Orbit Fit and Astrometric record for 03QY90

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: 03QY90    
# Created Thu Oct 19 01:37:23 2017
# Orbit generated from Bernstein formalism
# Fitting   45 observations of   45
# Arc:   8.10y
# First observation: 2000/08/27
#  Last observation: 2008/10/02
Preliminary a, adot, b, bdot, g, gdot:
  -0.000596   0.020752   0.000056  -0.001104   0.021970   0.000000
# Chi-squared of fit:   691.51 DOF:   84 RMS:  0.69
# Min/Max residuals:    -5.87    0.96
# Exact a, adot, b, bdot, g, gdot:
  1.276083E-05  2.072004E-02 -1.054001E-06 -1.098517E-03  2.273144E-02 -3.126648E-05
# Covariance matrix:
  6.7887E-13 -2.9155E-13 -2.7192E-14  1.3563E-14 -7.4758E-14 -1.3338E-12
 -2.9155E-13  1.5011E-13  1.5666E-14 -7.6955E-15  2.8702E-14  7.5812E-13
 -2.7192E-14  1.5666E-14  2.2926E-13 -4.2614E-14  1.8106E-15  8.4603E-14
  1.3563E-14 -7.6955E-15 -4.2614E-14  9.3815E-15 -1.4205E-15 -4.1382E-14
 -7.4758E-14  2.8702E-14  1.8106E-15 -1.4205E-15  6.7605E-14  1.3366E-13
 -1.3338E-12  7.5812E-13  8.4603E-14 -4.1382E-14  1.3366E-13  4.0788E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
   -2.300732  -39.489679   -0.229765   -0.039540   -0.979891  2451783.533043
# Heliocentric elements and errors
Epoch:              2451780.5000  =  2000/08/24
Mean Anomaly:          179.85875 +/-     0.104
Argument of Peri:       36.76525 +/-     0.103
Long of Asc Node:      104.22504 +/-     0.003
Inclination:             3.77220 +/-     0.000
Eccentricity:         0.05116044 +/-    0.0000
Semi-Major Axis:     42.78515108 +/-    0.0019
Time of Perihelion: 2502930.8606 +/-      29.2
Perihelion:          40.59624402 +/-    0.0025
Aphelion:            44.97405814 +/-    0.0027
Period (y)              279.8645 +/-      0.02
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           34.83185079 +/-    0.0004
Ecliptic Y          -28.39522048 +/-    0.0003
Ecliptic Z           -1.76608804 +/-    0.0000
Ecliptic XDOT         0.00157275 +/-    0.0000
Ecliptic YDOT         0.00193703 +/-    0.0000
Ecliptic ZDOT        -0.00013190 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   44.97405299 +/-    0.0004
Geocenter to KBO     43.99193437 +/-    0.0005
# Hcoef:  6.48

The following table shows the complete astrometric record for 03QY90. 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 (03QY90) followed by the observatory code and reference code for the source of the astrometry.

2000 08  27.03230  21 34 41.26   -16 50 00.3   22.5R 03QY90    807  Cl0321      
2000 08  27.10006  21 34 40.94   -16 50 01.8         03QY90    807  Cl0321      
2003 08  24.09097  21 49 12.48   -15 49 08.7   21.3R 03QY90    807  Ci4137      
2003 08  24.18809  21 49 12.05   -15 49 11.0         03QY90    807  Ci4137      
2003 08  25.11656  21 49 07.95   -15 49 31.8         03QY90    807  Ci4137      
2003 08  25.19767  21 49 07.59   -15 49 34.4         03QY90    807  Ci4137      
2003 09  28.18091  21 46 54.25   -16 00 25.7   21.4R 03QY90    688  Ci6257      
2003 09  28.30699  21 46 53.81   -16 00 26.2         03QY90    688  Ci6257      
2003 10  23.01159  21 45 56.58   -16 04 19.6   22.2R 03QY90    304  Ci9429      
2003 10  23.03841  21 45 56.54   -16 04 19.7         03QY90    304  Ci9429      
2003 10  23.08963  21 45 56.47   -16 04 19.8         03QY90    304  Ci9429      
2003 10  24.02579  21 45 55.23   -16 04 23.6   22.6R 03QY90    304  Ci9429      
2003 10  24.05242  21 45 55.16   -16 04 23.6         03QY90    304  Ci9429      
2004 05  28.24796  21 58 09.48   -15 02 28.1   23.2R 03QY90    304  Ck9589      
2004 05  28.33567  21 58 09.39   -15 02 28.4         03QY90    304  Ck9589      
2004 05  28.37691  21 58 09.46   -15 02 27.7         03QY90    304  Ck9589      
2004 05  29.27426  21 58 09.31   -15 02 33.4   23.0R 03QY90    304  Ck9589      
2004 05  29.39376  21 58 09.29   -15 02 33.6         03QY90    304  Ck9589      
2004 09  13.04527  21 52 27.99   -15 35 57.1   23.0R 03QY90    304  Cl4360      
2004 09  13.27082  21 52 27.09   -15 36 01.6         03QY90    304  Cl4360      
2005 04  15.38258  22 01 25.95   -14 45 41.8   22.9R 03QY90    304  Cn3315      
2005 04  15.38542  22 01 25.95   -14 45 42.2         03QY90    304  Cn3315      
2005 04  15.38743  22 01 25.97   -14 45 42.1         03QY90    304  Cn3315      
2005 04  15.39096  22 01 26.00   -14 45 42.4         03QY90    304  Cn3315      
2005 04  15.39473  22 01 26.00   -14 45 42.2         03QY90    304  Cn3315      
2005 06  08.37634  22 02 40.82   -14 42 41.9   22.8R 03QY90    304  Cn6523      
2005 06  08.41012  22 02 40.78   -14 42 42.1         03QY90    304  Cn6523      
2005 07  09.20600  22 01 38.15   -14 50 10.0   23.2R 03QY90    304  Cn8883      
2005 07  09.20977  22 01 38.15   -14 50 10.1         03QY90    304  Cn8883      
2005 07  11.20104  22 01 31.90   -14 50 49.5         03QY90    304  Cn8883      
2005 07  11.32034  22 01 31.51   -14 50 52.0         03QY90    304  Cn8883      
2005 07  11.38300  22 01 31.27   -14 50 53.6   23.5R 03QY90    304  Cn8883      
2005 07  11.43532  22 01 31.11   -14 50 54.5         03QY90    304  Cn8883      
2006 06  20.22472  22 07 02.97   -14 23 30.4   22.6R 03QY90    304  Cr4836      
2006 06  21.40126  22 07 00.83   -14 23 40.3         03QY90    304  Cr4836      
2006 06  21.43755  22 07 00.78   -14 23 40.8         03QY90    304  Cr4836      
2007 10  11.38237  22 04 58.15   -14 39 52.0   24.0R 03QY90    250  S~06Ac      
2007 10  11.39001  22 04 58.13   -14 39 52.1         03QY90    250  S~06Ac      
2007 10  11.39765  22 04 58.11   -14 39 52.2         03QY90    250  S~06Ac      
2007 10  11.40529  22 04 58.09   -14 39 52.3         03QY90    250  S~06Ad      
2008 09  30.04035  22 10 08.88   -14 15 35.2         03QY90    807  C~06Ad      
2008 09  30.17172  22 10 08.47   -14 15 37.1         03QY90    807  C~06Ad      
2008 09  30.21987  22 10 08.30   -14 15 38.2         03QY90    807  C~06Ad      
2008 10  01.23037  22 10 04.97   -14 15 53.9         03QY90    807  C~06Ad      
2008 10  02.22156  22 10 01.77   -14 16 09.8         03QY90    807  C~06Ad      

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     0.34       0.00     0.06
  2   0.0002     -4.83     0.02       0.05     0.09
  3   2.9899  13061.48    -0.14    -681.94    -0.07
  4   2.9902  13054.83    -0.10    -682.01    -0.17
  5   2.9927  12991.87    -0.25    -681.61     0.19
  6   2.9929  12986.07    -0.47    -682.30    -0.53
  7   3.0860  10948.79    -0.29    -648.77    -1.04
  8   3.0863  10942.62    -0.29    -647.11     0.33
  9   3.1539  10084.81     0.06    -591.03     0.09
 10   3.1540  10084.23     0.05    -590.94     0.10
 11   3.1542  10083.24     0.15    -590.69     0.19
 12   3.1567  10065.08     0.15    -588.30     0.15
 13   3.1568  10064.13    -0.28    -587.97     0.41
 14   3.7514  21374.28     0.66    -710.89    -0.09
 15   3.7517  21372.93    -0.40    -710.72     0.42
 16   3.7518  21374.14     0.96    -710.41     0.88
 17   3.7543  21370.08    -0.32    -715.03    -0.22
 18   3.7546  21369.74    -0.09    -715.11     0.13
 19   4.0466  16000.30     0.07    -896.31     0.28
 20   4.0472  15986.46     0.04    -896.10     0.12
 21   4.6334  24431.66     0.16    -762.62     0.55
 22   4.6334  24431.52    -0.14    -763.00     0.18
 23   4.6334  24431.83     0.07    -763.01     0.18
 24   4.6334  24432.13     0.19    -763.45    -0.24
 25   4.6334  24432.20     0.06    -763.26    -0.04
 26   4.7812  25527.63     0.10    -977.64     0.15
 27   4.7813  25527.01     0.02    -977.63     0.29
 28   4.8656  24504.34    -0.03   -1078.07     0.34
 29   4.8656  24504.30     0.12   -1078.16     0.25
 30   4.8711  24404.23     0.21   -1083.26     0.26
 31   4.8714  24397.97     0.18   -1083.62     0.17
 32   4.8716  24394.10    -0.41   -1083.90     0.02
 33   4.8717  24391.58    -0.21   -1083.93     0.10
 34   5.8130  29565.85    -0.82   -1253.18    -5.87
 35   5.8162  29532.60    -0.15   -1251.31     0.06
 36   5.8163  29531.72     0.08   -1251.52    -0.04
 37   7.1221  27483.84     0.33   -1527.91     0.11
 38   7.1221  27483.52     0.32   -1527.90     0.10
 39   7.1222  27483.21     0.32   -1527.89     0.09
 40   7.1222  27482.90     0.31   -1527.89     0.08
 41   8.0931  32319.73    -0.46   -1784.66     0.42
 42   8.0935  32313.33     0.12   -1784.28     0.44
 43   8.0936  32310.56    -0.10   -1784.42     0.17
 44   8.0964  32258.50    -0.01   -1781.58     0.66
 45   8.0991  32208.17    -0.11   -1779.63     0.27

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.

03QY90    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        42.872    42.878    42.866
ecceobj         0.049     0.049     0.049
incobj          3.770     3.770     3.770
qmin           39.210    39.201    39.192
qmax           46.614    46.641    46.635
amean          42.808    42.814    42.802
amin           42.468    42.480    42.471
amax           43.162    43.175    43.162
emean           0.057     0.057     0.057
emin            0.037     0.036     0.037
emax            0.081     0.081     0.081
imean           2.213     2.214     2.213
imin            1.172     1.175     1.170
imax            3.408     3.402     3.415
excite_mean     0.069     0.069     0.069
fracstop        1.000     1.000     1.000
cjmean          3.082     3.082     3.082

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       183.4     183.5     183.3
kozaiamp        180.0     180.0     179.9