Orbit Fit and Astrometric record for 55576

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: 55576     
# Created Fri Dec 19 02:37:04 2014
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   73 observations of   81
# Arc:  15.57y
# First observation: 1987/11/24
#  Last observation: 2003/06/22
# Chi-squared of fit:   627.87 DOF:  140 RMS:  0.52
# Min/Max residuals:    -1.61    1.62
# Exact a, adot, b, bdot, g, gdot:
  1.935105E-05  6.913121E-02 -5.552329E-06 -1.450826E-02  4.992130E-02 -2.436694E-02
# 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
    6.372016  110.497282    0.739394    0.072700   -0.651445  2447123.929809
# Heliocentric elements and errors
Epoch:              2447124.5000  =  1987/11/25
Mean Anomaly:          316.32045 +/-     0.000
Argument of Peri:      238.86089 +/-     0.000
Long of Asc Node:      315.51379 +/-     0.000
Inclination:            13.35234 +/-     0.000
Eccentricity:         0.39176777 +/-    0.0000
Semi-Major Axis:     25.01436414 +/-    0.0000
Time of Perihelion: 2452668.9472 +/-       0.0
Perihelion:          15.21454247 +/-    0.0000
Aphelion:            34.81418581 +/-    0.0000
Period (y)              125.1101 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           -6.50429572 +/-    0.0000
Ecliptic Y           19.51717841 +/-    0.0000
Ecliptic Z            2.22309334 +/-    0.0000
Ecliptic XDOT        -0.00311889 +/-    0.0000
Ecliptic YDOT        -0.00248238 +/-    0.0000
Ecliptic ZDOT        -0.00093909 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   20.69239524 +/-    0.0000
Geocenter to KBO     20.03171462 +/-    0.0000
# Hcoef:  7.45

The following table shows the complete astrometric record for 55576. 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 (55576) followed by the observatory code and reference code for the source of the astrometry.

1987 11  24.42917  07 33 00.32   +28 10 18.5         55576     261   h1599      
1987 11  24.48125  07 32 59.94   +28 10 19.7         55576     261   h1599      
1995 03  02.25660  09 30 44.04   +13 01 50.0   20.5V 55576     691  Ch9406      
1995 03  02.27871  09 30 43.77   +13 01 50.5   20.0V 55576     691  Ch9406      
1995 03  02.30064  09 30 43.55   +13 01 51.8   20.0V 55576     691  Ch9406      
1997 03  09.28819  10 12 25.69   +06 16 39.7         55576     261   g1214      
1997 03  09.32986  10 12 25.25   +06 16 40.9         55576     261   g1214      
2000 04  10.30499  11 16 53.43   -05 01 32.3   19.0R 55576     608  Cg1214      
2000 04  10.31649  11 16 53.35   -05 01 31.8   19.0R 55576     608  Cg1214      
2000 04  10.32762  11 16 53.22   -05 01 30.9   18.9R 55576     608  Cg1214      
2001 03  19.41390  11 45 44.48   -09 32 52.4   18.9R 55576     608  Cg1214      
2001 03  19.42432  11 45 44.36   -09 32 52.0   18.7R 55576     608  Cg1214      
2002 01  14.50581  12 19 39.39   -13 41 28.6   18.9R 55576     608  Cg1214      
2002 01  14.51656  12 19 39.40   -13 41 29.6   19.0R 55576     608  Cg1214      
2002 01  14.52711  12 19 39.37   -13 41 30.3   19.0R 55576     608  Cg1214      
2002 02  26.36821  12 15 41.99   -13 52 24.2   19.0R 55576     644  Cg1214      
2002 02  26.38922  12 15 41.76   -13 52 23.6   19.0R 55576     644  Cg1214      
2002 04  04.35942  12 08 58.94   -13 23 27.7   18.9R 55576     608  Cg1214      
2002 04  04.36991  12 08 58.91   -13 23 27.5   18.8R 55576     608  Cg1214      
2002 04  04.38068  12 08 58.75   -13 23 26.9   18.9R 55576     608  Cg1214      
2002 04  05.28544  12 08 48.86   -13 22 27.7   18.9R 55576     644  Cg1214      
2002 04  05.30615  12 08 48.57   -13 22 26.9   18.8R 55576     644  Cg1214      
2002 04  05.33964  12 08 48.26   -13 22 24.3   18.8R 55576     644  Cg1214      
2002 04  08.30202  12 08 16.09   -13 19 07.9   19.5  55576     644  Cf5895      
2002 04  08.32302  12 08 15.85   -13 19 06.6   19.7  55576     644  Cf5895      
2002 04  08.36136  12 08 15.43   -13 19 04.0   19.6  55576     644  Cf5895      
2002 04  08.90336  12 08 09.72   -13 18 27.0         55576     246  Cf5895      
2002 04  08.90463  12 08 09.69   -13 18 27.4         55576     246  Cf5895      
2002 04  08.90855  12 08 09.66   -13 18 26.7         55576     246  Cf5895      
2002 04  08.93091  12 08 09.36   -13 18 26.3         55576     557  Cf5895      
2002 04  08.94910  12 08 09.19   -13 18 24.9         55576     246  Cf5895      
2002 04  08.95329  12 08 09.14   -13 18 23.9         55576     246  Cf5895      
2002 04  08.97625  12 08 08.87   -13 18 22.4   19.4V 55576     493  Cf5895      
2002 04  08.98209  12 08 08.80   -13 18 22.0   19.3V 55576     493  Cf5895      
2002 04  08.99086  12 08 08.71   -13 18 21.4   19.5V 55576     493  Cf5895      
2002 04  08.99390  12 08 08.70   -13 18 21.9   20.2V 55576     557  Cf5895      
2002 04  09.43653  12 08 03.99   -13 17 50.8   20.1  55576     422  Cf5895      
2002 04  09.43821  12 08 03.97   -13 17 50.9   19.9  55576     422  Cf5895      
2002 04  09.47487  12 08 03.56   -13 17 47.6   19.7  55576     422  Cf5895      
2002 04  09.47579  12 08 03.48   -13 17 48.2   20.1  55576     422  Cf5895      
2002 04  10.24943  12 07 55.28   -13 16 57.2   18.7R 55576     649  Cf5895      
2002 04  10.29609  12 07 54.79   -13 16 53.0   18.9R 55576     649  Cf5895      
2002 04  10.58863  12 07 51.89   -13 16 33.7   19.4R 55576     428  Cf5895      
2002 04  14.14276  12 07 14.93   -13 12 29.2   20.5  55576     644  Cf5895      
2002 04  14.16530  12 07 14.67   -13 12 28.5   19.6  55576     644  Cf5895      
2002 04  14.18459  12 07 14.49   -13 12 26.9   19.5  55576     644  Cf5895      
2002 04  15.15510  12 07 04.68   -13 11 19.9   19.4  55576     644  Cf5895      
2002 04  15.18031  12 07 04.43   -13 11 18.2   19.3  55576     644  Cf5895      
2002 04  15.20195  12 07 04.20   -13 11 16.7   20.0  55576     644  Cf5895      
2002 04  15.38348  12 07 02.16   -13 11 02.2   19.2R 55576     474  Cf5895      
2002 04  15.40866  12 07 02.34   -13 11 03.8   19.3R 55576     474  Cf5895      
2002 04  15.42593  12 07 01.91   -13 11 01.4   19.2R 55576     474  Cf5895      
2002 04  15.89300  12 06 57.33   -13 10 28.4         55576     557  Cf5895      
2002 04  15.91854  12 06 56.98   -13 10 26.7         55576     557  Cf5895      
2002 04  15.94182  12 06 56.65   -13 10 25.4         55576     557  Cf5895      
2002 04  16.46266  12 06 51.78   -13 09 50.3         55576     474  Cf5895      
2002 04  16.47709  12 06 51.70   -13 09 50.5         55576     474  Cf5895      
2002 04  17.21231  12 06 44.20   -13 08 57.3   19.2R 55576     711  Cf5895      
2002 04  17.22286  12 06 43.99   -13 08 56.3   20.0  55576     711  Cf5895      
2002 04  17.23255  12 06 43.89   -13 08 57.5   19.6R 55576     448  Cf5895      
2002 04  17.24042  12 06 43.74   -13 08 57.0   19.7R 55576     448  Cf5895      
2002 04  17.24680  12 06 43.82   -13 08 54.9   19.0R 55576     711  Cf5895      
2002 04  17.24826  12 06 43.68   -13 08 57.5   19.5R 55576     448  Cf5895      
2002 04  17.42251  12 06 42.10   -13 08 42.1   19.1R 55576     474  Cf5895      
2002 04  17.45771  12 06 41.73   -13 08 39.5   19.3R 55576     474  Cf5895      
2002 04  23.51166  12 05 44.85   -13 01 39.0         55576     413  Cf5895      
2002 04  23.51489  12 05 44.81   -13 01 38.6         55576     413  Cf5895      
2002 04  23.54375  12 05 44.56   -13 01 36.8         55576     413  Cf5895      
2002 04  23.54697  12 05 44.52   -13 01 36.6         55576     413  Cf5895      
2002 06  01.36472  12 02 19.372  -12 23 53.89  19.4R 55576     568  Cf7372      
2002 06  01.39847  12 02 19.324  -12 23 52.67  19.4R 55576     568  Cf7372      
2003 06  21.17704  12 28 15.16   -16 04 32.2   19.6R 55576     333  Ci1814      
2003 06  22.19681  12 28 17.25   -16 04 04.5   20.0R 55576     333  Ci1814      
2004 03  15.41962  13 08 07.20   -21 19 55.4   18.8  55576     644  Ck1856      
2004 03  15.45162  13 08 06.87   -21 19 54.4   18.9  55576     644  Ck1856      
2004 03  15.48086  13 08 06.57   -21 19 53.6   19.4  55576     644  Ck1856      
2004 04  12.26868  13 02 53.26   -20 59 26.7   20.1  55576     704  Cl0605      
2004 04  13.27642  13 02 41.38   -20 58 23.9   20.7  55576     704  Cl0605      
2004 04  14.24857  13 02 30.22   -20 57 22.9   20.7  55576     704  Cl0605      
2004 04  15.24830  13 02 18.68   -20 56 20.1   20.3  55576     704  Cl0605      
2007 08  15.44060  14 22 30.09   -28 09 43.6   19.5R 55576     413  Cv3454      

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     0.35       0.00     0.52
  2   0.0001      0.00    -0.22       0.00     0.29
  3   7.2685      0.00     0.67       0.00    -0.08
  4   7.2686      0.00     0.03       0.00    -0.40
  5   7.2686      0.00     0.12       0.00     0.09
  6   9.2891      0.00    -0.50       0.00     0.55
  7   9.2893      0.00    -0.49       0.00    -0.27
  8  12.3775      0.00    -0.27       0.00    -0.34
  9  12.3775      0.00     0.08       0.00    -0.54
 10  12.3775      0.00    -0.37       0.00    -0.31
 11  13.3169      0.00    -0.09       0.00    -0.14
 12  13.3169      0.00    -0.10       0.00    -0.34
 13  14.1412      0.00     0.51       0.00    -0.77
 14  14.1412      0.00     0.80       0.00    -1.19
 15  14.1413      0.00     0.48       0.00    -1.32
 16  14.2586      0.00    -0.29       0.00     0.41
 17  14.2586      0.00    -0.66       0.00     0.55
 18  14.3598      0.00    -0.74       0.00     0.78
 19  14.3599      0.00     0.58       0.00     0.30
 20  14.3599      0.00     0.00       0.00     0.21
 21  14.3624      0.00     0.75       0.00     0.40
 22  14.3624      0.00    -0.13       0.00    -0.16
 23  14.3625      0.00     0.83       0.00     0.23
 24  14.3706      0.00     0.22       0.00     0.00
 25  14.3707      0.00     0.07       0.00    -0.11
 26  14.3708      0.00     0.07       0.00    -0.10
 27  14.3723      0.00     1.22       0.00     0.58
 28  14.3723      0.00     0.97       0.00     0.09
 29  14.3723      0.00     1.16       0.00     0.53
 30  14.3724      0.00     0.31       0.00    -0.57
 31  14.3724      0.00     0.72       0.00    -0.41
 32  14.3724      0.00     0.65       0.00     0.31
 33  14.3725      0.00     0.23       0.00     0.20
 34  14.3725      0.00     0.13       0.00     0.20
 35  14.3725      0.00     0.21       0.00     0.21
 36  14.3725      0.00     0.66       0.00    -0.43
 37  14.3737      0.00     0.30       0.00     0.06
 38  14.3737      0.00     0.27       0.00    -0.16
 39  14.3738      0.00     0.09       0.00     0.68
 40  14.3738      0.00    -0.96       0.00     0.02
 41  14.3760      0.00    -0.56       0.00    -0.69
 42  14.3761      0.00    -0.37       0.00     0.33
 43  14.3769      0.00 (   2.43)      0.00 (  -0.88)
 44  14.3866      0.00     0.35       0.00     0.63
 45  14.3867      0.00    -0.04       0.00    -0.21
 46  14.3867      0.00     0.26       0.00     0.07
 47  14.3894      0.00     0.50       0.00     0.00
 48  14.3895      0.00     0.63       0.00    -0.03
 49  14.3895      0.00     0.51       0.00    -0.02
 50  14.3900      0.00 (  -2.72)      0.00 (   1.15)
 51  14.3901      0.00 (   3.84)      0.00 (  -2.18)
 52  14.3901      0.00     0.04       0.00    -0.98
 53  14.3914      0.00     1.62       0.00     0.54
 54  14.3915      0.00     0.27       0.00     0.47
 55  14.3915      0.00    -1.14       0.00     0.15
 56  14.3930      0.00 (   3.46)      0.00 (  -1.72)
 57  14.3930      0.00 (   4.45)      0.00 (  -2.92)
 58  14.3950      0.00     0.78       0.00    -0.02
 59  14.3951      0.00    -0.77       0.00     0.25
 60  14.3951      0.00    -0.84       0.00    -1.61
 61  14.3951      0.00 (  -1.90)      0.00 (  -1.66)
 62  14.3951      0.00     0.29       0.00    -0.02
 63  14.3951      0.00 (  -1.62)      0.00 (  -2.70)
 64  14.3956      0.00     0.17       0.00    -0.16
 65  14.3957      0.00    -0.10       0.00     0.00
 66  14.4123      0.00     0.07       0.00    -0.01
 67  14.4123      0.00    -0.09       0.00     0.17
 68  14.4124      0.00     0.14       0.00    -0.03
 69  14.4124      0.00    -0.01       0.00    -0.06
 70  14.5186      0.00    -0.51       0.00    -0.12
 71  14.5187      0.00    -0.64       0.00    -0.27
 72  15.5722      0.00     0.70       0.00     0.74
 73  15.5750      0.00    -1.32       0.00     0.11
 74  16.3066      0.00     0.28       0.00    -0.21
 75  16.3067      0.00     0.36       0.00     0.01
 76  16.3068      0.00     0.45       0.00     0.10
 77  16.3829      0.00 (   2.51)      0.00 (  -1.19)
 78  16.3856      0.00    -0.75       0.00    -0.43
 79  16.3883      0.00     0.00       0.00    -0.17
 80  16.3910      0.00    -0.67       0.00    -0.71
 81  19.7235      0.00    -0.18       0.00     0.24

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.

55576    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        24.913    24.912    24.913
ecceobj         0.390     0.390     0.391
incobj         13.349    13.349    13.349
qmin           14.843    14.897    14.858
qmax           35.905    35.923    35.840
amean          25.138    25.139    24.982
amin           24.550    24.377    24.267
amax           25.587    25.553    25.501
emean           0.400     0.390     0.397
emin            0.391     0.356     0.386
emax            0.406     0.406     0.405
imean          14.101    14.660    14.272
imin           13.632    13.646    13.918
imax           14.762    16.218    14.762
excite_mean     0.468     0.465     0.467
fracstop        0.005     0.008     0.004
cjmean          2.821     2.825     2.824

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       265.5     286.0     262.8
kozaiamp         26.4      41.9      23.7