Orbit Fit and Astrometric record for 15FG399

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: 15FG399   
# Created Tue Apr  1 01:10:21 2025
# Orbit generated from Bernstein formalism
# Fitting     22 observations of     22
# Arc:  65.88d
# First observation: 2015/03/18
#  Last observation: 2015/05/23
Preliminary a, adot, b, bdot, g, gdot:
   0.000000   0.039757   0.000001   0.004178   0.030202   0.000000
# WARNING Fitting with energy constraint
# Chi-squared of fit:     7.47 DOF:     39 RMS:  0.10
# Min/Max residuals:    -0.30    0.28
# Exact a, adot, b, bdot, g, gdot:
  1.688534E-05  3.033601E-02  2.176515E-06  4.271618E-03  2.870586E-02 -3.774728E-03
# Covariance matrix:
  7.5742E-13  1.2096E-09  1.3214E-13 -1.3218E-11  1.8585E-10 -1.2161E-08
  1.2096E-09  2.6207E-06  2.9223E-10 -2.9254E-08  3.9910E-07 -2.7107E-05
  1.3214E-13  2.9223E-10  1.3231E-13 -3.9323E-12  4.4459E-11 -3.0328E-09
 -1.3218E-11 -2.9254E-08 -3.9323E-12  3.4092E-10 -4.4506E-09  3.0365E-07
  1.8585E-10  3.9910E-07  4.4459E-11 -4.4506E-09  6.0804E-08 -4.1226E-06
 -1.2161E-08 -2.7107E-05 -3.0328E-09  3.0365E-07 -4.1226E-06  2.8167E-04
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.314935  179.907822    0.044253   -0.005320   -0.991152  2457099.977925
# Heliocentric elements and errors
Epoch:              2457090.5000  =  2015/03/09
Mean Anomaly:          300.51784 +/-    20.950
Argument of Peri:       71.43158 +/-    36.061
Long of Asc Node:      182.01297 +/-     0.121
Inclination:             8.00916 +/-     0.444
Eccentricity:         0.13303149 +/-    0.5702
Semi-Major Axis:     37.84364547 +/-    8.4589
Time of Perihelion: 2471140.3627 +/-    1515.6
Perihelion:          32.80924910 +/-   22.7910
Aphelion:            42.87804184 +/-   23.6115
Period (y)              232.8079 +/-     78.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -35.82974323 +/-    0.2992
Ecliptic Y            0.10173736 +/-    0.0005
Ecliptic Z           -0.19138860 +/-    0.0017
Ecliptic XDOT         0.00034970 +/-    0.0016
Ecliptic YDOT        -0.00289967 +/-    0.0001
Ecliptic ZDOT         0.00040947 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   35.83039882 +/-    0.2992
Geocenter to KBO     34.83609492 +/-    0.2992
# Hcoef:  8.93

The following table shows the complete astrometric record for 15FG399. 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 (15FG399) followed by the observatory code and reference code for the source of the astrometry.

2015 03  18.477147 11 59 09.637  -00 15 08.21  24.0r 15FG399   568  C~2TuI      
2015 03  18.499087 11 59 09.526  -00 15 07.48  24.1r 15FG399   568  C~2TuI      
2015 03  18.509963 11 59 09.465  -00 15 07.07  24.0r 15FG399   568  C~2TuI      
2015 03  18.538296 11 59 09.319  -00 15 06.05  24.1r 15FG399   568  C~2TuI      
2015 03  18.566581 11 59 09.173  -00 15 05.04  24.2r 15FG399   568  C~2TuI      
2015 03  20.423112 11 58 59.641  -00 13 58.11  23.9i 15FG399   568  C~2TuI      
2015 03  20.463417 11 58 59.429  -00 13 56.63  23.9i 15FG399   568  C~2TuI      
2015 03  20.488617 11 58 59.298  -00 13 55.78  23.9i 15FG399   568  C~2TuI      
2015 03  20.502393 11 58 59.222  -00 13 55.28  24.0i 15FG399   568  C~2TuI      
2015 03  25.45464  11 58 33.78   -00 10 56.8   25.2g 15FG399   T09  C~8eRZ      
2015 03  25.47635  11 58 33.67   -00 10 56.0   24.5g 15FG399   T09  C~8eRZ      
2015 03  25.51534  11 58 33.46   -00 10 54.6   24.8g 15FG399   T09  C~8eRZ      
2015 03  25.54330  11 58 33.31   -00 10 53.6   24.9g 15FG399   T09  C~8eRZ      
2015 03  25.55185  11 58 33.28   -00 10 53.1   25.2g 15FG399   T09  C~8eRZ      
2015 03  29.29907  11 58 14.21   -00 08 39.1   24.6y 15FG399   T09  C~8iaa      
2015 03  29.31803  11 58 14.08   -00 08 38.2   24.9y 15FG399   T09  C~8iaa      
2015 03  29.33718  11 58 14.00   -00 08 37.9   24.1y 15FG399   T09  C~8iaa      
2015 05  23.27714  11 54 48.01   +00 16 21.7   24.1z 15FG399   T09  C~8iaa      
2015 05  23.29468  11 54 47.98   +00 16 22.0   24.4z 15FG399   T09  C~8iaa      
2015 05  23.31221  11 54 47.96   +00 16 22.2   24.4z 15FG399   T09  C~8iaa      
2015 05  23.33848  11 54 47.90   +00 16 22.2   24.6z 15FG399   T09  C~8iaa      
2015 05  23.35297  11 54 47.88   +00 16 22.8   24.4z 15FG399   T09  C~8iaa      

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    -0.04       0.00     0.04
     2   0.0001     -1.82     0.04       0.01     0.00
     3   0.0001     -2.82    -0.02       0.02    -0.00
     4   0.0002     -5.24     0.00       0.08     0.01
     5   0.0002     -7.65     0.03       0.14     0.01
     6   0.0053   -165.45     0.03       4.67     0.05
     7   0.0054   -168.96     0.01       4.77     0.07
     8   0.0055   -171.10     0.05       4.76     0.02
     9   0.0055   -172.34    -0.00       4.77    -0.00
    10   0.0191   -593.48    -0.03      16.71    -0.04
    11   0.0192   -595.31     0.01      16.79    -0.00
    12   0.0193   -598.75    -0.09      16.82    -0.04
    13   0.0193   -601.22    -0.15      16.85    -0.08
    14   0.0194   -601.83    -0.03      17.13     0.19
    15   0.0296   -917.58     0.28      26.28    -0.01
    16   0.0297   -919.73    -0.26      26.33    -0.00
    17   0.0297   -920.95     0.15      26.13    -0.24
    18   0.1802  -4352.97    -0.08     172.88     0.03
    19   0.1802  -4353.50    -0.08     172.98     0.09
    20   0.1802  -4353.86     0.10     173.04     0.12
    21   0.1803  -4354.68     0.07     172.68    -0.30
    22   0.1804  -4355.20    -0.00     173.11     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.

15FG399    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