Orbit Fit and Astrometric record for 00QL252

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: 00QL252   
# Created Fri Dec  3 02:08:55 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting      9 observations of      9
# Arc:  20.22y
# First observation: 2000/07/31
#  Last observation: 2020/10/20
# Chi-squared of fit:     3.85 DOF:     12 RMS:  0.12
# Min/Max residuals:    -0.17    0.17
# Exact a, adot, b, bdot, g, gdot:
  1.580839E-05  2.832416E-02 -6.112252E-06 -1.235321E-02  2.776454E-02  5.709532E-03
# Covariance matrix:
  6.2625E-13  1.3350E-13  6.2559E-14 -4.4650E-14  1.0719E-12  1.6913E-13
  1.3350E-13  1.8191E-13  9.1904E-14 -6.4327E-14  7.9545E-13  2.5098E-13
  6.2559E-14  9.1904E-14  3.3047E-13 -5.1186E-14  3.8015E-13  1.3154E-13
 -4.4650E-14 -6.4327E-14 -5.1186E-14  2.6100E-14 -2.6768E-13 -9.1904E-14
  1.0719E-12  7.9545E-13  3.8015E-13 -2.6768E-13  4.2739E-12  1.0350E-12
  1.6913E-13  2.5098E-13  1.3154E-13 -9.1904E-14  1.0350E-12  3.5956E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
    2.986879  -23.475035    0.484526    0.046300   -0.890459  2451756.825523
# Heliocentric elements and errors
Epoch:              2451756.5000  =  2000/07/31
Mean Anomaly:           30.27683 +/-     0.025
Argument of Peri:      122.39247 +/-     0.036
Long of Asc Node:      162.47138 +/-     0.000
Inclination:            23.60460 +/-     0.000
Eccentricity:         0.25732132 +/-    0.0002
Semi-Major Axis:     46.02787321 +/-    0.0165
Time of Perihelion: 2442163.8705 +/-       9.4
Perihelion:          34.18391993 +/-    0.0144
Aphelion:            57.87182649 +/-    0.0221
Period (y)              312.2767 +/-      0.17
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           33.62217937 +/-    0.0024
Ecliptic Y          -15.12284497 +/-    0.0011
Ecliptic Z            1.87651838 +/-    0.0001
Ecliptic XDOT         0.00167941 +/-    0.0000
Ecliptic YDOT         0.00231818 +/-    0.0000
Ecliptic ZDOT        -0.00118700 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   36.91428932 +/-    0.0023
Geocenter to KBO     36.01708681 +/-    0.0027
# Hcoef:  7.53

The following table shows the complete astrometric record for 00QL252. 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 (00QL252) followed by the observatory code and reference code for the source of the astrometry.

2000 07  31.32478  22 28 39.54   -06 20 24.7   22.5R 00QL252   807  Ch1309      
2000 07  31.40464  22 28 39.18   -06 20 27.0         00QL252   807  Ch1309      
2000 08  27.14216  22 26 33.62   -06 35 28.8   22.7R 00QL252   807  Ch1309      
2000 08  27.21448  22 26 33.24   -06 35 31.5         00QL252   807  Ch1309      
2006 10  19.18611  23 04 13.29   -07 20 50.8   23.3R 00QL252   695  Ct0648      
2006 10  19.27760  23 04 13.00   -07 20 52.9         00QL252   695  Ct0648      
2006 10  20.17742  23 04 10.05   -07 21 16.5         00QL252   695  Ct0648      
2020 10  20.132700 00 30 21.157  -07 10 29.52  23.7G 00QL252   G37  C~4NCy      
2020 10  20.180590 00 30 20.954  -07 10 30.69        00QL252   G37  C~4NCy      

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     0.13       0.00    -0.15
     2   0.0002      0.00    -0.08       0.00    -0.06
     3   0.0734      0.00     0.10       0.00     0.16
     4   0.0736      0.00    -0.15       0.00     0.09
     5   6.2173      0.00    -0.17       0.00    -0.12
     6   6.2175      0.00     0.14       0.00     0.17
     7   6.2200      0.00     0.04       0.00    -0.10
     8  20.2212      0.00    -0.01       0.00    -0.04
     9  20.2214      0.00    -0.00       0.00     0.05

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.

00QL252    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        46.133    46.133    46.132
ecceobj         0.259     0.259     0.259
incobj         23.589    23.589    23.589
qmin           33.474    33.580    32.919
qmax           59.492    59.130    59.297
amean          46.139    46.098    45.827
amin           45.575    45.583    45.243
amax           46.779    46.619    46.534
emean           0.251     0.250     0.252
emin            0.229     0.230     0.228
emax            0.274     0.269     0.280
imean          23.218    23.242    23.009
imin           22.573    22.561    22.228
imax           23.917    23.931    23.878
excite_mean     0.468     0.467     0.465
fracstop        1.000     1.000     1.000
cjmean          2.855     2.856     2.855

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       179.4     179.6     181.0
kozaiamp        180.0     179.9     180.0