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 Sat Dec  4 02:11:24 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     22 observations of     22
# Arc:  10.05y
# First observation: 2011/01/30
#  Last observation: 2021/02/16
# Chi-squared of fit:    16.56 DOF:     38 RMS:  0.15
# Min/Max residuals:    -0.23    0.58
# Exact a, adot, b, bdot, g, gdot:
  1.775050E-05  2.973907E-02  3.151864E-06  6.256115E-03  2.714462E-02  1.021294E-03
# Covariance matrix:
  2.7118E-13 -1.2361E-13  2.4829E-14 -2.2377E-14  7.3251E-14 -3.3757E-13
 -1.2361E-13  1.3583E-13 -3.0375E-14  2.7747E-14  1.4375E-13  4.1890E-13
  2.4829E-14 -3.0375E-14  1.3523E-13 -2.5401E-14 -3.2604E-14 -9.8045E-14
 -2.2377E-14  2.7747E-14 -2.5401E-14  1.1983E-14  3.0762E-14  8.9564E-14
  7.3251E-14  1.4375E-13 -3.2604E-14  3.0762E-14  7.7043E-13  4.6528E-13
 -3.3757E-13  4.1890E-13 -9.8045E-14  8.9564E-14  4.6528E-13  1.3522E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
   -3.215669  162.785281    0.532553   -0.046693   -0.831113  2455591.928956
# Heliocentric elements and errors
Epoch:              2455592.5000  =  2011/01/31
Mean Anomaly:            4.90331 +/-     0.009
Argument of Peri:      337.62360 +/-     0.014
Long of Asc Node:      176.62191 +/-     0.000
Inclination:            12.25691 +/-     0.000
Eccentricity:         0.19440893 +/-    0.0001
Semi-Major Axis:     46.69790122 +/-    0.0075
Time of Perihelion: 2454004.9355 +/-       3.0
Perihelion:          37.61941232 +/-    0.0077
Aphelion:            55.77639012 +/-    0.0102
Period (y)              319.1202 +/-      0.08
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -35.76754601 +/-    0.0011
Ecliptic Y           11.63957452 +/-    0.0004
Ecliptic Z           -2.06640814 +/-    0.0001
Ecliptic XDOT        -0.00102085 +/-    0.0000
Ecliptic YDOT        -0.00281816 +/-    0.0000
Ecliptic ZDOT         0.00062424 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   37.67049320 +/-    0.0011
Geocenter to KBO     36.83971256 +/-    0.0012
# Hcoef:  6.88

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      
2019 02  08.440160 11 45 22.204  +01 14 40.79  22.6G 12BV154   G37  C~2zmc      
2019 02  08.505110 11 45 22.016  +01 14 42.65        12BV154   G37  C~2zmc      
2021 02  16.572734 11 58 10.373  +00 39 13.91  22.8w 12BV154   F51  C~4Z5E      
2021 02  16.585044 11 58 10.315  +00 39 14.09  22.6w 12BV154   F51  C~4Z5E      
2021 02  16.609667 11 58 10.224  +00 39 14.73  22.7w 12BV154   F51  C~4Z5E      

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     0.13
     2   0.0000      0.00     0.25       0.00     0.26
     3   0.0001      0.00    -0.13       0.00    -0.06
     4   0.9693      0.00    -0.04       0.00     0.19
     5   0.9694      0.00    -0.08       0.00    -0.12
     6   0.9694      0.00     0.08       0.00    -0.12
     7   0.9695      0.00     0.04       0.00    -0.10
     8   1.1332      0.00     0.00       0.00    -0.04
     9   1.1333      0.00     0.08       0.00     0.13
    10   1.1333      0.00     0.23       0.00     0.03
    11   1.1333      0.00    -0.09       0.00     0.14
    12   2.0946      0.00     0.07       0.00    -0.05
    13   3.0800      0.00    -0.23       0.00    -0.19
    14   3.0800      0.00    -0.04       0.00    -0.01
    15   3.0801      0.00    -0.20       0.00    -0.11
    16   3.0801      0.00    -0.01       0.00    -0.11
    17   3.0940      0.00    -0.09       0.00    -0.18
    18   8.0247      0.00    -0.17       0.00     0.00
    19   8.0249      0.00     0.58       0.00     0.12
    20  10.0483      0.00    -0.00       0.00     0.18
    21  10.0483      0.00    -0.14       0.00    -0.01
    22  10.0484      0.00    -0.04       0.00    -0.09

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        46.810    46.810    46.810
ecceobj         0.196     0.196     0.196
incobj         12.258    12.258    12.258
qmin           36.825    36.811    36.859
qmax           57.449    57.534    57.464
amean          46.925    46.924    46.924
amin           46.505    46.505    46.511
amax           47.430    47.438    47.415
emean           0.198     0.198     0.198
emin            0.185     0.185     0.185
emax            0.213     0.213     0.213
imean          11.941    11.941    11.941
imin           11.335    11.336    11.335
imax           12.543    12.546    12.546
excite_mean     0.287     0.287     0.287
fracstop        1.000     1.000     1.000
cjmean          3.035     3.035     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       172.3     172.4     172.4
kozaiamp        180.0     180.0     180.0