Orbit Fit and Astrometric record for 82155

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: 82155     
# Created Mon Oct 23 01:36:25 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   50 observations of   50
# Arc:  15.93y
# First observation: 2000/05/05
#  Last observation: 2016/04/09
# Chi-squared of fit:   675.92 DOF:   94 RMS:  0.65
# Min/Max residuals:    -1.82    1.86
# Exact a, adot, b, bdot, g, gdot:
  1.910973E-05  3.982765E-02 -1.965714E-06 -8.947094E-03  3.029723E-02 -7.969949E-03
# Covariance matrix:
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
#      lat0       lon0       xBary       yBary       zBary        JD0
    1.416366  174.913539   -0.778775    0.015897   -0.652075  2451669.774933
# Heliocentric elements and errors
Epoch:              2451670.5000  =  2000/05/06
Mean Anomaly:          355.10175 +/-     0.000
Argument of Peri:      199.18004 +/-     0.000
Long of Asc Node:        2.38853 +/-     0.000
Inclination:            12.74080 +/-     0.000
Eccentricity:         0.61575634 +/-    0.0000
Semi-Major Axis:     84.35444645 +/-    0.0000
Time of Perihelion: 2455520.8370 +/-       0.0
Perihelion:          32.41266088 +/-    0.0000
Aphelion:           136.29623203 +/-    0.0000
Period (y)              774.7653 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -33.57869568 +/-    0.0000
Ecliptic Y            2.21056380 +/-    0.0000
Ecliptic Z            0.81581036 +/-    0.0000
Ecliptic XDOT         0.00037170 +/-    0.0000
Ecliptic YDOT        -0.00364053 +/-    0.0000
Ecliptic ZDOT        -0.00082594 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   33.66138729 +/-    0.0000
Geocenter to KBO     33.00648795 +/-    0.0000
# Hcoef:  6.13

The following table shows the complete astrometric record for 82155. 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 (82155) followed by the observatory code and reference code for the source of the astrometry.

2000 05  05.274190 11 43 34.50   +03 19 16.4   21.3V 82155     645  C~1SDZ      
2000 05  05.275019 11 43 34.50   +03 19 16.4   20.9V 82155     645  C~1SDZ      
2000 05  05.277507 11 43 34.49   +03 19 16.4   21.9V 82155     645  C~1SDZ      
2001 03  24.25577  11 54 25.75   +01 39 32.3   21.8V 82155     691  Cc9632      
2001 03  24.27654  11 54 25.63   +01 39 33.4   22.0V 82155     691  Cc9632      
2001 03  24.29744  11 54 25.51   +01 39 34.1   21.9V 82155     691  Cc9632      
2001 04  14.14331  11 52 38.18   +01 49 03.8   21.2V 82155     691  Cc9632      
2001 04  14.16890  11 52 38.00   +01 49 04.3   21.5V 82155     691  Cc9632      
2001 04  14.19436  11 52 37.89   +01 49 05.2   21.4V 82155     691  Cc9632      
2001 04  15.14389  11 52 33.44   +01 49 28.7   21.9V 82155     691  Cc9632      
2001 04  15.16888  11 52 33.37   +01 49 29.8   21.3V 82155     691  Cc9632      
2001 04  15.19374  11 52 33.24   +01 49 30.5   21.5V 82155     691  Cc9632      
2001 04  28.24175  11 51 37.36   +01 54 06.0   21.6V 82155     691  Cd0285      
2001 04  28.26941  11 51 37.27   +01 54 06.3   21.3V 82155     691  Cd0285      
2001 04  28.29687  11 51 37.20   +01 54 07.0   20.9V 82155     691  Cd0285      
2002 01  14.20824  12 06 53.17   -00 10 11.7   21.5R 82155     950  Ce9335      
2002 01  14.24119  12 06 53.12   -00 10 11.5   21.6R 82155     950  Ce9335      
2002 01  14.27863  12 06 53.07   -00 10 11.4   21.5R 82155     950  Ce9335      
2002 02  09.26854  12 05 46.64   -00 05 03.7   21.0R 82155     304  Ce9335      
2002 02  09.30594  12 05 46.50   -00 05 03.0         82155     304  Ce9335      
2002 02  14.58220  12 05 25.57   -00 03 15.5         82155     568  Ce9335      
2002 02  15.13794  12 05 23.38   -00 03 01.6   21.0R 82155     621  Cf2334      
2002 02  15.60566  12 05 21.27   -00 02 52.5   20.9R 82155     568  Ce9335      
2002 02  16.11032  12 05 19.15   -00 02 40.4   21.1R 82155     621  Cf2334      
2002 02  16.14875  12 05 19.12   -00 02 39.1   20.8R 82155     621  Cf2334      
2002 02  17.12801  12 05 14.83   -00 02 17.3   21.1R 82155     621  Cf2334      
2002 05  08.39322  11 58 45.88   +00 32 06.2   20.3R 82155     568  Cf7155      
2002 05  08.48984  11 58 45.59   +00 32 08.1         82155     568  Cf7155      
2003 03  02.45307  12 12 06.90   -01 23 08.8         82155     568  Ch5853      
2003 03  02.50508  12 12 06.63   -01 23 07.5         82155     568  Ch5853      
2003 03  26.98160  12 09 56.07   -01 11 23.4   20.5R 82155     230  Ch5853      
2003 03  27.06528  12 09 55.63   -01 11 21.0         82155     230  Ch5853      
2003 03  27.96087  12 09 50.73   -01 10 54.4   20.5R 82155     230  Ch5853      
2003 03  30.26235  12 09 38.22   -01 09 47.4         82155     291  Ch5853      
2003 03  30.28576  12 09 38.16   -01 09 45.6         82155     291  Ch5853      
2003 03  30.30940  12 09 37.95   -01 09 44.0         82155     291  Ch5853      
2004 03  23.27139  12 18 12.64   -02 40 18.4   21.5V 82155     291  Ck2063      
2004 03  23.29455  12 18 12.50   -02 40 18.1   21.1V 82155     291  Ck2063      
2004 03  23.31763  12 18 12.35   -02 40 17.2   21.4V 82155     291  Ck2063      
2006 04  04.194809 12 33 27.549  -05 31 21.26  21.0R 82155     809  Cq8669      
2006 04  04.309889 12 33 26.897  -05 31 17.89  21.1R 82155     809  Cq8669      
2010 03  09.11573  13 09 27.521  -11 34 53.14  20.5R 82155     809  C~0FHS      
2010 03  09.20051  13 09 27.144  -11 34 51.67  20.5R 82155     809  C~0FHS      
2010 03  09.28400  13 09 26.719  -11 34 50.12  20.9R 82155     809  C~0FHS      
2010 03  10.11263  13 09 22.863  -11 34 34.86  20.5R 82155     809  C~0FHS      
2010 03  10.19649  13 09 22.452  -11 34 33.16  20.8R 82155     809  C~0FHS      
2010 03  10.28087  13 09 22.050  -11 34 31.80  20.7R 82155     809  C~0FHS      
2016 04  09.43881  13 59 52.885  -19 40 58.00  21.7w 82155     F51  C~1r72      
2016 04  09.44908  13 59 52.769  -19 40 57.79  21.8w 82155     F51  C~1r72      
2016 04  09.45937  13 59 52.767  -19 40 57.73  21.6w 82155     F51  C~1r72      

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    -0.24       0.00     0.87
  2   0.0000      0.00     0.17       0.00    -0.67
  3   0.0000      0.00     0.14       0.00    -0.70
  4   0.8843      0.00    -0.55       0.00    -0.94
  5   0.8843      0.00    -0.63       0.00    -0.45
  6   0.8844      0.00    -0.70       0.00    -0.36
  7   0.9415      0.00    -0.24       0.00     0.21
  8   0.9415      0.00    -1.08       0.00     0.09
  9   0.9416      0.00    -0.89       0.00     0.37
 10   0.9442      0.00    -0.53       0.00     0.94
 11   0.9443      0.00     0.21       0.00     1.45
 12   0.9443      0.00     0.05       0.00     1.55
 13   0.9801      0.00     1.01       0.00     0.77
 14   0.9801      0.00     1.29       0.00     0.57
 15   0.9802      0.00     1.86       0.00     0.77
 16   1.6945      0.00     0.41       0.00    -0.32
 17   1.6946      0.00     0.31       0.00    -0.23
 18   1.6947      0.00     0.30       0.00    -0.26
 19   1.7659      0.00    -0.81       0.00     0.41
 20   1.7660      0.00    -0.75       0.00     0.39
 21   1.7804      0.00    -0.93       0.00    -1.17
 22   1.7820      0.00     1.05       0.00     0.57
 23   1.7832      0.00    -0.96       0.00    -0.88
 24   1.7846      0.00    -0.65       0.00    -0.02
 25   1.7847      0.00     1.40       0.00     0.41
 26   1.7874      0.00     0.26       0.00    -0.17
 27   2.0072      0.00    -0.32       0.00    -0.04
 28   2.0074      0.00     0.09       0.00     0.44
 29   2.8232      0.00     0.34       0.00     0.04
 30   2.8234      0.00     0.26       0.00    -0.04
 31   2.8904      0.00    -0.07       0.00    -0.48
 32   2.8906      0.00     0.28       0.00    -0.57
 33   2.8931      0.00     0.14       0.00    -0.58
 34   2.8994      0.00     0.72       0.00    -1.82
 35   2.8994      0.00     1.76       0.00    -0.71
 36   2.8995      0.00     0.58       0.00     0.19
 37   3.8823      0.00    -0.16       0.00     0.39
 38   3.8823      0.00    -0.31       0.00     0.01
 39   3.8824      0.00    -0.63       0.00     0.22
 40   5.9135      0.00    -0.54       0.00    -0.06
 41   5.9139      0.00    -0.62       0.00    -0.11
 42   9.8421      0.00    -0.11       0.00     0.15
 43   9.8424      0.00     0.27       0.00     0.11
 44   9.8426      0.00    -0.11       0.00     0.15
 45   9.8449      0.00     0.40       0.00     0.19
 46   9.8451      0.00     0.30       0.00     0.35
 47   9.8453      0.00     0.40       0.00     0.15
 48  15.9293      0.00     0.27       0.00    -0.10
 49  15.9293      0.00    -0.57       0.00    -0.11
 50  15.9293      0.00     0.30       0.00    -0.26

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.

82155    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        84.201    84.200    84.202
ecceobj         0.615     0.615     0.615
incobj         12.745    12.745    12.745
qmin           31.042    31.016    31.031
qmax          149.072   164.113   142.792
amean          85.836    89.326    81.262
amin           80.347    80.891    76.622
amax           90.730    98.723    87.782
emean           0.625     0.633     0.599
emin            0.592     0.598     0.570
emax            0.643     0.662     0.633
imean          12.390    13.887    13.870
imin           10.801    10.762    11.026
imax           14.374    16.698    15.170
excite_mean     0.661     0.677     0.646
fracstop        1.000     1.000     1.000
cjmean          2.925     2.924     2.923

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       185.5     204.9     213.4
kozaiamp        180.0     180.0     180.0