Orbit Fit and Astrometric record for 11XJ4

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: 11XJ4     
# Created Tue Jan 23 02:37:46 2018
# Orbit generated from Bernstein formalism
# Fitting   35 observations of   35
# Arc:  10.98y
# First observation: 2003/03/31
#  Last observation: 2014/03/24
Preliminary a, adot, b, bdot, g, gdot:
  -0.003487   0.032399   0.000847  -0.006400   0.024293   0.000000
# Chi-squared of fit:    25.67 DOF:   64 RMS:  0.15
# Min/Max residuals:    -0.33    0.36
# Exact a, adot, b, bdot, g, gdot:
  1.729876E-05  3.060678E-02 -3.471663E-06 -6.057043E-03  2.767886E-02 -1.402553E-03
# Covariance matrix:
  7.2822E-13 -1.4543E-13 -2.1841E-14  1.6289E-14 -5.7323E-14 -2.2469E-13
 -1.4543E-13  7.1694E-14  1.7228E-14 -1.2670E-14  1.5839E-14  1.7438E-13
 -2.1841E-14  1.7228E-14  6.2033E-13 -6.6182E-14  3.6970E-15  4.6279E-14
  1.6289E-14 -1.2670E-14 -6.6182E-14  9.3088E-15 -3.8775E-15 -3.4117E-14
 -5.7323E-14  1.5839E-14  3.6970E-15 -3.8775E-15  1.9381E-13  5.5964E-14
 -2.2469E-13  1.7438E-13  4.6279E-14 -3.4117E-14  5.5964E-14  4.6973E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.014525  154.277692   -0.586013    0.000203   -0.807513  2452729.652171
# Heliocentric elements and errors
Epoch:              2452720.5000  =  2003/03/22
Mean Anomaly:          353.56858 +/-     0.005
Argument of Peri:      189.68314 +/-     0.008
Long of Asc Node:      335.25385 +/-     0.000
Inclination:            11.15929 +/-     0.000
Eccentricity:         0.19863927 +/-    0.0001
Semi-Major Axis:     45.99166863 +/-    0.0040
Time of Perihelion: 2454755.7665 +/-       1.7
Perihelion:          36.85591718 +/-    0.0041
Aphelion:            55.12742009 +/-    0.0054
Period (y)              311.9083 +/-      0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -33.53266319 +/-    0.0005
Ecliptic Y           15.50654491 +/-    0.0002
Ecliptic Z            0.00904840 +/-    0.0000
Ecliptic XDOT        -0.00119547 +/-    0.0000
Ecliptic YDOT        -0.00279237 +/-    0.0000
Ecliptic ZDOT        -0.00059898 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   36.94445178 +/-    0.0005
Geocenter to KBO     36.12865675 +/-    0.0006
# Hcoef:  7.04

The following table shows the complete astrometric record for 11XJ4. 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 (11XJ4) followed by the observatory code and reference code for the source of the astrometry.

2003 03  31.151428 10 24 38.45   +09 57 17.4         11XJ4     645  C~2POS      
2003 03  31.152257 10 24 38.44   +09 57 17.4         11XJ4     645  C~2POS      
2011 03  10.41233  11 14 46.596  +01 52 50.32  22.4r 11XJ4     F51  C~1w3o      
2011 03  30.36437  11 13 07.300  +02 02 25.87  22.9w 11XJ4     F51  C~1w3o      
2011 03  30.37765  11 13 07.237  +02 02 26.19  23.3w 11XJ4     F51  C~1w3o      
2011 03  30.39210  11 13 07.166  +02 02 26.59  22.9w 11XJ4     F51  C~1w3o      
2011 03  30.40537  11 13 07.109  +02 02 27.10  23.1w 11XJ4     F51  C~1w3o      
2011 12  06.62930  11 24 51.877  +00 37 47.28  23.6w 11XJ4     F51  C~1w3o      
2011 12  06.63395  11 24 51.877  +00 37 47.36  23.3w 11XJ4     F51  C~1w3o      
2011 12  06.63860  11 24 51.884  +00 37 47.31  23.3w 11XJ4     F51  C~1w3o      
2011 12  06.64324  11 24 51.889  +00 37 47.17  23.7w 11XJ4     F51  C~1w3o      
2012 03  20.36416  11 19 51.555  +00 57 43.88  23.1w 11XJ4     F51  C~1w3o      
2012 03  20.37878  11 19 51.490  +00 57 44.72  22.8w 11XJ4     F51  C~1w3o      
2012 11  25.61703  11 30 16.718  -00 16 38.94  22.2w 11XJ4     F51  C~1w3o      
2013 02  19.240486 11 28 17.97   -00 16 11.8   22.9r 11XJ4     309  C~2HOb      
2013 02  19.245173 11 28 17.95   -00 16 11.7   23.0r 11XJ4     309  C~2HOb      
2013 02  19.249838 11 28 17.92   -00 16 11.5   22.9r 11XJ4     309  C~2HOb      
2013 02  19.259201 11 28 17.88   -00 16 11.3   23.0r 11XJ4     309  C~2HOb      
2013 03  06.41366  11 27 03.141  -00 09 29.90  22.6w 11XJ4     F51  C~1w3o      
2013 03  06.42827  11 27 03.034  -00 09 29.27  22.6w 11XJ4     F51  C~1w3o      
2013 03  06.44290  11 27 02.964  -00 09 28.82  22.4w 11XJ4     F51  C~1w3o      
2013 03  06.45752  11 27 02.906  -00 09 28.78  22.3w 11XJ4     F51  C~1w3o      
2013 04  05.33113  11 24 35.021  +00 05 00.36  22.2w 11XJ4     F51  C~1w3o      
2013 04  05.34550  11 24 34.984  +00 05 00.75  22.3w 11XJ4     F51  C~1w3o      
2013 04  05.35659  11 24 34.931  +00 05 01.16  22.4w 11XJ4     F51  C~1w3o      
2013 04  05.35988  11 24 34.896  +00 05 01.32  22.4w 11XJ4     F51  C~1w3o      
2013 04  05.37100  11 24 34.848  +00 05 01.67  22.2w 11XJ4     F51  C~1w3o      
2014 02  28.45388  11 33 33.327  -01 12 36.70  22.7w 11XJ4     F51  C~1w3o      
2014 02  28.46595  11 33 33.277  -01 12 36.46  22.6w 11XJ4     F51  C~1w3o      
2014 02  28.47802  11 33 33.202  -01 12 36.10  22.6w 11XJ4     F51  C~1w3o      
2014 02  28.49011  11 33 33.145  -01 12 35.91  22.5w 11XJ4     F51  C~1w3o      
2014 03  24.40194  11 31 32.284  -01 01 09.37  22.4w 11XJ4     F51  C~1w3o      
2014 03  24.41424  11 31 32.206  -01 01 08.93  22.5w 11XJ4     F51  C~1w3o      
2014 03  24.42652  11 31 32.153  -01 01 08.45  22.3w 11XJ4     F51  C~1w3o      
2014 03  24.43884  11 31 32.064  -01 01 08.15  22.7w 11XJ4     F51  C~1w3o      

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     0.04       0.00     0.00
  2   0.0000     -0.14    -0.05      -0.05    -0.05
  3   7.9432  53696.52     0.04  -10258.82    -0.19
  4   7.9978  51994.69     0.00  -10291.26     0.01
  5   7.9979  51993.63     0.04  -10291.32    -0.03
  6   7.9979  51992.42     0.01  -10291.36    -0.05
  7   7.9980  51991.37     0.05  -10291.20     0.13
  8   8.6858  64659.98     0.12  -11016.18    -0.12
  9   8.6858  64659.95    -0.06  -11016.10    -0.00
 10   8.6858  64660.08    -0.07  -11016.11     0.04
 11   8.6858  64660.21    -0.08  -11016.21    -0.03
 12   8.9725  59622.05    -0.21  -11641.50    -0.10
 13   8.9726  59620.72    -0.24  -11641.07     0.36
 14   9.6577  71059.30     0.36  -12263.20    -0.18
 15   9.8921  69218.65     0.06  -12948.01     0.08
 16   9.8921  69218.30     0.11  -12948.03     0.08
 17   9.8921  69217.75    -0.05  -12948.01     0.12
 18   9.8922  69217.05     0.04  -12948.05     0.13
 19   9.9336  67894.90     0.24  -13000.94     0.10
 20   9.9337  67892.99    -0.33  -13000.96     0.13
 21   9.9337  67891.72    -0.26  -13000.94     0.20
 22   9.9338  67890.82     0.18  -13001.24    -0.06
 23  10.0156  65256.73    -0.13  -13032.29    -0.16
 24  10.0156  65256.00     0.32  -13032.13     0.01
 25  10.0156  65255.01     0.26  -13032.04     0.09
 26  10.0156  65254.41    -0.07  -13032.09     0.04
 27  10.0157  65253.53    -0.04  -13032.04     0.10
 28  10.9166  75614.73    -0.20  -14398.63    -0.11
 29  10.9167  75613.84     0.01  -14398.69    -0.12
 30  10.9167  75612.50    -0.23  -14398.78    -0.17
 31  10.9167  75611.53    -0.11  -14398.94    -0.27
 32  10.9822  73417.81     0.32  -14442.88    -0.01
 33  10.9822  73416.40     0.05  -14442.91    -0.03
 34  10.9823  73415.36     0.14  -14442.75     0.14
 35  10.9823  73413.85    -0.24  -14442.99    -0.08

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.

11XJ4    quality flag:2

Type:       SCATNEAR  SCATEXTD  SCATEXTD

axisobj        45.501    45.512    45.489
ecceobj         0.190     0.190     0.190
incobj         11.202    11.202    11.202
qmin           35.957    35.843    35.863
qmax           55.988    56.002    55.727
amean          45.648    45.695    45.647
amin           45.226    45.289    45.222
amax           46.157    46.178    46.124
emean           0.196     0.197     0.195
emin            0.181     0.182     0.180
emax            0.213     0.214     0.210
imean          11.828    11.830    11.840
imin           11.029    11.016    11.031
imax           12.520    12.532    12.527
excite_mean     0.284     0.284     0.283
fracstop        1.000     1.000     1.000
cjmean          3.022     3.022     3.022

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       181.5     181.3     180.7
kozaiamp        179.9     180.0     180.0