Orbit Fit and Astrometric record for 03QO91

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: 03QO91    
# Created Mon Oct 23 01:37:25 2017
# Orbit generated from Bernstein formalism
# Fitting   17 observations of   18
# Arc:  14.09y
# First observation: 2003/08/23
#  Last observation: 2017/09/23
Preliminary a, adot, b, bdot, g, gdot:
  -0.000865   0.028233   0.000163  -0.003354   0.027546   0.000000
# Chi-squared of fit:    28.06 DOF:   28 RMS:  0.23
# Min/Max residuals:    -0.49    0.54
# Exact a, adot, b, bdot, g, gdot:
  1.633151E-05  2.748927E-02 -2.573147E-06 -3.263982E-03  2.601897E-02  7.787129E-04
# Covariance matrix:
  2.0929E-13 -3.4165E-14 -3.8715E-15  2.7218E-15  1.1129E-13 -6.2875E-14
 -3.4165E-14  3.6686E-14  3.8474E-15 -3.8554E-15  5.3203E-14  8.8511E-14
 -3.8715E-15  3.8474E-15  1.4852E-13 -1.6114E-14  1.5275E-15  1.0822E-14
  2.7218E-15 -3.8554E-15 -1.6114E-14  4.3798E-15 -4.7518E-15 -1.0552E-14
  1.1129E-13  5.3203E-14  1.5275E-15 -4.7518E-15  4.7968E-13  1.0800E-13
 -6.2875E-14  8.8511E-14  1.0822E-14 -1.0552E-14  1.0800E-13  2.4234E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
   -2.218816  -21.103098    0.166135   -0.038746   -1.001217  2452874.655233
# Heliocentric elements and errors
Epoch:              2452870.5000  =  2003/08/19
Mean Anomaly:            8.94473 +/-     0.009
Argument of Peri:      186.03381 +/-     0.012
Long of Asc Node:      141.08968 +/-     0.000
Inclination:             7.13102 +/-     0.000
Eccentricity:         0.12794594 +/-    0.0001
Semi-Major Axis:     45.11047069 +/-    0.0055
Time of Perihelion: 2450120.8398 +/-       2.8
Perihelion:          39.33876908 +/-    0.0061
Aphelion:            50.88217231 +/-    0.0072
Period (y)              302.9872 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           36.70140065 +/-    0.0010
Ecliptic Y          -14.33902832 +/-    0.0004
Ecliptic Z           -1.48809541 +/-    0.0000
Ecliptic XDOT         0.00110017 +/-    0.0000
Ecliptic YDOT         0.00266817 +/-    0.0000
Ecliptic ZDOT        -0.00034619 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   39.43114215 +/-    0.0009
Geocenter to KBO     38.43349571 +/-    0.0010
# Hcoef:  6.75

The following table shows the complete astrometric record for 03QO91. 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 (03QO91) followed by the observatory code and reference code for the source of the astrometry.

2003 08  23.15449  22 45 23.32   -10 17 24.4   21.7R 03QO91    807  Ci4137      
2003 08  24.24550  22 45 18.23   -10 17 57.7         03QO91    807  Ci4137      
2003 08  24.34971  22 45 17.73   -10 18 01.0         03QO91    807  Ci4137      
2003 09  29.20936  22 42 34.03   -10 35 08.9   22.2R 03QO91    688  Ci6257      
2003 09  29.33410  22 42 33.53   -10 35 11.9         03QO91    688  Ci6257      
2003 10  24.09833  22 41 09.92   -10 43 17.6   22.7R 03QO91    304  Ci9429      
2003 10  24.12483  22 41 09.86   -10 43 17.9         03QO91    304  Ci9429      
2004 07  16.33525  22 53 57.05   -09 35 11.3   21.4R 03QO91    807  C~077P      
2004 07  16.38676  22 53 56.91   -09 35 12.5         03QO91    807  C~077P      
2007 10  11.14934  23 06 22.17   -08 57 14.5   23.2R 03QO91    688  C~077P      
2007 10  11.22698  23 06 21.72   -08 57 16.2         03QO91    688  C~077P      
2009 09  18.23582  23 20 09.63   -07 53 32.2   22.9R 03QO91    688  C~09at      
2009 09  18.28500  23 20 09.40   -07 53 33.7         03QO91    688  C~09at      
2009 10  16.159012 23 18 11.22   -08 05 53.7         03QO91    645  C~1PqY      
2009 10  16.159842 23 18 11.22   -08 05 53.7         03QO91    645  C~1PqY      
2009 10  16.162329 23 18 11.21   -08 05 53.8         03QO91    645  C~1PqY      
2017 09  23.33341  00 07 25.21   -04 13 00.3   22.6R 03QO91    G37  C~2LPu      
2017 09  23.42517  00 07 24.82   -04 13 03.7         03QO91    G37  C~2LPu      

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     0.12
  2   0.0030    -82.13    -0.20      -2.51     0.12
  3   0.0033    -90.21    -0.36      -2.78     0.04
  4   0.1015  -2714.49    -0.08     -46.99     0.07
  5   0.1018  -2722.45     0.24     -47.01     0.02
  6   0.1696  -4047.54    -0.03     -35.67    -0.02
  7   0.1697  -4048.47     0.11     -35.62    -0.01
  8   0.8985   7987.36     0.11    -543.10     0.02
  9   0.8987   7984.98     0.18    -543.41    -0.09
 10   4.1341  19090.31     0.31   -2724.04     0.36
 11   4.1344  19083.45 (  -1.72)  -2722.98 (   1.29)
 12   6.0728  32082.83    -0.06   -4092.03     0.23
 13   6.0729  32079.01    -0.05   -4092.03     0.22
 14   6.1492  30130.33    -0.12   -4067.46    -0.45
 15   6.1492  30130.33    -0.07   -4067.46    -0.45
 16   6.1492  30130.15    -0.10   -4067.50    -0.49
 17  14.0867  79485.78    -0.14   -9790.16     0.54
 18  14.0870  79478.06     0.20   -9790.79    -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.

03QO91    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        45.595    45.612    45.578
ecceobj         0.137     0.137     0.137
incobj          7.109     7.109     7.109
qmin           38.599    38.592    38.600
qmax           52.523    52.533    52.442
amean          45.385    45.402    45.368
amin           45.010    45.023    44.987
amax           45.808    45.825    45.790
emean           0.133     0.133     0.133
emin            0.119     0.118     0.118
emax            0.147     0.147     0.146
imean           6.112     6.113     6.112
imin            5.522     5.521     5.524
imax            6.710     6.705     6.708
excite_mean     0.170     0.171     0.170
fracstop        1.000     1.000     1.000
cjmean          3.083     3.083     3.083

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       183.3     183.4     183.4
kozaiamp        179.9     179.9     180.0