Orbit Fit and Astrometric record for 17FF226

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: 17FF226   
# Created Wed Dec 25 02:10:56 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     61 observations of     61
# Arc:  20.03y
# First observation: 1998/01/05
#  Last observation: 2018/01/17
# Chi-squared of fit:    51.60 DOF:    116 RMS:  0.16
# Min/Max residuals:    -0.84    0.43
# Exact a, adot, b, bdot, g, gdot:
  1.485872E-05  2.065093E-02  2.656532E-07  2.522575E-03  2.141476E-02 -6.065592E-03
# Covariance matrix:
  1.4851E-13 -2.9153E-14  6.2423E-15 -2.9834E-15 -9.2185E-15 -4.6315E-14
 -2.9153E-14  1.4712E-14 -3.7681E-15  1.7238E-15  2.1869E-14  2.7034E-14
  6.2423E-15 -3.7681E-15  1.0158E-13 -5.9215E-15 -5.6705E-15 -7.1027E-15
 -2.9834E-15  1.7238E-15 -5.9215E-15  5.7014E-16  2.2052E-15  3.2738E-15
 -9.2185E-15  2.1869E-14 -5.6705E-15  2.2052E-15  1.1511E-13  3.6027E-14
 -4.6315E-14  2.7034E-14 -7.1027E-15  3.2738E-15  3.6027E-14  5.1252E-14
#      lat0       lon0       xBary       yBary       zBary        JD0
  -14.773606  127.357630    0.374367   -0.233574   -0.884821  2450818.738081
# Heliocentric elements and errors
Epoch:              2450818.5000  =  1998/01/05
Mean Anomaly:          325.11384 +/-     0.005
Argument of Peri:        4.59193 +/-     0.006
Long of Asc Node:      190.80035 +/-     0.000
Inclination:            16.05774 +/-     0.000
Eccentricity:         0.35926707 +/-    0.0000
Semi-Major Axis:     61.53425775 +/-    0.0053
Time of Perihelion: 2467903.8767 +/-      20.7
Perihelion:          39.42702541 +/-    0.0040
Aphelion:            83.64149008 +/-    0.0075
Period (y)              482.7071 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -27.64862793 +/-    0.0004
Ecliptic Y           36.84115046 +/-    0.0006
Ecliptic Z          -11.90765784 +/-    0.0002
Ecliptic XDOT        -0.00169047 +/-    0.0000
Ecliptic YDOT        -0.00212445 +/-    0.0000
Ecliptic ZDOT         0.00050948 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   47.57656495 +/-    0.0005
Geocenter to KBO     46.69700390 +/-    0.0007
# Hcoef:  6.54

The following table shows the complete astrometric record for 17FF226. 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 (17FF226) followed by the observatory code and reference code for the source of the astrometry.

1998 01  05.237350 08 24 07.82   +04 06 55.9         17FF226   950  C~7gvB      
1998 01  05.248067 08 24 07.77   +04 06 55.8         17FF226   950  C~7gvB      
1998 01  05.259676 08 24 07.72   +04 06 55.7         17FF226   950  C~7gvB      
1998 01  07.246175 08 23 59.79   +04 07 13.3         17FF226   950  C~7gvB      
1998 01  07.258762 08 23 59.73   +04 07 13.5         17FF226   950  C~7gvB      
1998 01  07.276823 08 23 59.67   +04 07 13.8         17FF226   950  C~7gvB      
1998 01  07.288889 08 23 59.59   +04 07 14.2         17FF226   950  C~7gvB      
2001 01  25.304209 08 37 12.46   +03 44 13.3         17FF226   645  C~7gvB      
2001 01  25.305038 08 37 12.42   +03 44 13.3         17FF226   645  C~7gvB      
2001 01  25.307526 08 37 12.47   +03 44 13.2         17FF226   645  C~7gvB      
2001 02  20.312872 08 35 24.99   +03 53 16.7         17FF226   645  C~7gvB      
2001 02  20.315360 08 35 25.00   +03 53 16.5         17FF226   645  C~7gvB      
2002 02  13.248067 08 40 50.88   +03 41 00.4   22.8r 17FF226   645  C~7gvB      
2002 02  13.248897 08 40 50.88   +03 41 00.4   22.5i 17FF226   645  C~7gvB      
2002 02  13.251384 08 40 50.86   +03 41 00.5   23.4g 17FF226   645  C~7gvB      
2002 03  05.128116 08 39 36.69   +03 49 08.1         17FF226   645  C~7gvB      
2002 03  05.128945 08 39 36.68   +03 49 08.0         17FF226   645  C~7gvB      
2006 11  18.443426 09 10 50.83   +02 42 04.2         17FF226   645  C~7gvB      
2006 11  18.445914 09 10 50.81   +02 42 04.5         17FF226   645  C~7gvB      
2015 02  22.124965 09 50 02.340  +01 21 32.26  23.6g 17FF226   W84  C~8HKw      
2015 02  24.170963 09 49 53.450  +01 22 29.75  23.8g 17FF226   W84  C~8HKw      
2015 03  08.229224 09 49 02.85   +01 28 23.0         17FF226   W84  C~7gvB      
2015 03  08.283637 09 49 02.65   +01 28 24.8   22.1i 17FF226   W84  C~7gvB      
2015 03  14.033467 09 48 40.200  +01 31 19.09  22.5i 17FF226   W84  C~8HKw      
2015 03  14.116261 09 48 39.886  +01 31 21.65  22.9r 17FF226   W84  C~8HKw      
2015 03  14.168634 09 48 39.682  +01 31 23.30  23.7g 17FF226   W84  C~8HKw      
2016 01  14.308169 09 58 32.690  +00 55 17.65  23.7g 17FF226   W84  C~8HKw      
2017 02  02.38198  10 03 07.01   +00 48 11.3   23.0r 17FF226   T09  C~7dLC      
2017 02  02.56579  10 03 06.22   +00 48 15.3   22.6i 17FF226   T09  C~7dLC      
2017 02  02.58520  10 03 06.12   +00 48 15.7   22.6i 17FF226   T09  C~7dLC      
2017 02  23.33599  10 01 35.43   +00 57 04.9   23.5g 17FF226   T09  C~7dLC      
2017 02  23.46966  10 01 34.84   +00 57 09.0   23.0r 17FF226   T09  C~7dLC      
2017 02  23.48331  10 01 34.78   +00 57 09.3   22.9r 17FF226   T09  C~7dLC      
2017 02  23.49694  10 01 34.72   +00 57 09.5   22.8r 17FF226   T09  C~7dLC      
2017 03  01.139248 10 01 10.178  +00 59 54.67  22.1g 17FF226   W84  C~8HKw      
2017 03  03.121626 10 01 01.711  +01 00 54.18  22.8r 17FF226   W84  C~8HKw      
2017 03  04.27055  10 00 56.84   +01 01 28.4   22.3z 17FF226   T09  C~7dLC      
2017 03  04.29603  10 00 56.73   +01 01 29.3   22.4z 17FF226   T09  C~7dLC      
2017 03  04.45958  10 00 56.02   +01 01 34.2   22.5i 17FF226   T09  C~7dLC      
2017 03  07.42363  10 00 43.64   +01 03 04.6   22.3y 17FF226   T09  C~7dLC      
2017 03  07.46825  10 00 43.45   +01 03 05.9   22.3y 17FF226   T09  C~7dLC      
2017 03  07.50999  10 00 43.27   +01 03 07.1   22.3y 17FF226   T09  C~7dLC      
2017 03  07.51809  10 00 43.23   +01 03 07.3   22.2y 17FF226   T09  C~7dLC      
2017 03  22.41670  09 59 45.90   +01 10 49.4   22.4z 17FF226   T09  C~7dLC      
2017 03  22.44235  09 59 45.81   +01 10 50.0   22.6z 17FF226   T09  C~7dLC      
2017 03  22.46802  09 59 45.72   +01 10 50.9   22.7z 17FF226   T09  C~7dLC      
2017 03  22.48979  09 59 45.64   +01 10 51.5   22.4z 17FF226   T09  C~7dLC      
2017 03  23.089577 09 59 43.517  +01 11 10.68  22.4V 17FF226   W84  C~8HKw      
2017 03  24.180277 09 59 39.782  +01 11 44.02  23.0V 17FF226   W84  C~8HKw      
2017 03  25.24634  09 59 36.19   +01 12 16.6   23.2r 17FF226   T09  C~7dLC      
2017 03  25.26003  09 59 36.16   +01 12 17.1   23.1r 17FF226   T09  C~7dLC      
2017 03  25.27375  09 59 36.10   +01 12 17.6   23.1r 17FF226   T09  C~7dLC      
2017 03  25.28747  09 59 36.06   +01 12 17.9   23.1r 17FF226   T09  C~7dLC      
2017 03  27.086967 09 59 30.110  +01 13 13.37  23.5g 17FF226   W84  C~8HKw      
2018 01  17.46122  10 10 05.13   +00 30 26.7   22.8i 17FF226   T09  C~7gvB      
2018 01  17.46727  10 10 05.10   +00 30 26.6   22.8i 17FF226   T09  C~7gvB      
2018 01  17.48599  10 10 05.04   +00 30 26.9   22.7i 17FF226   T09  C~7gvB      
2018 01  17.51296  10 10 04.95   +00 30 27.2   22.8i 17FF226   T09  C~7gvB      
2018 01  17.54803  10 10 04.82   +00 30 27.7   22.7i 17FF226   T09  C~7gvB      
2018 01  17.57490  10 10 04.72   +00 30 28.2   22.6i 17FF226   T09  C~7gvB      
2018 01  17.59901  10 10 04.63   +00 30 28.4   22.7i 17FF226   T09  C~7gvB      

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     0.30
     2   0.0000      0.00     0.05       0.00     0.11
     3   0.0001      0.00     0.00       0.00    -0.09
     4   0.0055      0.00     0.20       0.00    -0.17
     5   0.0055      0.00     0.06       0.00    -0.09
     6   0.0056      0.00     0.26       0.00     0.04
     7   0.0056      0.00    -0.20       0.00     0.33
     8   3.0556      0.00    -0.30       0.00    -0.12
     9   3.0556      0.00    -0.84       0.00    -0.13
    10   3.0556      0.00     0.07       0.00    -0.28
    11   3.1268      0.00    -0.31       0.00    -0.08
    12   3.1268      0.00    -0.02       0.00    -0.34
    13   4.1068      0.00     0.15       0.00     0.08
    14   4.1068      0.00     0.20       0.00     0.06
    15   4.1068      0.00     0.06       0.00     0.10
    16   4.1612      0.00     0.17       0.00     0.01
    17   4.1612      0.00     0.06       0.00    -0.11
    18   8.8685      0.00     0.29       0.00     0.07
    19   8.8685      0.00     0.00       0.00     0.41
    20  17.1304      0.00    -0.10       0.00     0.04
    21  17.1360      0.00     0.06       0.00     0.08
    22  17.1690      0.00    -0.28       0.00    -0.22
    23  17.1692      0.00     0.05       0.00    -0.06
    24  17.1849      0.00    -0.05       0.00    -0.02
    25  17.1852      0.00     0.03       0.00     0.02
    26  17.1853      0.00    -0.00       0.00     0.08
    27  18.0235      0.00     0.04       0.00     0.02
    28  19.0777      0.00     0.07       0.00     0.01
    29  19.0782      0.00     0.09       0.00     0.02
    30  19.0783      0.00    -0.15       0.00    -0.00
    31  19.1351      0.00    -0.10       0.00    -0.17
    32  19.1355      0.00     0.01       0.00     0.11
    33  19.1355      0.00     0.02       0.00     0.02
    34  19.1356      0.00     0.04       0.00    -0.17
    35  19.1510      0.00    -0.09       0.00    -0.12
    36  19.1564      0.00     0.13       0.00     0.06
    37  19.1596      0.00     0.08       0.00    -0.21
    38  19.1596      0.00     0.06       0.00    -0.08
    39  19.1601      0.00    -0.03       0.00    -0.13
    40  19.1682      0.00     0.13       0.00     0.01
    41  19.1683      0.00     0.10       0.00    -0.06
    42  19.1684      0.00     0.03       0.00    -0.13
    43  19.1685      0.00    -0.06       0.00    -0.18
    44  19.2093      0.00     0.03       0.00     0.16
    45  19.2093      0.00     0.05       0.00    -0.03
    46  19.2094      0.00     0.08       0.00     0.07
    47  19.2095      0.00     0.04       0.00    -0.00
    48  19.2111      0.00    -0.57       0.00     0.43
    49  19.2141      0.00    -0.12       0.00     0.06
    50  19.2170      0.00    -0.04       0.00    -0.05
    51  19.2170      0.00     0.21       0.00     0.02
    52  19.2171      0.00     0.02       0.00     0.10
    53  19.2171      0.00     0.12       0.00    -0.02
    54  19.2220      0.00     0.07       0.00     0.02
    55  20.0335      0.00    -0.02       0.00     0.20
    56  20.0335      0.00    -0.15       0.00     0.01
    57  20.0335      0.00    -0.03       0.00     0.05
    58  20.0336      0.00     0.07       0.00    -0.02
    59  20.0337      0.00     0.02       0.00    -0.01
    60  20.0338      0.00    -0.02       0.00     0.12
    61  20.0338      0.00    -0.07       0.00    -0.02

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.

17FF226    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        61.947    61.946    61.947
ecceobj         0.361     0.361     0.361
incobj         16.061    16.061    16.061
qmin           38.356    38.345    38.355
qmax           87.182    87.056    87.117
amean          62.101    62.098    62.107
amin           61.402    61.395    61.365
amax           63.073    63.069    63.076
emean           0.367     0.367     0.367
emin            0.353     0.353     0.352
emax            0.382     0.382     0.381
imean          15.628    15.625    15.637
imin           15.147    15.130    15.126
imax           16.230    16.222    16.242
excite_mean     0.455     0.455     0.455
fracstop        1.000     1.000     1.000
cjmean          3.058     3.058     3.058

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       165.2     166.2     166.9
kozaiamp        180.0     179.9     179.9