Orbit Fit and Astrometric record for 03QC112

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: 03QC112   
# Created Tue Feb 18 02:09:07 2020
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   31 observations of   31
# Arc:  14.07y
# First observation: 2003/08/24
#  Last observation: 2017/09/18
# Chi-squared of fit:    30.25 DOF:   56 RMS:  0.17
# Min/Max residuals:    -0.43    0.44
# Exact a, adot, b, bdot, g, gdot:
  1.642554E-05  4.070575E-02 -5.129864E-06 -1.334993E-02  4.036669E-02  4.977642E-03
# Covariance matrix:
  1.7951E-13 -1.0057E-14 -1.0465E-15  1.2657E-17  8.1227E-14 -1.0408E-15
 -1.0057E-14  2.4953E-14  6.9173E-15 -7.7260E-15  5.4989E-14  3.8888E-14
 -1.0465E-15  6.9173E-15  1.4366E-13 -1.3920E-14  1.3022E-14  1.1541E-14
  1.2657E-17 -7.7260E-15 -1.3920E-14  3.8834E-15 -1.6914E-14 -1.2779E-14
  8.1227E-14  5.4989E-14  1.3022E-14 -1.6914E-14  2.8704E-13  8.3132E-14
 -1.0408E-15  3.8888E-14  1.1541E-14 -1.2779E-14  8.3132E-14  6.4416E-14
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.856335  -15.364966    0.247027   -0.031847   -0.984361  2452875.770213
# Heliocentric elements and errors
Epoch:              2452876.5000  =  2003/08/25
Mean Anomaly:          152.76476 +/-     0.008
Argument of Peri:       21.88261 +/-     0.002
Long of Asc Node:      158.67911 +/-     0.000
Inclination:            18.28934 +/-     0.000
Eccentricity:         0.27806420 +/-    0.0000
Semi-Major Axis:     20.45894088 +/-    0.0007
Time of Perihelion: 2438533.3735 +/-       1.0
Perihelion:          14.77004183 +/-    0.0007
Aphelion:            26.14783993 +/-    0.0010
Period (y)               92.5407 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           24.75643375 +/-    0.0003
Ecliptic Y           -7.05568397 +/-    0.0001
Ecliptic Z           -0.80262461 +/-    0.0000
Ecliptic XDOT         0.00102336 +/-    0.0000
Ecliptic YDOT         0.00257481 +/-    0.0000
Ecliptic ZDOT        -0.00091574 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   25.75472082 +/-    0.0003
Geocenter to KBO     24.77289160 +/-    0.0003
# Hcoef:  9.03

The following table shows the complete astrometric record for 03QC112. 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 (03QC112) followed by the observatory code and reference code for the source of the astrometry.

2003 08  24.26947  23 06 17.37   -07 45 44.1   21.8R 03QC112   807  Ci4592      
2003 08  24.36129  23 06 16.76   -07 45 48.7         03QC112   807  Ci4592      
2003 09  03.10301  23 05 07.92   -07 54 24.7   22.6R 03QC112   304  Ci4592      
2003 09  03.17936  23 05 07.37   -07 54 29.3         03QC112   304  Ci4592      
2003 10  22.13867  22 59 53.62   -08 32 03.6   22.7R 03QC112   695  Cj4700      
2003 10  22.21847  22 59 53.24   -08 32 06.3         03QC112   695  Cj4700      
2003 10  23.12160  22 59 49.17   -08 32 34.9         03QC112   304  Ci9432      
2003 10  23.14826  22 59 49.02   -08 32 35.6         03QC112   304  Ci9432      
2004 08  13.17600  23 17 12.68   -07 24 46.6   21.6R 03QC112   807  C~2i4D      
2004 08  13.28230  23 17 12.00   -07 24 51.8         03QC112   807  C~2i4D      
2009 09  18.33000  00 01 17.68   -06 45 24.3   22.5R 03QC112   688  C~2i4D      
2009 09  18.36047  00 01 17.47   -06 45 25.8         03QC112   688  C~2i4D      
2013 10  13.229016 00 36 30.61   -05 58 06.6   22.8i 03QC112   W84  C~351P      
2013 11  08.081157 00 33 46.78   -06 13 58.9   23.2r 03QC112   W84  C~351P      
2013 11  08.082535 00 33 46.76   -06 13 58.9   22.8i 03QC112   W84  C~351P      
2013 11  08.083900 00 33 46.77   -06 13 59.0   22.4z 03QC112   W84  C~351P      
2013 11  22.057662 00 32 41.71   -06 18 28.4   23.1r 03QC112   W84  C~351P      
2014 10  03.301308 00 47 16.12   -05 31 19.2   22.6r 03QC112   W84  C~351P      
2014 10  03.302685 00 47 16.11   -05 31 19.3   22.5i 03QC112   W84  C~351P      
2014 11  14.127836 00 42 43.92   -05 58 19.7   22.6i 03QC112   W84  C~351P      
2014 11  16.044074 00 42 34.38   -05 58 59.0   22.5z 03QC112   W84  C~351P      
2016 10  01.215856 01 06 40.60   -04 51 09.7   22.4i 03QC112   W84  C~351P      
2016 10  01.217222 01 06 40.59   -04 51 09.8   22.9r 03QC112   W84  C~351P      
2016 10  01.218600 01 06 40.56   -04 51 10.3   23.6g 03QC112   W84  C~351P      
2016 11  05.132187 01 02 35.89   -05 16 51.3   22.3z 03QC112   W84  C~351P      
2016 11  07.208449 01 02 22.91   -05 17 54.4   22.1z 03QC112   W84  C~351P      
2017 08  28.302755 01 19 47.09   -03 59 00.9   23.3r 03QC112   W84  C~351P      
2017 08  28.304120 01 19 47.08   -03 59 01.0   22.6i 03QC112   W84  C~351P      
2017 09  18.273993 01 17 51.58   -04 18 35.3   22.3i 03QC112   W84  C~351P      
2017 09  18.275370 01 17 51.57   -04 18 35.4   22.8r 03QC112   W84  C~351P      
2017 09  18.317477 01 17 51.29   -04 18 37.8   22.3z 03QC112   W84  C~351P      

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    -0.06
  2   0.0003      0.00     0.44       0.00     0.15
  3   0.0269      0.00     0.18       0.00     0.10
  4   0.0271      0.00     0.28       0.00    -0.43
  5   0.1612      0.00    -0.29       0.00     0.02
  6   0.1614      0.00    -0.33       0.00    -0.07
  7   0.1639      0.00     0.18       0.00     0.15
  8   0.1639      0.00    -0.23       0.00     0.30
  9   0.9717      0.00     0.16       0.00    -0.03
 10   0.9720      0.00    -0.05       0.00     0.09
 11   6.0700      0.00    -0.37       0.00    -0.08
 12   6.0701      0.00    -0.24       0.00     0.06
 13  10.1382      0.00     0.19       0.00    -0.26
 14  10.2089      0.00     0.01       0.00    -0.08
 15  10.2089      0.00    -0.17       0.00    -0.05
 16  10.2089      0.00     0.09       0.00    -0.11
 17  10.2472      0.00     0.05       0.00    -0.00
 18  11.1103      0.00     0.15       0.00    -0.07
 19  11.1103      0.00     0.15       0.00    -0.10
 20  11.2248      0.00     0.16       0.00    -0.06
 21  11.2300      0.00     0.27       0.00    -0.01
 22  13.1059      0.00     0.11       0.00     0.36
 23  13.1059      0.00     0.11       0.00     0.34
 24  13.1060      0.00    -0.19       0.00    -0.09
 25  13.2015      0.00    -0.06       0.00    -0.02
 26  13.2072      0.00    -0.09       0.00    -0.07
 27  14.0124      0.00    -0.03       0.00     0.00
 28  14.0124      0.00    -0.08       0.00    -0.02
 29  14.0698      0.00    -0.01       0.00     0.06
 30  14.0698      0.00    -0.03       0.00     0.04
 31  14.0699      0.00    -0.10       0.00     0.03

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.

03QC112    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        20.557    20.557    20.556
ecceobj         0.272     0.272     0.272
incobj         18.216    18.216    18.216
qmin           14.813    14.813    14.813
qmax           26.442    26.444    26.440
amean          20.595    20.699    20.865
amin           20.443    20.443    20.018
amax           20.822    21.177    21.276
emean           0.252     0.228     0.217
emin            0.207     0.194     0.182
emax            0.279     0.279     0.279
imean          17.650    17.984    18.262
imin           17.154    17.153    17.155
imax           18.764    19.132    19.529
excite_mean     0.395     0.384     0.382
fracstop        0.007     0.023     0.024
cjmean          2.989     2.988     2.984

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        59.7     141.7     143.0
kozaiamp         32.5     109.7     109.5