Orbit Fit and Astrometric record for 76803

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: 76803     
# Created Mon Dec 11 02:36:29 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   31 observations of   31
# Arc:   7.86y
# First observation: 2000/07/31
#  Last observation: 2008/06/09
# Chi-squared of fit:    90.76 DOF:   56 RMS:  0.30
# Min/Max residuals:    -1.21    0.69
# Exact a, adot, b, bdot, g, gdot:
  1.379054E-05  2.660111E-02 -1.107279E-05 -1.776106E-02  2.914356E-02  2.837272E-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
    0.960073  -54.074062   -0.033381    0.016820   -1.014169  2451756.624613
# Heliocentric elements and errors
Epoch:              2451756.5000  =  2000/07/31
Mean Anomaly:           40.79476 +/-     0.000
Argument of Peri:      127.38312 +/-     0.000
Long of Asc Node:      127.38656 +/-     0.000
Inclination:            33.76571 +/-     0.000
Eccentricity:         0.12073859 +/-    0.0000
Semi-Major Axis:     38.57721547 +/-    0.0000
Time of Perihelion: 2441839.1272 +/-       0.0
Perihelion:          33.91945684 +/-    0.0000
Aphelion:            43.23497410 +/-    0.0000
Period (y)              239.6098 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           20.75824672 +/-    0.0000
Ecliptic Y          -28.57918293 +/-    0.0000
Ecliptic Z            0.57455038 +/-    0.0000
Ecliptic XDOT         0.00218928 +/-    0.0000
Ecliptic YDOT         0.00123339 +/-    0.0000
Ecliptic ZDOT        -0.00166369 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   35.32705710 +/-    0.0000
Geocenter to KBO     34.31288188 +/-    0.0000
# Hcoef:  7.30

The following table shows the complete astrometric record for 76803. 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 (76803) followed by the observatory code and reference code for the source of the astrometry.

2000 07  31.12387  20 32 12.19   -17 51 36.0   21.4R 76803     807  Cc0967      
2000 07  31.19562  20 32 11.78   -17 51 38.4         76803     807  Cc0967      
2000 08  05.34368  20 31 42.44   -17 54 18.5   22.6R 76803     568  Cb8005      
2000 08  05.39259  20 31 42.17   -17 54 20.0   22.2R 76803     568  Cb8005      
2000 08  05.43348  20 31 41.93   -17 54 21.1   22.3R 76803     568  Cb8005      
2000 08  06.33657  20 31 36.83   -17 54 49.3   22.4R 76803     568  Cb8005      
2000 08  06.37780  20 31 36.60   -17 54 50.7   22.1R 76803     568  Cb8005      
2000 08  06.41951  20 31 36.37   -17 54 51.9   22.2R 76803     568  Cb8005      
2000 09  21.15474  20 28 08.56   -18 15 38.3   22.3R 76803     695  Ch1299      
2000 09  21.21511  20 28 08.39   -18 15 39.6         76803     695  Ch1299      
2000 09  23.24918  20 28 02.85   -18 16 22.2   22.5R 76803     568  Cc0967      
2000 09  23.29902  20 28 02.72   -18 16 23.3   22.7R 76803     568  Cc0967      
2000 09  23.34696  20 28 02.59   -18 16 24.3   23.0R 76803     568  Cc0967      
2000 09  24.25098  20 28 00.29   -18 16 42.3   22.7R 76803     568  Cc0967      
2000 09  24.30045  20 28 00.16   -18 16 43.3   22.6R 76803     568  Cc0967      
2000 09  24.35897  20 28 00.01   -18 16 44.5   23.0R 76803     568  Cc0967      
2001 07  18.43741  20 40 40.599  -18 20 58.52        76803     568  Cl6260      
2001 07  19.44234  20 40 34.943  -18 21 29.95        76803     568  Cl6260      
2001 07  26.35103  20 39 55.96   -18 25 07.8         76803     568  Cd7642      
2001 07  26.41046  20 39 55.62   -18 25 09.8   23.0R 76803     568  Cd7642      
2001 07  26.47112  20 39 55.26   -18 25 11.7   22.6R 76803     568  Cd7642      
2001 08  22.89868  20 37 22.95   -18 39 22.5   22.8R 76803     493  Cd7642      
2001 08  22.93308  20 37 22.80   -18 39 23.5   22.5R 76803     493  Cd7642      
2002 06  15.40130  20 50 30.36   -18 39 25.3   22.5R 76803     695  Cf8836      
2002 06  15.43413  20 50 30.20   -18 39 25.8   22.4R 76803     695  Cf8836      
2003 10  23.09315  20 48 48.48   -20 07 46.9   22.2R 76803     695  Cj3635      
2003 10  24.09751  20 48 48.56   -20 07 52.5         76803     695  Cj3635      
2004 07  15.99641  21 02 37.10   -20 00 17.9   22.1R 76803     586  Cl0791      
2008 06  07.35317  21 33 52.93   -21 33 17.1         76803     807  Cz1581      
2008 06  07.41311  21 33 52.86   -21 33 18.6         76803     807  Cz1581      
2008 06  09.39811  21 33 49.32   -21 34 15.8         76803     807  Cz1581      

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    -1.21
  2   0.0002      0.00     0.23       0.00     0.18
  3   0.0143      0.00    -0.15       0.00     0.06
  4   0.0144      0.00     0.03       0.00     0.08
  5   0.0145      0.00    -0.04       0.00     0.24
  6   0.0170      0.00    -0.10       0.00    -0.03
  7   0.0171      0.00     0.00       0.00    -0.15
  8   0.0172      0.00     0.15       0.00    -0.06
  9   0.1425      0.00    -0.10       0.00    -0.41
 10   0.1426      0.00    -0.00       0.00    -0.42
 11   0.1482      0.00    -0.07       0.00    -0.40
 12   0.1483      0.00     0.01       0.00    -0.47
 13   0.1485      0.00     0.02       0.00    -0.49
 14   0.1509      0.00     0.21       0.00    -0.02
 15   0.1511      0.00     0.21       0.00    -0.02
 16   0.1512      0.00     0.25       0.00    -0.04
 17   0.9646      0.00     0.69       0.00     0.09
 18   0.9673      0.00    -0.23       0.00     0.16
 19   0.9862      0.00    -0.19       0.00     0.62
 20   0.9864      0.00    -0.13       0.00     0.51
 21   0.9866      0.00    -0.26       0.00     0.54
 22   1.0617      0.00    -0.01       0.00     0.24
 23   1.0618      0.00     0.45       0.00     0.25
 24   1.8734      0.00     0.43       0.00    -0.38
 25   1.8735      0.00    -0.19       0.00    -0.05
 26   3.2278      0.00    -0.04       0.00     0.22
 27   3.2306      0.00     0.06       0.00     0.29
 28   3.9586      0.00     0.24       0.00    -0.05
 29   7.8528      0.00    -0.34       0.00    -0.23
 30   7.8529      0.00     0.20       0.00    -0.02
 31   7.8584      0.00     0.11       0.00     0.00

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.

76803    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        38.640    38.640    38.639
ecceobj         0.122     0.122     0.122
incobj         33.740    33.740    33.740
qmin           33.073    33.025    33.224
qmax           44.557    44.464    44.382
amean          38.658    38.608    38.653
amin           38.340    38.264    38.324
amax           39.009    39.006    39.032
emean           0.124     0.122     0.120
emin            0.106     0.103     0.102
emax            0.143     0.141     0.138
imean          32.314    32.301    32.338
imin           31.820    31.848    31.870
imax           32.787    32.766    32.845
excite_mean     0.549     0.548     0.548
fracstop        1.000     1.000     1.000
cjmean          2.680     2.681     2.680

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       180.2     189.1     190.7
kozaiamp        180.0     179.9     179.9