Orbit Fit and Astrometric record for 65489

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: 65489     
# Created Fri Nov 28 02:36:36 2014
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   80 observations of   80
# Arc:  25.29y
# First observation: 1987/01/31
#  Last observation: 2012/05/18
# Chi-squared of fit:   523.95 DOF:  154 RMS:  0.45
# Min/Max residuals:    -1.85    1.68
# Exact a, adot, b, bdot, g, gdot:
  3.192720E-05  1.119291E-01  8.989365E-06  2.472800E-02  5.811114E-02 -1.642261E-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
  -19.397553  117.000588   -0.244254   -0.319202   -0.906587  2446827.018669
# Heliocentric elements and errors
Epoch:              2446826.5000  =  1987/01/31
Mean Anomaly:          359.10815 +/-     0.000
Argument of Peri:      319.61946 +/-     0.000
Long of Asc Node:      171.92825 +/-     0.000
Inclination:            22.31299 +/-     0.000
Eccentricity:         0.82191667 +/-    0.0000
Semi-Major Axis:     99.97412873 +/-    0.0000
Time of Perihelion: 2447731.0206 +/-       0.0
Perihelion:          17.80372561 +/-    0.0000
Aphelion:           182.14453185 +/-    0.0000
Period (y)              999.6308 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           -8.01963574 +/-    0.0000
Ecliptic Y           15.20262681 +/-    0.0000
Ecliptic Z           -5.71513731 +/-    0.0000
Ecliptic XDOT        -0.00454146 +/-    0.0000
Ecliptic YDOT        -0.00269263 +/-    0.0000
Ecliptic ZDOT         0.00135580 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   18.11352080 +/-    0.0000
Geocenter to KBO     17.20851669 +/-    0.0000
# Hcoef:  6.22

The following table shows the complete astrometric record for 65489. 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 (65489) followed by the observatory code and reference code for the source of the astrometry.

1987 01  31.51803  07 41 28.11   +01 41 43.7         65489     260   i0218      
1987 01  31.58747  07 41 27.48   +01 41 48.2         65489     260   i0218      
1988 03  10.42051  08 03 29.59   +02 40 08.3         65489     260   i0218      
1988 03  10.48996  08 03 29.24   +02 40 12.7         65489     260   i0218      
1991 02  06.30417  09 28 59.61   +02 29 50.6         65489     261   i0218      
1991 02  06.36319  09 28 59.12   +02 29 54.1         65489     261   i0218      
1995 02  26.29375  11 07 39.36   +02 57 14.4         65489     261   i0218      
1995 02  26.35625  11 07 38.89   +02 57 18.9         65489     261   i0218      
1996 04  10.16806  11 24 37.72   +03 44 47.6         65489     261   i0218      
1996 04  10.21667  11 24 37.36   +03 44 51.0         65489     261   i0218      
1996 04  20.42136  11 23 38.33   +03 54 52.6   20.0R 65489     566  Ci0218      
1998 04  30.26042  12 03 37.11   +03 48 18.9         65489     261   i0218      
1998 04  30.30556  12 03 36.89   +03 48 21.2         65489     261   i0218      
2001 03  27.55243  12 59 18.55   +02 50 52.6         65489     608  Ci0218      
2002 03  23.46414  13 14 47.01   +02 37 29.1   19.9R 65489     608  Ci0218      
2002 04  02.51440  13 13 38.77   +02 47 31.6   20.3R 65489     644  Ci0218      
2002 04  13.24827  13 12 23.77   +02 57 35.4   20.0  65489     644  Ci1844      
2002 04  13.26955  13 12 23.62   +02 57 36.0   20.4  65489     644  Ci1844      
2002 04  13.28957  13 12 23.50   +02 57 37.3   20.2  65489     644  Ci1844      
2002 04  18.50912  13 11 47.21   +03 02 08.2   19.9R 65489     608  Ci0218      
2002 05  07.16927  13 09 46.76   +03 15 38.7   20.2R 65489     644  Ci0218      
2002 05  07.18944  13 09 46.66   +03 15 39.7   20.1R 65489     644  Ci0218      
2002 05  07.21064  13 09 46.46   +03 15 40.3   20.1R 65489     644  Ci0218      
2002 05  09.44046  13 09 33.59   +03 16 58.8         65489     608  Ci0218      
2002 05  16.33147  13 08 56.42   +03 20 27.6   19.4R 65489     608  Ci0218      
2003 03  22.27735  13 28 52.17   +02 27 11.2   20.0  65489     644  Ch8428      
2003 03  22.36260  13 28 51.57   +02 27 16.4   20.0  65489     644  Ch8428      
2003 03  22.42846  13 28 51.27   +02 27 19.8   20.3  65489     644  Ch8428      
2003 04  02.24127  13 27 41.36   +02 37 50.6   19.8R 65489     675  Ch8428      
2003 04  02.28499  13 27 41.07   +02 37 52.4   19.6R 65489     675  Ch8428      
2003 04  25.22373  13 25 05.20   +02 57 35.6   19.5R 65489     675  Ch8428      
2003 04  25.29333  13 25 04.72   +02 57 38.9   19.6R 65489     675  Ch8428      
2003 05  03.84534  13 24 09.40   +03 03 33.2   19.9R 65489     540  Ch8428      
2003 05  03.90691  13 24 08.99   +03 03 36.3         65489     246  Ch8428      
2003 05  03.90976  13 24 09.02   +03 03 36.2         65489     246  Ch8428      
2003 05  03.91203  13 24 09.01   +03 03 35.4         65489     246  Ch8428      
2003 05  03.91556  13 24 09.00   +03 03 35.3         65489     246  Ch8428      
2003 05  03.91706  13 24 08.94   +03 03 36.5         65489     246  Ch8428      
2003 05  03.91977  13 24 08.93   +03 03 36.0         65489     246  Ch8428      
2003 05  03.94169  13 24 08.75   +03 03 37.0   20.1R 65489     540  Ch8428      
2003 05  05.50991  13 23 59.06   +03 04 36.7   20.3V 65489     360  Ci0218      
2003 05  05.56975  13 23 58.71   +03 04 38.9         65489     360  Ci0218      
2003 05  05.57994  13 23 58.64   +03 04 39.3         65489     360  Ci0218      
2003 05  09.97126  13 23 32.24   +03 07 11.5   19.8R 65489     J87  Ci0218      
2003 05  09.98927  13 23 32.23   +03 07 11.7   19.9R 65489     J87  Ci0218      
2003 05  10.02432  13 23 31.99   +03 07 14.0   20.2R 65489     J87  Ci0218      
2003 05  31.19729  13 21 47.83   +03 15 19.6   20.2R 65489     675  Ci1844      
2003 05  31.24691  13 21 47.64   +03 15 20.3   20.2R 65489     675  Ci1844      
2003 06  21.21134  13 20 54.47   +03 16 04.9   20.6R 65489     333  Ci1844      
2003 06  22.21385  13 20 53.25   +03 15 56.7   20.5R 65489     333  Ci1844      
2004 03  17.06315  13 42 15.92   +02 14 08.4   20. R 65489     621  Ck2806      
2004 03  17.07482  13 42 15.87   +02 14 09.3         65489     621  Ck2806      
2004 03  17.08652  13 42 15.78   +02 14 09.6         65489     621  Ck2806      
2004 03  18.06056  13 42 10.42   +02 15 05.0         65489     621  Ck2806      
2004 05  27.12053  13 35 02.33   +03 04 36.5   19.8R 65489     304  Ck8913      
2004 05  27.17102  13 35 02.10   +03 04 37.3         65489     304  Ck8913      
2006 05  02.94816  14 00 58.68   +02 34 32.2   21. R 65489     621  Cr1538      
2006 05  02.96091  14 00 58.56   +02 34 32.7         65489     621  Cr1538      
2006 05  05.01022  14 00 45.72   +02 35 44.4   21. R 65489     621  Cr1538      
2011 05  09.24529  14 47 41.772  +01 56 51.41        65489     309  C~0X4K      
2011 05  09.24704  14 47 41.756  +01 56 51.38        65489     309  C~0X4K      
2011 05  09.24877  14 47 41.747  +01 56 51.48        65489     309  C~0X4K      
2011 05  09.25094  14 47 41.729  +01 56 51.58        65489     309  C~0X4K      
2011 05  09.25272  14 47 41.718  +01 56 51.63        65489     309  C~0X4K      
2011 05  09.25450  14 47 41.705  +01 56 51.69        65489     309  C~0X4K      
2011 05  09.25729  14 47 41.688  +01 56 51.81        65489     309  C~0X4K      
2011 05  09.26012  14 47 41.672  +01 56 51.88        65489     309  C~0X4K      
2011 05  09.26293  14 47 41.650  +01 56 51.90        65489     309  C~0X4K      
2011 05  09.26575  14 47 41.640  +01 56 52.05        65489     309  C~0X4K      
2011 05  09.26858  14 47 41.618  +01 56 52.08        65489     309  C~0X4K      
2011 05  09.27122  14 47 41.619  +01 56 52.14        65489     309  C~0X4K      
2011 05  09.27296  14 47 41.603  +01 56 52.14        65489     309  C~0X4K      
2011 05  09.27471  14 47 41.594  +01 56 52.23        65489     309  C~0X4K      
2011 05  09.27740  14 47 41.562  +01 56 52.20        65489     309  C~0X4K      
2011 05  09.28034  14 47 41.547  +01 56 52.24        65489     309  C~0X4K      
2011 05  09.28329  14 47 41.529  +01 56 52.45        65489     309  C~0X4K      
2011 05  09.28623  14 47 41.523  +01 56 52.44        65489     309  C~0X4K      
2012 05  18.36776  14 54 37.653  +01 53 43.01  21.8w 65489     F51  C~0h3P      
2012 05  18.38135  14 54 37.560  +01 53 43.44  21.7w 65489     F51  C~0h3P      
2012 05  18.39497  14 54 37.503  +01 53 43.67  21.7w 65489     F51  C~0h3P      

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     0.89
  2   0.0002      0.00    -0.37       0.00     0.21
  3   1.1058      0.00     0.68       0.00     0.44
  4   1.1060      0.00     0.03       0.00    -0.47
  5   4.0158      0.00     0.38       0.00     0.27
  6   4.0160      0.00     1.13       0.00     0.03
  7   8.0706      0.00    -0.90       0.00    -0.25
  8   8.0707      0.00    -0.23       0.00    -0.30
  9   9.1900      0.00    -0.15       0.00     0.05
 10   9.1901      0.00    -0.79       0.00     0.40
 11   9.2181      0.00     0.16       0.00     0.00
 12  11.2436      0.00    -0.05       0.00    -0.56
 13  11.2438      0.00     0.26       0.00    -0.28
 14  14.1520      0.00     0.00       0.00     0.26
 15  15.1402      0.00    -0.14       0.00    -0.24
 16  15.1677      0.00    -0.53       0.00    -0.16
 17  15.1971      0.00     0.24       0.00     0.33
 18  15.1971      0.00     0.26       0.00    -0.21
 19  15.1972      0.00     0.60       0.00     0.01
 20  15.2115      0.00     0.00       0.00    -0.45
 21  15.2626      0.00    -0.05       0.00    -0.39
 22  15.2626      0.00     0.26       0.00    -0.11
 23  15.2627      0.00    -0.83       0.00    -0.27
 24  15.2688      0.00     0.00       0.00     0.64
 25  15.2876      0.00    -0.48       0.00    -0.88
 26  16.1362      0.00     0.93       0.00     0.41
 27  16.1365      0.00    -0.04       0.00     0.56
 28  16.1366      0.00     1.68       0.00     0.05
 29  16.1663      0.00     0.31       0.00     0.45
 30  16.1664      0.00     0.41       0.00    -0.24
 31  16.2292      0.00     0.49       0.00     0.22
 32  16.2294      0.00     0.36       0.00     0.41
 33  16.2528      0.00     0.26       0.00    -0.30
 34  16.2529      0.00    -0.03       0.00     0.45
 35  16.2530      0.00     0.69       0.00     0.24
 36  16.2530      0.00     0.76       0.00    -0.64
 37  16.2530      0.00     0.95       0.00    -0.88
 38  16.2530      0.00     0.19       0.00     0.26
 39  16.2530      0.00     0.30       0.00    -0.34
 40  16.2530      0.00    -0.31       0.00    -0.18
 41  16.2573      0.00     0.05       0.00     0.78
 42  16.2575      0.00     0.43       0.00     0.78
 43  16.2575      0.00     0.34       0.00     0.80
 44  16.2696      0.00    -0.16       0.00     0.16
 45  16.2696      0.00     1.30       0.00    -0.23
 46  16.2697      0.00     0.83       0.00     0.92
 47  16.3277      0.00    -0.09       0.00    -0.21
 48  16.3278      0.00     0.01       0.00    -0.14
 49  16.3852      0.00    -0.04       0.00    -0.34
 50  16.3879      0.00    -1.85       0.00     0.20
 51  17.1240      0.00    -0.37       0.00    -0.19
 52  17.1240      0.00    -0.14       0.00     0.04
 53  17.1241      0.00    -0.51       0.00    -0.33
 54  17.1267      0.00    -0.18       0.00    -1.02
 55  17.3186      0.00    -0.21       0.00    -0.21
 56  17.3187      0.00    -0.16       0.00    -0.22
 57  19.2510      0.00    -0.11       0.00    -0.29
 58  19.2510      0.00    -0.68       0.00    -0.25
 59  19.2567      0.00    -0.59       0.00    -1.19
 60  24.2676      0.00     0.23       0.00     0.10
 61  24.2676      0.00     0.14       0.00     0.02
 62  24.2676      0.00     0.16       0.00     0.07
 63  24.2676      0.00     0.08       0.00     0.11
 64  24.2676      0.00     0.08       0.00     0.11
 65  24.2676      0.00     0.04       0.00     0.12
 66  24.2676      0.00     0.03       0.00     0.16
 67  24.2676      0.00     0.04       0.00     0.15
 68  24.2676      0.00    -0.04       0.00     0.09
 69  24.2676      0.00     0.06       0.00     0.16
 70  24.2676      0.00    -0.02       0.00     0.11
 71  24.2676      0.00     0.23       0.00     0.09
 72  24.2676      0.00     0.14       0.00     0.04
 73  24.2676      0.00     0.16       0.00     0.08
 74  24.2677      0.00    -0.08       0.00    -0.03
 75  24.2677      0.00    -0.05       0.00    -0.07
 76  24.2677      0.00    -0.06       0.00     0.06
 77  24.2677      0.00     0.11       0.00    -0.04
 78  25.2946      0.00     0.11       0.00    -0.32
 79  25.2946      0.00    -0.13       0.00    -0.18
 80  25.2947      0.00     0.17       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.

65489    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        99.691    99.695    99.688
ecceobj         0.822     0.822     0.822
incobj         22.328    22.328    22.328
qmin           17.182    17.205    17.182
qmax          195.286   190.963   190.919
amean         100.941   100.405   100.672
amin           95.869    98.215    99.363
amax          106.553   104.385   104.363
emean           0.824     0.823     0.823
emin            0.813     0.815     0.817
emax            0.834     0.830     0.829
imean          21.470    21.521    21.492
imin           21.018    21.143    21.205
imax           21.803    21.812    21.789
excite_mean     0.902     0.901     0.901
fracstop        0.024     0.014     0.011
cjmean          2.237     2.239     2.239

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       323.4     321.7     321.0
kozaiamp          4.3       2.7       1.9