Orbit Fit and Astrometric record for 17FS247

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: 17FS247   
# Created Tue Apr  1 01:11:07 2025
# Orbit generated from Bernstein formalism
# Fitting     43 observations of     43
# Arc:  88.83d
# First observation: 2017/01/28
#  Last observation: 2017/04/27
Preliminary a, adot, b, bdot, g, gdot:
  -0.000026   0.044586   0.000053   0.012036   0.031378   0.000000
# Chi-squared of fit:    32.87 DOF:     80 RMS:  0.15
# Min/Max residuals:    -0.46    0.38
# Exact a, adot, b, bdot, g, gdot:
  1.827144E-05  3.383219E-02  6.333219E-06  1.285250E-02  2.967298E-02 -4.795696E-03
# Covariance matrix:
  1.6990E-13 -1.6861E-12 -9.5658E-15  2.5539E-13  1.2464E-13  5.4952E-11
 -1.6861E-12  1.5080E-09  7.4118E-12 -1.3832E-10  1.9798E-10 -1.3895E-08
 -9.5658E-15  7.4118E-12  1.5970E-13 -1.3141E-12  9.5126E-13 -7.2670E-11
  2.5539E-13 -1.3832E-10 -1.3141E-12  1.7575E-11 -1.7313E-11  1.4309E-09
  1.2464E-13  1.9798E-10  9.5126E-13 -1.7313E-11  2.7584E-11 -1.5715E-09
  5.4952E-11 -1.3895E-08 -7.2670E-11  1.4309E-09 -1.5715E-09  1.7222E-07
#      lat0       lon0       xBary       yBary       zBary        JD0
   -9.776794  153.744682    0.424323   -0.150991   -0.877276  2457782.031781
# Heliocentric elements and errors
Epoch:              2457780.5000  =  2017/01/27
Mean Anomaly:          345.51403 +/-     0.788
Argument of Peri:        6.38182 +/-     1.920
Long of Asc Node:      176.68531 +/-     0.025
Inclination:            22.70344 +/-     0.020
Eccentricity:         0.35613520 +/-    0.0091
Semi-Major Axis:     51.59666031 +/-    0.4341
Time of Perihelion: 2463227.7329 +/-     288.1
Perihelion:          33.22127362 +/-    0.5468
Aphelion:            69.97204699 +/-    0.7533
Period (y)              370.6300 +/-      4.68
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -30.39914727 +/-    0.0053
Ecliptic Y           15.46140394 +/-    0.0026
Ecliptic Z           -5.72253617 +/-    0.0010
Ecliptic XDOT        -0.00116756 +/-    0.0000
Ecliptic YDOT        -0.00291008 +/-    0.0000
Ecliptic ZDOT         0.00124372 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   34.58194018 +/-    0.0048
Geocenter to KBO     33.70069722 +/-    0.0060
# Hcoef:  9.87

The following table shows the complete astrometric record for 17FS247. 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 (17FS247) followed by the observatory code and reference code for the source of the astrometry.

2017 01  28.53098  10 08 29.24   +01 00 32.9   24.8z 17FS247   T09  C~8AiJ      
2017 01  28.54440  10 08 29.18   +01 00 33.1   24.6z 17FS247   T09  C~8AiJ      
2017 01  28.55779  10 08 29.12   +01 00 33.6   25.1z 17FS247   T09  C~8AiJ      
2017 01  28.57125  10 08 29.05   +01 00 33.8   24.4z 17FS247   T09  C~8AiJ      
2017 01  28.58466  10 08 28.95   +01 00 34.1   24.2z 17FS247   T09  C~8AiJ      
2017 02  02.50623  10 08 04.71   +01 02 54.0   25.3r 17FS247   T09  C~8AiJ      
2017 02  02.52479  10 08 04.60   +01 02 54.5   25.1r 17FS247   T09  C~8AiJ      
2017 02  02.52702  10 08 04.60   +01 02 54.6   25.1r 17FS247   T09  C~8AiJ      
2017 02  02.53379  10 08 04.55   +01 02 55.0   25.1r 17FS247   T09  C~8AiJ      
2017 02  02.59348  10 08 04.26   +01 02 56.7   24.9i 17FS247   T09  C~8AiJ      
2017 03  04.34714  10 05 28.83   +01 20 41.5   25.6z 17FS247   T09  C~8AiJ      
2017 03  04.45958  10 05 28.25   +01 20 45.9   24.8i 17FS247   T09  C~8AiJ      
2017 03  04.48135  10 05 28.13   +01 20 46.9   25.2i 17FS247   T09  C~8AiJ      
2017 03  04.50300  10 05 28.04   +01 20 47.6   25.2i 17FS247   T09  C~8AiJ      
2017 03  22.28630  10 04 04.02   +01 32 51.8   25.9g 17FS247   T09  C~8AiJ      
2017 03  22.30012  10 04 03.97   +01 32 52.5   25.8g 17FS247   T09  C~8AiJ      
2017 03  22.31401  10 04 03.91   +01 32 53.0   25.8g 17FS247   T09  C~8AiJ      
2017 03  22.31838  10 04 03.89   +01 32 53.0   25.9g 17FS247   T09  C~8AiJ      
2017 03  22.33948  10 04 03.80   +01 32 54.0   25.5g 17FS247   T09  C~8AiJ      
2017 03  22.35217  10 04 03.74   +01 32 54.2   25.9g 17FS247   T09  C~8AiJ      
2017 03  22.39453  10 04 03.56   +01 32 56.1   24.3z 17FS247   T09  C~8Q4G      
2017 03  22.42021  10 04 03.46   +01 32 57.0   24.9z 17FS247   T09  C~8AiJ      
2017 03  22.44588  10 04 03.36   +01 32 58.1   24.5z 17FS247   T09  C~8Q4G      
2017 03  22.49332  10 04 03.12   +01 33 00.2   24.8z 17FS247   T09  C~8Q4G      
2017 03  29.28039  10 03 35.90   +01 37 33.6   25.9g 17FS247   T09  C~8AiJ      
2017 03  29.29433  10 03 35.84   +01 37 34.3   25.8g 17FS247   T09  C~8AiJ      
2017 03  29.30827  10 03 35.79   +01 37 34.8   25.9g 17FS247   T09  C~8AiJ      
2017 04  23.24643  10 02 28.35   +01 52 44.7   25.3r 17FS247   T09  C~8AiJ      
2017 04  23.25033  10 02 28.32   +01 52 45.0   25.6r 17FS247   T09  C~8AiJ      
2017 04  23.25417  10 02 28.32   +01 52 44.8   24.9r 17FS247   T09  C~8AiJ      
2017 04  23.26183  10 02 28.30   +01 52 45.0   25.8r 17FS247   T09  C~8AiJ      
2017 04  23.38014  10 02 28.10   +01 52 49.0   25.3z 17FS247   T09  C~8AiJ      
2017 04  26.24796  10 02 24.19   +01 54 18.7   25.4i 17FS247   T09  C~8AiJ      
2017 04  26.28251  10 02 24.14   +01 54 20.1   25.6i 17FS247   T09  C~8AiJ      
2017 04  26.29400  10 02 24.10   +01 54 19.7   25.4i 17FS247   T09  C~8AiJ      
2017 04  26.29783  10 02 24.09   +01 54 20.3   25.4i 17FS247   T09  C~8AiJ      
2017 04  26.33400  10 02 24.05   +01 54 21.3   25.9g 17FS247   T09  C~8AiJ      
2017 04  27.34452  10 02 22.88   +01 54 52.0   25.1i 17FS247   T09  C~8AiJ      
2017 04  27.34835  10 02 22.88   +01 54 52.0   24.9i 17FS247   T09  C~8AiJ      
2017 04  27.35218  10 02 22.88   +01 54 52.2   25.2i 17FS247   T09  C~8AiJ      
2017 04  27.35601  10 02 22.88   +01 54 52.3   25.3i 17FS247   T09  C~8AiJ      
2017 04  27.35984  10 02 22.87   +01 54 52.3   25.1i 17FS247   T09  C~8AiJ      
2017 04  27.36375  10 02 22.87   +01 54 52.7   25.0i 17FS247   T09  C~8AiJ      

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    -0.05       0.00     0.11
     2   0.0000     -0.91     0.09      -0.13    -0.01
     3   0.0001     -1.93     0.13       0.01     0.15
     4   0.0001     -2.98     0.14      -0.18    -0.02
     5   0.0001     -4.49    -0.32      -0.43    -0.26
     6   0.0136   -394.02     0.14       0.56     0.02
     7   0.0137   -395.74    -0.04       0.44    -0.11
     8   0.0137   -395.78     0.10       0.53    -0.02
     9   0.0137   -396.62    -0.18       0.64     0.09
    10   0.0139   -401.29     0.06       0.67     0.10
    11   0.0953  -2958.91    -0.15     164.11     0.10
    12   0.0956  -2968.60    -0.05     165.12     0.03
    13   0.0957  -2970.64    -0.20     165.41     0.11
    14   0.0957  -2972.15     0.17     165.59     0.08
    15   0.1444  -4407.91    -0.18     393.15    -0.03
    16   0.1445  -4408.86    -0.09     393.54     0.15
    17   0.1445  -4409.88    -0.06     393.69     0.09
    18   0.1445  -4410.16    -0.01     393.58    -0.08
    19   0.1446  -4411.78    -0.03     394.03     0.06
    20   0.1446  -4412.69     0.02     393.90    -0.26
    21   0.1447  -4415.89     0.02     394.71    -0.07
    22   0.1448  -4417.61     0.23     395.02    -0.14
    23   0.1449  -4419.40     0.37     395.51    -0.03
    24   0.1450  -4423.52    -0.18     396.19    -0.06
    25   0.1636  -4902.54     0.09     506.24    -0.16
    26   0.1636  -4903.63    -0.05     506.57    -0.06
    27   0.1637  -4904.51     0.03     506.77    -0.09
    28   0.2319  -6174.41     0.36     996.99     0.32
    29   0.2319  -6174.94    -0.03     997.11     0.35
    30   0.2320  -6174.86     0.17     996.93     0.08
    31   0.2320  -6175.22     0.08     997.01     0.00
    32   0.2323  -6179.45    -0.11     999.68     0.16
    33   0.2402  -6266.25     0.15    1062.66     0.08
    34   0.2403  -6267.45    -0.03    1063.70     0.38
    35   0.2403  -6267.87    -0.11    1063.11    -0.46
    36   0.2403  -6268.23    -0.35    1063.62    -0.03
    37   0.2404  -6269.14    -0.21    1064.34    -0.09
    38   0.2432  -6296.50    -0.11    1086.79    -0.08
    39   0.2432  -6296.50    -0.01    1086.79    -0.16
    40   0.2432  -6296.57     0.03    1086.98    -0.06
    41   0.2432  -6296.60     0.10    1087.07    -0.05
    42   0.2432  -6296.74     0.06    1087.02    -0.19
    43   0.2432  -6296.89     0.03    1087.39     0.10

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.

17FS247    quality flag:2

Type:       SCATNEAR  CENTAURS  SCATNEAR

axisobj        51.219    52.078    50.543
ecceobj         0.349     0.369     0.333
incobj         22.771    22.710    22.835
qmin           31.247    29.969    31.148
qmax           72.521    80.342    70.292
amean          51.130    53.601    50.322
amin           50.119    51.127    49.369
amax           52.141    55.763    51.154
emean           0.361     0.408     0.351
emin            0.325     0.362     0.325
emax            0.392     0.442     0.379
imean          21.604    20.884    21.316
imin           20.252    19.057    19.949
imax           23.214    22.418    22.425
excite_mean     0.516     0.542     0.506
fracstop        1.000     1.000     1.000
cjmean          2.849     2.838     2.854

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       176.4     182.0     177.8
kozaiamp        180.0     179.9     180.0