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     0.21       0.00    -0.21
     2   0.0002      0.00     0.38       0.00    -0.42
     3   0.0226      0.00    -0.29       0.00    -0.18
     4   0.0253      0.00    -0.18       0.00    -0.44
     5   0.1783      0.00    -0.28       0.00    -0.04
     6   0.1812      0.00    -0.23       0.00    -0.12
     7   0.8061      0.00     0.32       0.00     0.11
     8   0.8062      0.00     0.25       0.00     0.08
     9   0.8936      0.00    -0.39       0.00     0.09
    10   0.8938      0.00    -0.48       0.00     0.17
    11   2.0152      0.00     0.23       0.00     0.23
    12   2.0158      0.00     0.19       0.00     0.58
    13   4.0440      0.00     0.13       0.00     0.68
    14   4.0443      0.00    -0.09       0.00     0.61
    15   5.8432      0.00     0.46       0.00    -0.38
    16   5.8432      0.00     0.35       0.00    -0.37
    17   5.8432      0.00     0.45       0.00    -0.34
    18   8.7720      0.00    -0.56       0.00    -0.02
    19   8.7721      0.00    -0.61       0.00    -0.01
    20   8.7721      0.00    -0.51       0.00    -0.01
    21   8.7721      0.00    -0.55       0.00    -0.00
    22  10.0948      0.00     0.17       0.00     0.05
    23  10.0951      0.00     0.19       0.00    -0.05
    24  21.9912      0.00     0.64       0.00    -0.20
    25  21.9913      0.00    -0.16       0.00    -0.11
    26  21.9914      0.00    -0.32       0.00     0.31

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        39.297    39.297    39.297
ecceobj         0.043     0.043     0.043
incobj          1.514     1.514     1.514
qmin           36.334    36.325    36.345
qmax           41.926    41.954    41.919
amean          39.022    39.022    39.022
amin           38.707    38.710    38.717
amax           39.346    39.342    39.342
emean           0.044     0.044     0.044
emin            0.021     0.021     0.021
emax            0.066     0.067     0.067
imean           1.948     1.948     1.948
imin            0.695     0.695     0.695
imax            2.849     2.849     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       181.4     181.1     181.4
kozaiamp        180.0     180.0     179.9