Orbit Fit and Astrometric record for 10BL4

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: 10BL4     
# Created Wed Oct 18 01:37:48 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   27 observations of   28
# Arc:   5.26y
# First observation: 2010/01/18
#  Last observation: 2015/04/22
# Chi-squared of fit:    41.89 DOF:   48 RMS:  0.22
# Min/Max residuals:    -0.49    0.53
# Exact a, adot, b, bdot, g, gdot:
  4.429471E-05  3.430846E-01 -2.991240E-06 -1.564677E-02  1.297178E-01  2.614867E-02
# Covariance matrix:
  1.4689E-13 -8.4264E-14 -5.4333E-15  9.3951E-16  8.3411E-14 -3.3396E-14
 -8.4264E-14  2.9430E-13  2.2206E-15 -2.3665E-14  1.0608E-13  5.8095E-14
 -5.4333E-15  2.2206E-15  9.0440E-14 -1.8879E-14 -1.1722E-14  2.8056E-15
  9.3951E-16 -2.3665E-14 -1.8879E-14  1.0743E-14 -2.0090E-14 -2.6844E-15
  8.3411E-14  1.0608E-13 -1.1722E-14 -2.0090E-14  3.1312E-13 -2.9830E-14
 -3.3396E-14  5.8095E-14  2.8056E-15 -2.6844E-15 -2.9830E-14  2.1444E-14
#      lat0       lon0       xBary       yBary       zBary        JD0
  -23.092252  129.182305    0.194689   -0.379926   -0.891181  2455214.566736
# Heliocentric elements and errors
Epoch:              2455214.5000  =  2010/01/18
Mean Anomaly:            2.16226 +/-     0.050
Argument of Peri:      252.85406 +/-     0.000
Long of Asc Node:      227.05765 +/-     0.000
Inclination:            20.81690 +/-     0.000
Eccentricity:         0.53651115 +/-    0.0005
Semi-Major Axis:     18.49820600 +/-    0.0000
Time of Perihelion: 2455039.9590 +/-       4.0
Perihelion:           8.57371222 +/-    0.0097
Aphelion:            28.42269977 +/-    0.0097
Period (y)               79.5614 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           -4.93786579 +/-    0.0000
Ecliptic Y            6.36768247 +/-    0.0001
Ecliptic Z           -3.02365962 +/-    0.0000
Ecliptic XDOT        -0.00584903 +/-    0.0000
Ecliptic YDOT        -0.00427619 +/-    0.0000
Ecliptic ZDOT        -0.00052031 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO    8.60651694 +/-    0.0001
Geocenter to KBO      7.70903994 +/-    0.0001
# Hcoef: 12.03

The following table shows the complete astrometric record for 10BL4. 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 (10BL4) followed by the observatory code and reference code for the source of the astrometry.

2010 01  18.06597  08 22 36.520  -04 22 16.89  21.0R 10BL4     809  C~0DYC      
2010 01  18.15020  08 22 35.004  -04 22 14.95  20.9R 10BL4     809  C~0DYC      
2010 01  18.23414  08 22 33.462  -04 22 13.36  21.0R 10BL4     809  C~0DYC      
2010 01  20.25673  08 21 57.16   -04 21 20.3         10BL4     807  C~0DYC      
2010 01  21.19525  08 21 40.25   -04 20 51.40  20.8R 10BL4     807  C~0DYC      
2010 01  21.22139  08 21 39.75   -04 20 50.30  21.2R 10BL4     807  C~0DYC      
2010 01  21.25447  08 21 39.16   -04 20 49.15        10BL4     807  C~0DYC      
2010 02  14.21441  08 14 45.09   -03 52 54.77        10BL4     807  C~0Dxq      
2010 02  14.25966  08 14 44.37   -03 52 50.37        10BL4     807  C~0Dxq      
2010 03  22.05325  08 09 00.065  -02 37 31.21  21.5R 10BL4     807  C~0Fnl      
2010 03  22.10609  08 08 59.947  -02 37 24.01  21.2R 10BL4     807  C~0Fnl      
2010 04  20.18850  08 10 56.40   -01 37 59.3   21.1R 10BL4     688  C~0GWt      
2010 04  20.20755  08 10 56.59   -01 37 57.6         10BL4     688  C~0GWt      
2011 01  10.45020  09 37 38.36   -09 41 57.0   21.1R 10BL4     695  C~0Ut9      
2011 01  10.45873  09 37 38.24   -09 41 57.1         10BL4     695  C~0Ut9      
2011 01  10.50754  09 37 37.61   -09 41 58.8         10BL4     695  C~0Ut9      
2011 03  10.15660  09 22 23.30   -08 33 01.7   21.2R 10BL4     688  C~0Ut9      
2011 03  10.21716  09 22 22.51   -08 32 53.1         10BL4     688  C~0Ut9      
2012 03  29.22081  10 25 55.19   -12 06 36.9   21.7R 10BL4     688  C~0fFC      
2012 03  29.27067  10 25 54.61   -12 06 28.6         10BL4     688  C~0fFC      
2015 04  19.11769  12 59 09.48   -17 28 36.6   23.0V 10BL4     W84  C~1Qdl      
2015 04  19.12085  12 59 09.44   -17 28 36.2         10BL4     W84  C~1Qdl      
2015 04  19.12732  12 59 09.36   -17 28 35.4         10BL4     W84  C~1Qdl      
2015 04  19.13050  12 59 09.31   -17 28 35.0         10BL4     W84  C~1Qdl      
2015 04  22.11936  12 58 29.72   -17 22 23.7   23.2V 10BL4     W84  C~1Qdl      
2015 04  22.12259  12 58 29.67   -17 22 23.5         10BL4     W84  C~1Qdl      
2015 04  22.12907  12 58 29.58   -17 22 22.5         10BL4     W84  C~1Qdl      
2015 04  22.13224  12 58 29.53   -17 22 22.2         10BL4     W84  C~1Qdl      

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 (  -0.56)      0.00 (   5.20)
  2   0.0002      0.00     0.05       0.00     0.42
  3   0.0005      0.00    -0.03       0.00     0.12
  4   0.0060      0.00     0.51       0.00     0.10
  5   0.0086      0.00     0.20       0.00    -0.41
  6   0.0086      0.00    -0.06       0.00    -0.17
  7   0.0087      0.00     0.24       0.00    -0.12
  8   0.0743      0.00     0.21       0.00    -0.27
  9   0.0745      0.00     0.15       0.00    -0.49
 10   0.1724      0.00     0.02       0.00     0.01
 11   0.1726      0.00     0.53       0.00     0.05
 12   0.2522      0.00     0.12       0.00    -0.02
 13   0.2523      0.00     0.07       0.00    -0.28
 14   0.9785      0.00     0.53       0.00    -0.15
 15   0.9785      0.00     0.37       0.00     0.02
 16   0.9786      0.00     0.29       0.00    -0.14
 17   1.1392      0.00    -0.26       0.00     0.14
 18   1.1394      0.00    -0.05       0.00    -0.19
 19   2.1934      0.00     0.09       0.00    -0.08
 20   2.1936      0.00     0.11       0.00     0.09
 21   5.2486      0.00     0.02       0.00    -0.08
 22   5.2486      0.00     0.07       0.00    -0.07
 23   5.2486      0.00     0.20       0.00    -0.07
 24   5.2486      0.00     0.10       0.00    -0.06
 25   5.2568      0.00     0.34       0.00    -0.07
 26   5.2568      0.00     0.24       0.00    -0.27
 27   5.2568      0.00     0.19       0.00    -0.08
 28   5.2569      0.00     0.08       0.00    -0.17

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.

10BL4    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        18.680    18.680    18.681
ecceobj         0.538     0.538     0.538
incobj         20.773    20.773    20.773
qmin            8.385     8.401     8.367
qmax           28.987    29.818    29.652
amean          18.213    18.352    18.622
amin           17.749    17.871    17.045
amax           18.750    19.382    19.303
emean           0.529     0.536     0.535
emin            0.507     0.527     0.485
emax            0.546     0.545     0.554
imean          21.544    21.175    21.784
imin           20.970    20.865    20.454
imax           22.454    22.553    24.206
excite_mean     0.644     0.647     0.652
fracstop        0.002     0.002     0.003
cjmean          2.886     2.875     2.857

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       281.7     278.9     283.5
kozaiamp         27.0      27.9      28.4