Orbit Fit and Astrometric record for 15FZ489

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: 15FZ489   
# Created Tue Apr  1 01:10:22 2025
# Orbit generated from Bernstein formalism
# Fitting     29 observations of     29
# Arc:  62.84d
# First observation: 2015/01/16
#  Last observation: 2015/03/20
Preliminary a, adot, b, bdot, g, gdot:
   0.000001   0.031335   0.000000   0.014842   0.027428   0.000000
# Chi-squared of fit:    15.05 DOF:     52 RMS:  0.13
# Min/Max residuals:    -0.37    0.30
# Exact a, adot, b, bdot, g, gdot:
  1.878095E-05  3.085978E-02  8.692212E-06  1.481517E-02  2.731553E-02  7.122965E-03
# Covariance matrix:
  2.3627E-13  9.8640E-11  6.3523E-14  4.4840E-12  2.1615E-11  1.3642E-09
  9.8640E-11  2.1945E-07  1.4177E-10  5.7211E-09  4.1168E-08  1.2955E-06
  6.3523E-14  1.4177E-10  1.6498E-13  3.1958E-12  2.6583E-11  8.3355E-10
  4.4840E-12  5.7211E-09  3.1958E-12  1.9031E-10  1.1218E-09  4.6306E-08
  2.1615E-11  4.1168E-08  2.6583E-11  1.1218E-09  7.8004E-09  2.6295E-07
  1.3642E-09  1.2955E-06  8.3355E-10  4.6306E-08  2.6295E-07  1.2787E-05
#      lat0       lon0       xBary       yBary       zBary        JD0
   -9.042598  152.049575    0.581686   -0.124150   -0.781133  2457039.032208
# Heliocentric elements and errors
Epoch:              2457030.5000  =  2015/01/08
Mean Anomaly:            6.78799 +/-     2.946
Argument of Peri:      309.71825 +/-    12.537
Long of Asc Node:      169.14054 +/-     0.273
Inclination:            26.75290 +/-     0.343
Eccentricity:         0.57975774 +/-    0.0981
Semi-Major Axis:     84.53086281 +/-   15.5406
Time of Perihelion: 2451677.9568 +/-    1793.4
Perihelion:          35.52344096 +/-   10.5537
Aphelion:           133.53828466 +/-   25.9124
Period (y)              777.1971 +/-    214.33
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -32.36626343 +/-    0.1033
Ecliptic Y           17.83049464 +/-    0.0548
Ecliptic Z           -5.75353410 +/-    0.0186
Ecliptic XDOT        -0.00228262 +/-    0.0003
Ecliptic YDOT        -0.00229777 +/-    0.0001
Ecliptic ZDOT         0.00135437 +/-    0.0001
# Distances at JD0 (AU)
Heliocenter to KBO   37.39792377 +/-    0.0931
Geocenter to KBO     36.60921113 +/-    0.1184
# Hcoef:  9.92

The following table shows the complete astrometric record for 15FZ489. 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 (15FZ489) followed by the observatory code and reference code for the source of the astrometry.

2015 01  16.53143  10 03 16.20   +02 17 17.2   25.3z 15FZ489   T09  C~8eRg      
2015 01  16.54315  10 03 16.17   +02 17 17.4   25.3z 15FZ489   T09  C~8eRg      
2015 01  16.60661  10 03 15.92   +02 17 18.7   24.7z 15FZ489   T09  C~8eRg      
2015 01  16.62952  10 03 15.82   +02 17 19.2   25.6z 15FZ489   T09  C~8eRg      
2015 01  16.64776  10 03 15.75   +02 17 19.2   24.7z 15FZ489   T09  C~8eRg      
2015 01  17.40063  10 03 12.83   +02 17 35.9   26.0i 15FZ489   T09  C~8eRg      
2015 01  17.41437  10 03 12.77   +02 17 35.7   25.3i 15FZ489   T09  C~8eRg      
2015 01  17.42357  10 03 12.72   +02 17 36.4   25.4i 15FZ489   T09  C~8eRg      
2015 01  19.42426  10 03 04.75   +02 18 20.0   25.7z 15FZ489   T09  C~8eRg      
2015 01  19.43347  10 03 04.71   +02 18 20.3   25.9z 15FZ489   T09  C~8eRg      
2015 01  19.44263  10 03 04.68   +02 18 20.5   25.6z 15FZ489   T09  C~8eRg      
2015 01  20.44268  10 03 00.59   +02 18 43.3   26.6g 15FZ489   T09  C~8eRg      
2015 01  20.45227  10 03 00.54   +02 18 43.8   26.6g 15FZ489   T09  C~8eRg      
2015 01  21.56653  10 02 55.94   +02 19 09.9   25.3i 15FZ489   T09  C~8eRg      
2015 01  21.57962  10 02 55.87   +02 19 10.2   25.1i 15FZ489   T09  C~8eRg      
2015 01  21.58764  10 02 55.85   +02 19 10.4   25.1i 15FZ489   T09  C~8eRg      
2015 01  21.59154  10 02 55.83   +02 19 10.4   25.3i 15FZ489   T09  C~8eRg      
2015 01  21.59540  10 02 55.80   +02 19 10.6   25.7i 15FZ489   T09  C~8eRg      
2015 01  21.60626  10 02 55.76   +02 19 10.9   25.5i 15FZ489   T09  C~8eRg      
2015 01  21.61354  10 02 55.74   +02 19 11.1   25.4i 15FZ489   T09  C~8eRg      
2015 01  21.61742  10 02 55.71   +02 19 11.2   25.3i 15FZ489   T09  C~8eRg      
2015 01  21.62126  10 02 55.69   +02 19 11.4   25.6i 15FZ489   T09  C~8eRg      
2015 03  18.39076  09 58 38.20   +02 50 43.4   25.5r 15FZ489   T09  C~8eRg      
2015 03  18.42974  09 58 38.04   +02 50 44.9   25.9r 15FZ489   T09  C~8eRg      
2015 03  18.44066  09 58 38.00   +02 50 45.3   25.5r 15FZ489   T09  C~8eRg      
2015 03  18.44789  09 58 37.97   +02 50 45.8   26.2r 15FZ489   T09  C~8eRg      
2015 03  20.33757  09 58 30.41   +02 51 58.1   25.2i 15FZ489   T09  C~8eRg      
2015 03  20.35412  09 58 30.35   +02 51 58.6   25.2i 15FZ489   T09  C~8eRg      
2015 03  20.36873  09 58 30.29   +02 51 59.3   25.2i 15FZ489   T09  C~8eRg      

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    -0.19       0.00    -0.02
     2   0.0000     -0.49     0.06       0.03     0.02
     3   0.0002     -4.46     0.10      -0.07     0.00
     4   0.0003     -6.03    -0.03      -0.13    -0.03
     5   0.0003     -7.02     0.13      -0.50    -0.37
     6   0.0024    -53.86    -0.07      -0.26     0.30
     7   0.0024    -54.63     0.04      -0.76    -0.19
     8   0.0024    -55.58    -0.33      -0.37     0.21
     9   0.0079   -182.74     0.12      -1.56    -0.16
    10   0.0079   -183.40     0.06      -1.49    -0.08
    11   0.0080   -183.89     0.18      -1.46    -0.05
    12   0.0107   -249.30     0.06      -1.67    -0.19
    13   0.0107   -250.17    -0.17      -1.46     0.02
    14   0.0138   -323.89     0.14      -1.27     0.07
    15   0.0138   -324.98    -0.06      -1.36    -0.01
    16   0.0138   -325.33     0.14      -1.28     0.07
    17   0.0139   -325.61     0.12      -1.38    -0.04
    18   0.0139   -326.10    -0.11      -1.35    -0.01
    19   0.0139   -326.77    -0.04      -1.28     0.07
    20   0.0139   -327.12     0.11      -1.20     0.15
    21   0.0139   -327.58    -0.08      -1.27     0.08
    22   0.0139   -327.93    -0.17      -1.18     0.17
    23   0.1666  -4605.81    -0.10     415.20    -0.10
    24   0.1667  -4608.58    -0.08     415.77    -0.09
    25   0.1668  -4609.29     0.00     415.93    -0.08
    26   0.1668  -4609.88    -0.08     416.24     0.13
    27   0.1720  -4741.37     0.00     444.23     0.05
    28   0.1720  -4742.39     0.15     444.38    -0.03
    29   0.1720  -4743.48     0.08     444.72     0.09

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.

15FZ489    quality flag:0

Type:      ERR2LARGE ERR2LARGE ERR2LARGE

axisobj         0.000     0.000     0.000
ecceobj        -1.000    -1.000    -1.000
incobj         -1.000    -1.000    -1.000
qmin            0.000     0.000     0.000
qmax            0.000     0.000     0.000
amean           0.000     0.000     0.000
amin            0.000     0.000     0.000
amax            0.000     0.000     0.000
emean           0.000     0.000     0.000
emin            0.000     0.000     0.000
emax            0.000     0.000     0.000
imean           0.000     0.000     0.000
imin            0.000     0.000     0.000
imax            0.000     0.000     0.000
excite_mean     0.000     0.000     0.000
fracstop        0.000     0.000     0.000
cjmean          0.000     0.000     0.000

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         0.0       0.0       0.0
kozaiamp          0.0       0.0       0.0