Orbit Fit and Astrometric record for 11BT163

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: 11BT163   
# Created Tue Oct 24 01:37:56 2017
# Orbit generated from Bernstein formalism
# Fitting   17 observations of   18
# Arc:   3.10y
# First observation: 2011/01/30
#  Last observation: 2014/03/06
Preliminary a, adot, b, bdot, g, gdot:
   0.000074   0.019555  -0.000088  -0.012567   0.022898   0.000000
# Chi-squared of fit:     6.66 DOF:   28 RMS:  0.11
# Min/Max residuals:    -0.26    0.21
# Exact a, adot, b, bdot, g, gdot:
  1.360557E-05  1.999112E-02 -8.699948E-06 -1.282014E-02  2.365488E-02  6.990772E-03
# Covariance matrix:
  3.1596E-13 -1.9102E-13 -3.3259E-14  9.7705E-14  2.1618E-13 -2.4771E-12
 -1.9102E-13  1.4754E-12  2.2680E-13 -6.5680E-13  3.6542E-12  1.6660E-11
 -3.3259E-14  2.2680E-13  3.0062E-13 -2.3044E-13  4.2789E-13  3.2021E-12
  9.7705E-14 -6.5680E-13 -2.3044E-13  4.3133E-13 -1.2277E-12 -9.3109E-12
  2.1618E-13  3.6542E-12  4.2789E-13 -1.2277E-12  1.3103E-11  3.1152E-11
 -2.4771E-12  1.6660E-11  3.2021E-12 -9.3109E-12  3.1152E-11  2.3614E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.624047  146.379282    0.277062   -0.026878   -0.948165  2455591.851956
# Heliocentric elements and errors
Epoch:              2455590.5000  =  2011/01/29
Mean Anomaly:           38.53668 +/-     0.044
Argument of Peri:      110.95426 +/-     0.081
Long of Asc Node:      323.53496 +/-     0.000
Inclination:            32.71467 +/-     0.001
Eccentricity:         0.33680829 +/-    0.0006
Semi-Major Axis:     53.82757364 +/-    0.0362
Time of Perihelion: 2440149.4268 +/-       8.5
Perihelion:          35.69800040 +/-    0.0408
Aphelion:            71.95714688 +/-    0.0586
Period (y)              394.9257 +/-      0.40
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -35.82141483 +/-    0.0054
Ecliptic Y           24.15262117 +/-    0.0036
Ecliptic Z           -1.19849915 +/-    0.0002
Ecliptic XDOT        -0.00192070 +/-    0.0000
Ecliptic YDOT        -0.00149612 +/-    0.0000
Ecliptic ZDOT        -0.00150614 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   43.21989438 +/-    0.0049
Geocenter to KBO     42.27456880 +/-    0.0065
# Hcoef:  6.15

The following table shows the complete astrometric record for 11BT163. 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 (11BT163) followed by the observatory code and reference code for the source of the astrometry.

2011 01  30.35119  09 52 12.605  +11 11 43.38  22.8w 11BT163   F51  C~1w3m      
2011 01  30.38138  09 52 12.460  +11 11 43.97  22.7w 11BT163   F51  C~1w3m      
2011 02  03.37461  09 51 53.581  +11 12 49.98  22.5w 11BT163   F51  C~1w3m      
2011 02  03.39004  09 51 53.515  +11 12 50.44  22.6w 11BT163   F51  C~1w3m      
2012 02  03.54090  09 55 14.930  +10 08 31.11  22.3i 11BT163   F51  C~1w3m      
2012 02  14.35917  09 54 23.184  +10 11 39.34  22.6w 11BT163   F51  C~1w3m      
2012 02  14.37339  09 54 23.169  +10 11 39.52  22.6w 11BT163   F51  C~1w3m      
2012 02  14.38755  09 54 23.067  +10 11 39.95  22.6w 11BT163   F51  C~1w3m      
2012 02  14.40173  09 54 22.997  +10 11 40.08  22.4w 11BT163   F51  C~1w3m      
2013 02  21.45534  09 57 03.642  +09 10 28.41  21.3i 11BT163   F51  C~1w3m      
2013 03  04.31276  09 56 12.969  +09 13 48.98  22.3w 11BT163   F51  C~1w3m      
2013 03  04.32701  09 56 12.903  +09 13 49.22  22.1w 11BT163   F51  C~1w3m      
2013 03  04.34125  09 56 12.854  +09 13 49.52  22.3w 11BT163   F51  C~1w3m      
2014 02  23.38161  10 00 10.593  +08 08 09.16  22.4w 11BT163   F51  C~1w3m      
2014 02  26.46046  09 59 56.188  +08 09 06.94  22.4w 11BT163   F51  C~1w3m      
2014 02  26.47204  09 59 56.121  +08 09 07.14  22.5w 11BT163   F51  C~1w3m      
2014 02  28.34988  09 59 47.408  +08 09 42.52  22.4w 11BT163   F51  C~1w3m      
2014 03  06.36532  09 59 19.988  +08 11 35.54  21.7i 11BT163   F51  C~1w3m      

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    -0.05       0.00     0.03
  2   0.0001     -2.21    -0.11      -0.17     0.11
  3   0.0110   -285.97     0.04     -31.79    -0.13
  4   0.0111   -287.04     0.10     -31.69     0.09
  5   1.0108   3814.18     0.21   -2657.74    -0.02
  6   1.0404   3031.40    -0.26   -2740.13    -0.20
  7   1.0404   3031.13 (   0.52)  -2740.04 (   0.00)
  8   1.0405   3029.56     0.01   -2740.14     0.00
  9   1.0405   3028.55     0.05   -2740.37    -0.12
 10   2.0619   6514.74    -0.14   -5387.34     0.08
 11   2.0916   5740.07    -0.02   -5454.32     0.09
 12   2.0917   5739.07    -0.02   -5454.43     0.06
 13   2.0917   5738.28     0.20   -5454.39     0.19
 14   3.0665  10409.63    -0.08   -7959.74     0.09
 15   3.0749  10188.20     0.15   -7978.68     0.01
 16   3.0749  10187.19    -0.01   -7978.84    -0.07
 17   3.0801  10053.12    -0.04   -7989.87    -0.12
 18   3.0965   9630.68    -0.04   -8022.93    -0.07

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.

11BT163    quality flag:2

Type:     12:5EEEEEE  SCATNEAR  SCATNEAR

axisobj        54.086    54.200    53.971
ecceobj         0.340     0.341     0.339
incobj         32.692    32.693    32.690
qmin           33.342    34.793    35.068
qmax           75.637    73.740    73.308
amean          53.971    53.953    53.831
amin           53.402    53.349    53.303
amax           54.705    54.708    54.505
emean           0.353     0.325     0.326
emin            0.319     0.306     0.307
emax            0.383     0.352     0.347
imean          33.340    34.242    34.179
imin           32.401    33.486    33.625
imax           34.367    34.837    34.737
excite_mean     0.653     0.650     0.650
fracstop        1.000     1.000     1.000
cjmean          2.649     2.649     2.649

libcent 0       180.4    -180.0    -180.0
libamp  0       124.9    -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       221.7     175.9     174.0
kozaiamp        111.5     180.0     180.0