Orbit Fit and Astrometric record for 17OG69

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: 17OG69    
# Created Tue Nov 30 02:14:04 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     39 observations of     39
# Arc:  12.37y
# First observation: 2008/08/28
#  Last observation: 2021/01/11
# Chi-squared of fit:    40.62 DOF:     72 RMS:  0.18
# Min/Max residuals:    -0.44    0.59
# Exact a, adot, b, bdot, g, gdot:
  1.710641E-05  2.851119E-02 -2.312294E-06 -3.903619E-03  2.712384E-02  1.439043E-03
# Covariance matrix:
  1.8573E-13 -2.6620E-14  4.6776E-16  1.7937E-15  1.8953E-14 -3.8752E-14
 -2.6620E-14  3.4030E-14  6.8863E-15 -4.8407E-15  3.4072E-14  9.2866E-14
  4.6776E-16  6.8863E-15  1.7094E-13 -1.6144E-14  1.4341E-14  1.8512E-14
  1.7937E-15 -4.8407E-15 -1.6144E-14  2.4708E-15 -4.9378E-15 -1.3955E-14
  1.8953E-14  3.4072E-14  1.4341E-14 -4.9378E-15  1.1128E-13  8.4207E-14
 -3.8752E-14  9.2866E-14  1.8512E-14 -1.3955E-14  8.4207E-14  2.6965E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
  -24.259278   31.637974    0.833456   -0.232014   -0.514918  2454707.117684
# Heliocentric elements and errors
Epoch:              2454706.5000  =  2008/08/28
Mean Anomaly:           21.47862 +/-     0.015
Argument of Peri:      227.04053 +/-     0.018
Long of Asc Node:      140.11238 +/-     0.000
Inclination:            25.22870 +/-     0.000
Eccentricity:         0.07344235 +/-    0.0000
Semi-Major Axis:     40.09991752 +/-    0.0019
Time of Perihelion: 2449172.7761 +/-       3.9
Perihelion:          37.15488515 +/-    0.0021
Aphelion:            43.04494989 +/-    0.0024
Period (y)              253.9355 +/-      0.02
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           29.53589652 +/-    0.0004
Ecliptic Y           17.21372781 +/-    0.0002
Ecliptic Z          -15.14787048 +/-    0.0002
Ecliptic XDOT        -0.00152849 +/-    0.0000
Ecliptic YDOT         0.00243649 +/-    0.0000
Ecliptic ZDOT        -0.00041903 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   37.39168698 +/-    0.0003
Geocenter to KBO     36.86793229 +/-    0.0005
# Hcoef:  5.83

The following table shows the complete astrometric record for 17OG69. 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 (17OG69) followed by the observatory code and reference code for the source of the astrometry.

2008 08  28.61693  02 31 13.32   -10 45 44.0   21.3r 17OG69    568  C~4UPf      
2008 08  28.62328  02 31 13.31   -10 45 44.3         17OG69    568  C~4UPf      
2008 09  29.54956  02 29 37.39   -11 09 47.0         17OG69    568  C~4UPf      
2008 09  29.56459  02 29 37.32   -11 09 47.7         17OG69    568  C~4UPf      
2008 09  29.57961  02 29 37.25   -11 09 48.2         17OG69    568  C~4UPf      
2008 10  03.40976  02 29 20.72   -11 12 28.4         17OG69    568  C~4UPf      
2008 10  03.42476  02 29 20.66   -11 12 28.9         17OG69    568  C~4UPf      
2008 10  03.44728  02 29 20.55   -11 12 29.9         17OG69    568  C~4UPf      
2016 01  02.122211 03 08 12.12   -08 52 18.8         17OG69    W84  C~3k5O      
2016 01  02.124954 03 08 12.12   -08 52 18.8         17OG69    W84  C~3k5O      
2017 07  26.56934  03 28 11.005  -07 00 06.62  21.3r 17OG69    568  C~2yfs      
2017 07  27.61906  03 28 14.225  -07 00 34.93  21.3r 17OG69    568  C~2yfs      
2017 09  21.28538  03 28 28.292  -07 35 53.60        17OG69    G37  C~2yfs      
2017 09  22.29523  03 28 25.750  -07 36 36.90  21.2R 17OG69    G37  C~2yfs      
2017 11  23.13570  03 23 49.546  -08 08 23.54  21.3r 17OG69    304  C~2yfs      
2017 11  23.19409  03 23 49.234  -08 08 24.29        17OG69    304  C~2yfs      
2017 12  13.08547  03 22 10.713  -08 09 24.80        17OG69    304  C~2yfs      
2017 12  14.07164  03 22 06.264  -08 09 19.02        17OG69    304  C~2yfs      
2018 11  09.20880  03 31 26.764  -07 39 42.03        17OG69    G37  C~2yfs      
2018 11  09.26968  03 31 26.454  -07 39 43.41        17OG69    G37  C~2yfs      
2018 12  03.02686  03 29 21.858  -07 45 03.50  21.2r 17OG69    304  C~2yfs      
2018 12  03.06434  03 29 21.670  -07 45 03.70  21.3r 17OG69    304  C~2yfs      
2020 09  14.57410  03 47 29.401  -06 16 44.12  22.2w 17OG69    F51  C~48Nk      
2020 09  14.58543  03 47 29.388  -06 16 44.73  22.0w 17OG69    F51  C~48Nk      
2020 09  14.59677  03 47 29.373  -06 16 45.13  21.9w 17OG69    F51  C~48Nk      
2020 09  14.60810  03 47 29.357  -06 16 45.76  21.8w 17OG69    F51  C~48Nk      
2020 10  08.60168  03 46 27.585  -06 32 58.99  21.4i 17OG69    F51  C~4AVA      
2020 10  08.61058  03 46 27.553  -06 32 59.54  21.7i 17OG69    F51  C~4AVA      
2020 10  08.61955  03 46 27.509  -06 32 59.62  21.6i 17OG69    F51  C~4AVA      
2020 10  08.62846  03 46 27.467  -06 32 59.94  21.8i 17OG69    F51  C~4AVA      
2020 12  10.34534  03 41 21.956  -06 55 17.27  21.7w 17OG69    F51  C~4OF8      
2020 12  10.35731  03 41 21.902  -06 55 17.44  21.6w 17OG69    F51  C~4OF8      
2020 12  10.36930  03 41 21.838  -06 55 17.48  22.0w 17OG69    F51  C~4OF8      
2021 01  07.33124  03 39 27.907  -06 49 13.63  21.8w 17OG69    F51  C~4UPf      
2021 01  07.35350  03 39 27.832  -06 49 13.16  22.0w 17OG69    F51  C~4UPf      
2021 01  07.36461  03 39 27.799  -06 49 13.03  22.2w 17OG69    F51  C~4UPf      
2021 01  11.154320 03 39 16.883  -06 47 36.93  22.4G 17OG69    G37  C~4UPf      
2021 01  11.213810 03 39 16.717  -06 47 35.18        17OG69    G37  C~4UPf      
2021 01  11.254110 03 39 16.602  -06 47 34.44        17OG69    G37  C~4UPf      

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    -0.03
     2   0.0000      0.00    -0.08       0.00    -0.04
     3   0.0874      0.00     0.31       0.00     0.21
     4   0.0875      0.00     0.23       0.00     0.14
     5   0.0875      0.00     0.15       0.00     0.28
     6   0.0980      0.00    -0.19       0.00    -0.26
     7   0.0980      0.00    -0.08       0.00    -0.15
     8   0.0981      0.00    -0.21       0.00    -0.22
     9   7.3443      0.00    -0.04       0.00     0.03
    10   7.3443      0.00     0.08       0.00    -0.03
    11   8.9088      0.00    -0.44       0.00     0.10
    12   8.9117      0.00    -0.44       0.00     0.06
    13   9.0641      0.00    -0.11       0.00    -0.06
    14   9.0669      0.00     0.29       0.00    -0.23
    15   9.2362      0.00     0.23       0.00    -0.01
    16   9.2364      0.00     0.22       0.00    -0.10
    17   9.2908      0.00     0.12       0.00    -0.12
    18   9.2935      0.00     0.11       0.00    -0.10
    19  10.1974      0.00     0.08       0.00    -0.05
    20  10.1975      0.00     0.28       0.00    -0.05
    21  10.2626      0.00    -0.17       0.00     0.59
    22  10.2627      0.00    -0.11       0.00     0.54
    23  12.0464      0.00     0.02       0.00     0.15
    24  12.0465      0.00     0.09       0.00     0.01
    25  12.0465      0.00     0.13       0.00     0.08
    26  12.0465      0.00     0.16       0.00    -0.08
    27  12.1122      0.00     0.13       0.00     0.04
    28  12.1122      0.00     0.14       0.00    -0.17
    29  12.1123      0.00    -0.02       0.00     0.09
    30  12.1123      0.00    -0.16       0.00     0.11
    31  12.2840      0.00    -0.08       0.00     0.14
    32  12.2840      0.00     0.01       0.00    -0.05
    33  12.2841      0.00    -0.06       0.00    -0.10
    34  12.3606      0.00    -0.02       0.00     0.00
    35  12.3607      0.00    -0.10       0.00    -0.06
    36  12.3607      0.00    -0.07       0.00    -0.20
    37  12.3711      0.00    -0.03       0.00    -0.16
    38  12.3712      0.00    -0.03       0.00    -0.00
    39  12.3714      0.00    -0.07       0.00    -0.34

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.

17OG69    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        40.450    40.450    40.450
ecceobj         0.080     0.080     0.080
incobj         25.226    25.226    25.226
qmin           36.446    36.508    36.451
qmax           43.943    44.012    43.994
amean          40.110    40.121    40.116
amin           39.780    39.794    39.791
amax           40.460    40.476    40.460
emean           0.073     0.073     0.073
emin            0.060     0.060     0.060
emax            0.087     0.087     0.088
imean          24.029    24.035    24.029
imin           23.551    23.568    23.565
imax           24.597    24.591    24.594
excite_mean     0.414     0.414     0.414
fracstop        1.000     1.000     1.000
cjmean          2.855     2.855     2.855

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       180.7     180.7     181.0
kozaiamp        180.0     179.9     180.0