Orbit Fit and Astrometric record for 120348

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: 120348    
# Created Tue Dec 12 02:36:36 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   49 observations of   50
# Arc:  33.23y
# First observation: 1983/07/16
#  Last observation: 2016/10/07
# Chi-squared of fit:   137.71 DOF:   92 RMS:  0.30
# Min/Max residuals:    -1.58    0.70
# Exact a, adot, b, bdot, g, gdot:
  1.150618E-05  2.214459E-02 -4.753207E-06 -8.486500E-03  2.478079E-02 -4.401664E-04
# 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
  -13.332464   -7.943402    0.854252   -0.124131   -0.524951  2445532.274027
# Heliocentric elements and errors
Epoch:              2445532.5000  =  1983/07/17
Mean Anomaly:          216.25444 +/-     0.000
Argument of Peri:        0.67180 +/-     0.000
Long of Asc Node:      140.46435 +/-     0.000
Inclination:            24.82551 +/-     0.000
Eccentricity:         0.06445781 +/-    0.0000
Semi-Major Axis:     38.81515100 +/-    0.0000
Time of Perihelion: 2480801.4307 +/-       0.0
Perihelion:          36.31321118 +/-    0.0000
Aphelion:            41.31709082 +/-    0.0000
Period (y)              241.8300 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           39.30131293 +/-    0.0000
Ecliptic Y           -6.35520909 +/-    0.0000
Ecliptic Z           -9.30588519 +/-    0.0000
Ecliptic XDOT         0.00008500 +/-    0.0000
Ecliptic YDOT         0.00245605 +/-    0.0000
Ecliptic ZDOT        -0.00090129 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   40.88499950 +/-    0.0000
Geocenter to KBO     40.35388784 +/-    0.0000
# Hcoef:  4.58

The following table shows the complete astrometric record for 120348. 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 (120348) followed by the observatory code and reference code for the source of the astrometry.

1983 07  16.77340  23 52 28.61   -15 22 14.2         120348    260   o1719      
1983 10  07.53708  23 47 15.30   -16 11 29.4         120348    260   o1719      
1991 09  06.65410  00 35 30.17   -15 03 03.1         120348    260   o1719      
2001 08  20.54252  01 33 59.72   -12 56 32.0   19.9R 120348    608  Co1719      
2001 09  21.33655  01 32 15.26   -13 19 13.3   19.4R 120348    644  Co1719      
2001 10  14.46036  01 30 28.46   -13 32 59.0   19.9R 120348    644  Co1719      
2002 08  23.49326  01 39 39.86   -12 44 12.4   19.9R 120348    644  Co1719      
2002 08  24.48409  01 39 37.65   -12 44 55.0   20.2R 120348    644  Co1719      
2002 11  05.15694  01 34 34.70   -13 27 18.3         120348    644  Cn8896      
2002 11  05.17840  01 34 35.05   -13 27 19.1   19.8R 120348    644  Co1719      
2004 08  19.39730  01 51 18.35   -12 11 43.5         120348    675  Cn8896      
2004 08  25.40102  01 51 06.66   -12 16 01.7         120348    675  Cn8897      
2004 10  03.28506  01 48 48.56   -12 43 10.3   19.8R 120348    675  Cn8897      
2004 10  03.35041  01 48 48.28   -12 43 12.6   20.3R 120348    675  Cn8897      
2004 10  03.41437  01 48 47.95   -12 43 15.0   20.0R 120348    675  Cn8897      
2004 10  04.27879  01 48 43.98   -12 43 47.2   20.1R 120348    675  Cn8897      
2004 10  04.34391  01 48 43.68   -12 43 49.6   19.7R 120348    675  Cn8897      
2004 10  04.40960  01 48 43.36   -12 43 51.8   19.8R 120348    675  Cn8897      
2005 08  30.08059  01 56 42.78   -12 03 31.7   20.5R 120348    461  Co0223      
2005 08  31.09351  01 56 40.23   -12 04 16.1         120348    461  Co0223      
2005 09  01.07690  01 56 37.74   -12 04 58.8   20. R 120348    461  Co1097      
2012 12  25.07028  02 29 34.44   -10 41 25.5   19.0K 120348    W91  C~1kaB      
2012 12  25.07765  02 29 34.43   -10 41 25.5   19.0J 120348    W91  C~1kaB      
2012 12  25.08143  02 29 34.42   -10 41 25.4   18.9J 120348    W91  C~1kaB      
2014 10  12.55081  02 46 46.324  -09 49 59.57  20.0i 120348    F51  C~1voq      
2014 10  12.56331  02 46 46.284  -09 49 59.94  19.9i 120348    F51  C~1voq      
2014 10  12.57583  02 46 46.226  -09 50 00.45  20.0i 120348    F51  C~1voq      
2014 10  12.58835  02 46 46.165  -09 50 00.80  19.9i 120348    F51  C~1voq      
2014 11  25.36735  02 43 11.503  -10 06 30.40  20.4w 120348    F51  C~1voq      
2014 11  25.37988  02 43 11.442  -10 06 30.48  20.3w 120348    F51  C~1voq      
2014 11  25.39240  02 43 11.383  -10 06 30.55  20.3w 120348    F51  C~1voq      
2014 11  25.40489  02 43 11.326  -10 06 30.68  20.3w 120348    F51  C~1voq      
2014 12  06.36689  02 42 22.378  -10 06 51.00  20.0i 120348    F51  C~1voq      
2014 12  06.37741  02 42 22.348  -10 06 50.77  19.6i 120348    F51  C~1voq      
2014 12  06.38795  02 42 22.300  -10 06 50.83  19.9i 120348    F51  C~1voq      
2014 12  06.39854  02 42 22.257  -10 06 50.79  20.1i 120348    F51  C~1voq      
2014 12  08.37376  02 42 14.101  -10 06 43.73  19.9i 120348    F51  C~1voq      
2014 12  08.38404  02 42 14.054  -10 06 43.73  20.0i 120348    F51  C~1voq      
2014 12  08.39432  02 42 14.017  -10 06 43.62  20.0i 120348    F51  C~1voq      
2014 12  08.40464  02 42 13.971  -10 06 43.59  20.0i 120348    F51  C~1voq      
2015 02  01.23280  02 40 33.918  -09 43 46.00  20.2r 120348    F51  C~1voq      
2015 02  01.24482  02 40 33.925  -09 43 45.60  20.2r 120348    F51  C~1voq      
2015 02  01.25672  02 40 33.939  -09 43 45.13  20.2r 120348    F51  C~1voq      
2015 02  01.26860  02 40 33.940  -09 43 44.65  20.1r 120348    F51  C~1voq      
2015 12  09.31083  02 48 03.523  -09 46 53.79  21.0w 120348    F51  C~1fir      
2015 12  09.32294  02 48 03.416  -09 46 53.73  21.0w 120348    F51  C~1fir      
2015 12  09.34726  02 48 03.318  -09 46 53.48  20.7w 120348    F51  C~1fir      
2016 10  07.55573  02 58 53.184  -09 06 22.53  20.7w 120348    F51  C~1zfv      
2016 10  07.56757  02 58 53.170  -09 06 22.58  20.7w 120348    F51  C~1zfv      
2016 10  07.57942  02 58 53.080  -09 06 23.42  20.6w 120348    F51  C~1zfv      

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    -0.18       0.00    -1.58
  2   0.2266      0.00    -0.29       0.00    -0.78
  3   8.1420      0.00    -0.31       0.00     0.44
  4  18.0966      0.00    -0.03       0.00     0.17
  5  18.1836      0.00    -0.17       0.00    -0.16
  6  18.2469      0.00    -0.23       0.00    -0.45
  7  19.1040      0.00    -0.41       0.00     0.22
  8  19.1067      0.00     0.21       0.00     0.44
  9  19.3056      0.00 (  -6.18)      0.00 (   0.60)
 10  19.3057      0.00     0.57       0.00     0.14
 11  21.0941      0.00     0.25       0.00    -0.32
 12  21.1105      0.00    -0.27       0.00    -0.57
 13  21.2170      0.00     0.08       0.00     0.58
 14  21.2172      0.00     0.45       0.00     0.70
 15  21.2174      0.00    -0.03       0.00     0.65
 16  21.2197      0.00    -0.07       0.00     0.13
 17  21.2199      0.00     0.01       0.00     0.11
 18  21.2201      0.00    -0.15       0.00     0.30
 19  22.1227      0.00     0.39       0.00    -0.18
 20  22.1254      0.00    -0.14       0.00    -0.29
 21  22.1281      0.00     0.30       0.00     0.05
 22  29.4437      0.00     0.07       0.00    -0.06
 23  29.4437      0.00     0.21       0.00    -0.21
 24  29.4437      0.00     0.21       0.00    -0.18
 25  31.2410      0.00    -0.10       0.00    -0.09
 26  31.2410      0.00     0.15       0.00    -0.01
 27  31.2411      0.00     0.14       0.00    -0.07
 28  31.2411      0.00     0.08       0.00     0.03
 29  31.3610      0.00     0.13       0.00     0.09
 30  31.3610      0.00     0.12       0.00     0.09
 31  31.3610      0.00     0.13       0.00     0.10
 32  31.3611      0.00     0.18       0.00     0.05
 33  31.3911      0.00    -0.18       0.00    -0.09
 34  31.3911      0.00     0.05       0.00     0.11
 35  31.3911      0.00     0.00       0.00     0.02
 36  31.3912      0.00     0.04       0.00     0.03
 37  31.3966      0.00     0.03       0.00    -0.02
 38  31.3966      0.00    -0.03       0.00    -0.06
 39  31.3966      0.00     0.05       0.00     0.00
 40  31.3967      0.00     0.01       0.00    -0.02
 41  31.5468      0.00    -0.02       0.00     0.07
 42  31.5468      0.00    -0.05       0.00    -0.04
 43  31.5468      0.00     0.03       0.00    -0.07
 44  31.5469      0.00    -0.09       0.00    -0.08
 45  32.3985      0.00     0.44       0.00    -0.10
 46  32.3985      0.00    -0.39       0.00    -0.09
 47  32.3986      0.00    -0.32       0.00     0.05
 48  33.2287      0.00    -0.01       0.00    -0.19
 49  33.2287      0.00     0.53       0.00     0.21
 50  33.2288      0.00    -0.07       0.00    -0.18

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.

120348    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        39.153    39.153    39.153
ecceobj         0.063     0.063     0.063
incobj         24.822    24.822    24.822
qmin           35.368    35.500    35.477
qmax           42.619    42.479    42.499
amean          38.876    38.870    38.863
amin           38.557    38.579    38.559
amax           39.199    39.189    39.180
emean           0.070     0.069     0.070
emin            0.056     0.055     0.056
emax            0.088     0.085     0.085
imean          23.777    23.786    23.781
imin           23.041    23.052    23.062
imax           24.506    24.509    24.507
excite_mean     0.409     0.409     0.409
fracstop        1.000     1.000     1.000
cjmean          2.849     2.849     2.849

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       172.4     172.2     171.6
kozaiamp        180.0     180.0     180.0