Orbit Fit and Astrometric record for 13AX158

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: 13AX158   
# Created Fri Nov  1 01:09:10 2024
# Orbit generated from Bernstein formalism
# Fitting     14 observations of     14
# Arc:   3.00d
# First observation: 2013/01/04
#  Last observation: 2013/01/07
Preliminary a, adot, b, bdot, g, gdot:
   0.000000   0.444043   0.000001  -0.029231   0.153684   0.000000
# WARNING MRQMIN stopped after  13 iterations -- oscilliatory solution
# WARNING Fitting with energy constraint
# WARNING MRQMIN stopped after  13 iterations -- oscilliatory solution
# WARNING MRQMIN stopped after  13 iterations -- oscilliatory solution
# Chi-squared of fit:     2.41 DOF:     23 RMS:  0.07
# Min/Max residuals:    -0.11    0.10
# Exact a, adot, b, bdot, g, gdot:
  4.503609E-05  4.343449E-01 -2.600309E-06 -2.980497E-02  1.520207E-01  1.463172E-01
# Covariance matrix:
  1.8355E-11  1.7900E-07  2.5963E-12  1.1910E-08  2.9363E-08  2.6518E-07
  1.7900E-07  1.7869E-03  2.5717E-08  1.1899E-04  2.9289E-04  2.3966E-03
  2.5963E-12  2.5717E-08  6.7825E-13  1.6626E-09  4.2181E-09  3.8924E-08
  1.1910E-08  1.1899E-04  1.6626E-09  7.9365E-06  1.9502E-05  1.5677E-04
  2.9363E-08  2.9289E-04  4.2181E-09  1.9502E-05  4.8008E-05  3.9668E-04
  2.6518E-07  2.3966E-03  3.8924E-08  1.5677E-04  3.9668E-04  8.8872E-03
#      lat0       lon0       xBary       yBary       zBary        JD0
  -13.229327  121.775762    0.299568   -0.213739   -0.909621  2456296.780758
# Heliocentric elements and errors
Epoch:              2456290.5000  =  2012/12/29
Mean Anomaly:            3.52339 +/-     5.466
Argument of Peri:      209.77578 +/-    16.877
Long of Asc Node:      232.45868 +/-     2.604
Inclination:            12.55539 +/-     0.293
Eccentricity:         0.75987371 +/-    0.2739
Semi-Major Axis:     28.41356379 +/-   28.8817
Time of Perihelion: 2455749.0669 +/-     155.0
Perihelion:           6.82284376 +/-   10.4235
Aphelion:            50.00428382 +/-   51.4203
Period (y)              151.4596 +/-    230.93
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           -3.60841683 +/-    0.1537
Ecliptic Y            6.39809611 +/-    0.2481
Ecliptic Z           -1.50545510 +/-    0.0686
Ecliptic XDOT        -0.00794226 +/-    0.0011
Ecliptic YDOT        -0.00204169 +/-    0.0012
Ecliptic ZDOT        -0.00112545 +/-    0.0003
# Distances at JD0 (AU)
Heliocenter to KBO    7.49817984 +/-    0.2247
Geocenter to KBO      6.57805165 +/-    0.2998
# Hcoef: 14.37

The following table shows the complete astrometric record for 13AX158. 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 (13AX158) followed by the observatory code and reference code for the source of the astrometry.

2013 01  04.27998  08 04 20.31   +06 50 49.0   23.1r 13AX158   W84  C~0sQM      
2013 01  04.29034  08 04 20.11   +06 50 49.1   23.0r 13AX158   W84  C~0sQM      
2013 01  04.30079  08 04 19.91   +06 50 49.2   23.5r 13AX158   W84  C~0sQM      
2013 01  05.25672  08 04 01.75   +06 50 54.5   22.9r 13AX158   W84  C~0sQM      
2013 01  05.26720  08 04 01.54   +06 50 54.5   22.7r 13AX158   W84  C~0sQM      
2013 01  05.27756  08 04 01.34   +06 50 54.6   22.7r 13AX158   W84  C~0sQM      
2013 01  05.28817  08 04 01.13   +06 50 54.7   23.0r 13AX158   W84  C~0sQM      
2013 01  06.27283  08 03 42.25   +06 51 02.6   22.9r 13AX158   W84  C~0sQM      
2013 01  06.28339  08 03 42.04   +06 51 02.6   23.0r 13AX158   W84  C~0sQM      
2013 01  06.30427  08 03 41.62   +06 51 02.8   23.1r 13AX158   W84  C~0sQM      
2013 01  07.25164  08 03 23.33   +06 51 12.9   22.9r 13AX158   W84  C~0sQM      
2013 01  07.25771  08 03 23.21   +06 51 13.0   23.0r 13AX158   W84  C~0sQM      
2013 01  07.27239  08 03 22.92   +06 51 13.1   22.7r 13AX158   W84  C~0sQM      
2013 01  07.28289  08 03 22.71   +06 51 13.4   23.1r 13AX158   W84  C~0sQM      

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     0.03       0.00    -0.10
     2   0.0000     -2.93     0.03      -0.53    -0.04
     3   0.0001     -5.87     0.06      -1.06     0.02
     4   0.0027   -271.36     0.01     -52.92     0.09
     5   0.0027   -274.41    -0.05     -53.58     0.01
     6   0.0027   -277.35    -0.01     -54.11     0.05
     7   0.0028   -280.43    -0.05     -54.67     0.07
     8   0.0055   -556.96     0.02    -106.20     0.04
     9   0.0055   -560.01     0.01    -106.86    -0.06
    10   0.0055   -566.17    -0.11    -107.98    -0.07
    11   0.0081   -834.58     0.02    -155.46    -0.04
    12   0.0082   -836.35     0.02    -155.74    -0.01
    13   0.0082   -840.60     0.07    -156.55    -0.07
    14   0.0082   -843.72     0.01    -156.92     0.10

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.

13AX158    quality flag:0

Type:      ERR2LARGE ERR2LARGE ERR2LARGE

axisobj         0.000     0.000     0.000
ecceobj        -1.000    -1.000    -1.000
incobj         -1.000    -1.000    -1.000
qmin            0.000     0.000     0.000
qmax            0.000     0.000     0.000
amean           0.000     0.000     0.000
amin            0.000     0.000     0.000
amax            0.000     0.000     0.000
emean           0.000     0.000     0.000
emin            0.000     0.000     0.000
emax            0.000     0.000     0.000
imean           0.000     0.000     0.000
imin            0.000     0.000     0.000
imax            0.000     0.000     0.000
excite_mean     0.000     0.000     0.000
fracstop        0.000     0.000     0.000
cjmean          0.000     0.000     0.000

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         0.0       0.0       0.0
kozaiamp          0.0       0.0       0.0