Orbit Fit and Astrometric record for 78799

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: 78799     
# Created Wed Oct 18 01:36:25 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   29 observations of   29
# Arc:  18.76y
# First observation: 1989/12/17
#  Last observation: 2008/09/20
# Chi-squared of fit:   188.02 DOF:   52 RMS:  0.45
# Min/Max residuals:    -1.14    1.84
# Exact a, adot, b, bdot, g, gdot:
  1.490605E-05  2.203981E-02  5.552951E-06  5.498992E-03  2.491958E-02  5.166501E-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
    3.164098   58.406099   -0.446912    0.048392   -0.875575  2447877.700650
# Heliocentric elements and errors
Epoch:              2447878.5000  =  1989/12/18
Mean Anomaly:           98.12896 +/-     0.000
Argument of Peri:      248.60897 +/-     0.000
Long of Asc Node:       46.80974 +/-     0.000
Inclination:            14.33548 +/-     0.000
Eccentricity:         0.24623349 +/-    0.0000
Semi-Major Axis:     37.64439631 +/-    0.0000
Time of Perihelion: 2424882.9595 +/-       0.0
Perihelion:          28.37508529 +/-    0.0000
Aphelion:            46.91370734 +/-    0.0000
Period (y)              230.9717 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           21.07036511 +/-    0.0000
Ecliptic Y           35.11030741 +/-    0.0000
Ecliptic Z            2.21521806 +/-    0.0000
Ecliptic XDOT        -0.00178869 +/-    0.0000
Ecliptic YDOT         0.00172314 +/-    0.0000
Ecliptic ZDOT         0.00063467 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.00719411 +/-    0.0000
Geocenter to KBO     40.12900290 +/-    0.0000
# Hcoef:  5.29

The following table shows the complete astrometric record for 78799. 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 (78799) followed by the observatory code and reference code for the source of the astrometry.

1989 12  17.20000  03 41 36.65   +22 53 19.8         78799     261   j4694      
1993 12  11.22222  04 02 10.80   +25 09 17.2         78799     261   j4694      
2001 12  20.22024  04 41 18.00   +28 52 15.1         78799     644  Cj4694      
2001 12  20.31502  04 41 17.50   +28 52 14.8         78799     644  Cj4694      
2002 12  10.24664  04 47 13.56   +29 17 49.2         78799     644  Ch0145      
2002 12  10.31686  04 47 13.14   +29 17 48.9         78799     644  Ch0145      
2002 12  10.38447  04 47 12.79   +29 17 48.8         78799     644  Ch0145      
2003 01  04.25237  04 45 02.57   +29 13 59.4   20.8R 78799     675  Ch0145      
2003 01  04.29003  04 45 02.41   +29 13 59.0   20.8R 78799     675  Ch0145      
2003 01  05.27111  04 44 57.85   +29 13 48.6   20.8R 78799     675  Ch0145      
2003 01  05.30450  04 44 57.67   +29 13 48.3   20.7R 78799     675  Ch0145      
2003 02  07.08824  04 43 07.81   +29 08 01.3   22.3V 78799     291  Ch3301      
2003 02  07.21447  04 43 07.63   +29 08 00.3   22.3V 78799     291  Ch3301      
2003 02  07.28236  04 43 07.42   +29 07 59.3   22.3V 78799     291  Ch3301      
2003 02  21.90340  04 42 51.69   +29 05 51.5   22.2R 78799     621  Ch4226      
2003 02  22.92131  04 42 51.40   +29 05 43.3         78799     621  Ch4226      
2003 02  23.88080  04 42 51.32   +29 05 37.1         78799     621  Ch4226      
2003 03  22.81704  04 43 27.59   +29 03 28.3   22.0R 78799     621  Ch6164      
2003 03  23.81416  04 43 30.33   +29 03 25.3   22.1R 78799     621  Ch6164      
2003 11  22.27742  04 53 53.89   +29 42 27.1   20.7R 78799     695  Cj4694      
2003 11  23.30427  04 53 48.34   +29 42 24.1         78799     695  Cj4694      
2003 11  23.36000  04 53 48.03   +29 42 24.0         78799     695  Cj4694      
2003 11  23.41063  04 53 47.76   +29 42 23.8         78799     695  Cj4694      
2003 12  23.82900  04 50 59.69   +29 39 14.8   21.0R 78799     540  Cj4694      
2003 12  23.88766  04 50 59.42   +29 39 14.5   21.1R 78799     540  Cj4694      
2008 09  20.72393  05 21 45.81   +31 15 23.6   21.8R 78799     250  S~06GG      
2008 09  20.73018  05 21 45.81   +31 15 23.7         78799     250  S~06GG      
2008 09  20.73713  05 21 45.81   +31 15 23.8         78799     250  S~06GG      
2008 09  20.74338  05 21 45.81   +31 15 23.9         78799     250  S~06GG      

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    -0.00       0.00     0.55
  2   3.9836      0.00     0.49       0.00     0.31
  3  12.0083      0.00    -0.47       0.00    -0.05
  4  12.0085      0.00    -0.29       0.00     0.56
  5  12.9803      0.00     0.26       0.00    -0.15
  6  12.9805      0.00    -0.08       0.00     0.06
  7  12.9807      0.00     0.40       0.00     0.48
  8  13.0487      0.00    -0.06       0.00     0.14
  9  13.0488      0.00     0.23       0.00     0.14
 10  13.0515      0.00     0.40       0.00     0.07
 11  13.0516      0.00     0.05       0.00     0.13
 12  13.1414      0.00     0.88       0.00     0.05
 13  13.1417      0.00     1.84       0.00     0.28
 14  13.1419      0.00     0.62       0.00    -0.04
 15  13.1819      0.00    -0.05       0.00     0.13
 16  13.1847      0.00    -0.66       0.00    -0.31
 17  13.1874      0.00     0.11       0.00     0.62
 18  13.2611      0.00    -0.64       0.00     0.05
 19  13.2638      0.00    -1.13       0.00    -1.14
 20  13.9304      0.00    -0.22       0.00     0.05
 21  13.9332      0.00    -0.24       0.00     0.05
 22  13.9334      0.00    -0.29       0.00     0.12
 23  13.9335      0.00    -0.16       0.00     0.08
 24  14.0168      0.00    -0.69       0.00    -0.41
 25  14.0169      0.00    -0.01       0.00    -0.20
 26  18.7612      0.00     0.15       0.00    -0.10
 27  18.7612      0.00     0.15       0.00    -0.08
 28  18.7612      0.00     0.16       0.00    -0.07
 29  18.7612      0.00     0.16       0.00    -0.05

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.

78799    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        37.737    37.737    37.737
ecceobj         0.246     0.246     0.246
incobj         14.310    14.310    14.310
qmin           27.535    27.678    27.441
qmax           49.054    49.350    47.788
amean          37.979    38.038    37.402
amin           37.135    37.136    35.882
amax           38.977    39.291    38.493
emean           0.254     0.255     0.245
emin            0.237     0.240     0.200
emax            0.267     0.268     0.260
imean          13.510    13.488    13.620
imin           12.894    12.974    12.914
imax           14.358    14.210    15.148
excite_mean     0.345     0.345     0.340
fracstop        0.020     0.022     0.026
cjmean          2.900     2.900     2.900

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       278.3     275.8     277.2
kozaiamp         32.6      29.8      30.6