Orbit Fit and Astrometric record for 13TD229

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: 13TD229   
# Created Sat Nov 27 02:12:15 2021
# Orbit generated from Bernstein formalism
# Fitting     15 observations of     15
# Arc:   4.91y
# First observation: 2013/10/13
#  Last observation: 2018/09/11
Preliminary a, adot, b, bdot, g, gdot:
   0.000023   0.022782   0.000000  -0.000034   0.023726   0.000000
# Chi-squared of fit:     4.19 DOF:     24 RMS:  0.09
# Min/Max residuals:    -0.22    0.22
# Exact a, adot, b, bdot, g, gdot:
  1.494337E-05  2.296411E-02 -3.765959E-07 -3.247391E-05  2.381954E-02  1.924912E-03
# Covariance matrix:
  4.4362E-13 -2.2643E-13 -1.6770E-15  3.0121E-17  1.6403E-13 -9.2109E-13
 -2.2643E-13  3.7966E-13 -1.4296E-15  7.3312E-17  2.2440E-13  3.4438E-12
 -1.6770E-15 -1.4296E-15  3.1643E-13 -9.3486E-14 -8.4388E-15 -2.7224E-14
  3.0121E-17  7.3312E-17 -9.3486E-14  4.0213E-14  2.4555E-16  1.0783E-15
  1.6403E-13  2.2440E-13 -8.4388E-15  2.4555E-16  9.9226E-13  3.7091E-12
 -9.2109E-13  3.4438E-12 -2.7224E-14  1.0783E-15  3.7091E-12  3.7369E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -3.802135   10.159063   -0.164254   -0.065120   -0.981641  2456578.650868
# Heliocentric elements and errors
Epoch:              2456570.5000  =  2013/10/05
Mean Anomaly:           73.13295 +/-     0.061
Argument of Peri:      185.81673 +/-     0.085
Long of Asc Node:      101.61290 +/-     0.008
Inclination:             3.71604 +/-     0.000
Eccentricity:         0.08692399 +/-    0.0003
Semi-Major Axis:     43.75288165 +/-    0.0065
Time of Perihelion: 2435096.2001 +/-      17.2
Perihelion:          39.94970645 +/-    0.0128
Aphelion:            47.55605686 +/-    0.0134
Period (y)              289.4131 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           42.17197559 +/-    0.0017
Ecliptic Y            7.72685739 +/-    0.0003
Ecliptic Z           -2.78394545 +/-    0.0001
Ecliptic XDOT        -0.00025467 +/-    0.0000
Ecliptic YDOT         0.00263559 +/-    0.0000
Ecliptic ZDOT        -0.00001826 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   42.96428985 +/-    0.0017
Geocenter to KBO     41.98233899 +/-    0.0018
# Hcoef:  7.02

The following table shows the complete astrometric record for 13TD229. 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 (13TD229) followed by the observatory code and reference code for the source of the astrometry.

2013 10  13.15009  00 43 18.640  +00 31 30.83  23.1i 13TD229   W84  C~52Rg      
2013 11  08.18263  00 41 34.811  +00 21 30.22  23.5r 13TD229   W84  C~52Rg      
2013 11  08.18400  00 41 34.799  +00 21 30.09  22.8i 13TD229   W84  C~52Rg      
2014 10  29.21054  00 47 02.246  +00 55 39.76  23.7r 13TD229   W84  C~52Rg      
2014 10  29.22180  00 47 02.205  +00 55 39.26  22.8i 13TD229   W84  C~52Rg      
2014 11  14.13269  00 46 04.488  +00 50 25.16  23.8r 13TD229   W84  C~52Rg      
2016 09  01.37155  01 00 33.728  +02 21 41.03  22.5i 13TD229   W84  C~52Rg      
2016 09  01.37293  01 00 33.724  +02 21 40.80  23.2r 13TD229   W84  C~52Rg      
2016 11  07.19299  00 56 00.626  +01 53 02.77  22.9z 13TD229   W84  C~52Rg      
2016 11  07.19435  00 56 00.612  +01 53 02.77  23.3i 13TD229   W84  C~52Rg      
2016 11  18.09231  00 55 23.424  +01 49 49.58  23.7r 13TD229   W84  C~52Rg      
2017 08  28.28539  01 05 32.400  +02 53 18.89  23.3i 13TD229   W84  C~52Rg      
2017 08  28.28676  01 05 32.401  +02 53 18.94  23.2r 13TD229   W84  C~52Rg      
2017 09  24.28844  01 03 53.105  +02 41 52.22  22.9i 13TD229   W84  C~52Rg      
2018 09  11.33485  01 09 30.541  +03 17 36.71  23.6r 13TD229   W84  C~52Rg      

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     0.06       0.00     0.07
     2   0.0713  -1668.24     0.01      57.21    -0.00
     3   0.0713  -1668.46    -0.13      57.16    -0.06
     4   1.0433   3653.74     0.07      20.37     0.03
     5   1.0433   3652.98     0.04      20.15    -0.22
     6   1.0869   2733.23    -0.03      69.93     0.03
     7   2.8863  16907.43     0.04      17.80     0.17
     8   2.8863  16907.29    -0.02      17.61    -0.01
     9   3.0692  12445.12     0.13      32.94    -0.09
    10   3.0693  12444.93     0.02      33.02    -0.02
    11   3.0991  11854.18    -0.12      72.96     0.22
    12   3.8744  21811.62    -0.11      23.36    -0.03
    13   3.8744  21811.65    -0.00      23.41     0.02
    14   3.9484  20157.06    -0.07     -30.69     0.04
    15   4.9122  25715.96     0.10     -19.27    -0.16

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.

13TD229    quality flag:2

Type:       SCATNEAR CLASSICAL  SCATNEAR

axisobj        44.016    44.037    43.996
ecceobj         0.090     0.090     0.090
incobj          3.717     3.717     3.717
qmin           37.101    38.995    37.961
qmax           50.942    48.931    49.836
amean          43.716    43.810    43.698
amin           43.278    43.443    43.291
amax           44.226    44.216    44.189
emean           0.107     0.086     0.082
emin            0.053     0.061     0.039
emax            0.152     0.108     0.129
imean           2.299     2.226     2.215
imin            1.107     1.159     1.023
imax            3.585     3.147     3.239
excite_mean     0.115     0.095     0.092
fracstop        1.000     1.000     1.000
cjmean          3.081     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       181.9     175.2     190.0
kozaiamp        180.0     180.0     180.0