Orbit Fit and Astrometric record for 15820

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: 15820     
# Created Tue Oct 24 01:36:15 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting  113 observations of  123
# Arc:  13.91y
# First observation: 1994/10/02
#  Last observation: 2008/08/28
# Chi-squared of fit:  1833.45 DOF:  220 RMS:  0.71
# Min/Max residuals:    -1.90    2.30
# Exact a, adot, b, bdot, g, gdot:
  1.611348E-05  3.879513E-02 -6.201635E-06  6.995656E-03  3.297820E-02 -1.033074E-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
    7.025357   -9.454485   -0.322028    0.115989   -0.941394  2449627.746608
# Heliocentric elements and errors
Epoch:              2449628.5000  =  1994/10/03
Mean Anomaly:          324.72024 +/-     0.000
Argument of Peri:       98.79111 +/-     0.000
Long of Asc Node:      317.36140 +/-     0.000
Inclination:            12.12923 +/-     0.000
Eccentricity:         0.31525234 +/-    0.0000
Semi-Major Axis:     39.44320652 +/-    0.0000
Time of Perihelion: 2458495.5636 +/-       0.0
Perihelion:          27.00864346 +/-    0.0000
Aphelion:            51.87776958 +/-    0.0000
Period (y)              247.7231 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           30.67560794 +/-    0.0000
Ecliptic Y           -4.78846433 +/-    0.0000
Ecliptic Z            3.70861641 +/-    0.0000
Ecliptic XDOT        -0.00037435 +/-    0.0000
Ecliptic YDOT         0.00332611 +/-    0.0000
Ecliptic ZDOT         0.00047136 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   31.26795646 +/-    0.0000
Geocenter to KBO     30.32324715 +/-    0.0000
# Hcoef:  7.24

The following table shows the complete astrometric record for 15820. 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 (15820) followed by the observatory code and reference code for the source of the astrometry.

1994 10  02.2459   23 14 12.85   +02 42 53.6   21.5R 15820     568  C24781      
1994 10  02.2730   23 14 12.72   +02 42 52.9         15820     568  C24781      
1994 10  02.3127   23 14 12.48   +02 42 51.4         15820     568  C24781      
1994 10  02.4510   23 14 11.74   +02 42 46.3         15820     568  C24781      
1994 10  02.4573   23 14 11.67   +02 42 45.7         15820     568  C24781      
1994 10  02.4633   23 14 11.65   +02 42 45.8         15820     568  C24781      
1994 10  03.2377   23 14 07.55   +02 42 17.4         15820     568  C24781      
1994 10  03.5325   23 14 05.93   +02 42 06.8         15820     568  C24781      
1994 10  03.5388   23 14 05.92   +02 42 06.7         15820     568  C24781      
1994 10  13.20428  23 13 16.84   +02 36 28.3   22.5V 15820     689  C24821      
1994 10  13.21679  23 13 16.77   +02 36 27.6   22.5V 15820     689  C24821      
1994 10  13.22905  23 13 16.69   +02 36 27.3   22.6V 15820     689  C24821      
1994 10  13.24121  23 13 16.66   +02 36 26.9   22.5V 15820     689  C24821      
1994 10  28.16547  23 12 14.18   +02 28 30.3   22.8V 15820     689  C24821      
1994 10  28.19734  23 12 14.06   +02 28 29.2   22.6V 15820     689  C24821      
1994 11  01.2576   23 12 00.69   +02 26 33.5   23. R 15820     568  C24813      
1994 11  01.3372   23 12 00.43   +02 26 30.8         15820     568  C24813      
1994 11  07.9015   23 11 41.91   +02 23 40.1   21.7R 15820     950  C24881      
1994 11  07.9554   23 11 41.76   +02 23 38.8         15820     950  C24881      
1994 11  07.9960   23 11 41.66   +02 23 37.9         15820     950  C24881      
1995 06  22.448    23 28 50.17   +04 22 56.0         15820     675  C25381      
1995 06  23.449    23 28 50.27   +04 23 16.8         15820     675  C25381      
1995 06  24.436    23 28 50.28   +04 23 35.6         15820     675  C25381      
1995 06  25.443    23 28 50.15   +04 23 53.5         15820     675  C25381      
1995 07  27.0317   23 27 49.81   +04 26 53.2   21.6R 15820     598  C26494      
1995 07  28.0510   23 27 46.07   +04 26 47.5   22.1V 15820     598  C26494      
1995 08  27.07936  23 25 23.20   +04 18 01.3         15820     950  C25622      
1995 08  27.20140  23 25 22.54   +04 17 58.0         15820     950  C25622      
1995 09  01.58199  23 24 52.15   +04 15 28.6         15820     568  C26491      
1995 10  21.49800  23 20 16.29   +03 46 46.9         15820     413  C26037      
1995 10  21.56180  23 20 16.04   +03 46 45.0         15820     413  C26037      
1995 10  21.58218  23 20 15.94   +03 46 44.2         15820     413  C26037      
1995 10  21.59476  23 20 15.86   +03 46 44.1         15820     413  C26037      
1995 10  24.18740  23 20 04.63   +03 45 20.7         15820     709  C26116      
1995 10  24.22580  23 20 04.46   +03 45 20.5         15820     709  C26116      
1995 10  25.13654  23 20 00.80   +03 44 47.7   21.9V 15820     709  C26116      
1995 10  25.17957  23 20 00.72   +03 44 47.3   21.9V 15820     709  C26116      
1995 10  25.22263  23 20 00.48   +03 44 45.8   21.6V 15820     709  C26116      
1995 10  25.26569  23 20 00.28   +03 44 44.2   21.0V 15820     709  C26116      
1995 11  16.09415  23 18 55.75   +03 34 41.5   21.1V 15820     709  C26116      
1995 11  16.13721  23 18 55.62   +03 34 38.8   21.4V 15820     709  C26116      
1995 11  16.18027  23 18 55.64   +03 34 38.4   21.5V 15820     709  C26116      
1995 11  16.22332  23 18 55.41   +03 34 37.9   21.5V 15820     709  C26116      
1995 11  17.08491  23 18 53.95   +03 34 18.1   21.4V 15820     709  C26116      
1995 11  17.12794  23 18 53.97   +03 34 17.7   21.0V 15820     709  C26116      
1995 11  17.17100  23 18 53.68   +03 34 16.2   21.3V 15820     709  C26116      
1995 11  17.21406  23 18 53.92   +03 34 17.0   21.9V 15820     709  C26116      
1996 07  13.36385  23 36 12.68   +05 42 12.2         15820     711  C27669      
1996 07  13.38804  23 36 12.61   +05 42 12.7         15820     711  C27669      
1996 07  13.42573  23 36 12.54   +05 42 13.0         15820     711  C27669      
1996 07  13.43455  23 36 12.54   +05 42 12.0         15820     711  C27669      
1996 07  13.44206  23 36 12.48   +05 42 12.7         15820     711  C27669      
1996 09  04.98403  23 32 19.67   +05 29 52.6         15820     950  C28270      
1996 09  05.11528  23 32 18.87   +05 29 48.7         15820     950  C28270      
1996 09  06.95309  23 32 08.04   +05 28 51.7         15820     950  C28270      
1996 09  07.14131  23 32 06.84   +05 28 46.3         15820     950  C28270      
1996 09  10.20805  23 31 48.64   +05 27 07.4         15820     711  C27868      
1996 09  10.21730  23 31 48.59   +05 27 07.2         15820     711  C27868      
1996 09  10.22516  23 31 48.52   +05 27 07.0         15820     711  C27868      
1996 09  10.23325  23 31 48.48   +05 27 06.6         15820     711  C27868      
1996 09  10.28142  23 31 48.18   +05 27 04.9         15820     711  C27868      
1996 09  10.29015  23 31 48.16   +05 27 04.7         15820     711  C27868      
1996 09  15.91634  23 31 14.27   +05 23 56.9         15820     950  C28050      
1996 09  15.94804  23 31 14.08   +05 23 56.0         15820     950  C28050      
1996 09  15.97308  23 31 13.95   +05 23 55.0         15820     950  C28050      
1996 09  21.30645  23 30 41.99   +05 20 47.6         15820     696  C27866      
1996 09  21.31384  23 30 41.96   +05 20 47.4   22.5R 15820     696  C27866      
1996 09  21.32131  23 30 41.89   +05 20 47.5   22.6R 15820     696  C27866      
1996 09  21.32868  23 30 41.83   +05 20 47.2         15820     696  C27866      
1996 09  21.40806  23 30 41.44   +05 20 43.9         15820     696  C27866      
1996 09  21.41552  23 30 41.37   +05 20 43.9         15820     696  C27866      
1996 10  12.17251  23 28 44.64   +05 08 02.1   22.4V 15820     691  Cb3475      
1996 10  12.19386  23 28 44.52   +05 07 59.4         15820     691  Cb3475      
1996 10  12.21512  23 28 44.40   +05 07 58.6   22.0V 15820     691  Cb3475      
1997 07  11.39279  23 44 12.71   +06 57 48.1         15820     696  C30195      
1997 07  12.39326  23 44 11.06   +06 57 57.3         15820     696  C30195      
1997 09  06.96505  23 40 12.66   +06 46 37.6   22.2R 15820     950  C30629      
1997 09  07.00791  23 40 12.42   +06 46 36.3         15820     950  C30629      
1997 09  07.18564  23 40 11.35   +06 46 30.8         15820     950  C30629      
1997 09  07.21435  23 40 11.17   +06 46 30.1         15820     950  C30629      
1997 09  10.01360  23 39 54.47   +06 45 02.7   22.2R 15820     950  C30629      
1997 09  10.04862  23 39 54.27   +06 45 01.2         15820     950  C30629      
1997 09  11.05709  23 39 48.20   +06 44 29.3         15820     950  C30629      
1997 09  11.08053  23 39 48.05   +06 44 28.5         15820     950  C30629      
1997 09  11.09755  23 39 47.92   +06 44 28.4         15820     950  C30629      
1997 09  11.17910  23 39 47.44   +06 44 25.5         15820     950  C30629      
1997 09  11.19622  23 39 47.34   +06 44 24.9         15820     950  C30629      
1997 09  23.30576  23 38 34.24   +06 37 29.4         15820     568  Ca0007      
1997 09  23.36219  23 38 33.87   +06 37 27.0         15820     568  Ca0007      
1997 10  30.90164  23 35 18.01   +06 14 25.6         15820     950  Ca0100      
1997 10  30.93003  23 35 17.87   +06 14 24.5         15820     950  Ca0100      
1997 10  30.94856  23 35 17.77   +06 14 24.0         15820     950  Ca0100      
1999 09  17.90942  23 55 52.70   +09 19 29.1         15820     950  Ca6005      
1999 09  17.92265  23 55 52.64   +09 19 29.1         15820     950  Ca6005      
1999 09  17.92955  23 55 52.58   +09 19 28.6         15820     950  Ca6005      
1999 10  31.17192  23 51 48.43   +08 52 09.6   22.3R 15820     688  Ca7254      
1999 10  31.26007  23 51 48.05   +08 52 06.9         15820     688  Ca7254      
2000 09  05.15896  00 05 45.82   +10 45 46.8         15820     309  Cc9195      
2000 09  05.16634  00 05 45.78   +10 45 46.8         15820     309  Cc9195      
2000 09  05.17398  00 05 45.73   +10 45 46.6         15820     309  Cc9195      
2000 09  05.17824  00 05 45.72   +10 45 46.5         15820     309  Cc9195      
2000 09  05.18241  00 05 45.68   +10 45 46.3         15820     309  Cc9195      
2000 09  05.34171  00 05 44.74   +10 45 42.1   21.9R 15820     309  Cc9195      
2000 09  05.34667  00 05 44.71   +10 45 42.0   23.7  15820     309  Cc9195      
2000 09  05.35259  00 05 44.67   +10 45 41.8   22.6V 15820     309  Cc9195      
2000 09  05.35582  00 05 44.66   +10 45 41.8   21.3I 15820     309  Cc9195      
2000 09  05.35792  00 05 44.66   +10 45 41.7   21.9R 15820     309  Cc9195      
2001 10  12.17567  00 10 52.61   +11 45 41.0   19.0  15820     304  Cf0777      
2001 10  12.19200  00 10 52.50   +11 45 40.7         15820     304  Cf0777      
2004 11  01.02419  00 36 53.69   +15 36 18.2   22.1R 15820     809  Cl8881      
2004 11  01.05886  00 36 53.52   +15 36 16.8   21.8R 15820     809  Cl8881      
2004 11  01.08360  00 36 53.38   +15 36 15.4   22.2R 15820     809  Cl8881      
2008 08  28.21558  01 24 45.56   +21 23 10.5   21.9R 15820     950  C~01lH      
2008 08  28.23566  01 24 45.47   +21 23 10.4   21.7R 15820     950  C~01lH      
2008 08  29.11825  01 24 41.87   +21 23 11.3   21.8R 15820     950  C~01lH      
2008 08  29.13676  01 24 41.79   +21 23 11.3   21.7R 15820     950  C~01lH      
2008 09  27.57185  01 21 59.47   +21 16 52.7   25.4R 15820     250  S~06DV      
2008 09  27.57879  01 21 59.43   +21 16 52.6         15820     250  S~06DV      
2008 09  27.58504  01 21 59.37   +21 16 52.5         15820     250  S~06DV      
2008 09  27.59199  01 21 59.34   +21 16 52.4         15820     250  S~06DV      
2009 01  17.185775 01 14 47.10   +20 13 23.4         15820     645  C~1bXW      
2009 01  17.186609 01 14 47.10   +20 13 23.4         15820     645  C~1bXW      
2009 01  17.189097 01 14 47.11   +20 13 23.3         15820     645  C~1bXW      

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     0.11       0.00    -0.42
  2   0.0001      0.00     0.04       0.00     2.30
  3   0.0002      0.00    -0.28       0.00     2.21
  4   0.0006      0.00     0.06       0.00     2.01
  5   0.0006      0.00    -0.47       0.00     1.64
  6   0.0006      0.00    -0.27       0.00     1.95
  7   0.0027      0.00     0.39       0.00     1.00
  8   0.0035      0.00     0.21       0.00     0.85
  9   0.0035      0.00     0.57       0.00     0.97
 10   0.0300      0.00    -0.09       0.00    -0.44
 11   0.0300      0.00    -0.23       0.00    -0.71
 12   0.0301      0.00    -0.53       0.00    -0.59
 13   0.0301      0.00    -0.09       0.00    -0.58
 14   0.0710      0.00    -0.41       0.00     0.03
 15   0.0711      0.00    -0.47       0.00    -0.13
 16   0.0822      0.00 (   2.58)      0.00 (  -0.20)
 17   0.0824      0.00 (   2.57)      0.00 (  -0.71)
 18   0.1004      0.00     0.02       0.00    -1.33
 19   0.1005      0.00    -0.17       0.00    -1.33
 20   0.1006      0.00    -0.14       0.00    -1.25
 21   0.7206      0.00    -0.65       0.00     0.25
 22   0.7233      0.00    -0.89       0.00     1.11
 23   0.7261      0.00    -0.76       0.00     1.00
 24   0.7288      0.00    -0.96       0.00     0.37
 25   0.8153      0.00     0.57       0.00    -0.73
 26   0.8181      0.00    -0.82       0.00     0.57
 27   0.9003      0.00 (  -5.75)      0.00 (  -0.13)
 28   0.9006      0.00 (  -5.18)      0.00 (  -0.18)
 29   0.9154      0.00    -0.06       0.00     0.80
 30   1.0520      0.00     0.44       0.00    -0.26
 31   1.0522      0.00     0.95       0.00    -0.02
 32   1.0523      0.00     0.81       0.00    -0.13
 33   1.0523      0.00     0.45       0.00     0.19
 34   1.0594      0.00 (  -3.18)      0.00 (   3.09)
 35   1.0595      0.00 (  -3.30)      0.00 (   4.15)
 36   1.0620      0.00 (  -2.46)      0.00 (   1.04)
 37   1.0621      0.00    -0.98       0.00     2.03
 38   1.0622      0.00 (  -1.90)      0.00 (   1.93)
 39   1.0623      0.00 (  -2.23)      0.00 (   1.73)
 40   1.1221      0.00     0.38       0.00     0.95
 41   1.1222      0.00    -0.35       0.00    -0.81
 42   1.1223      0.00     1.17       0.00    -0.28
 43   1.1225      0.00    -1.07       0.00     0.16
 44   1.1248      0.00    -0.81       0.00    -1.16
 45   1.1249      0.00     0.64       0.00    -0.65
 46   1.1251      0.00 (  -2.57)      0.00 (  -1.24)
 47   1.1252      0.00     2.17       0.00     0.48
 48   1.7799      0.00     0.47       0.00    -0.01
 49   1.7800      0.00     0.19       0.00     0.35
 50   1.7801      0.00     0.34       0.00     0.42
 51   1.7801      0.00     0.63       0.00    -0.63
 52   1.7801      0.00    -0.03       0.00     0.02
 53   1.9267      0.00     0.62       0.00     0.60
 54   1.9271      0.00     0.43       0.00     0.68
 55   1.9321      0.00     0.72       0.00     0.24
 56   1.9326      0.00    -0.24       0.00     0.71
 57   1.9410      0.00     0.61       0.00    -0.50
 58   1.9411      0.00     0.70       0.00    -0.40
 59   1.9411      0.00     0.37       0.00    -0.34
 60   1.9411      0.00     0.51       0.00    -0.48
 61   1.9412      0.00     0.40       0.00    -0.62
 62   1.9413      0.00     0.90       0.00    -0.53
 63   1.9567      0.00    -1.39       0.00    -0.14
 64   1.9567      0.00    -1.35       0.00     0.05
 65   1.9568      0.00    -1.01       0.00    -0.09
 66   1.9714      0.00    -1.52       0.00    -0.51
 67   1.9714      0.00    -1.30       0.00    -0.44
 68   1.9715      0.00    -1.67       0.00    -0.08
 69   1.9715      0.00    -1.90       0.00    -0.11
 70   1.9717      0.00    -0.55       0.00    -0.57
 71   1.9717      0.00    -0.93       0.00    -0.31
 72   2.0285      0.00     1.60       0.00     0.89
 73   2.0286      0.00     1.48       0.00    -1.03
 74   2.0287      0.00     1.36       0.00    -1.05
 75   2.7738      0.00     1.33       0.00    -0.46
 76   2.7766      0.00     0.58       0.00    -1.22
 77   2.9315      0.00    -0.04       0.00    -0.39
 78   2.9316      0.00     0.24       0.00    -0.40
 79   2.9321      0.00     0.30       0.00    -0.49
 80   2.9322      0.00     0.19       0.00    -0.31
 81   2.9398      0.00     0.06       0.00    -0.66
 82   2.9399      0.00     0.27       0.00    -1.05
 83   2.9427      0.00     0.06       0.00    -0.75
 84   2.9427      0.00    -0.04       0.00    -0.79
 85   2.9428      0.00    -0.42       0.00    -0.34
 86   2.9430      0.00    -0.15       0.00    -0.61
 87   2.9431      0.00    -0.09       0.00    -0.66
 88   2.9762      0.00     0.34       0.00    -0.48
 89   2.9764      0.00    -0.03       0.00    -0.85
 90   3.0791      0.00     0.26       0.00     0.11
 91   3.0792      0.00    -0.12       0.00    -0.04
 92   3.0793      0.00    -0.50       0.00     0.09
 93   4.9601      0.00     0.93       0.00     0.57
 94   4.9601      0.00     1.27       0.00     1.01
 95   4.9601      0.00     1.01       0.00     0.74
 96   5.0785      0.00    -0.06       0.00    -0.47
 97   5.0788      0.00     0.21       0.00     0.11
 98   5.9272      0.00     0.14       0.00    -0.16
 99   5.9272      0.00     0.20       0.00     0.03
100   5.9273      0.00     0.13       0.00     0.02
101   5.9273      0.00     0.36       0.00     0.03
102   5.9273      0.00     0.13       0.00    -0.06
103   5.9277      0.00     0.25       0.00    -0.11
104   5.9277      0.00     0.24       0.00    -0.08
105   5.9277      0.00     0.17       0.00    -0.13
106   5.9277      0.00     0.30       0.00    -0.04
107   5.9278      0.00     0.49       0.00    -0.09
108   7.0279      0.00     0.79       0.00    -0.62
109   7.0279      0.00     0.65       0.00    -0.26
110  10.0829      0.00    -0.41       0.00    -0.16
111  10.0830      0.00    -0.02       0.00    -0.09
112  10.0831      0.00    -0.02       0.00    -0.44
113  13.9055      0.00     0.21       0.00     0.02
114  13.9055      0.00     0.12       0.00    -0.10
115  13.9079      0.00     0.26       0.00     0.36
116  13.9080      0.00     0.25       0.00     0.36
117  13.9886      0.00    -0.25       0.00     0.25
118  13.9886      0.00    -0.17       0.00     0.33
119  13.9886      0.00    -0.45       0.00     0.38
120  13.9886      0.00    -0.22       0.00     0.46
121  14.2942      0.00    -0.39       0.00     0.57
122  14.2942      0.00    -0.43       0.00     0.58
123  14.2942      0.00    -0.38       0.00     0.50

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.

15820    quality flag:3

Type:           3:2E      3:2E      3:2E

axisobj        39.903    39.903    39.903
ecceobj         0.323     0.323     0.323
incobj         12.131    12.131    12.131
qmin           26.665    26.665    26.665
qmax           52.799    52.799    52.800
amean          39.454    39.454    39.454
amin           39.058    39.055    39.062
amax           39.927    39.926    39.930
emean           0.258     0.258     0.258
emin            0.173     0.173     0.173
emax            0.323     0.323     0.323
imean          16.986    16.985    16.988
imin           13.513    13.513    13.513
imax           20.448    20.450    20.445
excite_mean     0.393     0.393     0.393
fracstop        1.000     1.000     1.000
cjmean          2.875     2.875     2.875

libcent 0       180.6     180.1     180.8
libamp  0        56.6      56.1      56.7
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        97.4      97.4      97.5
kozaiamp         74.9      74.8      74.9