Orbit Fit and Astrometric record for 79978

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: 79978     
# Created Fri Oct 20 01:36:25 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   31 observations of   31
# Arc:  16.16y
# First observation: 1999/02/15
#  Last observation: 2015/04/15
# Chi-squared of fit:    46.22 DOF:   56 RMS:  0.22
# Min/Max residuals:    -0.32    0.60
# Exact a, adot, b, bdot, g, gdot:
  1.551174E-05  2.461199E-02 -4.799733E-06 -7.185529E-03  2.429268E-02  4.244338E-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
    9.535977  127.621996   -0.321282    0.155716   -0.928287  2451224.832353
# Heliocentric elements and errors
Epoch:              2451224.5000  =  1999/02/15
Mean Anomaly:           28.16624 +/-     0.000
Argument of Peri:      100.72889 +/-     0.000
Long of Asc Node:      336.91953 +/-     0.000
Inclination:            18.78547 +/-     0.000
Eccentricity:         0.27682302 +/-    0.0000
Semi-Major Axis:     53.85029029 +/-    0.0000
Time of Perihelion: 2439931.5656 +/-       0.0
Perihelion:          38.94329033 +/-    0.0000
Aphelion:            68.75729025 +/-    0.0000
Period (y)              395.1757 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -25.60300867 +/-    0.0000
Ecliptic Y           32.70330096 +/-    0.0000
Ecliptic Z            6.81942570 +/-    0.0000
Ecliptic XDOT        -0.00256865 +/-    0.0000
Ecliptic YDOT        -0.00120438 +/-    0.0000
Ecliptic ZDOT        -0.00071939 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   42.08936131 +/-    0.0000
Geocenter to KBO     41.16458966 +/-    0.0000
# Hcoef:  5.70

The following table shows the complete astrometric record for 79978. 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 (79978) followed by the observatory code and reference code for the source of the astrometry.

1999 02  15.33161  08 51 05.25   +27 33 42.3   21.4R 79978     568  Cb6454      
1999 02  15.41713  08 51 04.79   +27 33 43.2   21.4R 79978     568  Cb6454      
1999 02  19.30206  08 50 44.93   +27 34 21.8   21.4R 79978     568  Cb6454      
1999 02  19.31366  08 50 44.87   +27 34 21.9   21.4R 79978     568  Cb6454      
1999 03  09.43653  08 49 21.82   +27 35 59.7   21.4R 79978     568  Cb6454      
1999 03  09.45288  08 49 21.75   +27 35 59.7   21.4R 79978     568  Cb6454      
1999 04  11.36529  08 47 53.88   +27 32 37.8   21.5R 79978     568  Cb6454      
1999 04  12.36284  08 47 52.80   +27 32 23.7   21.5R 79978     568  Cb6454      
1999 05  06.29861  08 47 57.53   +27 24 55.6   21.8R 79978     568  Cb6454      
1999 05  06.34551  08 47 57.60   +27 24 54.5   21.8R 79978     568  Cb6454      
2000 04  06.31194  08 53 29.56   +26 47 29.4   22.1R 79978     568  Cb6454      
2000 04  06.42113  08 53 29.37   +26 47 28.2   22.2R 79978     568  Cb6454      
2000 05  06.23947  08 53 24.12   +26 39 13.5   22.2R 79978     568  Cb6454      
2000 05  06.28541  08 53 24.18   +26 39 12.3   22.2R 79978     568  Cb6454      
2000 05  06.32940  08 53 24.25   +26 39 11.5   22.3R 79978     568  Cb6454      
2001 01  21.29473  09 04 11.72   +25 52 17.7   21.3R 79978     675  Cc4897      
2001 01  21.37358  09 04 11.31   +25 52 19.2   21.3R 79978     675  Cc4897      
2001 01  21.42040  09 04 11.07   +25 52 20.2   21.3R 79978     675  Cc4897      
2004 03  22.18569  09 15 04.61   +23 40 07.7   22.8R 79978     662  Ck1971      
2004 03  22.25648  09 15 04.31   +23 40 08.3         79978     662  Ck1971      
2004 12  13.409111 09 27 04.92   +22 26 13.9   21.7V 79978     645  C~1PwO      
2004 12  13.409940 09 27 04.92   +22 26 13.9   21.4V 79978     645  C~1PwO      
2004 12  13.412428 09 27 04.91   +22 26 14.0   22.6V 79978     645  C~1PwO      
2007 02  16.26017  09 32 10.68   +21 09 22.8         79978     695  Cu2667      
2007 02  16.34289  09 32 10.27   +21 09 24.2         79978     695  Cu2667      
2007 02  16.44940  09 32 09.73   +21 09 26.0         79978     695  Cu2667      
2007 11  08.52515  09 41 15.30   +19 57 30.3         79978     695  Cy4396      
2007 11  09.50167  09 41 16.58   +19 57 28.3         79978     695  Cy4396      
2015 04  15.16462  10 03 20.86   +14 57 28.2   22.1R 79978     695  C~1RU3      
2015 04  15.23491  10 03 20.69   +14 57 28.5         79978     695  C~1RU3      
2015 04  15.31397  10 03 20.51   +14 57 28.8         79978     695  C~1RU3      

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    -0.10       0.00     0.18
  2   0.0002      0.00     0.04       0.00    -0.04
  3   0.0109      0.00    -0.23       0.00    -0.17
  4   0.0109      0.00    -0.23       0.00    -0.18
  5   0.0605      0.00     0.12       0.00    -0.10
  6   0.0606      0.00     0.08       0.00    -0.12
  7   0.1507      0.00     0.08       0.00     0.07
  8   0.1534      0.00     0.09       0.00    -0.32
  9   0.2189      0.00    -0.09       0.00    -0.31
 10   0.2191      0.00     0.00       0.00    -0.31
 11   1.1389      0.00    -0.30       0.00    -0.12
 12   1.1392      0.00    -0.29       0.00    -0.15
 13   1.2208      0.00     0.13       0.00     0.37
 14   1.2210      0.00     0.17       0.00     0.21
 15   1.2211      0.00     0.38       0.00     0.41
 16   1.9328      0.00    -0.07       0.00     0.16
 17   1.9330      0.00    -0.05       0.00     0.15
 18   1.9332      0.00     0.02       0.00     0.26
 19   5.0975      0.00     0.59       0.00     0.13
 20   5.0977      0.00    -0.30       0.00     0.60
 21   5.8264      0.00     0.07       0.00    -0.24
 22   5.8264      0.00     0.10       0.00    -0.25
 23   5.8264      0.00     0.04       0.00    -0.19
 24   8.0025      0.00     0.31       0.00     0.20
 25   8.0028      0.00     0.34       0.00     0.15
 26   8.0031      0.00     0.17       0.00     0.11
 27   8.7288      0.00    -0.08       0.00     0.01
 28   8.7315      0.00    -0.08       0.00    -0.01
 29  16.1611      0.00    -0.06       0.00    -0.10
 30  16.1613      0.00    -0.15       0.00    -0.11
 31  16.1615      0.00    -0.12       0.00    -0.15

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.

79978    quality flag:3

Type:     12:5EEEEEE12:5EEEEEE12:5EEEEEE

axisobj        54.069    54.069    54.068
ecceobj         0.279     0.279     0.279
incobj         18.768    18.768    18.768
qmin           38.262    38.260    38.362
qmax           70.482    70.404    70.350
amean          53.972    53.972    53.972
amin           53.421    53.428    53.416
amax           54.635    54.644    54.653
emean           0.278     0.278     0.277
emin            0.266     0.265     0.266
emax            0.291     0.290     0.288
imean          19.661    19.661    19.677
imin           19.320    19.353    19.428
imax           20.000    19.982    19.935
excite_mean     0.436     0.436     0.436
fracstop        1.000     1.000     1.000
cjmean          2.980     2.980     2.980

libcent 0       184.9     184.0     187.1
libamp  0       140.0     140.4     145.5
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       177.9     177.2     182.5
kozaiamp        180.0     180.0     179.9