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 Mon Oct 23 01:37:25 2017
# Orbit generated from Bernstein formalism
# Fitting    5 observations of    5
# Arc:  60.99d
# First observation: 2003/08/23
#  Last observation: 2003/10/23
Preliminary a, adot, b, bdot, g, gdot:
  -0.000002   0.018579  -0.000000   0.002508   0.025325   0.000000
# WARNING MRQMIN stopped after  13 iterations -- oscilliatory solution
# WARNING Fitting with energy constraint
# WARNING MRQMIN stopped after  19 iterations -- oscilliatory solution
# WARNING MRQMIN stopped after  13 iterations -- oscilliatory solution
# Chi-squared of fit:     1.38 DOF:    5 RMS:  0.09
# Min/Max residuals:    -0.14    0.14
# Exact a, adot, b, bdot, g, gdot:
  1.192985E-05  1.972401E-02  1.381721E-06  2.513457E-03  2.568188E-02  1.746629E-02
# Covariance matrix:
  5.3713E-11  8.9948E-08  5.6989E-12 -1.1395E-09  1.5154E-08 -4.2825E-08
  8.9948E-08  1.5243E-04  9.6547E-09 -1.9335E-06  2.5659E-05 -7.7986E-05
  5.6989E-12  9.6547E-09  1.1090E-12 -1.2548E-10  1.6254E-09 -4.9055E-09
 -1.1395E-09 -1.9335E-06 -1.2548E-10  2.4586E-08 -3.2534E-07  1.0238E-06
  1.5154E-08  2.5659E-05  1.6254E-09 -3.2534E-07  4.3203E-06 -1.2841E-05
 -4.2825E-08 -7.7986E-05 -4.9055E-09  1.0238E-06 -1.2841E-05  1.1651E-04
#      lat0       lon0       xBary       yBary       zBary        JD0
   -4.016505   -9.460561    0.362959   -0.066383   -0.946218  2452874.776343
# Heliocentric elements and errors
Epoch:              2452870.5000  =  2003/08/19
Mean Anomaly:           46.74747 +/-    39.241
Argument of Peri:      204.63108 +/-    29.158
Long of Asc Node:       18.76732 +/-    16.437
Inclination:             8.11165 +/-     4.212
Eccentricity:         0.65563178 +/-    0.4161
Semi-Major Axis:     42.74863207 +/-   21.4432
Time of Perihelion: 2439613.7412 +/-    4933.6
Perihelion:          14.72127040 +/-   19.2603
Aphelion:            70.77599374 +/-   39.7092
Period (y)              279.5063 +/-    210.30
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           39.18728636 +/-    3.1009
Ecliptic Y           -6.89430659 +/-    0.5170
Ecliptic Z           -2.72732718 +/-    0.2208
Ecliptic XDOT         0.00219104 +/-    0.0011
Ecliptic YDOT         0.00176000 +/-    0.0013
Ecliptic ZDOT         0.00013704 +/-    0.0001
# Distances at JD0 (AU)
Heliocenter to KBO   39.88249227 +/-    3.0482
Geocenter to KBO     38.93796280 +/-    3.1514
# Hcoef:  6.14

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      

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     0.04       0.00     0.03
  2   0.0028    -75.84    -0.09      -0.86    -0.12
  3   0.0030    -81.10     0.04      -0.66     0.09
  4   0.1669  -4500.51    -0.14     148.52     0.08
  5   0.1670  -4502.42     0.14     148.58    -0.08

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:0

Type:      ERR2LARGE ERR2LARGE ERR2LARGE

axisobj         0.000     0.000     0.000
ecceobj        -1.000    -1.000    -1.000
incobj         -1.000    -1.000    -1.000
qmin            0.000     0.000     0.000
qmax            0.000     0.000     0.000
amean           0.000     0.000     0.000
amin            0.000     0.000     0.000
amax            0.000     0.000     0.000
emean           0.000     0.000     0.000
emin            0.000     0.000     0.000
emax            0.000     0.000     0.000
imean           0.000     0.000     0.000
imin            0.000     0.000     0.000
imax            0.000     0.000     0.000
excite_mean     0.000     0.000     0.000
fracstop        0.000     0.000     0.000
cjmean          0.000     0.000     0.000

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         0.0       0.0       0.0
kozaiamp          0.0       0.0       0.0