Orbit Fit and Astrometric record for 19QD110

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: 19QD110   
# Created Tue Apr  1 01:11:14 2025
# Orbit generated from Bernstein formalism
# Fitting      8 observations of      8
# Arc:   2.10y
# First observation: 2019/08/28
#  Last observation: 2021/10/04
Preliminary a, adot, b, bdot, g, gdot:
  -0.000004   0.021399   0.000000  -0.000993   0.023061   0.000000
# Chi-squared of fit:     6.51 DOF:     10 RMS:  0.16
# Min/Max residuals:    -0.26    0.25
# Exact a, adot, b, bdot, g, gdot:
  1.349365E-05  2.142929E-02 -7.806244E-07 -9.954874E-04  2.307624E-02  1.115715E-03
# Covariance matrix:
  7.3911E-13  5.2650E-13  3.4755E-15 -2.9112E-14  1.4870E-12  1.4260E-11
  5.2650E-13  4.0449E-12  2.5519E-14 -2.0277E-13  4.3026E-12  1.0016E-10
  3.4755E-15  2.5519E-14  3.5596E-13 -2.0817E-13  2.4979E-14  7.0399E-13
 -2.9112E-14 -2.0277E-13 -2.0817E-13  2.6024E-13 -2.0254E-13 -5.5622E-12
  1.4870E-12  4.3026E-12  2.4979E-14 -2.0254E-13  6.6570E-12  9.9723E-11
  1.4260E-11  1.0016E-10  7.0399E-13 -5.5622E-12  9.9723E-11  2.7502E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.773412   -7.560894    0.306385   -0.012911   -0.956671  2458723.711696
# Heliocentric elements and errors
Epoch:              2458720.5000  =  2019/08/25
Mean Anomaly:          115.68119 +/-     1.279
Argument of Peri:       74.68464 +/-     1.266
Long of Asc Node:      156.19957 +/-     0.008
Inclination:             2.77106 +/-     0.001
Eccentricity:         0.05467893 +/-    0.0020
Semi-Major Axis:     43.17165712 +/-    0.0121
Time of Perihelion: 2425427.2083 +/-     367.9
Perihelion:          40.81107726 +/-    0.0889
Aphelion:            45.53223699 +/-    0.0891
Period (y)              283.6653 +/-      0.12
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           43.86487169 +/-    0.0048
Ecliptic Y           -6.13807409 +/-    0.0007
Ecliptic Z           -0.58496960 +/-    0.0001
Ecliptic XDOT         0.00047262 +/-    0.0000
Ecliptic YDOT         0.00250370 +/-    0.0000
Ecliptic ZDOT        -0.00012011 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   44.29610718 +/-    0.0048
Geocenter to KBO     43.33461671 +/-    0.0048
# Hcoef:  9.58

The following table shows the complete astrometric record for 19QD110. 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 (19QD110) followed by the observatory code and reference code for the source of the astrometry.

2019 08  28.210895 23 33 27.043  -03 42 38.59  25.8r 19QD110   W84  C~7XLh      
2019 08  28.388381 23 33 26.291  -03 42 43.42  25.8r 19QD110   W84  C~7XLh      
2019 09  29.013696 23 31 14.300  -03 57 13.06  25.9r 19QD110   W84  C~7XLh      
2019 09  29.177510 23 31 13.639  -03 57 17.19  25.9r 19QD110   W84  C~7XLh      
2020 10  18.012125 23 34 35.410  -03 39 24.18  26.0r 19QD110   W84  C~7XLh      
2020 10  18.176134 23 34 34.800  -03 39 28.11  26.0r 19QD110   W84  C~7XLh      
2021 10  04.002582 23 40 05.587  -03 07 34.08  26.1r 19QD110   W84  C~7XLh      
2021 10  04.175328 23 40 04.866  -03 07 38.56  26.1r 19QD110   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     0.25       0.00     0.02
     2   0.0005    -12.25    -0.25       0.01     0.11
     3   0.0871  -2170.63    -0.20     -18.96    -0.07
     4   0.0875  -2181.35     0.21     -18.85     0.02
     5   1.1411   1016.89     0.25    -225.96    -0.05
     6   1.1416   1006.95    -0.26    -225.96    -0.13
     7   2.1021   6315.04     0.08    -430.55    -0.02
     8   2.1026   6303.34    -0.08    -430.37     0.12

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.

19QD110    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.211    43.252    43.172
ecceobj         0.050     0.053     0.048
incobj          2.763     2.763     2.763
qmin           40.305    40.221    40.349
qmax           46.134    46.262    45.973
amean          43.104    43.144    43.062
amin           42.770    42.809    42.727
amax           43.446    43.497    43.411
emean           0.042     0.045     0.040
emin            0.024     0.027     0.023
emax            0.062     0.064     0.060
imean           3.037     3.032     3.046
imin            2.036     2.048     2.025
imax            3.814     3.800     3.836
excite_mean     0.069     0.070     0.068
fracstop        1.000     1.000     1.000
cjmean          3.085     3.085     3.085

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       181.5     182.1     181.4
kozaiamp        180.0     180.0     180.0