Orbit Fit and Astrometric record for 19QQ8

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: 19QQ8     
# Created Sat Dec  4 02:14:04 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     40 observations of     40
# Arc:   3.96y
# First observation: 2016/06/05
#  Last observation: 2020/05/20
# Chi-squared of fit:    17.24 DOF:     74 RMS:  0.12
# Min/Max residuals:    -0.25    0.47
# Exact a, adot, b, bdot, g, gdot:
  3.798125E-05  3.057099E-01  1.431588E-05  1.123206E-01  1.277310E-01 -1.731611E-01
# Covariance matrix:
  1.5041E-09 -1.0579E-06  4.4588E-10  3.6525E-07 -1.5307E-10 -1.6017E-06
 -1.0579E-06  1.4249E-03 -3.0018E-07 -4.9399E-04  1.0585E-07  2.1592E-03
  4.4588E-10 -3.0018E-07  1.3302E-10  1.0346E-07 -4.5428E-11 -4.5439E-07
  3.6525E-07 -4.9399E-04  1.0346E-07  1.7617E-04 -3.6542E-08 -7.5091E-04
 -1.5307E-10  1.0585E-07 -4.5428E-11 -3.6542E-08  1.5587E-11  1.6027E-07
 -1.6017E-06  2.1592E-03 -4.5439E-07 -7.5091E-04  1.6027E-07  3.2821E-03
#      lat0       lon0       xBary       yBary       zBary        JD0
   16.663207 -117.341507   -0.217184    0.283336   -0.946276  2457544.862444
# Heliocentric elements and errors
Epoch:              2457544.5000  =  2016/06/05
Mean Anomaly:          358.10587 +/-     0.001
Argument of Peri:       97.93136 +/-     0.000
Long of Asc Node:      206.89730 +/-     0.000
Inclination:            23.60563 +/-     0.000
Eccentricity:         0.88819259 +/-    0.0000
Semi-Major Axis:     61.05351069 +/-    0.0000
Time of Perihelion: 2458461.2927 +/-       0.4
Perihelion:           6.82623508 +/-    0.0002
Aphelion:           115.28078631 +/-    0.0002
Period (y)              477.0613 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           -3.70901231 +/-    0.0000
Ecliptic Y           -7.64208812 +/-    0.0000
Ecliptic Z            2.24508846 +/-    0.0000
Ecliptic XDOT         0.00777161 +/-    0.0000
Ecliptic YDOT         0.00075512 +/-    0.0000
Ecliptic ZDOT         0.00124214 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO    8.78644022 +/-    0.0000
Geocenter to KBO      7.82915490 +/-    0.0000
# Hcoef: 13.85

The following table shows the complete astrometric record for 19QQ8. 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 (19QQ8) followed by the observatory code and reference code for the source of the astrometry.

2016 06  05.361655 16 15 15.726  -04 19 30.82  23.2G 19QQ8     F51  C~3THF      
2016 06  05.372246 16 15 15.537  -04 19 29.84  22.6G 19QQ8     F51  C~3THF      
2016 06  05.382914 16 15 15.376  -04 19 28.98  22.3G 19QQ8     F51  C~3THF      
2017 05  26.499214 17 45 09.026  -00 39 44.48  22.5G 19QQ8     F51  C~3THF      
2017 05  26.511269 17 45 08.846  -00 39 42.66  23.6G 19QQ8     F51  C~3THF      
2017 05  26.523325 17 45 08.647  -00 39 40.93  23.3G 19QQ8     F51  C~3THF      
2017 06  21.428136 17 37 32.088  +00 00 38.44  22.1G 19QQ8     F51  C~3THF      
2017 06  21.440221 17 37 31.861  +00 00 38.92  22.4G 19QQ8     F51  C~3THF      
2019 05  29.570464 21 31 25.594  +09 21 08.18  22.5G 19QQ8     F51  C~3CrS      
2019 05  29.579842 21 31 25.681  +09 21 10.04  22.3G 19QQ8     F51  C~3CrS      
2019 05  29.588795 21 31 25.750  +09 21 11.66  22.8G 19QQ8     F51  C~3CrS      
2019 05  29.597760 21 31 25.813  +09 21 13.39  22.8G 19QQ8     F51  C~3CrS      
2019 06  01.560945 21 31 48.565  +09 30 40.35  22.6G 19QQ8     F51  C~3CrS      
2019 06  01.572278 21 31 48.653  +09 30 42.47  22.5G 19QQ8     F51  C~3CrS      
2019 06  01.583620 21 31 48.703  +09 30 44.55  22.6G 19QQ8     F51  C~3CrS      
2019 06  01.594977 21 31 48.781  +09 30 46.76  22.4G 19QQ8     F51  C~3CrS      
2019 07  28.527998 21 26 04.041  +10 41 24.40  22.0G 19QQ8     F51  C~3CrS      
2019 07  28.528745 21 26 04.035  +10 41 24.31  22.1G 19QQ8     F51  C~3CrS      
2019 07  28.539454 21 26 03.847  +10 41 23.65  22.3G 19QQ8     F51  C~3CrS      
2019 07  28.540200 21 26 03.840  +10 41 23.45  22.4G 19QQ8     F51  C~3CrS      
2019 07  28.550856 21 26 03.665  +10 41 23.16  22.3G 19QQ8     F51  C~3CrS      
2019 07  28.551613 21 26 03.661  +10 41 22.83  22.0G 19QQ8     F51  C~3CrS      
2019 07  28.562269 21 26 03.479  +10 41 22.34  22.2G 19QQ8     F51  C~3CrS      
2019 07  28.563028 21 26 03.465  +10 41 22.20  22.0G 19QQ8     F51  C~3CrS      
2019 08  28.32331  21 17 34.793  +09 36 33.62  22.4w 19QQ8     F51  C~3CrS      
2019 08  28.33429  21 17 34.618  +09 36 31.64  22.2w 19QQ8     F51  C~3CrS      
2019 08  28.34525  21 17 34.447  +09 36 29.48  22.3w 19QQ8     F51  C~3CrS      
2019 08  28.35630  21 17 34.271  +09 36 27.63  22.4w 19QQ8     F51  C~3CrS      
2019 09  01.15323  21 16 38.08   +09 24 24.5   22.0G 19QQ8     807  C~3CrS      
2019 09  01.16878  21 16 37.85   +09 24 21.4   22.1G 19QQ8     807  C~3CrS      
2019 09  01.18366  21 16 37.63   +09 24 18.5   22.2G 19QQ8     807  C~3CrS      
2019 09  06.36861  21 15 27.11   +09 06 47.7   22.0R 19QQ8     291  C~3CrS      
2019 09  06.38792  21 15 26.87   +09 06 43.7   22.3R 19QQ8     291  C~3CrS      
2019 09  06.40724  21 15 26.63   +09 06 39.9   22.1R 19QQ8     291  C~3CrS      
2019 12  03.198670 21 26 10.538  +04 43 58.27  22.8G 19QQ8     568  C~3d2M      
2019 12  03.201239 21 26 10.608  +04 43 58.13  22.8G 19QQ8     568  C~3d2M      
2019 12  03.203808 21 26 10.681  +04 43 58.00  22.7G 19QQ8     568  C~3d2M      
2020 05  20.596904 23 06 33.576  +11 15 45.16  22.6G 19QQ8     568  C~3xsR      
2020 05  20.599472 23 06 33.628  +11 15 45.65  22.5G 19QQ8     568  C~3xsR      
2020 05  20.602040 23 06 33.685  +11 15 46.14  22.0G 19QQ8     568  C~3xsR      

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    -0.04       0.00    -0.08
     2   0.0000      0.00    -0.12       0.00     0.00
     3   0.0001      0.00     0.25       0.00    -0.04
     4   0.9723      0.00    -0.10       0.00    -0.14
     5   0.9723      0.00     0.12       0.00     0.07
     6   0.9724      0.00     0.05       0.00     0.19
     7   1.0433      0.00    -0.13       0.00     0.17
     8   1.0433      0.00    -0.12       0.00     0.04
     9   2.9794      0.00    -0.14       0.00    -0.07
    10   2.9794      0.00     0.04       0.00    -0.05
    11   2.9794      0.00     0.01       0.00    -0.18
    12   2.9794      0.00    -0.11       0.00    -0.21
    13   2.9875      0.00     0.08       0.00    -0.11
    14   2.9876      0.00     0.31       0.00    -0.12
    15   2.9876      0.00    -0.03       0.00    -0.16
    16   2.9876      0.00     0.05       0.00    -0.08
    17   3.1435      0.00    -0.00       0.00     0.07
    18   3.1435      0.00     0.09       0.00     0.02
    19   3.1435      0.00    -0.10       0.00    -0.01
    20   3.1435      0.00    -0.02       0.00    -0.17
    21   3.1436      0.00    -0.02       0.00     0.17
    22   3.1436      0.00     0.10       0.00    -0.12
    23   3.1436      0.00    -0.01       0.00     0.02
    24   3.1436      0.00    -0.04       0.00    -0.08
    25   3.2278      0.00    -0.01       0.00     0.02
    26   3.2279      0.00    -0.03       0.00     0.06
    27   3.2279      0.00    -0.00       0.00    -0.07
    28   3.2279      0.00    -0.03       0.00     0.12
    29   3.2383      0.00    -0.02       0.00    -0.03
    30   3.2383      0.00    -0.01       0.00    -0.08
    31   3.2384      0.00     0.00       0.00    -0.05
    32   3.2526      0.00    -0.25       0.00     0.18
    33   3.2526      0.00    -0.04       0.00     0.22
    34   3.2527      0.00     0.15       0.00     0.47
    35   3.4931      0.00    -0.02       0.00    -0.06
    36   3.4931      0.00    -0.03       0.00    -0.03
    37   3.4931      0.00     0.01       0.00     0.01
    38   3.9568      0.00    -0.01       0.00     0.03
    39   3.9568      0.00    -0.06       0.00     0.04
    40   3.9569      0.00    -0.03       0.00     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.

19QQ8    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        57.872    57.870    57.874
ecceobj         0.883     0.883     0.883
incobj         23.774    23.774    23.774
qmin            6.624     6.627     6.595
qmax          112.731   124.830   117.927
amean          50.754    56.687    52.923
amin           43.898    48.412    39.078
amax           59.847    65.729    62.365
emean           0.864     0.878     0.869
emin            0.845     0.857     0.825
emax            0.887     0.899     0.891
imean          23.541    24.060    23.824
imin           23.278    23.757    23.325
imax           24.075    24.378    24.614
excite_mean     0.952     0.968     0.959
fracstop        0.005     0.006     0.009
cjmean          1.799     1.735     1.774

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       102.0     105.3     110.6
kozaiamp          6.2       7.2      12.6