Orbit Fit and Astrometric record for 49673

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: 49673     
# Created Tue Oct 24 01:36:20 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   26 observations of   26
# Arc:  14.21y
# First observation: 1999/07/20
#  Last observation: 2013/10/06
# Chi-squared of fit:   100.52 DOF:   46 RMS:  0.35
# Min/Max residuals:    -0.67    1.05
# Exact a, adot, b, bdot, g, gdot:
  1.253289E-05  2.157890E-02 -9.202706E-06 -8.930342E-03  2.411206E-02 -2.229981E-03
# Covariance matrix:
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.095899  -44.670697    0.320937   -0.018635   -0.961627  2451379.946603
# Heliocentric elements and errors
Epoch:              2451380.5000  =  1999/07/21
Mean Anomaly:          287.28573 +/-     0.000
Argument of Peri:      267.62475 +/-     0.000
Long of Asc Node:      132.31787 +/-     0.000
Inclination:            22.50083 +/-     0.000
Eccentricity:         0.10706656 +/-    0.0000
Semi-Major Axis:     43.34720437 +/-    0.0000
Time of Perihelion: 2472435.5961 +/-       0.0
Perihelion:          38.70616822 +/-    0.0000
Aphelion:            47.98824053 +/-    0.0000
Period (y)              285.3973 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           29.95512826 +/-    0.0000
Ecliptic Y          -30.05406553 +/-    0.0000
Ecliptic Z           -0.79356811 +/-    0.0000
Ecliptic XDOT         0.00152530 +/-    0.0000
Ecliptic YDOT         0.00194262 +/-    0.0000
Ecliptic ZDOT        -0.00100894 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   42.44045233 +/-    0.0000
Geocenter to KBO     41.47311196 +/-    0.0000
# Hcoef:  7.40

The following table shows the complete astrometric record for 49673. 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 (49673) followed by the observatory code and reference code for the source of the astrometry.

1999 07  20.44586  21 12 31.26   -17 17 10.6   24.1R 49673     568  Cb9109      
1999 07  20.48388  21 12 31.08   -17 17 11.3         49673     568  Cb9109      
1999 07  20.51177  21 12 30.96   -17 17 12.1         49673     568  Cb9109      
1999 09  13.16523  21 08 27.59   -17 39 36.8   23.4R 49673     695  Ca8546      
1999 09  13.18035  21 08 27.53   -17 39 37.2   23.6R 49673     695  Ca8546      
1999 09  13.19539  21 08 27.50   -17 39 37.6   23.3R 49673     695  Ca8546      
1999 09  14.16945  21 08 23.98   -17 39 57.5         49673     695  Ca8546      
1999 09  14.18270  21 08 23.92   -17 39 57.4         49673     695  Ca8546      
1999 09  14.19575  21 08 23.90   -17 39 57.7         49673     695  Ca8546      
2000 08  01.19412  21 17 10.62   -17 29 45.5   22.8R 49673     807  Ch2983      
2000 08  01.26710  21 17 10.28   -17 29 47.5         49673     807  Ch2983      
2000 08  07.23483  21 16 42.21   -17 32 26.9   23.1R 49673     809  Cb9109      
2000 08  07.29626  21 16 41.92   -17 32 28.4   23.1R 49673     809  Cb9109      
2000 08  07.36306  21 16 41.63   -17 32 30.2   23.4R 49673     809  Cb9109      
2000 08  08.17276  21 16 37.79   -17 32 51.8   23.6R 49673     809  Cb9109      
2000 08  08.22057  21 16 37.55   -17 32 53.1   23.6R 49673     809  Cb9109      
2000 08  08.26797  21 16 37.32   -17 32 54.3   23.4R 49673     809  Cb9109      
2001 06  27.32590  21 25 10.83   -17 21 27.6         49673     304  Cd2245      
2001 06  28.29190  21 25 07.75   -17 21 49.3         49673     304  Cd2245      
2001 06  28.41092  21 25 07.36   -17 21 51.8         49673     304  Cd2245      
2002 08  11.17743  21 27 43.88   -17 46 55.6   21.7R 49673     807  Cg2701      
2002 08  12.09986  21 27 39.54   -17 47 20.9         49673     807  Cg2701      
2002 08  12.19550  21 27 39.07   -17 47 23.7         49673     807  Cg2701      
2013 10  05.20116  22 28 07.56   -18 38 37.0   23.5R 49673     695  C~0zpx      
2013 10  05.29007  22 28 07.20   -18 38 38.8         49673     695  C~0zpx      
2013 10  06.24470  22 28 03.83   -18 38 54.5         49673     695  C~0zpx      

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    -0.15       0.00    -0.67
  2   0.0001      0.00     0.04       0.00     1.05
  3   0.0002      0.00     0.12       0.00     0.95
  4   0.1498      0.00    -0.09       0.00    -0.02
  5   0.1499      0.00    -0.14       0.00    -0.12
  6   0.1499      0.00     0.25       0.00    -0.21
  7   0.1526      0.00     0.51       0.00    -0.64
  8   0.1526      0.00     0.35       0.00    -0.27
  9   0.1526      0.00     0.77       0.00    -0.31
 10   1.0342      0.00    -0.30       0.00    -0.19
 11   1.0344      0.00    -0.20       0.00    -0.24
 12   1.0508      0.00    -0.34       0.00    -0.09
 13   1.0509      0.00    -0.27       0.00     0.04
 14   1.0511      0.00     0.17       0.00     0.01
 15   1.0533      0.00    -0.28       0.00     0.01
 16   1.0535      0.00    -0.44       0.00    -0.02
 17   1.0536      0.00    -0.47       0.00     0.04
 18   1.9381      0.00     0.30       0.00     0.16
 19   1.9407      0.00     0.13       0.00     0.04
 20   1.9410      0.00     0.16       0.00     0.21
 21   3.0602      0.00     0.10       0.00    -0.40
 22   3.0627      0.00     0.37       0.00    -0.22
 23   3.0630      0.00     0.22       0.00    -0.38
 24  14.2115      0.00     0.33       0.00     0.35
 25  14.2118      0.00    -0.19       0.00     0.02
 26  14.2144      0.00    -0.02       0.00    -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.

49673    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        43.282    43.282    43.282
ecceobj         0.107     0.107     0.107
incobj         22.518    22.518    22.518
qmin           38.098    38.113    38.088
qmax           48.529    48.544    48.508
amean          43.202    43.202    43.202
amin           42.861    42.863    42.862
amax           43.565    43.570    43.565
emean           0.101     0.101     0.101
emin            0.088     0.088     0.088
emax            0.114     0.114     0.114
imean          21.248    21.248    21.248
imin           20.812    20.803    20.805
imax           21.642    21.639    21.636
excite_mean     0.376     0.376     0.376
fracstop        1.000     1.000     1.000
cjmean          2.918     2.918     2.918

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       178.1     178.4     178.0
kozaiamp        180.0     180.0     180.0