Orbit Fit and Astrometric record for 01RU143

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: 01RU143   
# Created Tue Oct 24 01:37:14 2017
# Orbit generated from Bernstein formalism
# Fitting   27 observations of   28
# Arc:  12.07y
# First observation: 2001/09/12
#  Last observation: 2013/10/07
Preliminary a, adot, b, bdot, g, gdot:
  -0.000130   0.020567   0.000015  -0.002244   0.023375   0.000000
# Chi-squared of fit:    38.51 DOF:   48 RMS:  0.21
# Min/Max residuals:    -0.48    0.33
# Exact a, adot, b, bdot, g, gdot:
  1.263041E-05  2.063324E-02 -3.123568E-06 -2.255126E-03  2.331650E-02  2.281019E-03
# Covariance matrix:
  1.9482E-13 -4.3017E-14 -3.7108E-15  3.1799E-15  8.8470E-14 -1.3101E-13
 -4.3017E-14  3.1354E-14  3.9621E-15 -3.1497E-15  2.2326E-14  1.2805E-13
 -3.7108E-15  3.9621E-15  1.2290E-13 -1.6132E-14  3.6686E-15  1.8283E-14
  3.1799E-15 -3.1497E-15 -1.6132E-14  3.9953E-15 -2.3584E-15 -1.4558E-14
  8.8470E-14  2.2326E-14  3.6686E-15 -2.3584E-15  2.8612E-13  9.1661E-14
 -1.3101E-13  1.2805E-13  1.8283E-14 -1.4558E-14  9.1661E-14  5.9203E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
    2.006780   12.240255    0.392216    0.032274   -0.924727  2452164.826773
# Heliocentric elements and errors
Epoch:              2452160.5000  =  2001/09/08
Mean Anomaly:          132.75667 +/-     0.027
Argument of Peri:       18.78140 +/-     0.019
Long of Asc Node:      209.26763 +/-     0.000
Inclination:             6.49392 +/-     0.000
Eccentricity:         0.14519864 +/-    0.0000
Semi-Major Axis:     39.53195588 +/-    0.0030
Time of Perihelion: 2418681.3263 +/-       5.6
Perihelion:          33.79196956 +/-    0.0032
Aphelion:            45.27194219 +/-    0.0039
Period (y)              248.5597 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           42.87719977 +/-    0.0010
Ecliptic Y            8.90614081 +/-    0.0002
Ecliptic Z            1.50173251 +/-    0.0000
Ecliptic XDOT        -0.00025167 +/-    0.0000
Ecliptic YDOT         0.00242747 +/-    0.0000
Ecliptic ZDOT        -0.00025505 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   43.81813329 +/-    0.0009
Geocenter to KBO     42.88807848 +/-    0.0010
# Hcoef:  5.96

The following table shows the complete astrometric record for 01RU143. 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 (01RU143) followed by the observatory code and reference code for the source of the astrometry.

2001 09  12.32603  00 41 52.56   +06 41 05.8   22.0R 01RU143   695  Ce0436      
2001 09  12.41952  00 41 52.17   +06 41 03.1         01RU143   695  Ce0436      
2001 10  18.28284  00 39 19.27   +06 24 10.4   22.7R 01RU143   688  Ce0436      
2001 10  18.36006  00 39 18.97   +06 24 08.0         01RU143   688  Ce0436      
2001 11  03.05182  00 38 16.99   +06 16 54.0   20.6  01RU143   304  Ce6603      
2001 11  03.09817  00 38 16.83   +06 16 53.0         01RU143   304  Ce6603      
2002 08  11.38527  00 48 09.33   +07 12 06.3   21.4R 01RU143   807  C47440      
2002 08  12.32833  00 48 07.22   +07 11 53.9         01RU143   807  Cg7894      
2002 08  12.40579  00 48 07.04   +07 11 53.0         01RU143   807  Cg7894      
2002 11  07.12365  00 42 37.53   +06 35 55.3   22.2R 01RU143   695  Cg7894      
2002 11  07.23070  00 42 37.14   +06 35 52.5         01RU143   695  Cg7894      
2004 11  18.26016  00 51 04.00   +07 11 48.0   22.3R 01RU143   568  Cm0414      
2004 11  18.31741  00 51 03.81   +07 11 46.8         01RU143   568  Cm0414      
2005 09  28.290393 00 59 00.53   +07 54 36.0   21.0V 01RU143   645  C~1ReA      
2005 09  28.291222 00 59 00.53   +07 54 36.0   21.3V 01RU143   645  C~1ReA      
2005 09  28.293710 00 59 00.52   +07 54 36.0   22.2V 01RU143   645  C~1ReA      
2007 11  11.24415  01 05 02.01   +08 13 38.1   22.5R 01RU143   688  Cw6713      
2007 11  11.30887  01 05 01.70   +08 13 37.7         01RU143   688  Cw6713      
2008 09  21.37740  01 13 02.58   +08 55 18.4   24.2R 01RU143   250  S~06AQ      
2008 09  21.38365  01 13 02.55   +08 55 18.2         01RU143   250  S~06AQ      
2008 09  21.39060  01 13 02.52   +08 55 18.0         01RU143   250  S~06AQ      
2008 09  21.39754  01 13 02.50   +08 55 17.9         01RU143   250  S~06AQ      
2008 11  01.367200 01 10 07.95   +08 36 42.1   23.1V 01RU143   645  C~1ReA      
2008 11  01.368030 01 10 07.95   +08 36 42.0   22.1V 01RU143   645  C~1ReA      
2008 11  01.370517 01 10 07.94   +08 36 42.0   24.8V 01RU143   645  C~1ReA      
2013 10  07.35181  01 34 30.47   +10 20 04.1   22.2R 01RU143   695  C~0zdD      
2013 10  07.41367  01 34 30.20   +10 20 02.7         01RU143   695  C~0zdD      
2013 10  07.47178  01 34 29.94   +10 20 01.1         01RU143   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     0.28       0.00     0.33
  2   0.0003     -6.40     0.02      -0.21     0.10
  3   0.0984  -2499.70    -0.25     -38.71     0.07
  4   0.0987  -2504.75     0.08     -39.16    -0.25
  5   0.1416  -3525.19    -0.12     -75.33    -0.06
  6   0.1417  -3527.78     0.14     -75.32     0.06
  7   0.9119   5893.11     0.11    -474.18     0.15
  8   0.9144   5859.33    -0.06    -473.41     0.14
  9   0.9147   5856.51     0.00    -473.20     0.26
 10   1.1521    495.15    -0.01    -547.88     0.11
 11   1.1524    488.70    -0.13    -548.19     0.05
 12   3.1839   8285.13    -0.07   -1499.51    -0.03
 13   3.1841   8282.06    -0.23   -1499.53     0.09
 14   4.0437  15840.47     0.09   -1858.51    -0.38
 15   4.0437  15840.47     0.15   -1858.51    -0.38
 16   4.0437  15840.33     0.19   -1858.45    -0.32
 17   6.1627  21284.13     0.12   -2854.76    -0.26
 18   6.1629  21279.67 (  -0.40)  -2853.37 (   1.25)
 19   7.0255  28942.60    -0.18   -3234.46     0.26
 20   7.0255  28942.10    -0.27   -3234.48     0.25
 21   7.0255  28941.60    -0.31   -3234.50     0.24
 22   7.0255  28941.28    -0.17   -3234.48     0.26
 23   7.1377  26073.59     0.14   -3295.25    -0.38
 24   7.1377  26073.55     0.16   -3295.34    -0.48
 25   7.1377  26073.41     0.19   -3295.28    -0.41
 26  12.0685  49251.43     0.03   -5581.03     0.07
 27  12.0687  49246.97     0.12   -5580.88     0.28
 28  12.0688  49242.58    -0.01   -5580.99     0.24

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.

01RU143    quality flag:3

Type:           3:2E      3:2E      3:2E

axisobj        39.689    39.698    39.680
ecceobj         0.143     0.143     0.143
incobj          6.487     6.487     6.487
qmin           32.827    32.900    32.875
qmax           46.544    46.487    46.593
amean          39.458    39.457    39.458
amin           39.062    39.061    39.069
amax           39.902    39.912    39.903
emean           0.149     0.149     0.149
emin            0.130     0.131     0.130
emax            0.167     0.166     0.168
imean           7.904     7.906     7.909
imin            6.969     6.969     6.969
imax            8.705     8.712     8.742
excite_mean     0.203     0.203     0.203
fracstop        1.000     1.000     1.000
cjmean          3.005     3.005     3.005

libcent 0       181.4     180.0     179.4
libamp  0        67.2      66.4      64.2
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       183.7     184.2     183.6
kozaiamp        180.0     180.0     180.0