Orbit Fit and Astrometric record for 98HO151

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: 98HO151   
# Created Mon Dec  6 02:08:21 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     19 observations of     19
# Arc:  18.94y
# First observation: 1998/04/22
#  Last observation: 2017/03/30
# Chi-squared of fit:    59.33 DOF:     32 RMS:  0.31
# Min/Max residuals:    -0.67    0.66
# Exact a, adot, b, bdot, g, gdot:
  1.360603E-05  1.997235E-02  2.629310E-06  3.041082E-03  2.261689E-02 -7.096854E-04
# Covariance matrix:
  1.3257E-13 -3.5294E-14  4.3865E-15 -4.1842E-15  5.9887E-14 -6.6224E-14
 -3.5294E-14  4.0315E-14 -5.2442E-15  5.8184E-15 -4.8703E-14  9.4132E-14
  4.3865E-15 -5.2442E-15  1.1259E-13 -7.8110E-15  2.6850E-14 -1.1034E-14
 -4.1842E-15  5.8184E-15 -7.8110E-15  2.2073E-15 -6.1865E-15  1.4139E-14
  5.9887E-14 -4.8703E-14  2.6850E-14 -6.1865E-15  9.1157E-13 -4.9248E-14
 -6.6224E-14  9.4132E-14 -1.1034E-14  1.4139E-14 -4.9248E-14  2.3283E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
   14.759602 -178.031502   -0.500003    0.223612   -0.849603  2450925.794391
# Heliocentric elements and errors
Epoch:              2450926.5000  =  1998/04/23
Mean Anomaly:          196.73661 +/-     0.043
Argument of Peri:      226.30033 +/-     0.020
Long of Asc Node:      123.56613 +/-     0.000
Inclination:            16.75225 +/-     0.000
Eccentricity:         0.09780852 +/-    0.0001
Semi-Major Axis:     41.17453312 +/-    0.0062
Time of Perihelion: 2494691.5825 +/-      16.6
Perihelion:          37.14731283 +/-    0.0074
Aphelion:            45.20175340 +/-    0.0083
Period (y)              264.2112 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -43.58312504 +/-    0.0018
Ecliptic Y           -2.00173341 +/-    0.0001
Ecliptic Z           11.26444373 +/-    0.0005
Ecliptic XDOT         0.00026182 +/-    0.0000
Ecliptic YDOT        -0.00240152 +/-    0.0000
Ecliptic ZDOT         0.00033401 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   45.05979211 +/-    0.0017
Geocenter to KBO     44.21481041 +/-    0.0019
# Hcoef:  7.99

The following table shows the complete astrometric record for 98HO151. 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 (98HO151) followed by the observatory code and reference code for the source of the astrometry.

1998 04  22.29366  12 31 04.04   +12 44 24.3   24.4R 98HO151   568  Ca4825      
1998 04  22.33617  12 31 03.86   +12 44 24.9   24.4R 98HO151   568  Ca4825      
1998 04  22.38721  12 31 03.66   +12 44 25.9   24.4R 98HO151   568  Ca4825      
1998 05  01.42749  12 30 30.24   +12 46 30.0   24.4R 98HO151   568  Ca4825      
1998 05  01.43914  12 30 30.20   +12 46 30.2   24.4R 98HO151   568  Ca4825      
1998 05  01.45082  12 30 30.16   +12 46 30.4   24.4R 98HO151   568  Ca4825      
1998 05  22.24529  12 29 29.37   +12 48 06.7   24.4R 98HO151   568  Ca4825      
1998 05  22.25692  12 29 29.31   +12 48 06.3   24.4R 98HO151   568  Ca4825      
1998 05  22.30786  12 29 29.20   +12 48 06.4   24.4R 98HO151   568  Ca4825      
1999 03  10.58059  12 38 37.36   +12 06 50.2   24.4R 98HO151   568  Ca4825      
1999 03  10.60152  12 38 37.27   +12 06 50.9   24.4R 98HO151   568  Ca4825      
1999 05  07.41074  12 34 43.69   +12 29 01.6   24.4R 98HO151   568  Ca4825      
1999 05  07.46740  12 34 43.51   +12 29 02.0   24.4R 98HO151   568  Ca4825      
2005 04  15.21512  13 03 27.07   +10 25 38.5   22.5R 98HO151   304  Cn3196      
2005 04  15.25417  13 03 26.83   +10 25 39.9         98HO151   304  Cn3196      
2015 03  16.43473  13 50 58.29   +06 33 14.6   23.5R 98HO151   G37  C~1N5b      
2015 03  16.48875  13 50 58.12   +06 33 16.5         98HO151   G37  C~1N5b      
2017 03  30.342008 13 59 12.14   +05 54 40.6         98HO151   W84  C~3i8o      
2017 03  30.344832 13 59 12.14   +05 54 40.4         98HO151   W84  C~3i8o      

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    -0.12
     2   0.0001      0.00    -0.15       0.00    -0.23
     3   0.0003      0.00    -0.12       0.00    -0.06
     4   0.0250      0.00     0.20       0.00    -0.02
     5   0.0250      0.00     0.22       0.00     0.05
     6   0.0251      0.00     0.25       0.00     0.12
     7   0.0820      0.00     0.40       0.00     0.23
     8   0.0820      0.00    -0.08       0.00    -0.15
     9   0.0822      0.00     0.07       0.00     0.05
    10   0.8824      0.00    -0.21       0.00    -0.66
    11   0.8824      0.00    -0.29       0.00    -0.67
    12   1.0407      0.00    -0.27       0.00     0.46
    13   1.0409      0.00    -0.13       0.00     0.41
    14   6.9813      0.00     0.61       0.00     0.15
    15   6.9814      0.00    -0.46       0.00     0.66
    16  16.8984      0.00     0.17       0.00    -0.03
    17  16.8985      0.00     0.47       0.00     0.08
    18  18.9378      0.00    -0.40       0.00    -0.02
    19  18.9379      0.00    -0.23       0.00    -0.30

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.

98HO151    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        41.185    41.185    41.185
ecceobj         0.097     0.097     0.097
incobj         16.732    16.732    16.732
qmin           36.770    36.757    36.728
qmax           46.433    46.435    46.382
amean          41.452    41.450    41.458
amin           41.126    41.111    41.121
amax           41.806    41.805    41.817
emean           0.093     0.093     0.093
emin            0.076     0.076     0.077
emax            0.111     0.111     0.110
imean          15.257    15.251    15.256
imin           14.389    14.387    14.390
imax           16.151    16.157    16.153
excite_mean     0.279     0.279     0.279
fracstop        1.000     1.000     1.000
cjmean          2.980     2.980     2.980

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       181.0     181.1     181.1
kozaiamp        180.0     180.0     180.0