Orbit Fit and Astrometric record for 94TA

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: 94TA      
# Created Sat Oct 21 01:36:55 2017
# Orbit generated from Bernstein formalism
# Fitting   26 observations of   27
# Arc:   4.05y
# First observation: 1994/10/02
#  Last observation: 1998/10/19
Preliminary a, adot, b, bdot, g, gdot:
  -0.000014   0.108623  -0.000001  -0.004889   0.067621   0.000000
# Chi-squared of fit:   313.23 DOF:   46 RMS:  0.61
# Min/Max residuals:    -1.44    0.99
# Exact a, adot, b, bdot, g, gdot:
  2.750683E-05  1.170307E-01 -5.511416E-06 -5.172394E-03  7.161877E-02  3.611723E-02
# Covariance matrix:
  1.2596E-13 -6.8072E-14 -1.1101E-15  6.9748E-16  6.7482E-14 -6.6541E-14
 -6.8072E-14  5.1724E-13  2.1284E-15 -2.1832E-14  2.4060E-13  1.4207E-12
 -1.1101E-15  2.1284E-15  9.7343E-14 -3.8782E-14 -1.9261E-15  5.5792E-15
  6.9748E-16 -2.1832E-14 -3.8782E-14  4.1639E-14 -1.3006E-14 -6.5581E-14
  6.7482E-14  2.4060E-13 -1.9261E-15 -1.3006E-14  3.7372E-13  7.8147E-13
 -6.6541E-14  1.4207E-12  5.5792E-15 -6.5581E-14  7.8147E-13  4.2509E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
   -5.023004   18.583496    0.157630   -0.086611   -0.985391  2449627.978908
# Heliocentric elements and errors
Epoch:              2449620.5000  =  1994/09/25
Mean Anomaly:           52.77760 +/-     0.003
Argument of Peri:      153.77808 +/-     0.004
Long of Asc Node:      137.68367 +/-     0.001
Inclination:             5.39893 +/-     0.000
Eccentricity:         0.30339293 +/-    0.0000
Semi-Major Axis:     16.75902362 +/-    0.0005
Time of Perihelion: 2445946.6739 +/-       0.1
Perihelion:          11.67445432 +/-    0.0005
Aphelion:            21.84359291 +/-    0.0007
Period (y)               68.6090 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           14.17207609 +/-    0.0001
Ecliptic Y            4.59166533 +/-    0.0000
Ecliptic Z           -1.22259043 +/-    0.0000
Ecliptic XDOT        -0.00013217 +/-    0.0000
Ecliptic YDOT         0.00467100 +/-    0.0000
Ecliptic ZDOT        -0.00031802 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   14.94743652 +/-    0.0001
Geocenter to KBO     13.96282103 +/-    0.0001
# Hcoef: 11.43

The following table shows the complete astrometric record for 94TA. 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 (94TA) followed by the observatory code and reference code for the source of the astrometry.

1994 10  02.4782   01 16 12.66   +02 38 00.9   22.5R 94TA      568  A24037      
1994 10  02.5031   01 16 12.38   +02 37 58.9         94TA      568  A24037      
1994 10  02.5308   01 16 12.06   +02 37 56.7         94TA      568  A24037      
1994 10  03.5934   01 16 00.13   +02 36 34.8         94TA      568  A24037      
1994 10  03.5994   01 16 00.08   +02 36 34.6         94TA      568  A24037      
1994 10  03.6052   01 16 00.00   +02 36 33.9         94TA      568  A24037      
1994 10  04.48275  01 15 49.93   +02 35 29.2         94TA      568  C24037      
1994 10  04.58204  01 15 48.77   +02 35 21.6         94TA      568  C24037      
1994 10  05.48008  01 15 38.54   +02 34 14.0         94TA      568  C24037      
1994 10  05.54387  01 15 37.79   +02 34 09.2         94TA      568  C24037      
1994 11  01.32785  01 10 34.99   +02 03 18.6   23. R 94TA      568  A24155      
1994 11  01.35657  01 10 34.69   +02 03 16.7         94TA      568  A24155      
1994 12  02.32758  01 06 19.82   +01 42 46.0         94TA      568  A24290      
1994 12  02.40517  01 06 19.37   +01 42 44.8         94TA      568  A24290      
1995 12  23.28896  01 28 52.55   +03 48 04.4         94TA      568  C26491      
1995 12  23.32233  01 28 52.46   +03 48 04.3         94TA      568  C26491      
1995 12  23.35326  01 28 52.39   +03 48 04.9         94TA      568  C26491      
1995 12  24.27589  01 28 50.74   +03 48 12.0         94TA      568  C26491      
1995 12  24.30691  01 28 50.67   +03 48 12.1         94TA      568  C26491      
1996 09  12.5933   02 06 29.97   +07 04 44.7         94TA      568  C27786      
1996 09  12.6298   02 06 29.71   +07 04 42.7         94TA      568  C27786      
1997 09  07.07656  02 28 25.74   +08 53 15.5   23.3R 94TA      950  C30629      
1997 09  07.12968  02 28 25.41   +08 53 12.4         94TA      950  C30629      
1997 09  07.20546  02 28 25.05   +08 53 09.7         94TA      950  C30629      
1997 09  07.23010  02 28 24.92   +08 53 09.1         94TA      950  C30629      
1998 10  19.00110  02 43 14.92   +09 52 01.4   23.5R 94TA      950  Ca2533      
1998 10  19.19807  02 43 12.88   +09 51 49.3         94TA      950  Ca2533      

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    -0.34       0.00     0.90
  2   0.0001     -4.64    -0.29      -0.27     0.75
  3   0.0001     -9.91    -0.34      -0.50     0.66
  4   0.0031   -206.36     0.60      -8.86    -1.40
  5   0.0031   -207.13     0.96      -8.76    -1.27
  6   0.0031   -208.51     0.68      -8.96    -1.44
  7   0.0055   -372.66    -0.37     -11.91     0.66
  8   0.0058   -391.63    -0.51     -12.39     0.61
  9   0.0082   -559.10    -0.50     -17.11     0.70
 10   0.0084   -571.32    -0.58     -17.32     0.74
 11   0.0817  -5473.70     0.08     -15.30     0.99
 12   0.0818  -5478.58     0.14     -15.36     0.74
 13   0.1666  -9486.45     0.50     292.72    -0.38
 14   0.1668  -9493.16     0.23     294.17    -0.11
 15   1.2233  12139.58     0.03    -385.47    -0.42
 16   1.2234  12138.29    -0.34    -385.06    -0.64
 17   1.2235  12137.54    -0.25    -384.11    -0.26
 18   1.2260  12117.23    -0.02    -368.25    -0.64
 19   1.2261  12116.29    -0.22    -367.76    -0.74
 20   1.9469  48682.68     0.40   -1852.22    -0.60
 21   1.9470  48678.11     0.56   -1852.70    -0.62
 22   2.9311  71015.52     0.30   -2753.52     0.23
 23   2.9313  71009.19    -0.87   -2754.78    -0.26
 24   2.9315  71002.55    -0.10   -2755.49     0.14
 25   2.9316  71000.29     0.07   -2755.37     0.62
 26   4.0452  86574.99 (  -0.45)  -4086.04 (   2.33)
 27   4.0458  86536.81     0.16   -4087.19     0.83

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.

94TA    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        16.858    16.859    16.856
ecceobj         0.301     0.301     0.301
incobj          5.396     5.396     5.396
qmin           10.442    11.290     9.990
qmax           22.890    21.939    22.807
amean          16.434    16.654    16.422
amin           13.164    16.036    14.673
amax           16.955    16.875    16.877
emean           0.295     0.290     0.298
emin            0.207     0.276     0.277
emax            0.350     0.305     0.377
imean           4.696     4.380     4.255
imin            4.063     4.063     3.095
imax            7.953     4.864     5.051
excite_mean     0.307     0.300     0.307
fracstop        0.004     0.003     0.003
cjmean          3.242     3.227     3.241

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       177.2     160.1     180.4
kozaiamp        154.9      28.4     100.0