Orbit Fit and Astrometric record for 19TX7

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: 19TX7     
# Created Sat Dec  4 02:14:05 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     30 observations of     30
# Arc:   2.90y
# First observation: 2017/08/17
#  Last observation: 2020/07/11
# Chi-squared of fit:    41.19 DOF:     54 RMS:  0.21
# Min/Max residuals:    -0.64    0.69
# Exact a, adot, b, bdot, g, gdot:
  4.752693E-05  4.818269E-01  4.375941E-06  3.861751E-02  1.610709E-01 -1.367421E-01
# Covariance matrix:
  1.1782E-07 -3.5957E-05  3.2259E-09 -3.7033E-06 -4.5704E-06 -1.8726E-05
 -3.5957E-05  1.1392E-02 -9.8585E-07  1.1748E-03  1.3941E-03  5.9593E-03
  3.2259E-09 -9.8585E-07  8.8889E-11 -1.0328E-07 -1.2513E-07 -5.1364E-07
 -3.7033E-06  1.1748E-03 -1.0328E-07  1.6456E-04  1.4358E-04  6.1762E-04
 -4.5704E-06  1.3941E-03 -1.2513E-07  1.4358E-04  1.7729E-04  7.2601E-04
 -1.8726E-05  5.9593E-03 -5.1364E-07  6.1762E-04  7.2601E-04  3.1354E-03
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.639486  -33.393084    0.032870   -0.028833   -1.010415  2457982.876991
# Heliocentric elements and errors
Epoch:              2457982.5000  =  2017/08/17
Mean Anomaly:          357.35011 +/-     0.002
Argument of Peri:       19.45389 +/-     0.002
Long of Asc Node:      343.12919 +/-     0.001
Inclination:             4.85696 +/-     0.015
Eccentricity:         0.79641770 +/-    0.0000
Semi-Major Axis:     32.40656104 +/-    0.0000
Time of Perihelion: 2458478.4897 +/-       0.3
Perihelion:           6.59740239 +/-    0.0012
Aphelion:            58.21571968 +/-    0.0012
Period (y)              184.4835 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X            6.00489815 +/-    0.0000
Ecliptic Y           -4.00452956 +/-    0.0000
Ecliptic Z           -0.17754976 +/-    0.0000
Ecliptic XDOT         0.00258823 +/-    0.0000
Ecliptic YDOT         0.00810057 +/-    0.0000
Ecliptic ZDOT         0.00072254 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO    7.21995682 +/-    0.0000
Geocenter to KBO      6.20855718 +/-    0.0000
# Hcoef: 13.58

The following table shows the complete astrometric record for 19TX7. 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 (19TX7) followed by the observatory code and reference code for the source of the astrometry.

2017 08  17.37619  21 57 38.300  -14 11 13.45  22.1w 19TX7     F51  C~40nh      
2017 08  17.39096  21 57 38.006  -14 11 14.46  22.2w 19TX7     F51  C~40nh      
2017 08  17.40572  21 57 37.711  -14 11 15.59  22.1w 19TX7     F51  C~40nh      
2019 09  24.53746  01 35 03.261  +13 48 07.70  21.8w 19TX7     F51  C~3LVS      
2019 09  24.55082  01 35 03.027  +13 48 06.75  22.0w 19TX7     F51  C~3LVS      
2019 09  24.56417  01 35 02.793  +13 48 06.09  21.9w 19TX7     F51  C~3LVS      
2019 10  07.53177  01 31 09.347  +13 32 51.43  21.6w 19TX7     F51  C~3LVS      
2019 10  07.54409  01 31 09.106  +13 32 50.55  21.9w 19TX7     F51  C~3LVS      
2019 10  07.55636  01 31 08.861  +13 32 49.64  21.9w 19TX7     F51  C~3LVS      
2019 10  07.56867  01 31 08.625  +13 32 48.48  22.0w 19TX7     F51  C~3LVS      
2019 10  08.42237  01 30 52.14   +13 31 37.5   21.8R 19TX7     691  C~3LVS      
2019 10  08.42964  01 30 52.01   +13 31 36.9   21.9R 19TX7     691  C~3LVS      
2019 10  08.43691  01 30 51.88   +13 31 36.4   21.6R 19TX7     691  C~3LVS      
2019 10  10.22425  01 30 17.23   +13 29 03.9   21.6R 19TX7     695  C~3LVS      
2019 10  10.23524  01 30 17.02   +13 29 02.8   21.7R 19TX7     695  C~3LVS      
2019 10  10.24623  01 30 16.80   +13 29 02.2   21.3R 19TX7     695  C~3LVS      
2019 10  27.440010 01 24 39.108  +13 01 56.97  21.9w 19TX7     F51  C~59vD      
2019 10  27.452726 01 24 38.863  +13 01 55.81  21.8w 19TX7     F51  C~59vD      
2019 10  27.465522 01 24 38.617  +13 01 54.50  21.7w 19TX7     F51  C~59vD      
2019 10  27.478206 01 24 38.361  +13 01 53.14  22.0w 19TX7     F51  C~59vD      
2019 11  27.140060 01 17 08.655  +12 18 23.00  22.0G 19TX7     G37  C~3d30      
2019 11  27.154890 01 17 08.563  +12 18 22.09        19TX7     G37  C~3d30      
2020 01  18.095140 01 21 29.472  +12 30 26.62        19TX7     G37  C~3k8G      
2020 01  18.131930 01 21 30.179  +12 30 29.80        19TX7     G37  C~3k8G      
2020 01  30.223630 01 25 48.160  +12 52 19.22  22.4G 19TX7     568  C~3k8G      
2020 01  30.226891 01 25 48.237  +12 52 19.58  22.5G 19TX7     568  C~3k8G      
2020 02  26.237794 01 38 52.813  +14 01 41.64  23.0G 19TX7     568  C~3k8G      
2020 02  26.241068 01 38 52.926  +14 01 42.21  22.9G 19TX7     568  C~3k8G      
2020 07  11.605442 03 05 36.768  +21 32 52.93  21.4G 19TX7     568  C~40nh      
2020 07  11.608705 03 05 36.859  +21 32 53.58  21.9G 19TX7     568  C~40nh      

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    -0.00       0.00    -0.13
     2   0.0000      0.00     0.00       0.00     0.05
     3   0.0001      0.00    -0.01       0.00     0.11
     4   2.1031      0.00     0.29       0.00    -0.06
     5   2.1031      0.00     0.18       0.00    -0.25
     6   2.1032      0.00     0.06       0.00    -0.14
     7   2.1387      0.00    -0.04       0.00    -0.31
     8   2.1387      0.00    -0.00       0.00    -0.16
     9   2.1388      0.00    -0.04       0.00    -0.04
    10   2.1388      0.00     0.06       0.00    -0.17
    11   2.1411      0.00    -0.41       0.00     0.19
    12   2.1411      0.00    -0.20       0.00     0.21
    13   2.1412      0.00     0.01       0.00     0.33
    14   2.1461      0.00    -0.10       0.00     0.15
    15   2.1461      0.00     0.05       0.00    -0.01
    16   2.1461      0.00     0.05       0.00     0.33
    17   2.1932      0.00     0.04       0.00    -0.18
    18   2.1932      0.00     0.10       0.00    -0.08
    19   2.1933      0.00     0.17       0.00    -0.12
    20   2.1933      0.00     0.06       0.00    -0.21
    21   2.2772      0.00    -0.30       0.00    -0.03
    22   2.2773      0.00     0.35       0.00    -0.05
    23   2.4195      0.00    -0.64       0.00     0.69
    24   2.4196      0.00    -0.05       0.00     0.52
    25   2.4527      0.00     0.08       0.00    -0.07
    26   2.4527      0.00     0.08       0.00    -0.11
    27   2.5267      0.00     0.06       0.00    -0.07
    28   2.5267      0.00     0.12       0.00    -0.09
    29   2.9000      0.00     0.03       0.00    -0.17
    30   2.9000      0.00     0.01       0.00    -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.

19TX7    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        32.304    32.304    32.305
ecceobj         0.798     0.798     0.798
incobj          4.862     4.862     4.862
qmin            6.536     6.541     6.463
qmax           81.608    62.842    67.298
amean          37.209    33.877    33.924
amin           32.304    32.304    31.717
amax           44.140    34.692    36.938
emean           0.821     0.805     0.805
emin            0.798     0.798     0.792
emax            0.849     0.811     0.822
imean           6.261     6.010     6.146
imin            5.897     5.897     5.897
imax            6.505     6.073     6.421
excite_mean     0.828     0.812     0.813
fracstop        0.001     0.000     0.001
cjmean          2.073     2.139     2.138

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        33.1      23.2      31.3
kozaiamp         14.3       3.3      12.1