Orbit Fit and Astrometric record for 471921

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: 471921    
# Created Mon Oct 23 01:36:53 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   35 observations of   35
# Arc:  16.01y
# First observation: 1999/03/21
#  Last observation: 2015/03/23
# Chi-squared of fit:    73.46 DOF:   64 RMS:  0.26
# Min/Max residuals:    -0.40    1.23
# Exact a, adot, b, bdot, g, gdot:
  1.385678E-05  1.798138E-02  4.014367E-06  4.209145E-03  2.105999E-02 -1.258758E-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
   -9.760735  157.471167   -0.387953   -0.157279   -0.912864  2451258.730222
# Heliocentric elements and errors
Epoch:              2451258.5000  =  1999/03/21
Mean Anomaly:          227.62417 +/-     0.000
Argument of Peri:      102.65104 +/-     0.000
Long of Asc Node:      193.02850 +/-     0.000
Inclination:            16.35318 +/-     0.000
Eccentricity:         0.08217856 +/-    0.0000
Semi-Major Axis:     45.70425859 +/-    0.0000
Time of Perihelion: 2492757.6890 +/-       0.0
Perihelion:          41.94834847 +/-    0.0000
Aphelion:            49.46016871 +/-    0.0000
Period (y)              308.9891 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -44.22122231 +/-    0.0000
Ecliptic Y           17.92621231 +/-    0.0000
Ecliptic Z           -8.04985089 +/-    0.0000
Ecliptic XDOT        -0.00083453 +/-    0.0000
Ecliptic YDOT        -0.00217661 +/-    0.0000
Ecliptic ZDOT         0.00056703 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   48.39079812 +/-    0.0000
Geocenter to KBO     47.48347989 +/-    0.0000
# Hcoef:  5.29

The following table shows the complete astrometric record for 471921. 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 (471921) followed by the observatory code and reference code for the source of the astrometry.

1999 03  21.229479 10 22 12.20   -00 18 22.1         471921    645  C~1urZ      
1999 03  21.230301 10 22 12.20   -00 18 22.1         471921    645  C~1urZ      
1999 03  21.232789 10 22 12.19   -00 18 22.1         471921    645  C~1urZ      
2000 05  07.164572 10 24 33.44   -00 07 29.0         471921    645  C~1q9f      
2000 05  07.165394 10 24 33.44   -00 07 29.0         471921    645  C~1q9f      
2000 05  07.167882 10 24 33.44   -00 07 28.9         471921    645  C~1q9f      
2001 02  22.383420 10 32 17.36   -00 48 50.6   21.9V 471921    645  C~1q9f      
2001 02  22.384249 10 32 17.36   -00 48 50.6   21.4V 471921    645  C~1q9f      
2001 02  22.386737 10 32 17.34   -00 48 50.6   22.9V 471921    645  C~1q9f      
2013 03  17.11892  11 22 09.124  -02 29 59.39        471921    807  C~14Qh      
2013 03  17.18090  11 22 08.886  -02 29 57.77  21.8r 471921    807  C~14Qh      
2013 03  17.24550  11 22 08.616  -02 29 55.88        471921    807  C~14Qh      
2013 05  07.97153  11 19 27.948  -02 06 34.48        471921    807  C~14Qh      
2013 05  07.99188  11 19 27.908  -02 06 33.98  21.9r 471921    807  C~14Qh      
2013 05  08.98930  11 19 26.184  -02 06 12.89        471921    807  C~14Qh      
2014 04  30.99423  11 24 01.987  -02 18 25.16  21.7r 471921    304  C~14Qh      
2014 05  01.98533  11 23 59.730  -02 18 01.87        471921    304  C~14Qh      
2015 02  24.44593  11 32 16.833  -02 58 01.60  22.1w 471921    F51  C~1vWx      
2015 02  24.46019  11 32 16.791  -02 58 01.68  22.4w 471921    F51  C~1vWx      
2015 02  24.47448  11 32 16.722  -02 58 01.29  22.2w 471921    F51  C~1vWx      
2015 02  24.48876  11 32 16.671  -02 58 00.89  22.0w 471921    F51  C~1vWx      
2015 02  25.46663  11 32 12.966  -02 57 36.41  22.1w 471921    F51  C~1vWx      
2015 02  25.48058  11 32 12.922  -02 57 36.35  22.5w 471921    F51  C~1vWx      
2015 02  25.49453  11 32 12.858  -02 57 35.72  21.9w 471921    F51  C~1vWx      
2015 02  25.50842  11 32 12.799  -02 57 35.45  22.3w 471921    F51  C~1vWx      
2015 03  16.18348  11 30 59.28   -02 49 05.6   21.8R 471921    G37  C~1N7m      
2015 03  16.25152  11 30 59.02   -02 49 04.0         471921    G37  C~1N7m      
2015 03  22.39859  11 30 34.638  -02 46 04.86  22.0w 471921    F51  C~1vWx      
2015 03  22.41247  11 30 34.584  -02 46 04.26  22.1w 471921    F51  C~1vWx      
2015 03  22.42630  11 30 34.528  -02 46 03.96  22.0w 471921    F51  C~1vWx      
2015 03  22.44013  11 30 34.471  -02 46 03.49  22.0w 471921    F51  C~1vWx      
2015 03  23.42739  11 30 30.606  -02 45 34.37  21.9w 471921    F51  C~1vWx      
2015 03  23.44132  11 30 30.549  -02 45 34.07  22.1w 471921    F51  C~1vWx      
2015 03  23.45518  11 30 30.492  -02 45 33.78  22.3w 471921    F51  C~1vWx      
2015 03  23.46901  11 30 30.450  -02 45 33.32  21.9w 471921    F51  C~1vWx      

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    -0.17       0.00     1.23
  2   0.0000      0.00    -0.05       0.00    -0.18
  3   0.0000      0.00    -0.07       0.00    -0.25
  4   1.1306      0.00     0.24       0.00     0.43
  5   1.1306      0.00     0.25       0.00     0.41
  6   1.1306      0.00     0.28       0.00     0.47
  7   1.9279      0.00    -0.07       0.00    -0.32
  8   1.9279      0.00    -0.02       0.00    -0.34
  9   1.9279      0.00    -0.17       0.00    -0.40
 10  13.9901      0.00    -0.15       0.00     0.49
 11  13.9903      0.00     0.03       0.00     0.31
 12  13.9905      0.00    -0.12       0.00     0.32
 13  14.1321      0.00     0.35       0.00    -0.09
 14  14.1321      0.00     0.30       0.00    -0.02
 15  14.1349      0.00     0.17       0.00     0.08
 16  15.1123      0.00    -0.19       0.00    -0.04
 17  15.1150      0.00    -0.34       0.00    -0.19
 18  15.9321      0.00     0.03       0.00     0.30
 19  15.9322      0.00     0.22       0.00    -0.13
 20  15.9322      0.00     0.01       0.00    -0.10
 21  15.9323      0.00     0.07       0.00    -0.05
 22  15.9349      0.00     0.08       0.00    -0.01
 23  15.9350      0.00     0.23       0.00    -0.30
 24  15.9350      0.00     0.09       0.00    -0.02
 25  15.9351      0.00     0.01       0.00    -0.10
 26  15.9862      0.00    -0.13       0.00     0.39
 27  15.9864      0.00     0.09       0.00     0.03
 28  16.0032      0.00    -0.05       0.00    -0.25
 29  16.0032      0.00    -0.03       0.00    -0.06
 30  16.0033      0.00    -0.04       0.00    -0.16
 31  16.0033      0.00    -0.06       0.00    -0.10
 32  16.0060      0.00     0.08       0.00    -0.03
 33  16.0061      0.00     0.06       0.00    -0.14
 34  16.0061      0.00     0.03       0.00    -0.26
 35  16.0061      0.00     0.23       0.00    -0.21

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.

471921    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        45.787    45.787    45.787
ecceobj         0.080     0.080     0.080
incobj         16.351    16.351    16.351
qmin           41.731    41.720    41.745
qmax           50.493    50.463    50.512
amean          45.979    45.979    45.979
amin           45.607    45.613    45.605
amax           46.370    46.362    46.369
emean           0.077     0.077     0.077
emin            0.067     0.067     0.067
emax            0.089     0.089     0.089
imean          16.503    16.503    16.503
imin           16.201    16.201    16.201
imax           16.782    16.782    16.786
excite_mean     0.294     0.294     0.294
fracstop        1.000     1.000     1.000
cjmean          3.018     3.018     3.018

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       183.0     183.0     183.1
kozaiamp        180.0     180.0     179.9