Orbit Fit and Astrometric record for 13TM228

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: 13TM228   
# Created Tue Apr  1 01:09:48 2025
# Orbit generated from Bernstein formalism
# Fitting     15 observations of     15
# Arc:   4.93y
# First observation: 2013/10/13
#  Last observation: 2018/09/17
Preliminary a, adot, b, bdot, g, gdot:
   0.000144   0.026275   0.000003  -0.000529   0.026763   0.000000
# Chi-squared of fit:     5.52 DOF:     24 RMS:  0.11
# Min/Max residuals:    -0.35    0.19
# Exact a, adot, b, bdot, g, gdot:
  1.647774E-05  2.626595E-02 -1.264750E-06 -5.260240E-04  2.560163E-02  8.346490E-06
# Covariance matrix:
  4.8876E-13 -2.4090E-13 -1.3743E-15  2.3592E-15  1.8637E-13 -9.4935E-13
 -2.4090E-13  3.3885E-13  3.2114E-15 -6.0714E-15  1.6047E-13  2.4734E-12
 -1.3743E-15  3.2114E-15  3.6702E-13 -9.7976E-14  2.3746E-15  2.6753E-14
  2.3592E-15 -6.0714E-15 -9.7976E-14  3.5726E-14 -5.6412E-15 -5.1532E-14
  1.8637E-13  1.6047E-13  2.3746E-15 -5.6412E-15  1.3482E-12  2.3549E-12
 -9.4935E-13  2.4734E-12  2.6753E-14 -5.1532E-14  2.3549E-12  2.1041E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.116992   -3.300734   -0.387685   -0.001766   -0.919003  2456578.585128
# Heliocentric elements and errors
Epoch:              2456570.5000  =  2013/10/05
Mean Anomaly:            6.44889 +/-     0.144
Argument of Peri:      178.31056 +/-     0.165
Long of Asc Node:      171.55052 +/-     0.004
Inclination:             1.15005 +/-     0.000
Eccentricity:         0.06553434 +/-    0.0001
Semi-Major Axis:     42.76220007 +/-    0.0082
Time of Perihelion: 2454740.8388 +/-      40.8
Perihelion:          39.95980770 +/-    0.0097
Aphelion:            45.56459245 +/-    0.0106
Period (y)              279.6393 +/-      0.08
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           39.93447063 +/-    0.0018
Ecliptic Y           -1.91174736 +/-    0.0001
Ecliptic Z           -0.07983482 +/-    0.0000
Ecliptic XDOT         0.00015634 +/-    0.0000
Ecliptic YDOT         0.00280274 +/-    0.0000
Ecliptic ZDOT        -0.00005611 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   39.98028384 +/-    0.0018
Geocenter to KBO     39.06000645 +/-    0.0018
# Hcoef:  7.63

The following table shows the complete astrometric record for 13TM228. 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 (13TM228) followed by the observatory code and reference code for the source of the astrometry.

2013 10  13.08435  23 48 04.222  -01 25 10.96  23.1i 13TM228   W84  C~52Rf      
2013 10  28.05379  23 47 06.935  -01 31 26.20  23.6r 13TM228   W84  C~52Rf      
2013 11  23.08533  23 46 02.221  -01 38 30.22  23.7r 13TM228   W84  C~52Rf      
2014 10  21.20581  23 53 06.079  -00 54 29.74  23.7r 13TM228   W84  C~52Rf      
2015 11  07.05482  23 57 40.685  -00 26 44.66  23.0i 13TM228   W84  C~52Rf      
2016 09  11.19828  00 07 08.937  +00 33 06.47  23.5i 13TM228   W84  C~52Rf      
2016 09  22.11486  00 06 19.046  +00 27 38.35  23.9r 13TM228   W84  C~52Rf      
2016 10  02.16787  00 05 32.583  +00 22 33.32  23.4r 13TM228   W84  C~52Rf      
2016 12  05.08483  00 02 15.134  +00 01 03.39  23.7r 13TM228   W84  C~52Rf      
2017 09  27.18691  00 11 30.163  +00 59 21.37  23.3r 13TM228   W84  C~52Rf      
2017 09  27.18828  00 11 30.144  +00 59 21.30  23.4i 13TM228   W84  C~52Rf      
2017 10  17.18782  00 10 00.128  +00 49 32.13  23.8r 13TM228   W84  C~52Rf      
2017 10  29.14809  00 09 12.253  +00 44 19.55  23.4i 13TM228   W84  C~52Rf      
2018 09  17.29376  00 17 50.368  +01 38 34.57  23.5i 13TM228   W84  C~52Rf      
2018 09  17.29928  00 17 50.353  +01 38 34.59  23.1i 13TM228   W84  C~52Rf      

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    -0.05       0.00     0.19
     2   0.0410   -937.40     0.08      -3.18    -0.01
     3   0.1123  -1996.39    -0.05      -7.03    -0.12
     4   1.0216   4886.70     0.10    -109.74     0.15
     5   2.0670   9333.40    -0.09    -220.51    -0.35
     6   2.9134  18626.21    -0.01    -318.09    -0.02
     7   2.9433  17802.73     0.02    -321.37     0.10
     8   2.9708  17036.55    -0.01    -323.89     0.01
     9   3.1458  13788.02    -0.05    -328.63    -0.14
    10   3.9565  22890.31     0.06    -432.33     0.04
    11   3.9565  22890.01    -0.13    -432.28     0.08
    12   4.0112  21400.00     0.12    -435.88     0.07
    13   4.0440  20608.74     0.04    -437.01    -0.04
    14   4.9287  29156.11    -0.13    -539.97    -0.04
    15   4.9287  29155.91     0.10    -539.87     0.07

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.

13TM228    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.009    43.034    42.984
ecceobj         0.071     0.072     0.071
incobj          1.147     1.147     1.147
qmin           38.612    38.604    38.566
qmax           47.334    47.274    47.246
amean          42.817    42.842    42.793
amin           42.474    42.502    42.453
amax           43.192    43.207    43.161
emean           0.074     0.075     0.074
emin            0.050     0.049     0.049
emax            0.096     0.095     0.095
imean           2.938     2.931     2.944
imin            1.490     1.490     1.490
imax            4.025     4.001     4.038
excite_mean     0.091     0.091     0.090
fracstop        1.000     1.000     1.000
cjmean          3.077     3.078     3.077

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       183.4     183.9     183.3
kozaiamp        180.0     180.0     180.0