Orbit Fit and Astrometric record for 15FJ490

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: 15FJ490   
# Created Tue Apr  1 01:10:22 2025
# Orbit generated from Bernstein formalism
# Fitting     14 observations of     14
# Arc:  10.85d
# First observation: 2015/03/18
#  Last observation: 2015/03/29
Preliminary a, adot, b, bdot, g, gdot:
  -0.000000   0.050098   0.000000  -0.006397   0.032933   0.000000
# WARNING MRQMIN stopped after  13 iterations -- oscilliatory solution
# WARNING Fitting with energy constraint
# WARNING MRQMIN stopped after  14 iterations -- oscilliatory solution
# Chi-squared of fit:     5.46 DOF:     23 RMS:  0.11
# Min/Max residuals:    -0.27    0.19
# Exact a, adot, b, bdot, g, gdot:
  1.582024E-05  2.972232E-02 -3.269593E-06 -6.405252E-03  2.970756E-02  1.220685E-02
# Covariance matrix:
  2.4865E-10  4.7178E-07 -1.0676E-12  2.2280E-10  7.4556E-08 -7.0336E-07
  4.7178E-07  8.9642E-04 -2.0335E-09  4.2489E-07  1.4165E-04 -1.3447E-03
 -1.0676E-12 -2.0335E-09  2.6731E-13 -1.2994E-11 -3.2123E-10  3.1984E-09
  2.2280E-10  4.2489E-07 -1.2994E-11  1.1240E-09  6.7107E-08 -6.8357E-07
  7.4556E-08  1.4165E-04 -3.2123E-10  6.7107E-08  2.2384E-05 -2.1231E-04
 -7.0336E-07 -1.3447E-03  3.1984E-09 -6.8357E-07 -2.1231E-04  2.2606E-03
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.191219  178.897079    0.025086    0.003430   -0.991845  2457100.073858
# Heliocentric elements and errors
Epoch:              2457100.5000  =  2015/03/19
Mean Anomaly:           57.69430 +/-    51.587
Argument of Peri:       77.49779 +/-   161.994
Long of Asc Node:      359.71936 +/-     0.859
Inclination:            12.13037 +/-    11.837
Eccentricity:         0.37824938 +/-    1.4999
Semi-Major Axis:     37.36175656 +/-   15.2922
Time of Perihelion: 2443732.3969 +/-    8689.9
Perihelion:          23.22969547 +/-   56.8415
Aphelion:            51.49381765 +/-   59.8730
Period (y)              228.3753 +/-    140.21
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -34.64936689 +/-    5.3598
Ecliptic Y            0.69200104 +/-    0.1036
Ecliptic Z            0.11225639 +/-    0.0179
Ecliptic XDOT        -0.00118288 +/-    0.0045
Ecliptic YDOT        -0.00272278 +/-    0.0024
Ecliptic ZDOT        -0.00058646 +/-    0.0001
# Distances at JD0 (AU)
Heliocenter to KBO   34.65645817 +/-    5.3587
Geocenter to KBO     33.66147088 +/-    5.3609
# Hcoef:  9.53

The following table shows the complete astrometric record for 15FJ490. 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 (15FJ490) followed by the observatory code and reference code for the source of the astrometry.

2015 03  18.57308  11 56 15.39   +00 36 50.9   24.8r 15FJ490   T09  C~8eRh      
2015 03  18.57522  11 56 15.38   +00 36 50.9   25.3r 15FJ490   T09  C~8eRh      
2015 03  20.43719  11 56 05.07   +00 37 50.7   24.3i 15FJ490   T09  C~8eRh      
2015 03  20.46619  11 56 04.89   +00 37 51.9   24.7i 15FJ490   T09  C~8eRh      
2015 03  20.50521  11 56 04.69   +00 37 53.1   24.4i 15FJ490   T09  C~8eRh      
2015 03  20.54104  11 56 04.49   +00 37 54.1   24.6i 15FJ490   T09  C~8eRh      
2015 03  20.55195  11 56 04.42   +00 37 54.4   24.5i 15FJ490   T09  C~8eRh      
2015 03  25.46627  11 55 37.25   +00 40 31.6   25.4g 15FJ490   T09  C~8eRh      
2015 03  25.48926  11 55 37.11   +00 40 32.6   25.6g 15FJ490   T09  C~8eRh      
2015 03  25.52385  11 55 36.91   +00 40 33.7   25.1g 15FJ490   T09  C~8eRh      
2015 03  25.55185  11 55 36.76   +00 40 34.3   25.5g 15FJ490   T09  C~8eRh      
2015 03  29.41014  11 55 15.63   +00 42 36.6   23.9y 15FJ490   T09  C~8eRh      
2015 03  29.41824  11 55 15.59   +00 42 36.9   24.3y 15FJ490   T09  C~8eRh      
2015 03  29.42099  11 55 15.55   +00 42 36.9   24.8y 15FJ490   T09  C~8eRh      

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     0.00       0.00    -0.03
     2   0.0000     -0.14     0.05      -0.06    -0.08
     3   0.0051   -165.81     0.06      -6.70    -0.06
     4   0.0052   -168.76    -0.27      -6.67     0.09
     5   0.0053   -171.99     0.03      -6.76     0.16
     6   0.0054   -175.14     0.11      -7.04     0.04
     7   0.0054   -176.22     0.01      -7.18    -0.06
     8   0.0189   -612.65     0.19     -25.02    -0.08
     9   0.0189   -614.98    -0.07     -24.94     0.10
    10   0.0190   -618.17    -0.16     -25.12     0.06
    11   0.0191   -620.47     0.05     -25.47    -0.17
    12   0.0297   -959.90     0.07     -39.29     0.04
    13   0.0297   -960.57     0.12     -39.26     0.11
    14   0.0297   -961.12    -0.18     -39.50    -0.12

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.

15FJ490    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