Orbit Fit and Astrometric record for 01RW143

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: 01RW143   
# Created Wed Oct 18 01:37:15 2017
# Orbit generated from Bernstein formalism
# Fitting   20 observations of   20
# Arc:  12.07y
# First observation: 2001/09/12
#  Last observation: 2013/10/06
Preliminary a, adot, b, bdot, g, gdot:
  -0.000778   0.024871   0.000021  -0.000593   0.024476   0.000000
# Chi-squared of fit:    45.18 DOF:   34 RMS:  0.27
# Min/Max residuals:    -0.59    0.52
# Exact a, adot, b, bdot, g, gdot:
  1.419108E-05  2.433933E-02 -1.536137E-07 -5.773893E-04  2.457696E-02  3.827470E-04
# Covariance matrix:
  2.4744E-13 -5.0631E-14 -1.8658E-15  9.7089E-16  1.5062E-13 -1.2132E-13
 -5.0631E-14  3.9632E-14  8.5816E-16 -8.9350E-16  3.5208E-15  1.3302E-13
 -1.8658E-15  8.5816E-16  1.4257E-13 -1.6345E-14 -2.1471E-15  3.0981E-15
  9.7089E-16 -8.9350E-16 -1.6345E-14  3.8202E-15  1.5887E-16 -3.3071E-15
  1.5062E-13  3.5208E-15 -2.1471E-15  1.5887E-16  3.2944E-13  2.5970E-14
 -1.2132E-13  1.3302E-13  3.0981E-15 -3.3071E-15  2.5970E-14  4.9428E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
   -2.679421   14.148951    0.422162   -0.042757   -0.910996  2452164.868083
# Heliocentric elements and errors
Epoch:              2452160.5000  =  2001/09/08
Mean Anomaly:            3.96908 +/-     0.042
Argument of Peri:      237.81861 +/-     0.045
Long of Asc Node:      131.49550 +/-     0.003
Inclination:             2.96494 +/-     0.000
Eccentricity:         0.03687519 +/-    0.0001
Semi-Major Axis:     43.19403510 +/-    0.0043
Time of Perihelion: 2451017.3028 +/-      12.1
Perihelion:          41.60124667 +/-    0.0052
Aphelion:            44.78682353 +/-    0.0055
Period (y)              283.8859 +/-      0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           40.40091349 +/-    0.0009
Ecliptic Y            9.75485842 +/-    0.0002
Ecliptic Z           -1.90208136 +/-    0.0000
Ecliptic XDOT        -0.00063306 +/-    0.0000
Ecliptic YDOT         0.00263985 +/-    0.0000
Ecliptic ZDOT        -0.00006603 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.60539613 +/-    0.0009
Geocenter to KBO     40.68851473 +/-    0.0010
# Hcoef:  7.18

The following table shows the complete astrometric record for 01RW143. 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 (01RW143) followed by the observatory code and reference code for the source of the astrometry.

2001 09  12.36734  00 56 15.00   +03 06 32.8   22.8R 01RW143   695  Ce0436      
2001 09  12.45401  00 56 14.65   +03 06 30.2         01RW143   695  Ce0436      
2001 10  19.35775  00 53 32.60   +02 49 04.6   22.9R 01RW143   695  Ce0436      
2001 10  19.40456  00 53 32.40   +02 49 03.4         01RW143   695  Ce0436      
2001 10  20.35560  00 53 28.20   +02 48 37.6         01RW143   695  Ce0436      
2001 12  16.06454  00 50 38.49   +02 33 11.9   22.6  01RW143   304  Ce9438      
2001 12  16.10215  00 50 38.46   +02 33 11.4         01RW143   304  Ce9438      
2002 08  12.33571  01 03 03.32   +03 48 34.2   22.0R 01RW143   807  Ci9379      
2002 08  12.41326  01 03 03.18   +03 48 32.8         01RW143   807  Ci9379      
2003 10  22.30897  01 03 47.10   +03 48 54.7         01RW143   304  Ci9379      
2003 10  22.32339  01 03 47.02   +03 48 54.4         01RW143   304  Ci9379      
2007 11  11.27723  01 23 12.52   +05 40 37.4   23.0R 01RW143   688  Cw6713      
2007 11  11.33837  01 23 12.27   +05 40 35.7         01RW143   688  Cw6713      
2008 09  20.77879  01 32 10.20   +06 32 22.6   26.0R 01RW143   250  S~06AQ      
2008 09  20.78504  01 32 10.18   +06 32 22.6         01RW143   250  S~06AQ      
2008 09  20.79199  01 32 10.15   +06 32 22.4         01RW143   250  S~06AQ      
2008 09  20.79824  01 32 10.13   +06 32 22.4         01RW143   250  S~06AQ      
2013 10  05.41838  01 57 31.64   +08 50 20.4   23.3R 01RW143   695  C~0zdD      
2013 10  05.48206  01 57 31.36   +08 50 18.7         01RW143   695  C~0zdD      
2013 10  06.42931  01 57 27.23   +08 49 54.6         01RW143   695  C~0zdD      

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     0.30       0.00    -0.04
  2   0.0002     -5.84     0.24      -0.37    -0.29
  3   0.1013  -2648.97     0.17     -26.31    -0.30
  4   0.1014  -2652.19     0.33     -26.25    -0.29
  5   0.1040  -2720.21     0.10     -25.70    -0.31
  6   0.2593  -5424.25    -0.25     105.23     0.19
  7   0.2594  -5424.86    -0.30     104.94    -0.24
  8   0.9144   6615.33    -0.59     -30.14     0.28
  9   0.9146   6612.86    -0.33     -30.63     0.03
 10   2.1080   7228.78     0.18    -263.33     0.21
 11   2.1080   7227.55     0.01    -263.14     0.38
 12   6.1627  26022.81    -0.02    -715.21    -0.03
 13   6.1628  26018.65    -0.15    -715.37    -0.34
 14   7.0237  34809.49    -0.02    -857.51     0.28
 15   7.0237  34809.20     0.12    -857.39     0.41
 16   7.0237  34808.70     0.08    -857.41     0.40
 17   7.0238  34808.42     0.21    -857.30     0.52
 18  12.0631  60185.27    -0.10   -1503.29    -0.24
 19  12.0633  60180.40    -0.10   -1503.38    -0.31
 20  12.0659  60109.02     0.10   -1503.75    -0.30

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.

01RW143    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.382    43.395    43.369
ecceobj         0.041     0.041     0.041
incobj          2.963     2.963     2.963
qmin           40.319    40.313    40.302
qmax           46.035    46.080    46.027
amean          43.072    43.085    43.059
amin           42.735    42.748    42.720
amax           43.415    43.429    43.403
emean           0.043     0.043     0.043
emin            0.022     0.022     0.022
emax            0.061     0.061     0.061
imean           2.550     2.545     2.554
imin            1.429     1.430     1.429
imax            3.446     3.436     3.455
excite_mean     0.063     0.063     0.063
fracstop        1.000     1.000     1.000
cjmean          3.086     3.086     3.086

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       180.3     180.3     180.5
kozaiamp        179.9     179.9     179.9