Orbit Fit and Astrometric record for 15FB495

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: 15FB495   
# Created Tue Apr  1 01:10:22 2025
# Orbit generated from Bernstein formalism
# Fitting     16 observations of     16
# Arc:  65.88d
# First observation: 2015/03/18
#  Last observation: 2015/05/23
Preliminary a, adot, b, bdot, g, gdot:
   0.000000   0.030927   0.000001   0.003337   0.025815   0.000000
# WARNING Fitting with energy constraint
# Chi-squared of fit:     3.38 DOF:     27 RMS:  0.08
# Min/Max residuals:    -0.11    0.16
# Exact a, adot, b, bdot, g, gdot:
  1.504187E-05  2.318641E-02  2.586955E-06  3.484699E-03  2.459001E-02  3.837241E-03
# Covariance matrix:
  2.4816E-12  3.7006E-09  3.8283E-13 -7.2625E-11  5.7337E-10 -4.0626E-08
  3.7006E-09  6.0170E-06  6.2540E-10 -1.1870E-07  9.2856E-07 -6.6985E-05
  3.8283E-13  6.2540E-10  1.9565E-13 -1.3139E-11  9.6458E-11 -6.9771E-09
 -7.2625E-11 -1.1870E-07 -1.3139E-11  2.3603E-09 -1.8307E-08  1.3246E-06
  5.7337E-10  9.2856E-07  9.6458E-11 -1.8307E-08  1.4336E-07 -1.0320E-05
 -4.0626E-08 -6.6985E-05 -6.9771E-09  1.3246E-06 -1.0320E-05  7.5025E-04
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.259700  179.922724    0.044767   -0.021660   -0.990903  2457099.963238
# Heliocentric elements and errors
Epoch:              2457090.5000  =  2015/03/09
Mean Anomaly:           84.32627 +/-    70.096
Argument of Peri:      248.90651 +/-    36.556
Long of Asc Node:      188.00843 +/-     0.913
Inclination:             8.61163 +/-     0.948
Eccentricity:         0.16176091 +/-    1.1206
Semi-Major Axis:     41.24078281 +/-    9.4873
Time of Perihelion: 2434431.0615 +/-   17136.0
Perihelion:          34.56963619 +/-   46.8943
Aphelion:            47.91192942 +/-   47.5112
Period (y)              264.8491 +/-     91.39
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -41.65126709 +/-    0.6260
Ecliptic Y            0.10076226 +/-    0.0009
Ecliptic Z           -0.89390743 +/-    0.0138
Ecliptic XDOT        -0.00044256 +/-    0.0031
Ecliptic YDOT        -0.00258675 +/-    0.0002
Ecliptic ZDOT         0.00037859 +/-    0.0001
# Distances at JD0 (AU)
Heliocenter to KBO   41.66098023 +/-    0.6259
Geocenter to KBO     40.66692641 +/-    0.6262
# Hcoef:  8.95

The following table shows the complete astrometric record for 15FB495. 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 (15FB495) followed by the observatory code and reference code for the source of the astrometry.

2015 03  18.46246  11 57 42.71   -01 07 30.0   25.1r 15FB495   T09  C~8iai      
2015 03  18.49910  11 57 42.54   -01 07 28.8   25.0r 15FB495   T09  C~8iai      
2015 03  18.52754  11 57 42.42   -01 07 28.0   25.1r 15FB495   T09  C~8iai      
2015 03  18.52967  11 57 42.40   -01 07 27.8   24.8r 15FB495   T09  C~8iai      
2015 03  18.55580  11 57 42.29   -01 07 27.0   25.0r 15FB495   T09  C~8iai      
2015 03  18.56877  11 57 42.23   -01 07 26.5   24.8r 15FB495   T09  C~8iai      
2015 03  20.48863  11 57 33.58   -01 06 26.3   24.9i 15FB495   T09  C~8iai      
2015 03  20.52736  11 57 33.41   -01 06 25.3   24.6i 15FB495   T09  C~8iai      
2015 03  20.53005  11 57 33.39   -01 06 25.2   24.1i 15FB495   T09  C~8iai      
2015 03  25.44011  11 57 11.31   -01 03 50.9   26.3g 15FB495   T09  C~8iai      
2015 03  25.50459  11 57 11.01   -01 03 48.6   26.3g 15FB495   T09  C~8iai      
2015 03  25.54542  11 57 10.82   -01 03 47.4   26.9g 15FB495   T09  C~8iai      
2015 05  23.30928  11 53 52.95   -00 39 14.0   24.4z 15FB495   T09  C~8iai      
2015 05  23.31221  11 53 52.93   -00 39 14.0   24.6z 15FB495   T09  C~8iai      
2015 05  23.32981  11 53 52.90   -00 39 13.7   24.3z 15FB495   T09  C~8iai      
2015 05  23.34721  11 53 52.88   -00 39 13.3   24.7z 15FB495   T09  C~8iai      

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    -0.03       0.00    -0.07
     2   0.0001     -2.82    -0.08       0.09    -0.03
     3   0.0002     -4.79     0.10       0.10    -0.06
     4   0.0002     -5.14    -0.09       0.17     0.00
     5   0.0003     -6.97     0.05       0.25     0.04
     6   0.0003     -8.00    -0.00       0.35     0.13
     7   0.0055   -150.96    -0.07       3.96     0.10
     8   0.0057   -153.70     0.12       3.87    -0.05
     9   0.0057   -154.02     0.01       3.84    -0.08
    10   0.0191   -519.21     0.13      13.65    -0.11
    11   0.0193   -524.25    -0.06      13.97     0.11
    12   0.0194   -527.35    -0.08      13.93     0.01
    13   0.1803  -3836.74     0.16     184.48     0.03
    14   0.1803  -3837.01    -0.04     184.36    -0.10
    15   0.1803  -3837.54    -0.08     184.46    -0.06
    16   0.1804  -3837.98    -0.03     184.70     0.13

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.

15FB495    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