Orbit Fit and Astrometric record for 19QN111

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: 19QN111   
# Created Tue Apr  1 01:11:15 2025
# Orbit generated from Bernstein formalism
# Fitting     10 observations of     10
# Arc:   2.10y
# First observation: 2019/08/30
#  Last observation: 2021/10/06
Preliminary a, adot, b, bdot, g, gdot:
  -0.000002   0.020305  -0.000000   0.000169   0.022202   0.000000
# Chi-squared of fit:     3.49 DOF:     14 RMS:  0.10
# Min/Max residuals:    -0.17    0.23
# Exact a, adot, b, bdot, g, gdot:
  1.449680E-05  2.033102E-02 -6.798534E-08  1.694853E-04  2.221529E-02  6.949016E-04
# Covariance matrix:
  7.3901E-13  6.6829E-13 -2.8862E-15  3.9063E-15  1.6517E-12  1.8346E-11
  6.6829E-13  4.1555E-12 -1.0109E-14  3.0140E-14  5.2121E-12  1.0290E-10
 -2.8862E-15 -1.0109E-14  3.3942E-13 -2.1530E-13 -1.4896E-14 -2.5101E-13
  3.9063E-15  3.0140E-14 -2.1530E-13  2.4166E-13  3.3258E-14  8.6293E-13
  1.6517E-12  5.2121E-12 -1.4896E-14  3.3258E-14  8.0684E-12  1.2543E-10
  1.8346E-11  1.0290E-10 -2.5101E-13  8.6293E-13  1.2543E-10  2.8239E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
   -2.655036   -7.880121    0.268279   -0.044827   -0.966814  2458725.713221
# Heliocentric elements and errors
Epoch:              2458720.5000  =  2019/08/25
Mean Anomaly:          122.59576 +/-     2.155
Argument of Peri:      153.89836 +/-     2.154
Long of Asc Node:       71.66813 +/-     0.030
Inclination:             2.63984 +/-     0.000
Eccentricity:         0.03814663 +/-    0.0021
Semi-Major Axis:     45.01493008 +/-    0.0109
Time of Perihelion: 2421153.5218 +/-     660.1
Perihelion:          43.29776208 +/-    0.0956
Aphelion:            46.73209808 +/-    0.0957
Period (y)              302.0251 +/-      0.11
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           45.46588932 +/-    0.0057
Ecliptic Y           -6.57023346 +/-    0.0008
Ecliptic Z           -2.08516874 +/-    0.0003
Ecliptic XDOT         0.00043769 +/-    0.0000
Ecliptic YDOT         0.00247069 +/-    0.0000
Ecliptic ZDOT         0.00001667 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   45.98546496 +/-    0.0056
Geocenter to KBO     45.01404363 +/-    0.0058
# Hcoef:  8.66

The following table shows the complete astrometric record for 19QN111. 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 (19QN111) followed by the observatory code and reference code for the source of the astrometry.

2019 08  30.212420 23 35 15.666  -05 33 54.46  25.1r 19QN111   W84  C~7XLj      
2019 08  30.387214 23 35 14.974  -05 33 59.08  25.1r 19QN111   W84  C~7XLj      
2019 09  28.012277 23 33 18.582  -05 46 25.90  25.1r 19QN111   W84  C~7XLj      
2019 09  28.177548 23 33 17.914  -05 46 29.87  25.1r 19QN111   W84  C~7XLj      
2020 10  20.004233 23 36 11.080  -05 26 39.00  25.2r 19QN111   W84  C~7XLj      
2020 10  20.172968 23 36 10.485  -05 26 41.97  25.2r 19QN111   W84  C~7XLj      
2020 10  22.003924 23 36 04.554  -05 27 16.04  25.3r 19QN111   W84  C~7XLj      
2020 10  22.173214 23 36 03.995  -05 27 19.10  25.3r 19QN111   W84  C~7XLj      
2021 10  06.002765 23 41 19.293  -04 53 16.50  25.3r 19QN111   W84  C~7XLj      
2021 10  06.167954 23 41 18.628  -04 53 20.76  25.3r 19QN111   W84  C~7XLj      

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     0.04
     2   0.0005    -11.32     0.01      -0.15    -0.04
     3   0.0788  -1902.42    -0.07       1.04    -0.06
     4   0.0793  -1913.15     0.07       1.33     0.02
     5   1.1411    932.19     0.10      72.15    -0.12
     6   1.1416    922.86    -0.16      72.95     0.23
     7   1.1466    828.04     0.06      76.76    -0.03
     8   1.1471    819.17     0.00      77.25     0.01
     9   2.1021   5954.84     0.17      81.14     0.10
    10   2.1025   5944.01    -0.17      81.18    -0.14

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.

19QN111    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        45.069    45.102    45.036
ecceobj         0.033     0.034     0.033
incobj          2.641     2.641     2.641
qmin           42.688    42.686    42.603
qmax           47.436    47.447    47.353
amean          44.947    44.979    44.914
amin           44.603    44.629    44.567
amax           45.308    45.337    45.279
emean           0.033     0.033     0.033
emin            0.019     0.020     0.019
emax            0.047     0.047     0.046
imean           1.214     1.215     1.213
imin            0.730     0.737     0.723
imax            1.666     1.665     1.667
excite_mean     0.039     0.040     0.039
fracstop        1.000     1.000     1.000
cjmean          3.111     3.112     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       211.3     212.7     209.3
kozaiamp        180.0     180.0     180.0