Orbit Fit and Astrometric record for 19QT109

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: 19QT109   
# Created Tue Apr  1 01:11:14 2025
# Orbit generated from Bernstein formalism
# Fitting     10 observations of     10
# Arc:   2.10y
# First observation: 2019/08/28
#  Last observation: 2021/10/04
Preliminary a, adot, b, bdot, g, gdot:
   0.000022   0.025818  -0.000001   0.000874   0.025062   0.000000
# Chi-squared of fit:     1.03 DOF:     14 RMS:  0.06
# Min/Max residuals:    -0.09    0.10
# Exact a, adot, b, bdot, g, gdot:
  1.625754E-05  2.575267E-02  9.706266E-07  8.717859E-04  2.494709E-02 -6.945739E-04
# Covariance matrix:
  6.6205E-13  5.8927E-13 -3.6651E-15  2.8491E-14  1.2781E-12  1.5592E-11
  5.8927E-13  4.7055E-12 -2.2334E-14  1.7369E-13  4.7019E-12  9.5173E-11
 -3.6651E-15 -2.2334E-14  3.5320E-13 -1.9297E-13 -2.2689E-14 -4.7048E-13
  2.8491E-14  1.7369E-13 -1.9297E-13  1.8548E-13  1.7642E-13  3.6590E-12
  1.2781E-12  4.7019E-12 -2.2689E-14  1.7642E-13  6.1337E-12  9.6616E-11
  1.5592E-11  9.5173E-11 -4.7048E-13  3.6590E-12  9.6616E-11  2.0050E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.059678   -7.392372    0.309197   -0.000992   -0.955852  2458723.711696
# Heliocentric elements and errors
Epoch:              2458720.5000  =  2019/08/25
Mean Anomaly:          345.98205 +/-     0.705
Argument of Peri:       16.00280 +/-     0.902
Long of Asc Node:      353.89122 +/-     0.001
Inclination:             1.93422 +/-     0.001
Eccentricity:         0.11553767 +/-    0.0007
Semi-Major Axis:     46.17915548 +/-    0.0174
Time of Perihelion: 2463183.7311 +/-     224.3
Perihelion:          40.84372360 +/-    0.0348
Aphelion:            51.51458736 +/-    0.0367
Period (y)              313.8175 +/-      0.18
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           40.66259393 +/-    0.0039
Ecliptic Y           -5.59402202 +/-    0.0005
Ecliptic Z           -0.04171055 +/-    0.0000
Ecliptic XDOT         0.00029660 +/-    0.0000
Ecliptic YDOT         0.00281313 +/-    0.0000
Ecliptic ZDOT         0.00009553 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.04560107 +/-    0.0039
Geocenter to KBO     40.08484320 +/-    0.0040
# Hcoef:  8.97

The following table shows the complete astrometric record for 19QT109. 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 (19QT109) followed by the observatory code and reference code for the source of the astrometry.

2019 08  28.210895 23 32 56.470  -02 59 18.50  24.9r 19QT109   W84  C~7XLg      
2019 08  28.388381 23 32 55.696  -02 59 23.17  24.9r 19QT109   W84  C~7XLg      
2019 09  29.013696 23 30 34.981  -03 14 11.84  25.0r 19QT109   W84  C~7XLg      
2019 09  29.177510 23 30 34.242  -03 14 16.46  25.0r 19QT109   W84  C~7XLg      
2020 10  21.004397 23 34 24.902  -02 46 03.66  25.2r 19QT109   W84  C~7XLg      
2020 10  21.174149 23 34 24.288  -02 46 07.46  25.2r 19QT109   W84  C~7XLg      
2021 09  06.108763 23 42 59.754  -01 47 43.84  25.0r 19QT109   W84  C~7XLg      
2021 09  06.196686 23 42 59.355  -01 47 46.19  25.0r 19QT109   W84  C~7XLg      
2021 10  04.002582 23 40 55.156  -02 00 55.70  24.9r 19QT109   W84  C~7XLg      
2021 10  04.175328 23 40 54.403  -02 01 00.35  24.9r 19QT109   W84  C~7XLg      

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     0.01       0.00    -0.09
     2   0.0005    -12.50    -0.05       0.29     0.04
     3   0.0871  -2299.84     0.10      15.78     0.06
     4   0.0875  -2311.83    -0.08      15.90     0.03
     5   1.1493   1531.10     0.03     206.65    -0.05
     6   1.1498   1521.15     0.01     206.79    -0.06
     7   2.0257  10010.61     0.05     364.42    -0.03
     8   2.0260  10004.17     0.02     364.64     0.10
     9   2.1021   7977.93    -0.09     378.14    -0.03
    10   2.1026   7965.71     0.00     378.35     0.02

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.

19QT109    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        46.269    46.302    46.237
ecceobj         0.119     0.120     0.118
incobj          1.937     1.937     1.937
qmin           40.040    39.985    40.029
qmax           52.544    52.587    52.419
amean          46.102    46.134    46.071
amin           45.716    45.754    45.699
amax           46.534    46.559    46.497
emean           0.116     0.117     0.115
emin            0.102     0.103     0.101
emax            0.130     0.129     0.128
imean           2.710     2.709     2.711
imin            2.151     2.151     2.153
imax            3.216     3.215     3.219
excite_mean     0.125     0.126     0.125
fracstop        1.000     1.000     1.000
cjmean          3.108     3.108     3.108

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       176.6     176.8     176.8
kozaiamp        180.0     180.0     180.0