Orbit Fit and Astrometric record for 99OA4

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: 99OA4     
# Created Mon Nov 19 02:07:37 2018
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   27 observations of   27
# Arc:   7.01y
# First observation: 1999/07/21
#  Last observation: 2006/07/24
# Chi-squared of fit:    73.19 DOF:   48 RMS:  0.29
# Min/Max residuals:    -0.80    0.69
# Exact a, adot, b, bdot, g, gdot:
  1.363227E-05  2.032822E-02 -6.941885E-07 -1.110300E-03  2.231138E-02  1.359276E-03
# Covariance matrix:
  2.0989E-13 -1.4592E-14  4.2867E-16 -5.9094E-16  3.7168E-13  7.2952E-14
 -1.4592E-14  4.5512E-13  1.8678E-14 -2.5013E-14  1.2826E-12  3.1485E-12
  4.2867E-16  1.8678E-14  1.1005E-13 -2.4351E-14  5.4128E-14  1.3235E-13
 -5.9094E-16 -2.5013E-14 -2.4351E-14  1.2162E-14 -7.2546E-14 -1.7724E-13
  3.7168E-13  1.2826E-12  5.4128E-14 -7.2546E-14  4.8975E-12  9.1266E-12
  7.2952E-14  3.1485E-12  1.3235E-13 -1.7724E-13  9.1266E-12  2.2310E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.021558  -43.016768    0.331015    0.000128   -0.958148  2451381.041183
# Heliocentric elements and errors
Epoch:              2451380.5000  =  1999/07/21
Mean Anomaly:          112.88393 +/-     0.161
Argument of Peri:       60.33567 +/-     0.128
Long of Asc Node:      136.96473 +/-     0.000
Inclination:             3.11896 +/-     0.000
Eccentricity:         0.06250942 +/-    0.0003
Semi-Major Axis:     44.55874749 +/-    0.0135
Time of Perihelion: 2417314.0006 +/-      51.1
Perihelion:          41.77340617 +/-    0.0178
Aphelion:            47.34408882 +/-    0.0190
Period (y)              297.4457 +/-      0.13
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           33.25346932 +/-    0.0032
Ecliptic Y          -31.47063391 +/-    0.0030
Ecliptic Z            0.01684646 +/-    0.0000
Ecliptic XDOT         0.00182031 +/-    0.0000
Ecliptic YDOT         0.00171854 +/-    0.0000
Ecliptic ZDOT        -0.00013614 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   45.78417824 +/-    0.0032
Geocenter to KBO     44.82015924 +/-    0.0044
# Hcoef:  7.90

The following table shows the complete astrometric record for 99OA4. 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 (99OA4) followed by the observatory code and reference code for the source of the astrometry.

1999 07  21.54044  21 17 42.59   -15 43 30.6   24.3R 99OA4     568  Ca5927      
1999 07  21.56743  21 17 42.48   -15 43 30.6         99OA4     568  Ca5927      
1999 07  21.59867  21 17 42.36   -15 43 31.4         99OA4     568  Ca5927      
1999 08  09.37583  21 16 21.65   -15 49 51.3   23.9R 99OA4     675  Ca5927      
1999 08  09.38318  21 16 21.67   -15 49 52.0   24.5R 99OA4     675  Ca5927      
1999 08  09.40595  21 16 21.54   -15 49 52.1   23.9R 99OA4     675  Ca5927      
1999 08  09.41334  21 16 21.54   -15 49 52.8   24.1R 99OA4     675  Ca5927      
1999 08  09.43602  21 16 21.46   -15 49 53.4   24.3R 99OA4     675  Ca5927      
2000 08  03.18560  21 21 27.16   -15 30 23.3   23.6R 99OA4     809  Cb9102      
2000 08  03.29148  21 21 26.66   -15 30 25.3         99OA4     809  Cb9102      
2000 08  03.31839  21 21 26.56   -15 30 26.3   24.7R 99OA4     809  Cb9102      
2000 08  05.44974  21 21 17.34   -15 31 11.2   24.2R 99OA4     568  Cb9102      
2000 08  05.49114  21 21 17.12   -15 31 11.9   23.7R 99OA4     568  Cb9102      
2000 08  05.53261  21 21 16.92   -15 31 12.7         99OA4     568  Cb9102      
2000 08  06.43790  21 21 13.03   -15 31 31.5         99OA4     568  Cb9102      
2000 08  06.48026  21 21 12.83   -15 31 32.5         99OA4     568  Cb9102      
2000 08  06.52202  21 21 12.63   -15 31 33.4         99OA4     568  Cb9102      
2001 08  11.31470  21 25 32.62   -15 15 16.7         99OA4     807  Cg0818      
2001 08  11.35089  21 25 32.44   -15 15 17.3         99OA4     807  Cg0818      
2002 09  03.24883  21 28 34.53   -15 05 03.5         99OA4     309  Cg0818      
2002 09  03.28766  21 28 34.38   -15 05 04.3         99OA4     309  Cg0818      
2002 09  03.29517  21 28 34.34   -15 05 04.3         99OA4     309  Cg0818      
2002 09  03.32699  21 28 34.21   -15 05 04.8         99OA4     309  Cg0818      
2006 07  24.70601  21 49 41.70   -13 35 02.6   23.9R 99OA4     250  S~06AK      
2006 07  24.71041  21 49 41.67   -13 35 02.7         99OA4     250  S~06AK      
2006 07  24.71481  21 49 41.66   -13 35 02.8         99OA4     250  S~06AK      
2006 07  24.71921  21 49 41.64   -13 35 02.9         99OA4     250  S~06AK      

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     0.16       0.00     0.03
  2   0.0001      0.00     0.21       0.00     0.55
  3   0.0002      0.00     0.37       0.00     0.35
  4   0.0516      0.00    -0.80       0.00     0.69
  5   0.0516      0.00    -0.01       0.00     0.14
  6   0.0517      0.00    -0.44       0.00     0.51
  7   0.0517      0.00     0.06       0.00    -0.04
  8   0.0517      0.00     0.37       0.00    -0.17
  9   1.0367      0.00    -0.02       0.00    -0.09
 10   1.0370      0.00    -0.52       0.00     0.11
 11   1.0370      0.00    -0.24       0.00    -0.33
 12   1.0429      0.00     0.44       0.00    -0.54
 13   1.0430      0.00    -0.10       0.00    -0.38
 14   1.0431      0.00    -0.35       0.00    -0.32
 15   1.0456      0.00     0.44       0.00    -0.16
 16   1.0457      0.00     0.26       0.00    -0.27
 17   1.0458      0.00     0.04       0.00    -0.30
 18   2.0582      0.00     0.01       0.00    -0.20
 19   2.0583      0.00    -0.30       0.00    -0.04
 20   3.1204      0.00     0.14       0.00    -0.04
 21   3.1205      0.00     0.26       0.00    -0.08
 22   3.1205      0.00     0.11       0.00     0.06
 23   3.1206      0.00     0.09       0.00     0.18
 24   7.0094      0.00     0.16       0.00    -0.00
 25   7.0094      0.00    -0.04       0.00    -0.01
 26   7.0094      0.00     0.07       0.00    -0.02
 27   7.0094      0.00     0.02       0.00    -0.03

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.

99OA4    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        44.486    44.486    44.486
ecceobj         0.063     0.063     0.063
incobj          3.120     3.120     3.120
qmin           40.810    40.823    40.800
qmax           48.299    48.276    48.324
amean          44.447    44.447    44.447
amin           44.095    44.095    44.097
amax           44.816    44.820    44.816
emean           0.063     0.063     0.063
emin            0.049     0.048     0.049
emax            0.078     0.078     0.079
imean           2.252     2.252     2.252
imin            1.647     1.647     1.647
imax            2.908     2.908     2.908
excite_mean     0.075     0.075     0.075
fracstop        1.000     1.000     1.000
cjmean          3.100     3.100     3.100

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       186.9     186.9     186.8
kozaiamp        180.0     179.9     180.0