Orbit Fit and Astrometric record for 12BA155

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: 12BA155   
# Created Sat Aug 18 01:37:57 2018
# Orbit generated from Bernstein formalism
# Fitting   20 observations of   20
# Arc:  12.19y
# First observation: 2001/12/15
#  Last observation: 2014/02/24
Preliminary a, adot, b, bdot, g, gdot:
  -0.004697   0.025143   0.000699  -0.000958   0.017712   0.000000
# Chi-squared of fit:    12.96 DOF:   34 RMS:  0.14
# Min/Max residuals:    -0.33    0.32
# Exact a, adot, b, bdot, g, gdot:
  1.559319E-05  2.244599E-02 -3.040314E-07 -7.438419E-04  2.286907E-02 -7.315297E-03
# Covariance matrix:
  7.0481E-13 -1.6209E-13  2.2667E-15  2.4054E-15 -1.8784E-13 -3.2431E-13
 -1.6209E-13  6.9325E-14  4.4662E-15 -2.4621E-15  2.9804E-14  1.9568E-13
  2.2667E-15  4.4662E-15  4.7184E-13 -4.3650E-14 -7.4911E-14  3.4841E-14
  2.4054E-15 -2.4621E-15 -4.3650E-14  4.7429E-15  1.4535E-14 -1.1772E-14
 -1.8784E-13  2.9804E-14 -7.4911E-14  1.4535E-14  9.8622E-13 -1.8035E-13
 -3.2431E-13  1.9568E-13  3.4841E-14 -1.1772E-14 -1.8035E-13  6.6481E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
  -14.449610  131.039615    0.721035   -0.165165   -0.640601  2452258.952964
# Heliocentric elements and errors
Epoch:              2452250.5000  =  2001/12/07
Mean Anomaly:          320.79209 +/-     0.015
Argument of Peri:      340.11782 +/-     0.020
Long of Asc Node:      228.30771 +/-     0.001
Inclination:            14.37566 +/-     0.000
Eccentricity:         0.37576064 +/-    0.0001
Semi-Major Axis:     55.67770112 +/-    0.0127
Time of Perihelion: 2468777.4076 +/-       2.5
Perihelion:          34.75621269 +/-    0.0088
Aphelion:            76.59918955 +/-    0.0179
Period (y)              415.4609 +/-      0.14
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -27.69158892 +/-    0.0012
Ecliptic Y           32.91573388 +/-    0.0014
Ecliptic Z          -10.91118222 +/-    0.0005
Ecliptic XDOT        -0.00146400 +/-    0.0000
Ecliptic YDOT        -0.00242088 +/-    0.0000
Ecliptic ZDOT         0.00013251 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   44.37706087 +/-    0.0013
Geocenter to KBO     43.72718413 +/-    0.0019
# Hcoef:  6.13

The following table shows the complete astrometric record for 12BA155. 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 (12BA155) followed by the observatory code and reference code for the source of the astrometry.

2001 12  15.452221 08 38 16.81   +03 31 53.4         12BA155   645  C~2VVH      
2001 12  15.453050 08 38 16.81   +03 31 53.4         12BA155   645  C~2VVH      
2006 11  18.437195 09 04 34.93   +01 38 51.9   22.3V 12BA155   645  C~2VVH      
2006 11  18.438024 09 04 34.95   +01 38 52.0   21.8V 12BA155   645  C~2VVH      
2006 11  18.440512 09 04 34.93   +01 38 51.9   23.6V 12BA155   645  C~2VVH      
2012 01  25.41375  09 28 56.882  -00 34 07.16  22.4w 12BA155   F51  C~1w3p      
2012 01  25.42802  09 28 56.821  -00 34 06.81  22.3w 12BA155   F51  C~1w3p      
2012 01  25.44233  09 28 56.756  -00 34 06.56  22.5w 12BA155   F51  C~1w3p      
2012 01  25.45668  09 28 56.690  -00 34 06.46  22.4w 12BA155   F51  C~1w3p      
2012 02  12.47603  09 27 32.470  -00 28 09.87  21.5i 12BA155   F51  C~1w3p      
2012 02  12.48862  09 27 32.414  -00 28 09.57  21.9i 12BA155   F51  C~1w3p      
2014 01  11.48746  09 41 34.724  -01 31 41.60  21.5i 12BA155   F51  C~1w3p      
2014 01  31.46944  09 40 08.543  -01 27 25.38  22.3w 12BA155   F51  C~1w3p      
2014 01  31.48240  09 40 08.495  -01 27 25.04  21.9w 12BA155   F51  C~1w3p      
2014 01  31.49536  09 40 08.424  -01 27 24.47  22.2w 12BA155   F51  C~1w3p      
2014 01  31.50830  09 40 08.354  -01 27 24.39  22.1w 12BA155   F51  C~1w3p      
2014 02  24.34699  09 38 15.951  -01 17 56.61  21.9w 12BA155   F51  C~1w3p      
2014 02  24.35854  09 38 15.901  -01 17 56.29  21.8w 12BA155   F51  C~1w3p      
2014 02  24.37010  09 38 15.842  -01 17 55.92  22.1w 12BA155   F51  C~1w3p      
2014 02  24.38168  09 38 15.789  -01 17 55.70  21.9w 12BA155   F51  C~1w3p      

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    -0.02       0.00    -0.04
  2   0.0000      0.00     0.02       0.00    -0.03
  3   4.9254  24715.36    -0.10    -287.40    -0.10
  4   4.9254  24715.63     0.17    -287.22     0.09
  5   4.9254  24715.36    -0.10    -287.40    -0.03
  6  10.1108  48739.30     0.05   -2158.76    -0.08
  7  10.1108  48738.27     0.09   -2158.66     0.07
  8  10.1109  48737.20     0.09   -2158.68     0.10
  9  10.1109  48736.17     0.13   -2158.85    -0.02
 10  10.1602  47352.27    -0.19   -2151.01     0.23
 11  10.1603  47351.34    -0.12   -2150.95     0.25
 12  12.0740  61466.02     0.32   -2483.57    -0.06
 13  12.1287  60038.29    -0.17   -2582.57    -0.19
 14  12.1288  60037.44     0.01   -2582.43    -0.03
 15  12.1288  60036.16    -0.24   -2582.15     0.26
 16  12.1288  60035.04    -0.33   -2582.36     0.06
 17  12.1941  58113.15     0.07   -2477.22    -0.11
 18  12.1941  58112.27     0.14   -2477.10    -0.10
 19  12.1942  58111.25     0.06   -2476.97    -0.08
 20  12.1942  58110.36     0.11   -2476.97    -0.18

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.

12BA155    quality flag:3

Type:         5:2EEE    5:2EEE    5:2EEE

axisobj        55.208    55.244    55.171
ecceobj         0.372     0.372     0.372
incobj         14.374    14.374    14.374
qmin           33.971    34.024    33.804
qmax           78.609    78.476    78.656
amean          55.463    55.463    55.463
amin           54.602    54.564    54.594
amax           56.584    56.548    56.522
emean           0.376     0.371     0.377
emin            0.364     0.349     0.364
emax            0.389     0.389     0.392
imean          15.374    15.746    15.234
imin           14.958    15.050    14.865
imax           15.685    16.797    15.634
excite_mean     0.460     0.459     0.460
fracstop        1.000     1.000     1.000
cjmean          2.968     2.969     2.968

libcent 0       181.1     178.5     180.1
libamp  0       154.2     175.9     157.6
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       154.7     159.0     160.2
kozaiamp        180.0     180.0     179.9