Orbit Fit and Astrometric record for 01SD291

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: 01SD291   
# Created Sun Dec 17 02:37:10 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting    8 observations of   10
# Arc:  85.61d
# First observation: 2001/09/18
#  Last observation: 2001/12/12
# Chi-squared of fit:    15.24 DOF:   10 RMS:  0.24
# Min/Max residuals:    -0.67    0.36
# Exact a, adot, b, bdot, g, gdot:
  1.620658E-05  2.492079E-02 -2.875354E-07 -1.237974E-03  2.459330E-02  4.354613E-04
# Covariance matrix:
  3.4618E-13  1.3742E-11  6.0449E-14 -1.0511E-12  5.0035E-12  4.1646E-10
  1.3742E-11  4.2175E-09  1.8974E-11 -3.2195E-10  1.4526E-09  1.2764E-07
  6.0449E-14  1.8974E-11  2.8772E-13 -1.5550E-12  6.5308E-12  5.7430E-10
 -1.0511E-12 -3.2195E-10 -1.5550E-12  2.4792E-11 -1.1088E-10 -9.7442E-09
  5.0035E-12  1.4526E-09  6.5308E-12 -1.1088E-10  5.0087E-10  4.3957E-08
  4.1646E-10  1.2764E-07  5.7430E-10 -9.7442E-09  4.3957E-08  3.8631E-06
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.420491    8.260608    0.228424   -0.024334   -0.976196  2452170.793543
# Heliocentric elements and errors
Epoch:              2452170.5000  =  2001/09/18
Mean Anomaly:            5.33860 +/-     2.455
Argument of Peri:      199.57508 +/-     7.851
Long of Asc Node:      162.01835 +/-     0.042
Inclination:             3.16874 +/-     0.005
Eccentricity:         0.08819573 +/-    0.0824
Semi-Major Axis:     45.64630397 +/-    1.1368
Time of Perihelion: 2450500.0554 +/-     770.8
Perihelion:          41.62049487 +/-    3.9009
Aphelion:            49.67211307 +/-    3.9589
Period (y)              308.4016 +/-     11.52
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           41.22877893 +/-    0.0371
Ecliptic Y            5.76073152 +/-    0.0054
Ecliptic Z           -1.00797497 +/-    0.0009
Ecliptic XDOT        -0.00036269 +/-    0.0002
Ecliptic YDOT         0.00275297 +/-    0.0000
Ecliptic ZDOT        -0.00013877 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.64149089 +/-    0.0367
Geocenter to KBO     40.66150306 +/-    0.0375
# Hcoef:  8.04

The following table shows the complete astrometric record for 01SD291. 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 (01SD291) followed by the observatory code and reference code for the source of the astrometry.

2001 09  18.29280  00 32 35.43   +01 58 14.7         01SD291   675  Ce0701      
2001 09  18.33611  00 32 35.26   +01 58 13.8         01SD291   675  Ce0701      
2001 09  18.37713  00 32 35.07   +01 58 12.5         01SD291   675  Ce0701      
2001 09  20.36917  00 32 26.41   +01 57 14.1   24. R 01SD291   675  Ce0701      
2001 09  20.39690  00 32 26.28   +01 57 13.8         01SD291   675  Ce0701      
2001 12  12.81403  00 27 51.90   +01 28 19.7         01SD291   950  Ce6616      
2001 12  12.86119  00 27 51.87   +01 28 19.6         01SD291   950  Ce6616      
2001 12  12.89822  00 27 51.83   +01 28 19.5         01SD291   950  Ce6616      
2003 11  21.13157  00 38 41.429  +02 28 18.30  23.8R 01SD291   695              
2003 11  21.18091  00 38 41.282  +02 28 17.49        01SD291   695              

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    -0.12       0.00    -0.67
  2   0.0001      0.00     0.36       0.00     0.27
  3   0.0002      0.00     0.21       0.00     0.15
  4   0.0057      0.00     0.02       0.00    -0.29
  5   0.0058      0.00    -0.08       0.00     0.21
  6   0.2341      0.00     0.07       0.00     0.00
  7   0.2343      0.00     0.13       0.00     0.03
  8   0.2344      0.00    -0.07       0.00     0.02
  9   2.1734      0.00 (-353.11)      0.00 (-143.20)
 10   2.1735      0.00 (-353.27)      0.00 (-143.22)

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.

01SD291    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        45.884    45.884    45.884
ecceobj         0.093     0.093     0.093
incobj          3.164     3.164     3.164
qmin           40.763    40.760    40.766
qmax           50.623    50.622    50.624
amean          45.542    45.542    45.542
amin           45.166    45.166    45.166
amax           45.951    45.951    45.952
emean           0.088     0.088     0.088
emin            0.074     0.074     0.074
emax            0.102     0.102     0.102
imean           3.112     3.112     3.112
imin            2.575     2.575     2.575
imax            3.599     3.599     3.599
excite_mean     0.104     0.104     0.104
fracstop        1.000     1.000     1.000
cjmean          3.107     3.107     3.107

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       184.4     184.4     184.4
kozaiamp        180.0     179.9     180.0