Orbit Fit and Astrometric record for 19QC111

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: 19QC111   
# Created Tue Apr  1 01:11:15 2025
# Orbit generated from Bernstein formalism
# Fitting      8 observations of      8
# Arc:   2.09y
# First observation: 2019/08/29
#  Last observation: 2021/10/02
Preliminary a, adot, b, bdot, g, gdot:
   0.000011   0.021149  -0.000000   0.000327   0.022925   0.000000
# Chi-squared of fit:     0.11 DOF:     10 RMS:  0.02
# Min/Max residuals:    -0.04    0.04
# Exact a, adot, b, bdot, g, gdot:
  1.456543E-05  2.114438E-02  4.534358E-08  3.270157E-04  2.288049E-02  2.765658E-04
# Covariance matrix:
  7.4131E-13  1.5953E-12 -1.2826E-15  3.1890E-14  1.8513E-12  4.6264E-11
  1.5953E-12  2.5079E-11 -1.8222E-14  4.6948E-13  1.2285E-11  6.8121E-10
 -1.2826E-15 -1.8222E-14  3.8147E-13 -1.8816E-13 -8.8968E-15 -4.9873E-13
  3.1890E-14  4.6948E-13 -1.8816E-13  1.8714E-13  2.2439E-13  1.2862E-11
  1.8513E-12  1.2285E-11 -8.8968E-15  2.2439E-13  1.0127E-11  3.2555E-10
  4.6264E-11  6.8121E-10 -4.9873E-13  1.2862E-11  3.2555E-10  1.8663E-08
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.590280  -10.156033    0.246224   -0.027021   -0.973463  2458724.712719
# Heliocentric elements and errors
Epoch:              2458720.5000  =  2019/08/25
Mean Anomaly:          160.55325 +/-    10.412
Argument of Peri:      137.59864 +/-    10.404
Long of Asc Node:       50.12839 +/-     0.032
Inclination:             1.78510 +/-     0.001
Eccentricity:         0.03306825 +/-    0.0018
Semi-Major Axis:     43.32743072 +/-    0.0180
Time of Perihelion: 2412262.6139 +/-    3012.6
Perihelion:          41.89466862 +/-    0.0780
Aphelion:            44.76019282 +/-    0.0783
Period (y)              285.2020 +/-      0.18
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           43.92199911 +/-    0.0060
Ecliptic Y           -8.12462994 +/-    0.0011
Ecliptic Z           -1.21291130 +/-    0.0002
Ecliptic XDOT         0.00048823 +/-    0.0000
Ecliptic YDOT         0.00248502 +/-    0.0000
Ecliptic ZDOT         0.00003797 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   44.68358503 +/-    0.0059
Geocenter to KBO     43.70535931 +/-    0.0061
# Hcoef:  7.35

The following table shows the complete astrometric record for 19QC111. 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 (19QC111) followed by the observatory code and reference code for the source of the astrometry.

2019 08  29.211918 23 25 10.473  -05 29 03.86  23.7r 19QC111   W84  C~7XLi      
2019 08  29.387113 23 25 09.750  -05 29 08.54  23.7r 19QC111   W84  C~7XLi      
2019 09  27.014583 23 23 09.879  -05 41 46.95  23.8r 19QC111   W84  C~7XLi      
2019 09  27.176040 23 23 09.206  -05 41 51.03  23.8r 19QC111   W84  C~7XLi      
2021 09  13.055538 23 33 00.659  -04 36 19.72  23.6r 19QC111   W84  C~7XLi      
2021 09  13.174687 23 33 00.147  -04 36 22.95  23.6r 19QC111   W84  C~7XLi      
2021 10  02.027293 23 31 41.566  -04 44 37.31  23.8r 19QC111   W84  C~7XLi      
2021 10  02.165093 23 31 40.998  -04 44 40.80  23.8r 19QC111   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     0.01       0.00     0.04
     2   0.0005    -11.77    -0.01      -0.06    -0.03
     3   0.0789  -1955.40    -0.00       5.73    -0.01
     4   0.0793  -1966.24     0.00       5.92     0.00
     5   2.0420   7707.48     0.01     133.82    -0.00
     6   2.0423   7699.16    -0.01     133.88    -0.00
     7   2.0940   6423.14     0.04     145.00     0.02
     8   2.0943   6413.96    -0.04     145.15    -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.

19QC111    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.360    43.443    43.292
ecceobj         0.030     0.034     0.032
incobj          1.785     1.785     1.786
qmin           40.815    40.915    40.473
qmax           45.922    45.897    46.064
amean          43.261    43.345    43.191
amin           42.932    43.006    42.860
amax           43.609    43.686    43.530
emean           0.034     0.034     0.040
emin            0.016     0.015     0.021
emax            0.054     0.052     0.059
imean           1.189     1.204     1.181
imin            0.180     0.241     0.108
imax            1.873     1.870     1.885
excite_mean     0.041     0.041     0.046
fracstop        1.000     1.000     1.000
cjmean          3.091     3.092     3.089

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       160.3     164.7     155.0
kozaiamp        180.0     179.9     180.0