Orbit Fit and Astrometric record for 52975

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: 52975     
# Created Sat Nov 29 02:36:33 2014
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   29 observations of   29
# Arc:   9.96y
# First observation: 1998/10/12
#  Last observation: 2008/09/25
# Chi-squared of fit:   148.98 DOF:   52 RMS:  0.40
# Min/Max residuals:    -0.78    1.40
# Exact a, adot, b, bdot, g, gdot:
  2.576809E-05  9.019692E-02  5.632752E-06  2.036542E-02  5.730652E-02  2.570481E-02
# 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
   -1.156251   48.575179    0.486855   -0.017634   -0.862333  2451098.935271
# Heliocentric elements and errors
Epoch:              2451098.5000  =  1998/10/12
Mean Anomaly:           23.85348 +/-     0.000
Argument of Peri:      301.48332 +/-     0.000
Long of Asc Node:       51.95505 +/-     0.000
Inclination:            12.62018 +/-     0.000
Eccentricity:         0.38412311 +/-    0.0000
Semi-Major Axis:     26.41006254 +/-    0.0000
Time of Perihelion: 2447813.7541 +/-       0.0
Perihelion:          16.26534706 +/-    0.0000
Aphelion:            36.55477802 +/-    0.0000
Period (y)              135.7258 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           12.48701437 +/-    0.0000
Ecliptic Y           13.40567086 +/-    0.0000
Ecliptic Z           -0.35201627 +/-    0.0000
Ecliptic XDOT        -0.00240594 +/-    0.0000
Ecliptic YDOT         0.00379558 +/-    0.0000
Ecliptic ZDOT         0.00094795 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   18.32368280 +/-    0.0000
Geocenter to KBO     17.44993208 +/-    0.0000
# Hcoef:  9.33

The following table shows the complete astrometric record for 52975. 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 (52975) followed by the observatory code and reference code for the source of the astrometry.

1998 10  12.43454  03 05 47.77   +16 14 29.8   22.5V 52975     691  Ca4828      
1998 10  12.45637  03 05 47.57   +16 14 28.9   22.5V 52975     691  Ca4828      
1998 10  12.47876  03 05 47.37   +16 14 27.9   22.1V 52975     691  Ca4828      
1998 10  18.36511  03 04 54.09   +16 11 49.3   21.9V 52975     691  Ca4828      
1998 10  18.38773  03 04 53.91   +16 11 48.7   21.9V 52975     691  Ca4828      
1998 10  18.41832  03 04 53.59   +16 11 47.5   21.8V 52975     691  Ca4828      
1998 10  28.39461  03 03 15.66   +16 06 49.2   22.3V 52975     691  C48547      
1998 10  28.41605  03 03 15.42   +16 06 48.3   22.3V 52975     691  C48547      
1998 10  28.43854  03 03 15.20   +16 06 47.4   22.4V 52975     691  C48547      
1999 10  16.37780  03 24 27.73   +18 38 35.7   22.1V 52975     691  Ca7321      
1999 10  16.41973  03 24 27.41   +18 38 35.7   21.6V 52975     691  Ca7321      
1999 10  16.44738  03 24 27.18   +18 38 34.8   22.1V 52975     691  Ca7321      
1999 10  17.36925  03 24 19.12   +18 38 16.4   22.4V 52975     691  Ca7321      
1999 10  17.39804  03 24 18.96   +18 38 15.6   22.4V 52975     691  Ca7321      
1999 10  17.42572  03 24 18.64   +18 38 15.0   22.5V 52975     691  Ca7321      
1999 12  05.14678  03 16 08.70   +18 16 46.8   21.1R 52975     829  Cd2213      
1999 12  05.16484  03 16 08.50   +18 16 47.0         52975     829  Cd2213      
2000 01  02.18515  03 12 32.07   +18 07 48.3   21.5R 52975     697  Ca8493      
2000 01  02.32828  03 12 31.27   +18 07 46.5   21.6R 52975     697  Ca8493      
2000 01  03.23405  03 12 26.45   +18 07 37.1   21.5R 52975     697  Ca8493      
2000 11  28.30228  03 36 02.44   +20 34 42.6   21.1R 52975     695  Cc2187      
2000 11  28.35573  03 36 01.88   +20 34 41.3   21.1R 52975     695  Cc2187      
2000 11  29.28721  03 35 52.30   +20 34 18.1   21.2R 52975     695  Cc2187      
2002 10  30.40597  04 17 32.57   +24 30 33.1         52975     695  Ch3055      
2002 10  30.41891  04 17 32.45   +24 30 33.1         52975     695  Ch3055      
2002 10  30.46756  04 17 32.01   +24 30 32.8         52975     695  Ch3055      
2008 09  25.65865  05 56 27.98   +30 45 02.6   24.6R 52975     250  S~06FL      
2008 09  25.66560  05 56 27.99   +30 45 02.7         52975     250  S~06FM      
2008 09  25.67879  05 56 28.01   +30 45 02.7         52975     250  S~06FM      

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     0.06       0.00     1.05
  2   0.0001      0.00    -0.18       0.00    -0.36
  3   0.0001      0.00    -0.20       0.00    -0.78
  4   0.0162      0.00    -0.11       0.00     0.26
  5   0.0163      0.00     0.44       0.00     0.30
  6   0.0164      0.00     0.02       0.00    -0.02
  7   0.0437      0.00    -0.31       0.00     0.07
  8   0.0438      0.00    -0.59       0.00    -0.16
  9   0.0438      0.00    -0.40       0.00    -0.35
 10   1.0101      0.00    -0.08       0.00    -0.53
 11   1.0102      0.00     0.67       0.00     0.32
 12   1.0103      0.00     0.87       0.00    -0.01
 13   1.0128      0.00    -0.06       0.00     0.52
 14   1.0129      0.00     1.40       0.00     0.32
 15   1.0130      0.00     0.31       0.00     0.30
 16   1.1464      0.00     0.31       0.00     0.10
 17   1.1464      0.00    -0.05       0.00     0.76
 18   1.2231      0.00     0.39       0.00     0.25
 19   1.2235      0.00     0.37       0.00     0.07
 20   1.2260      0.00     0.40       0.00     0.10
 21   2.1297      0.00     0.08       0.00    -0.25
 22   2.1298      0.00     0.09       0.00    -0.20
 23   2.1324      0.00     0.16       0.00    -0.21
 24   4.0492      0.00    -0.44       0.00    -0.09
 25   4.0492      0.00    -0.49       0.00     0.00
 26   4.0494      0.00    -0.53       0.00     0.05
 27   9.9554      0.00    -0.01       0.00     0.11
 28   9.9555      0.00    -0.01       0.00     0.04
 29   9.9555      0.00     0.01       0.00    -0.29

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.

52975    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        26.435    26.435    26.435
ecceobj         0.384     0.384     0.384
incobj         12.613    12.613    12.613
qmin           15.875    16.054    15.810
qmax           36.607    36.608    36.749
amean          26.217    26.185    26.108
amin           25.478    25.603    25.693
amax           26.634    26.633    26.635
emean           0.374     0.374     0.382
emin            0.367     0.368     0.366
emax            0.384     0.384     0.394
imean          11.798    11.806    11.440
imin           11.545    11.707    10.524
imax           11.856    11.855    13.290
excite_mean     0.426     0.426     0.431
fracstop        0.002     0.002     0.012
cjmean          2.839     2.839     2.836

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       307.0     307.7     204.4
kozaiamp          6.3       7.0     179.2