Orbit Fit and Astrometric record for 03QP91

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: 03QP91    
# Created Sun Dec  5 02:09:38 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     27 observations of     27
# Arc:  15.15y
# First observation: 2003/08/23
#  Last observation: 2018/10/18
# Chi-squared of fit:    11.76 DOF:     48 RMS:  0.12
# Min/Max residuals:    -0.23    0.32
# Exact a, adot, b, bdot, g, gdot:
  1.497834E-05  2.617289E-02  1.406355E-06  2.429631E-03  2.672506E-02  2.572593E-03
# Covariance matrix:
  3.2404E-13 -2.9000E-14  1.4347E-16 -8.4407E-16  8.1422E-14 -2.4760E-14
 -2.9000E-14  3.5862E-14 -3.1797E-15  3.2079E-15  5.1978E-14  9.2813E-14
  1.4347E-16 -3.1797E-15  2.7532E-13 -2.1651E-14 -6.0224E-15 -8.6824E-15
 -8.4407E-16  3.2079E-15 -2.1651E-14  2.3548E-15  4.6982E-15  8.8150E-15
  8.1422E-14  5.1978E-14 -6.0224E-15  4.6982E-15  2.6347E-13  1.3526E-13
 -2.4760E-14  9.2813E-14 -8.6824E-15  8.8150E-15  1.3526E-13  2.5507E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
   -4.016505   -9.460561    0.362960   -0.066383   -0.946217  2452874.776343
# Heliocentric elements and errors
Epoch:              2452874.5000  =  2003/08/23
Mean Anomaly:          117.72871 +/-     0.028
Argument of Peri:      195.70385 +/-     0.021
Long of Asc Node:       26.56475 +/-     0.000
Inclination:             6.55751 +/-     0.000
Eccentricity:         0.10316837 +/-    0.0000
Semi-Major Axis:     36.33715565 +/-    0.0023
Time of Perihelion: 2426710.4655 +/-       6.8
Perihelion:          32.58831057 +/-    0.0024
Aphelion:            40.08600073 +/-    0.0028
Period (y)              219.0456 +/-      0.02
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           37.69175185 +/-    0.0007
Ecliptic Y           -6.64500082 +/-    0.0001
Ecliptic Z           -2.62086841 +/-    0.0001
Ecliptic XDOT         0.00071197 +/-    0.0000
Ecliptic YDOT         0.00259302 +/-    0.0000
Ecliptic ZDOT         0.00023001 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   38.36260246 +/-    0.0007
Geocenter to KBO     37.41803701 +/-    0.0007
# Hcoef:  7.36

The following table shows the complete astrometric record for 03QP91. 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 (03QP91) followed by the observatory code and reference code for the source of the astrometry.

2003 08  23.27560  23 31 35.83   -07 26 23.5   21.8R 03QP91    807  Ci4137      
2003 08  24.30123  23 31 31.17   -07 26 54.3         03QP91    807  Ci4137      
2003 08  24.37297  23 31 30.84   -07 26 56.2         03QP91    807  Ci4137      
2003 10  23.22639  23 26 53.74   -07 53 42.0         03QP91    304  Ci9429      
2003 10  23.26417  23 26 53.62   -07 53 42.7         03QP91    304  Ci9429      
2013 09  02.27282  00 22 27.564  -00 20 38.41  24.0g 03QP91    W84  C~52RL      
2013 10  13.08917  00 19 15.682  -00 40 26.49  22.7z 03QP91    W84  C~52RL      
2013 10  13.11349  00 19 15.574  -00 40 27.12  23.0i 03QP91    W84  C~52RL      
2013 11  23.09694  00 16 44.697  -00 53 51.25  23.6r 03QP91    W84  C~52RL      
2013 11  23.09831  00 16 44.703  -00 53 51.35  22.9i 03QP91    W84  C~52RL      
2013 12  02.11176  00 16 27.499  -00 54 53.07  23.9g 03QP91    W84  C~52RL      
2014 08  18.30926  00 28 26.166  +00 28 11.76  23.1z 03QP91    W84  C~52RL      
2015 11  02.09796  00 27 51.776  +00 36 18.39  23.8r 03QP91    W84  C~52RL      
2016 09  09.31225  00 36 55.866  +01 42 54.81  23.2r 03QP91    W84  C~52RL      
2016 09  09.31362  00 36 55.863  +01 42 54.92  23.1i 03QP91    W84  C~52RL      
2016 09  09.31500  00 36 55.848  +01 42 54.75  24.2g 03QP91    W84  C~52RL      
2016 10  02.18440  00 35 08.563  +01 31 50.69  23.2i 03QP91    W84  C~52RL      
2016 11  18.11310  00 31 50.514  +01 13 06.60  22.8r 03QP91    W84  C~52RL      
2016 11  19.10268  00 31 47.575  +01 12 52.16  24.0g 03QP91    W84  C~52RL      
2017 08  22.32458  00 43 04.617  +02 32 22.33  22.9i 03QP91    W84  C~52RL      
2017 08  22.32596  00 43 04.628  +02 32 22.17  23.4r 03QP91    W84  C~52RL      
2017 08  22.32734  00 43 04.595  +02 32 22.38  24.0g 03QP91    W84  C~52RL      
2017 09  27.20200  00 40 32.549  +02 16 26.96  23.0r 03QP91    W84  C~52RL      
2017 09  27.20337  00 40 32.546  +02 16 26.87  22.3i 03QP91    W84  C~52RL      
2017 09  27.20473  00 40 32.537  +02 16 26.72  23.7g 03QP91    W84  C~52RL      
2018 10  18.19480  00 43 50.863  +02 48 22.73  23.5i 03QP91    W84  C~52RL      
2018 10  18.19616  00 43 50.866  +02 48 22.76  23.2z 03QP91    W84  C~52RL      

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     0.09       0.00     0.05
     2   0.0028      0.00    -0.20       0.00    -0.10
     3   0.0030      0.00    -0.18       0.00     0.14
     4   0.1669      0.00    -0.02       0.00     0.03
     5   0.1670      0.00     0.29       0.00    -0.02
     6  10.0287      0.00     0.32       0.00    -0.13
     7  10.1405      0.00    -0.14       0.00    -0.09
     8  10.1406      0.00    -0.03       0.00    -0.06
     9  10.2528      0.00    -0.05       0.00    -0.05
    10  10.2528      0.00     0.09       0.00    -0.14
    11  10.2774      0.00    -0.22       0.00     0.12
    12  10.9871      0.00     0.05       0.00     0.01
    13  12.1939      0.00     0.11       0.00     0.06
    14  13.0487      0.00     0.05       0.00    -0.00
    15  13.0487      0.00     0.10       0.00     0.14
    16  13.0487      0.00    -0.03       0.00     0.01
    17  13.1113      0.00     0.09       0.00    -0.11
    18  13.2398      0.00     0.15       0.00     0.01
    19  13.2425      0.00    -0.05       0.00     0.07
    20  13.9988      0.00    -0.05       0.00     0.04
    21  13.9988      0.00     0.19       0.00    -0.09
    22  13.9988      0.00    -0.23       0.00     0.15
    23  14.0970      0.00    -0.03       0.00     0.05
    24  14.0970      0.00     0.02       0.00     0.00
    25  14.0970      0.00    -0.01       0.00    -0.11
    26  15.1538      0.00    -0.16       0.00     0.01
    27  15.1538      0.00    -0.02       0.00     0.07

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.

03QP91    quality flag:3

Type:           4:3E      4:3E      4:3E

axisobj        36.645    36.646    36.645
ecceobj         0.098     0.098     0.098
incobj          6.534     6.534     6.534
qmin           31.749    31.749    31.747
qmax           41.586    41.582    41.589
amean          36.479    36.479    36.479
amin           36.170    36.170    36.170
amax           36.814    36.814    36.814
emean           0.106     0.106     0.106
emin            0.084     0.084     0.085
emax            0.130     0.130     0.130
imean           7.150     7.150     7.150
imin            6.370     6.370     6.370
imax            7.696     7.697     7.695
excite_mean     0.164     0.164     0.164
fracstop        1.000     1.000     1.000
cjmean          2.994     2.994     2.994

libcent 0       180.3     180.4     180.2
libamp  0        42.4      42.4      42.3
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       179.7     179.9     179.9
kozaiamp        180.0     180.0     179.9