Orbit Fit and Astrometric record for 19QJ111

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: 19QJ111   
# Created Tue Apr  1 01:11:15 2025
# Orbit generated from Bernstein formalism
# Fitting      8 observations of      8
# Arc:   2.10y
# First observation: 2019/08/30
#  Last observation: 2021/10/06
Preliminary a, adot, b, bdot, g, gdot:
   0.000013   0.022196  -0.000000   0.000372   0.023546   0.000000
# Chi-squared of fit:     0.58 DOF:     10 RMS:  0.05
# Min/Max residuals:    -0.14    0.09
# Exact a, adot, b, bdot, g, gdot:
  1.504313E-05  2.218950E-02 -1.684359E-07  3.727430E-04  2.348677E-02  3.564780E-04
# Covariance matrix:
  7.4127E-13  1.6541E-12 -8.2906E-16  3.5356E-14  1.8606E-12  4.5441E-11
  1.6541E-12  1.8119E-11 -1.0748E-14  3.5766E-13  1.1092E-11  4.5837E-10
 -8.2906E-16 -1.0748E-14  3.8128E-13 -1.8817E-13 -5.4856E-15 -2.7723E-13
  3.5356E-14  3.5766E-13 -1.8817E-13  1.8581E-13  2.1535E-13  9.1513E-12
  1.8606E-12  1.1092E-11 -5.4856E-15  2.1535E-13  9.9059E-12  2.7654E-10
  4.5441E-11  4.5837E-10 -2.7723E-13  9.1513E-12  2.7654E-10  1.1727E-08
#      lat0       lon0       xBary       yBary       zBary        JD0
   -2.408888   -7.135477    0.280835   -0.040523   -0.963432  2458725.713221
# Heliocentric elements and errors
Epoch:              2458720.5000  =  2019/08/25
Mean Anomaly:          136.13970 +/-    11.228
Argument of Peri:      154.30257 +/-    11.215
Long of Asc Node:       60.55761 +/-     0.023
Inclination:             2.53878 +/-     0.000
Eccentricity:         0.01855573 +/-    0.0032
Semi-Major Axis:     42.96327530 +/-    0.0138
Time of Perihelion: 2419822.5438 +/-    3208.1
Perihelion:          42.16606057 +/-    0.1363
Aphelion:            43.76049003 +/-    0.1363
Period (y)              281.6140 +/-      0.14
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           43.13483286 +/-    0.0057
Ecliptic Y           -5.68949035 +/-    0.0007
Ecliptic Z           -1.78955336 +/-    0.0002
Ecliptic XDOT         0.00037277 +/-    0.0000
Ecliptic YDOT         0.00256179 +/-    0.0000
Ecliptic ZDOT         0.00004144 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   43.54522485 +/-    0.0056
Geocenter to KBO     42.57715305 +/-    0.0057
# Hcoef:  8.42

The following table shows the complete astrometric record for 19QJ111. 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 (19QJ111) followed by the observatory code and reference code for the source of the astrometry.

2019 08  30.212420 23 37 36.813  -05 02 40.10  24.7r 19QJ111   W84  C~7XLi      
2019 08  30.387214 23 37 36.091  -05 02 44.92  24.7r 19QJ111   W84  C~7XLi      
2019 09  28.012277 23 35 33.824  -05 15 48.89  24.7r 19QJ111   W84  C~7XLj      
2019 09  28.177548 23 35 33.108  -05 15 53.04  24.7r 19QJ111   W84  C~7XLj      
2021 09  09.073508 23 46 12.304  -04 04 17.04  24.6r 19QJ111   W84  C~7XLj      
2021 09  09.192572 23 46 11.792  -04 04 20.35  24.6r 19QJ111   W84  C~7XLj      
2021 10  06.002765 23 44 17.375  -04 16 25.03  24.8r 19QJ111   W84  C~7XLj      
2021 10  06.167954 23 44 16.688  -04 16 29.21  24.8r 19QJ111   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    -0.02       0.00     0.09
     2   0.0005    -11.81     0.02      -0.15    -0.01
     3   0.0788  -1999.59    -0.01       3.00    -0.14
     4   0.0793  -2011.06     0.01       3.42     0.06
     5   2.0284   8469.95    -0.01     149.28    -0.03
     6   2.0287   8461.60     0.01     149.30    -0.03
     7   2.1021   6600.40     0.00     167.12     0.05
     8   2.1025   6589.30     0.00     167.38     0.01

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.

19QJ111    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.022    43.084    42.967
ecceobj         0.014     0.021     0.013
incobj          2.539     2.539     2.539
qmin           41.185    41.284    40.910
qmax           44.778    44.835    44.942
amean          42.908    42.971    42.852
amin           42.579    42.648    42.532
amax           43.239    43.301    43.188
emean           0.017     0.016     0.021
emin            0.000     0.000     0.001
emax            0.036     0.035     0.041
imean           1.132     1.125     1.144
imin            0.000     0.040     0.044
imax            1.895     1.872     1.920
excite_mean     0.027     0.026     0.031
fracstop        1.000     1.000     1.000
cjmean          3.088     3.088     3.087

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       177.5     170.3     172.6
kozaiamp        179.9     180.0     180.0