Orbit Fit and Astrometric record for 19QU110

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: 19QU110   
# Created Tue Apr  1 01:11:15 2025
# Orbit generated from Bernstein formalism
# Fitting      8 observations of      8
# Arc:   2.11y
# First observation: 2019/08/29
#  Last observation: 2021/10/07
Preliminary a, adot, b, bdot, g, gdot:
   0.000007   0.019954   0.000000  -0.000211   0.021996   0.000000
# Chi-squared of fit:     1.44 DOF:     10 RMS:  0.07
# Min/Max residuals:    -0.11    0.14
# Exact a, adot, b, bdot, g, gdot:
  1.383892E-05  1.991156E-02 -1.986242E-07 -2.099204E-04  2.193946E-02 -1.453705E-03
# Covariance matrix:
  7.3979E-13  5.7637E-13  2.8539E-16 -7.6135E-15  1.6353E-12  1.5112E-11
  5.7637E-13  4.3943E-12  5.1339E-15 -5.0051E-14  4.9351E-12  1.1503E-10
  2.8539E-16  5.1339E-15  3.5326E-13 -2.0444E-13  4.1000E-15  1.6093E-13
 -7.6135E-15 -5.0051E-14 -2.0444E-13  2.4661E-13 -5.4217E-14 -1.4371E-12
  1.6353E-12  4.9351E-12  4.1000E-15 -5.4217E-14  7.9541E-12  1.1757E-10
  1.5112E-11  1.1503E-10  1.6093E-13 -1.4371E-12  1.1757E-10  3.3678E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.609349   -9.202380    0.262398   -0.027226   -0.969223  2458724.712719
# Heliocentric elements and errors
Epoch:              2458720.5000  =  2019/08/25
Mean Anomaly:          257.75436 +/-     0.848
Argument of Peri:      359.63566 +/-     0.779
Long of Asc Node:      101.64608 +/-     0.045
Inclination:             1.68976 +/-     0.000
Eccentricity:         0.07844962 +/-    0.0026
Semi-Major Axis:     45.53684638 +/-    0.0286
Time of Perihelion: 2490598.0646 +/-     262.8
Perihelion:          41.96449821 +/-    0.1232
Aphelion:            49.10919455 +/-    0.1243
Period (y)              307.2930 +/-      0.29
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           45.89359420 +/-    0.0058
Ecliptic Y           -7.70743283 +/-    0.0010
Ecliptic Z           -1.28011014 +/-    0.0002
Ecliptic XDOT         0.00022610 +/-    0.0000
Ecliptic YDOT         0.00248250 +/-    0.0000
Ecliptic ZDOT        -0.00002132 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   46.55389555 +/-    0.0057
Geocenter to KBO     45.57996510 +/-    0.0059
# Hcoef:  8.45

The following table shows the complete astrometric record for 19QU110. 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 (19QU110) followed by the observatory code and reference code for the source of the astrometry.

2019 08  29.211918 23 28 43.489  -05 07 35.52  24.9r 19QU110   W84  C~7XLi      
2019 08  29.387113 23 28 42.786  -05 07 40.10  24.9r 19QU110   W84  C~7XLi      
2019 09  27.014583 23 26 47.827  -05 20 00.33  25.1r 19QU110   W84  C~7XLi      
2019 09  27.176040 23 26 47.168  -05 20 04.27  25.1r 19QU110   W84  C~7XLi      
2020 10  16.001792 23 29 48.854  -05 01 11.97  25.0r 19QU110   W84  C~7XLi      
2020 10  16.175804 23 29 48.256  -05 01 15.26  25.0r 19QU110   W84  C~7XLi      
2021 10  07.004805 23 34 36.759  -04 31 16.02  25.1r 19QU110   W84  C~7XLi      
2021 10  07.169933 23 34 36.117  -04 31 19.82  25.1r 19QU110   W84  C~7XLi      

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     0.11       0.00     0.01
     2   0.0005    -11.46    -0.11      -0.07    -0.01
     3   0.0789  -1881.46     0.05      -4.08    -0.07
     4   0.0793  -1892.06    -0.05      -3.83     0.06
     5   1.1329   1048.75    -0.06     -32.76    -0.11
     6   1.1334   1039.24     0.06     -32.25     0.14
     7   2.1076   5713.21     0.06     -85.00    -0.07
     8   2.1080   5702.88    -0.06     -84.68     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.

19QU110    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        45.633    45.702    45.566
ecceobj         0.082     0.088     0.076
incobj          1.690     1.690     1.690
qmin           40.744    40.540    40.938
qmax           50.480    50.887    50.155
amean          45.477    45.562    45.428
amin           45.105    45.189    45.062
amax           45.879    45.964    45.820
emean           0.087     0.093     0.081
emin            0.073     0.080     0.068
emax            0.101     0.107     0.095
imean           0.478     0.477     0.476
imin            0.175     0.175     0.175
imax            0.741     0.741     0.736
excite_mean     0.087     0.093     0.082
fracstop        1.000     1.000     1.000
cjmean          3.110     3.110     3.111

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       160.9     160.0     161.1
kozaiamp        180.0     180.0     179.9