Orbit Fit and Astrometric record for 15FS401

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: 15FS401   
# Created Tue Apr  1 01:10:21 2025
# Orbit generated from Bernstein formalism
# Fitting      7 observations of      7
# Arc:   3.09d
# First observation: 2015/03/22
#  Last observation: 2015/03/25
# WARNING Fitting with energy constraint
# WARNING and with gdot fixed = 0
# Chi-squared of fit:     0.12 DOF:     10 RMS:  0.02
# Min/Max residuals:    -0.05    0.04
# Exact a, adot, b, bdot, g, gdot:
  1.320521E-05  1.834091E-02  6.310656E-06  8.819628E-03  2.189106E-02  0.000000E+00
# Covariance matrix:
  3.6444E-11  4.9648E-08 -1.5643E-14 -1.0147E-10  7.9007E-09  0.0000E+00
  4.9648E-08  6.8576E-05 -2.1516E-11 -1.4001E-07  1.0900E-05  0.0000E+00
 -1.5643E-14 -2.1516E-11  4.1928E-13 -5.1254E-11 -3.4219E-12  0.0000E+00
 -1.0147E-10 -1.4001E-07 -5.1254E-11  1.2853E-08 -2.2257E-08  0.0000E+00
  7.9007E-09  1.0900E-05 -3.4219E-12 -2.2257E-08  1.7327E-06  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  1.3805E-04
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.996174  178.602350   -0.047132   -0.034436   -0.991563  2457103.960682
# Heliocentric elements and errors
Epoch:              2457100.5000  =  2015/03/19
Mean Anomaly:            5.31272 +/-   140.048
Argument of Peri:      349.87983 +/-   206.419
Long of Asc Node:      182.72412 +/-     1.831
Inclination:            25.69972 +/-    10.082
Eccentricity:         0.02632008 +/-    0.5673
Semi-Major Axis:     47.93130561 +/-   25.0954
Time of Perihelion: 2455311.7813 +/-  410770.6
Perihelion:          46.66974982 +/-   36.5585
Aphelion:            49.19286139 +/-   37.4543
Period (y)              331.8464 +/-    260.62
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -46.63562196 +/-    2.7443
Ecliptic Y            1.09042157 +/-    0.0672
Ecliptic Z           -1.59087768 +/-    0.0957
Ecliptic XDOT        -0.00009774 +/-    0.0015
Ecliptic YDOT        -0.00229802 +/-    0.0009
Ecliptic ZDOT         0.00110246 +/-    0.0001
# Distances at JD0 (AU)
Heliocenter to KBO   46.67548765 +/-    2.7420
Geocenter to KBO     45.68074734 +/-    2.7468
# Hcoef:  7.06

The following table shows the complete astrometric record for 15FS401. 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 (15FS401) followed by the observatory code and reference code for the source of the astrometry.

2015 03  22.459904 11 51 41.699  -01 16 32.26  23.4i 15FS401   568  C~2TuK      
2015 03  22.496335 11 51 41.549  -01 16 31.11  23.3i 15FS401   568  C~2TuK      
2015 03  22.518396 11 51 41.460  -01 16 30.44  23.4i 15FS401   568  C~2TuK      
2015 03  25.474187 11 51 29.673  -01 14 57.29  24.2g 15FS401   568  C~2TuK      
2015 03  25.502434 11 51 29.556  -01 14 56.32  24.2g 15FS401   568  C~2TuK      
2015 03  25.504579 11 51 29.551  -01 14 56.29  24.1g 15FS401   568  C~2TuK      
2015 03  25.547524 11 51 29.377  -01 14 54.89  24.0g 15FS401   568  C~2TuK      

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     0.01       0.00     0.01
     2   0.0001     -2.52    -0.01       0.16     0.00
     3   0.0002     -4.01     0.01       0.24    -0.02
     4   0.0083   -203.24     0.03      15.40    -0.05
     5   0.0083   -205.24    -0.04      15.59     0.01
     6   0.0083   -205.32     0.02      15.59    -0.00
     7   0.0085   -208.27    -0.01      15.83     0.04

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.

15FS401    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