Orbit Fit and Astrometric record for 90377

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: 90377     
# Created Tue Jul 22 01:37:38 2014
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   88 observations of   91
# Arc:  22.06y
# First observation: 1990/09/25
#  Last observation: 2012/10/15
# Chi-squared of fit:   770.14 DOF:  170 RMS:  0.52
# Min/Max residuals:    -1.58    1.73
# Exact a, adot, b, bdot, g, gdot:
  1.066178E-05  8.500231E-03 -1.919462E-06 -3.965479E-04  1.070442E-02 -3.850771E-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
  -11.715841   41.546724    0.635341   -0.157723   -0.760729  2448159.941292
# Heliocentric elements and errors
Epoch:              2448160.5000  =  1990/09/26
Mean Anomaly:          357.46968 +/-     0.000
Argument of Peri:      311.14718 +/-     0.000
Long of Asc Node:      144.51249 +/-     0.000
Inclination:            11.93386 +/-     0.000
Eccentricity:         0.85572024 +/-    0.0000
Semi-Major Axis:    527.71833864 +/-    0.0000
Time of Perihelion: 2479282.9591 +/-       0.0
Perihelion:          76.13907786 +/-    0.0000
Aphelion:           979.29759941 +/-    0.0000
Period (y)            12123.0384 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           69.46131529 +/-    0.0000
Ecliptic Y           60.70773131 +/-    0.0000
Ecliptic Z          -18.96971375 +/-    0.0000
Ecliptic XDOT        -0.00218386 +/-    0.0000
Ecliptic YDOT         0.00097146 +/-    0.0000
Ecliptic ZDOT         0.00010077 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   94.18203115 +/-    0.0000
Geocenter to KBO     93.41994831 +/-    0.0000
# Hcoef:  1.55

The following table shows the complete astrometric record for 90377. 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 (90377) followed by the observatory code and reference code for the source of the astrometry.

1990 09  25.44063  02 50 51.72   +04 07 48.0   20.5R 90377     261   k1204      
1991 09  11.46806  02 53 03.54   +04 18 01.6   20.6R 90377     261   k1204      
2001 09  26.48667  03 12 35.20   +05 31 31.2         90377     644  Ck1204      
2001 10  24.52713  03 11 44.54   +05 25 59.1         90377     644  Ck1204      
2002 10  09.43293  03 14 19.47   +05 36 50.3         90377     644  Ck1204      
2002 10  29.43127  03 13 39.41   +05 32 59.3         90377     644  Ck1204      
2002 12  13.23936  03 12 02.20   +05 27 21.1   21. R 90377     644  Cl2196      
2003 08  30.41504  03 17 10.06   +05 52 13.3         90377     675  Ck1204      
2003 09  29.38282  03 16 41.92   +05 46 45.3         90377     675  Ck1204      
2003 11  14.27288  03 15 10.09   +05 38 16.5   20.8R 90377     675  Ck1204      
2003 11  14.33594  03 15 09.97   +05 38 15.4   20.5R 90377     675  Ck1204      
2003 11  14.40149  03 15 09.83   +05 38 14.9   20.7R 90377     675  Ck1204      
2003 11  20.27501  03 14 56.51   +05 37 25.3   21.4  90377     926  Ck1204      
2003 11  20.33089  03 14 56.30   +05 37 25.4   22.2R 90377     926  Ck1204      
2003 11  25.28100  03 14 45.30   +05 36 47.5         90377     568  Ck1204      
2003 11  27.02955  03 14 41.44   +05 36 35.5         90377     807  Ck1204      
2003 11  27.13343  03 14 41.21   +05 36 34.8         90377     807  Ck1204      
2003 11  28.03145  03 14 39.23   +05 36 28.9         90377     807  Ck1204      
2003 11  28.11670  03 14 39.05   +05 36 28.5         90377     807  Ck1204      
2003 12  04.05591  03 14 26.25   +05 35 53.6   20.5R 90377     807  Ck1204      
2003 12  04.09737  03 14 26.16   +05 35 53.5   20.7R 90377     807  Ck1204      
2003 12  14.06076  03 14 06.11   +05 35 11.1         90377     807  Ck1204      
2003 12  14.14978  03 14 05.96   +05 35 10.6         90377     807  Ck1204      
2003 12  31.12274  03 13 37.64   +05 34 50.7   20.7R 90377     807  Ck1204      
2003 12  31.15813  03 13 37.59   +05 34 50.5   20.9R 90377     807  Ck1204      
2003 12  31.19148  03 13 37.53   +05 34 50.8   20.6R 90377     807  Ck1204      
2004 03  13.76672  03 13 46.98   +05 45 08.3         90377     246  Ck1204      
2004 03  14.76461  03 13 48.60   +05 45 21.0   20.7R 90377     246  Ck1204      
2004 03  14.77174  03 13 48.64   +05 45 22.7         90377     246  Ck1204      
2004 03  14.77351  03 13 48.68   +05 45 22.0         90377     246  Ck1204      
2004 03  14.77448  03 13 48.70   +05 45 21.2         90377     246  Ck1204      
2004 03  15.11461  03 13 49.23   +05 45 26.5         90377     333  Ck1204      
2004 03  17.11649  03 13 52.75   +05 45 54.1   20.9R 90377     926  Ck1204      
2004 03  17.80351  03 13 54.13   +05 46 02.5   20.8R 90377     204  Ck1204      
2004 03  18.11597  03 13 54.57   +05 46 07.5   20.8R 90377     926  Ck1204      
2004 03  19.11898  03 13 56.39   +05 46 21.4         90377     926  Ck1204      
2004 09  06.49288  03 19 12.05   +05 58 47.0   20.7R 90377     695  Cl4028      
2004 09  07.49615  03 19 11.39   +05 58 36.6   20.7R 90377     695  Cl4028      
2004 09  18.08079  03 19 01.87   +05 56 39.8         90377     246  Cl5152      
2004 09  18.08219  03 19 01.85   +05 56 41.0         90377     246  Cl5152      
2004 09  18.10552  03 19 01.87   +05 56 40.1   20.3R 90377     204  Cl5152      
2004 09  18.98934  03 19 00.85   +05 56 29.4         90377     246  Cl5152      
2004 09  18.99145  03 19 00.83   +05 56 29.4         90377     246  Cl5152      
2004 09  18.99353  03 19 00.81   +05 56 29.7         90377     246  Cl5152      
2004 09  19.14367  03 19 00.98   +05 56 27.9         90377     204  Cl5152      
2004 10  11.00228  03 18 27.86   +05 52 10.4   20.7R 90377     213  Cl7408      
2004 10  11.02993  03 18 27.78   +05 52 10.0   20.7R 90377     213  Cl7408      
2004 10  15.96099  03 18 18.51   +05 51 13.4   20.8R 90377     213  Cl8230      
2004 10  16.00865  03 18 18.38   +05 51 14.1   20.8R 90377     213  Cl8230      
2004 11  16.92013  03 17 08.686  +05 45 39.42  20.6R 90377     176  Cm0257      
2004 11  17.93921  03 17 06.320  +05 45 30.87  20.6R 90377     176  Cm0257      
2004 12  10.22765  03 16 18.01   +05 43 13.7   21.0R 90377     G98  Cm3425      
2004 12  11.24828  03 16 15.96   +05 43 09.9   21.0R 90377     G98  Cm3425      
2004 12  12.25523  03 16 13.99   +05 43 06.6   21.0R 90377     G98  Cm3425      
2004 12  13.19287  03 16 12.17   +05 43 03.5   20.8R 90377     G98  Cm3425      
2005 01  14.80565  03 15 25.44   +05 43 21.5   20.4V 90377     240  Ct6836      
2005 01  29.11722  03 15 17.80   +05 44 46.3         90377     701  Cm7661      
2005 01  30.14696  03 15 17.58   +05 44 54.6         90377     701  Cm7661      
2005 01  31.12318  03 15 17.42   +05 45 02.8         90377     701  Cm7661      
2005 03  04.14167  03 15 36.22   +05 50 43.3   21.3V 90377     G95  Cm7661      
2005 09  13.08772  03 21 14.06   +06 05 32.3   20.8R 90377     204  Co2409      
2005 11  08.00740  03 19 36.80   +05 54 56.7   20.8R 90377     213  Cp0438      
2005 11  08.02519  03 19 36.77   +05 54 57.1   20.8R 90377     213  Cp0438      
2006 01  03.88475  03 17 43.41   +05 50 39.1   20.0R 90377     235  Cp8602      
2007 10  12.40501  03 24 51.141  +06 15 50.25  21.3R 90377     675  C~0B98      
2007 10  12.44643  03 24 51.064  +06 15 50.17  21.0R 90377     675  C~0B98      
2007 10  14.41002  03 24 47.413  +06 15 26.40  21.0R 90377     675  C~0B98      
2007 10  14.45649  03 24 47.314  +06 15 26.89  21.0R 90377     675  C~0B98      
2007 11  08.22116  03 23 54.80   +06 10 55.6   20.9R 90377     H82  Cw7881      
2007 11  08.25394  03 23 54.66   +06 10 55.3   21.1R 90377     H82  Cw7881      
2007 11  08.28672  03 23 54.57   +06 10 56.0   20.9R 90377     H82  Cw7881      
2008 10  23.21467  03 26 38.79   +06 21 38.0   21.0R 90377     H82  C~00H1      
2008 10  23.23622  03 26 38.71   +06 21 37.2   20.8R 90377     H82  C~00H1      
2008 10  23.25777  03 26 38.55   +06 21 38.2   20.6R 90377     H82  C~00H1      
2008 10  23.32243  03 26 38.48   +06 21 36.0   20.6R 90377     H82  C~00H1      
2008 10  23.34398  03 26 38.44   +06 21 36.3   20.7R 90377     H82  C~00H1      
2008 11  07.32602  03 26 05.38   +06 18 57.2   20.1C 90377     H10  C~03vw      
2009 11  13.26988  03 28 03.66   +06 26 08.6   20.6R 90377     735  C~0BW3      
2009 11  13.31411  03 28 03.57   +06 26 07.7   20.6R 90377     735  C~0BW3      
2009 11  17.24602  03 27 54.35   +06 25 33.8   20.9R 90377     735  C~0BW3      
2009 11  17.28953  03 27 54.28   +06 25 32.7   20.5R 90377     735  C~0BW3      
2009 11  22.22095  03 27 42.84   +06 24 53.2   20.4R 90377     735  C~0C02      
2009 11  22.24801  03 27 42.78   +06 24 53.3   20.7R 90377     735  C~0C02      
2010 01  05.240888 03 26 16.853  +06 22 38.38  20.6R 90377     F65  C~0CyX      
2010 01  05.243336 03 26 16.851  +06 22 38.29  20.5R 90377     F65  C~0CyX      
2012 10  15.34848  03 35 47.46   +06 55 29.0   20.3R 90377     G32  C~0l0L      
2012 10  15.35209  03 35 47.47   +06 55 28.9   20.6R 90377     G32  C~0l0L      
2012 10  15.36924  03 35 47.42   +06 55 29.3   20.2R 90377     G32  C~0l0L      
2012 10  15.37345  03 35 47.42   +06 55 28.7   20.6R 90377     G32  C~0l0L      
2012 10  16.37144  03 35 45.49   +06 55 17.5   19.7R 90377     G32  C~0l0L      
2012 10  16.37505  03 35 45.45   +06 55 17.2   19.9R 90377     G32  C~0l0L      

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    -0.08       0.00    -0.48
  2   0.9611      0.00    -0.28       0.00    -0.18
  3  11.0035      0.00     0.45       0.00    -0.75
  4  11.0803      0.00     0.53       0.00    -0.42
  5  12.0383      0.00     0.23       0.00    -0.01
  6  12.0931      0.00     0.31       0.00     0.06
  7  12.2157      0.00     0.10       0.00     0.07
  8  12.9281      0.00     0.33       0.00    -0.42
  9  13.0101      0.00    -0.33       0.00    -0.02
 10  13.1357      0.00    -0.30       0.00     0.42
 11  13.1359      0.00     0.08       0.00    -0.12
 12  13.1361      0.00     0.24       0.00    -0.03
 13  13.1522      0.00    -0.04       0.00    -0.09
 14  13.1523      0.00    -1.27       0.00     0.46
 15  13.1659      0.00    -0.08       0.00    -0.28
 16  13.1707      0.00     0.01       0.00    -0.30
 17  13.1710      0.00     0.04       0.00    -0.31
 18  13.1734      0.00    -0.13       0.00    -0.26
 19  13.1737      0.00     0.01       0.00    -0.10
 20  13.1899      0.00    -0.46       0.00     0.24
 21  13.1900      0.00    -0.48       0.00     0.36
 22  13.2173      0.00    -0.58       0.00     0.46
 23  13.2175      0.00    -0.23       0.00     0.24
 24  13.2640      0.00     0.24       0.00     0.71
 25  13.2641      0.00     0.25       0.00     0.49
 26  13.2642      0.00     0.06       0.00     0.76
 27  13.4656      0.00     0.66       0.00     1.05
 28  13.4684      0.00    -0.50       0.00    -0.04
 29  13.4684      0.00    -0.09       0.00     1.56
 30  13.4684      0.00     0.47       0.00     0.84
 31  13.4684      0.00     0.74       0.00     0.02
 32  13.4693      0.00    -0.10       0.00     0.59
 33  13.4748      0.00    -0.40       0.00     0.29
 34  13.4767      0.00     1.57       0.00    -0.91
 35  13.4776      0.00    -0.42       0.00    -0.32
 36  13.4803      0.00    -1.06       0.00    -0.53
 37  13.9495      0.00    -0.20       0.00    -0.03
 38  13.9522      0.00    -0.06       0.00     0.02
 39  13.9812      0.00    -0.21       0.00    -0.80
 40  13.9812      0.00    -0.49       0.00     0.41
 41  13.9813      0.00     0.20       0.00    -0.23
 42  13.9837      0.00    -0.28       0.00    -0.84
 43  13.9837      0.00    -0.54       0.00    -0.81
 44  13.9837      0.00    -0.81       0.00    -0.49
 45  13.9841      0.00 (   4.36)      0.00 (  -0.58)
 46  14.0440      0.00     1.73       0.00     0.31
 47  14.0441      0.00     1.30       0.00     0.23
 48  14.0576      0.00 (   2.31)      0.00 (   1.95)
 49  14.0577      0.00 (   1.78)      0.00 (   3.21)
 50  14.1451      0.00     0.27       0.00    -0.29
 51  14.1478      0.00    -0.41       0.00    -0.38
 52  14.2089      0.00    -0.18       0.00    -0.24
 53  14.2117      0.00    -0.51       0.00    -0.17
 54  14.2144      0.00    -0.39       0.00     0.11
 55  14.2170      0.00    -0.41       0.00     0.15
 56  14.3063      0.00     0.29       0.00     0.21
 57  14.3455      0.00     0.37       0.00    -0.31
 58  14.3483      0.00     0.15       0.00     0.17
 59  14.3509      0.00    -0.01       0.00     0.76
 60  14.4386      0.00    -0.15       0.00    -0.13
 61  14.9669      0.00    -0.19       0.00     0.19
 62  15.1200      0.00     0.55       0.00    -0.91
 63  15.1200      0.00     0.72       0.00    -0.34
 64  15.2757      0.00    -1.58       0.00    -1.10
 65  17.0458      0.00    -0.10       0.00    -0.15
 66  17.0459      0.00    -0.10       0.00     0.26
 67  17.0513      0.00    -0.12       0.00    -0.44
 68  17.0514      0.00    -0.26       0.00     0.60
 69  17.1192      0.00     0.81       0.00     0.00
 70  17.1193      0.00    -0.15       0.00     0.02
 71  17.1194      0.00    -0.36       0.00     1.04
 72  18.0774      0.00     1.42       0.00     0.35
 73  18.0775      0.00     0.91       0.00    -0.20
 74  18.0775      0.00    -0.81       0.00     1.04
 75  18.0777      0.00     0.21       0.00    -0.44
 76  18.0778      0.00     0.29       0.00     0.10
 77  18.1188      0.00     0.45       0.00    -0.91
 78  19.1344      0.00     0.25       0.00     0.36
 79  19.1345      0.00     0.47       0.00    -0.14
 80  19.1453      0.00    -0.43       0.00     0.11
 81  19.1454      0.00     0.07       0.00    -0.62
 82  19.1589      0.00     0.54       0.00    -0.78
 83  19.1590      0.00     0.60       0.00    -0.48
 84  19.2794      0.00     0.01       0.00     0.30
 85  19.2794      0.00     0.03       0.00     0.20
 86  22.0559      0.00    -0.12       0.00     0.04
 87  22.0559      0.00     0.13       0.00    -0.02
 88  22.0559      0.00    -0.12       0.00     0.58
 89  22.0559      0.00     0.00       0.00     0.03
 90  22.0587      0.00    -0.37       0.00     0.24
 91  22.0587      0.00    -0.86       0.00    -0.02

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.

90377    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj       549.666   549.641   549.690
ecceobj         0.861     0.861     0.861
incobj         11.925    11.925    11.925
qmin           69.520    69.520    69.519
qmax         1042.524  1042.077  1042.083
amean         507.248   507.229   507.269
amin          475.879   477.091   477.223
amax          559.366   559.162   559.151
emean           0.850     0.849     0.850
emin            0.837     0.837     0.837
emax            0.864     0.864     0.864
imean          10.711    10.711    10.711
imin           10.416    10.418    10.416
imax           11.028    11.026    11.034
excite_mean     0.870     0.870     0.870
fracstop        1.000     1.000     1.000
cjmean          4.314     4.314     4.314

libcent 0       183.5    -180.0    -180.0
libamp  0       175.1    -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       312.6     312.6     312.6
kozaiamp          3.1       3.1       3.1