Orbit Fit and Astrometric record for 12BV154

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: 12BV154   
# Created Tue Oct 24 01:37:58 2017
# Orbit generated from Bernstein formalism
# Fitting   17 observations of   17
# Arc:   3.09y
# First observation: 2011/01/30
#  Last observation: 2014/03/05
Preliminary a, adot, b, bdot, g, gdot:
  -0.000127   0.029852  -0.000020   0.006281   0.027046   0.000000
# Chi-squared of fit:     6.25 DOF:   28 RMS:  0.11
# Min/Max residuals:    -0.21    0.24
# Exact a, adot, b, bdot, g, gdot:
  1.762536E-05  2.973943E-02  3.628041E-06  6.255826E-03  2.714473E-02  1.026693E-03
# Covariance matrix:
  4.5657E-13 -5.8078E-13  5.1469E-14 -1.0879E-13 -1.9723E-13 -5.1350E-12
 -5.8078E-13  1.2750E-12 -1.2589E-13  2.6578E-13  8.0356E-13  1.2508E-11
  5.1469E-14 -1.2589E-13  2.6004E-13 -1.3307E-13 -7.4033E-14 -1.3218E-12
 -1.0879E-13  2.6578E-13 -1.3307E-13  1.2793E-13  1.5559E-13  2.7918E-12
 -1.9723E-13  8.0356E-13 -7.4033E-14  1.5559E-13  1.1813E-12  7.2404E-12
 -5.1350E-12  1.2508E-11 -1.3218E-12  2.7918E-12  7.2404E-12  1.3152E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -3.215669  162.785281    0.532554   -0.046693   -0.831113  2455591.928956
# Heliocentric elements and errors
Epoch:              2455590.5000  =  2011/01/29
Mean Anomaly:            4.93734 +/-     0.086
Argument of Peri:      337.56154 +/-     0.131
Long of Asc Node:      176.62266 +/-     0.001
Inclination:            12.25621 +/-     0.000
Eccentricity:         0.19445165 +/-    0.0001
Semi-Major Axis:     46.69913843 +/-    0.0078
Time of Perihelion: 2453991.8541 +/-      27.8
Perihelion:          37.61841395 +/-    0.0088
Aphelion:            55.77986291 +/-    0.0111
Period (y)              319.1328 +/-      0.08
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -35.76741197 +/-    0.0014
Ecliptic Y           11.63953782 +/-    0.0004
Ecliptic Z           -2.06638277 +/-    0.0001
Ecliptic XDOT        -0.00102137 +/-    0.0000
Ecliptic YDOT        -0.00281802 +/-    0.0000
Ecliptic ZDOT         0.00062418 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   37.67036684 +/-    0.0013
Geocenter to KBO     36.83956897 +/-    0.0015
# Hcoef:  7.04

The following table shows the complete astrometric record for 12BV154. 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 (12BV154) followed by the observatory code and reference code for the source of the astrometry.

2011 01  30.42819  10 51 35.715  +03 47 18.35  23.1w 12BV154   F51  C~1w3p      
2011 01  30.44425  10 51 35.669  +03 47 18.89  23.4w 12BV154   F51  C~1w3p      
2011 01  30.45901  10 51 35.583  +03 47 18.94  23.4w 12BV154   F51  C~1w3p      
2012 01  19.47799  10 59 05.876  +03 24 04.21  23.3w 12BV154   F51  C~1w3p      
2012 01  19.49198  10 59 05.828  +03 24 04.17  23.0w 12BV154   F51  C~1w3p      
2012 01  19.50606  10 59 05.794  +03 24 04.45  22.9w 12BV154   F51  C~1w3p      
2012 01  19.52011  10 59 05.746  +03 24 04.74  23.2w 12BV154   F51  C~1w3p      
2012 03  19.34091  10 54 40.913  +03 53 58.00  23.1w 12BV154   F51  C~1w3p      
2012 03  19.35485  10 54 40.852  +03 53 58.64  22.7w 12BV154   F51  C~1w3p      
2012 03  19.36881  10 54 40.796  +03 53 59.02  22.8w 12BV154   F51  C~1w3p      
2012 03  19.38278  10 54 40.709  +03 53 59.60  22.7w 12BV154   F51  C~1w3p      
2013 03  05.46301  11 02 41.046  +03 26 36.31  22.4w 12BV154   F51  C~1w3p      
2014 02  28.40208  11 09 58.526  +03 04 05.03  22.7w 12BV154   F51  C~1w3p      
2014 02  28.41444  11 09 58.478  +03 04 05.63  22.7w 12BV154   F51  C~1w3p      
2014 02  28.42697  11 09 58.406  +03 04 05.95  22.4w 12BV154   F51  C~1w3p      
2014 02  28.43936  11 09 58.358  +03 04 06.37  22.3w 12BV154   F51  C~1w3p      
2014 03  05.51726  11 09 33.778  +03 06 59.14  22.4w 12BV154   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    -0.06       0.00     0.00
  2   0.0000     -0.84     0.16       0.24     0.24
  3   0.0001     -2.05    -0.07      -0.21    -0.21
  4   0.9693   6763.45    -0.13    1284.62     0.13
  5   0.9694   6762.80    -0.05    1284.31    -0.18
  6   0.9694   6762.22     0.10    1284.37    -0.11
  7   0.9695   6761.44     0.06    1284.36    -0.11
  8   1.1332   2410.23    -0.02    1426.15    -0.06
  9   1.1333   2409.14    -0.01    1426.40     0.12
 10   1.1333   2408.22     0.16    1426.43     0.09
 11   1.1333   2406.80    -0.17    1426.47     0.07
 12   2.0946   9686.19     0.05    2661.34     0.04
 13   3.0800  16281.87    -0.08    3938.81    -0.12
 14   3.0800  16280.97     0.02    3939.09     0.13
 15   3.0801  16279.85    -0.09    3938.96    -0.03
 16   3.0801  16279.01     0.09    3939.08     0.05
 17   3.0940  15870.18     0.04    3956.46    -0.05

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.

12BV154    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        46.811    46.835    46.788
ecceobj         0.196     0.196     0.195
incobj         12.257    12.257    12.257
qmin           36.845    36.855    36.852
qmax           57.542    57.572    57.510
amean          46.925    46.948    46.907
amin           46.517    46.533    46.493
amax           47.435    47.448    47.422
emean           0.198     0.199     0.198
emin            0.184     0.186     0.185
emax            0.213     0.214     0.213
imean          11.940    11.937    11.943
imin           11.331    11.326    11.341
imax           12.540    12.531    12.546
excite_mean     0.287     0.287     0.286
fracstop        1.000     1.000     1.000
cjmean          3.035     3.036     3.035

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       172.5     172.4     172.3
kozaiamp        180.0     179.9     180.0