Orbit Fit and Astrometric record for 19QY109

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: 19QY109   
# Created Tue Apr  1 01:11:14 2025
# Orbit generated from Bernstein formalism
# Fitting      8 observations of      8
# Arc:   2.03y
# First observation: 2019/08/29
#  Last observation: 2021/09/07
Preliminary a, adot, b, bdot, g, gdot:
  -0.000004   0.017227  -0.000001   0.002090   0.020384   0.000000
# Chi-squared of fit:    10.69 DOF:     10 RMS:  0.20
# Min/Max residuals:    -0.44    0.44
# Exact a, adot, b, bdot, g, gdot:
  1.124779E-05  1.724971E-02  1.889401E-06  2.094807E-03  2.040063E-02  1.192955E-03
# Covariance matrix:
  7.3663E-13  6.3047E-13 -1.3301E-14  1.1118E-13  1.6435E-12  2.7366E-11
  6.3047E-13  4.1880E-12 -6.2051E-14  5.3041E-13  5.0021E-12  1.3049E-10
 -1.3301E-14 -6.2051E-14  3.5868E-13 -2.2277E-13 -7.8938E-14 -2.0641E-12
  1.1118E-13  5.3041E-13 -2.2277E-13  3.3665E-13  6.6753E-13  1.7653E-11
  1.6435E-12  5.0021E-12 -7.8938E-14  6.6753E-13  8.0058E-12  1.6426E-10
  2.7366E-11  1.3049E-10 -2.0641E-12  1.7653E-11  1.6426E-10  4.3430E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.028239  -10.093251    0.247291   -0.017466   -0.973411  2458724.712719
# Heliocentric elements and errors
Epoch:              2458720.5000  =  2019/08/25
Mean Anomaly:          134.41175 +/-     1.543
Argument of Peri:      209.73116 +/-     1.534
Long of Asc Node:      357.87880 +/-     0.002
Inclination:             6.97996 +/-     0.002
Eccentricity:         0.10026289 +/-    0.0022
Semi-Major Axis:     46.51665673 +/-    0.0153
Time of Perihelion: 2415454.5831 +/-     496.1
Perihelion:          41.85276249 +/-    0.1040
Aphelion:            51.18055097 +/-    0.1044
Period (y)              317.2641 +/-      0.16
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           49.16972442 +/-    0.0067
Ecliptic Y           -9.01021724 +/-    0.0012
Ecliptic Z           -0.87954645 +/-    0.0001
Ecliptic XDOT         0.00057673 +/-    0.0000
Ecliptic YDOT         0.00225079 +/-    0.0000
Ecliptic ZDOT         0.00027799 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   49.99619402 +/-    0.0066
Geocenter to KBO     49.01810225 +/-    0.0068
# Hcoef:  8.66

The following table shows the complete astrometric record for 19QY109. 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 (19QY109) followed by the observatory code and reference code for the source of the astrometry.

2019 08  29.211918 23 24 31.120  -04 56 34.65  25.7r 19QY109   W84  C~7XLh      
2019 08  29.387113 23 24 30.406  -04 56 38.97  25.7r 19QY109   W84  C~7XLh      
2019 09  27.014583 23 22 41.291  -05 07 37.85  25.5r 19QY109   W84  C~7XLh      
2019 09  27.176040 23 22 40.671  -05 07 41.99  25.5r 19QY109   W84  C~7XLh      
2020 10  19.015429 23 24 50.940  -04 45 20.34  25.5r 19QY109   W84  C~7XLh      
2020 10  19.170607 23 24 50.457  -04 45 23.00  25.5r 19QY109   W84  C~7XLh      
2021 09  07.105479 23 30 50.675  -04 00 12.80  25.5r 19QY109   W84  C~7XLh      
2021 09  07.194942 23 30 50.303  -04 00 14.65  25.5r 19QY109   W84  C~7XLh      

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     0.44       0.00    -0.05
     2   0.0005    -11.51    -0.44       0.22    -0.05
     3   0.0789  -1769.72     0.16      34.65     0.29
     4   0.0793  -1779.87    -0.16      34.48    -0.18
     5   1.1411    537.48     0.03     503.55    -0.03
     6   1.1416    529.80    -0.03     503.95     0.02
     7   2.0257   6551.59     0.13     871.51    -0.19
     8   2.0260   6545.74    -0.13     872.01     0.18

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.

19QY109    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        46.540    46.587    46.496
ecceobj         0.096     0.100     0.094
incobj          6.972     6.972     6.972
qmin           41.084    40.924    41.091
qmax           52.079    52.294    51.966
amean          46.436    46.485    46.391
amin           46.048    46.093    46.012
amax           46.854    46.897    46.800
emean           0.100     0.103     0.098
emin            0.088     0.091     0.086
emax            0.112     0.116     0.110
imean           7.452     7.457     7.448
imin            7.097     7.102     7.091
imax            7.809     7.817     7.805
excite_mean     0.164     0.166     0.163
fracstop        1.000     1.000     1.000
cjmean          3.099     3.098     3.098

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       182.2     182.1     182.1
kozaiamp        180.0     180.0     180.0