Orbit Fit and Astrometric record for 15FH561

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: 15FH561   
# Created Thu Jul  3 01:10:29 2025
# Orbit generated from Bernstein formalism
# Fitting     21 observations of     21
# Arc:   1.01y
# First observation: 2014/03/25
#  Last observation: 2015/03/29
Preliminary a, adot, b, bdot, g, gdot:
  -0.000012   0.024172   0.000001  -0.005703   0.024455   0.000000
# Chi-squared of fit:     6.51 DOF:     36 RMS:  0.10
# Min/Max residuals:    -0.18    0.19
# Exact a, adot, b, bdot, g, gdot:
  1.617322E-05  2.429592E-02 -4.527797E-06 -5.735701E-03  2.488915E-02  5.748247E-03
# Covariance matrix:
  3.8564E-13  1.2615E-11 -2.4443E-14 -3.0462E-12  1.0675E-11  5.3862E-10
  1.2615E-11  6.7542E-10 -1.1568E-12 -1.6130E-10  5.2689E-10  2.8474E-08
 -2.4443E-14 -1.1568E-12  1.2581E-13  1.5191E-13 -9.9088E-13 -4.8944E-11
 -3.0462E-12 -1.6130E-10  1.5191E-13  3.8829E-11 -1.2596E-10 -6.8029E-09
  1.0675E-11  5.2689E-10 -9.9088E-13 -1.2596E-10  4.3586E-10  2.2266E-08
  5.3862E-10  2.8474E-08 -4.8944E-11 -6.8029E-09  2.2266E-08  1.2010E-06
#      lat0       lon0       xBary       yBary       zBary        JD0
   13.603344 -147.525147    0.463145    0.207475   -0.857058  2456742.080948
# Heliocentric elements and errors
Epoch:              2456740.5000  =  2014/03/24
Mean Anomaly:           52.25230 +/-     2.010
Argument of Peri:       55.88992 +/-     2.226
Long of Asc Node:       76.59735 +/-     0.042
Inclination:            18.56567 +/-     0.013
Eccentricity:         0.23879311 +/-    0.0449
Semi-Major Axis:     45.71809910 +/-    1.0293
Time of Perihelion: 2440352.2113 +/-     301.7
Perihelion:          34.80093194 +/-    2.1958
Aphelion:            56.63526627 +/-    2.4153
Period (y)              309.1295 +/-     10.44
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -33.93827967 +/-    0.0276
Ecliptic Y          -21.04892672 +/-    0.0176
Ecliptic Z            9.44970579 +/-    0.0079
Ecliptic XDOT         0.00078573 +/-    0.0001
Ecliptic YDOT        -0.00266751 +/-    0.0001
Ecliptic ZDOT        -0.00046439 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.03853168 +/-    0.0246
Geocenter to KBO     40.17814687 +/-    0.0337
# Hcoef:  8.20

The following table shows the complete astrometric record for 15FH561. 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 (15FH561) followed by the observatory code and reference code for the source of the astrometry.

2014 03  25.58017  14 19 39.92   +00 28 12.2   23.6y 15FH561   T09  C~8uZK      
2014 03  25.60695  14 19 39.81   +00 28 12.7   23.9y 15FH561   T09  C~8uZK      
2014 03  25.61630  14 19 39.79   +00 28 12.8   23.9y 15FH561   T09  C~8uZK      
2014 03  25.62268  14 19 39.77   +00 28 13.2   23.8y 15FH561   T09  C~8uZK      
2014 03  28.52036  14 19 28.36   +00 29 33.5   24.2i 15FH561   T09  C~8uZK      
2014 03  28.52816  14 19 28.32   +00 29 33.8   24.1i 15FH561   T09  C~8uZK      
2014 03  28.53884  14 19 28.27   +00 29 34.1   24.4i 15FH561   T09  C~8uZK      
2014 03  28.55374  14 19 28.21   +00 29 34.5   24.3i 15FH561   T09  C~8uZK      
2014 03  28.57245  14 19 28.14   +00 29 34.8   24.1i 15FH561   T09  C~8uZK      
2014 03  28.58431  14 19 28.08   +00 29 35.3   23.9i 15FH561   T09  C~8uZK      
2014 03  28.59624  14 19 28.05   +00 29 35.8   24.0i 15FH561   T09  C~8uZK      
2014 03  28.60856  14 19 27.99   +00 29 36.0   24.0i 15FH561   T09  C~8uZK      
2015 03  18.58895  14 24 52.54   -00 21 28.3   24.6r 15FH561   T09  C~8uZK      
2015 03  18.61730  14 24 52.45   -00 21 27.6   24.6r 15FH561   T09  C~8uZK      
2015 03  18.63105  14 24 52.40   -00 21 27.0   24.9r 15FH561   T09  C~8uZK      
2015 03  18.64474  14 24 52.36   -00 21 26.6   24.6r 15FH561   T09  C~8uZK      
2015 03  29.46071  14 24 12.58   -00 16 33.3   23.9y 15FH561   T09  C~8uZK      
2015 03  29.47724  14 24 12.51   -00 16 33.0   24.0y 15FH561   T09  C~8uZK      
2015 03  29.57215  14 24 12.13   -00 16 30.4   23.8z 15FH561   T09  C~8uZK      
2015 03  29.58759  14 24 12.07   -00 16 29.9   24.1z 15FH561   T09  C~8uZK      
2015 03  29.60118  14 24 12.02   -00 16 29.6   24.3z 15FH561   T09  C~8uZK      

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    -0.15       0.00     0.18
     2   0.0001     -1.72    -0.13      -0.08    -0.07
     3   0.0001     -2.04     0.16      -0.09    -0.14
     4   0.0001     -2.46     0.15       0.19     0.10
     5   0.0080   -190.62     0.13      18.40    -0.02
     6   0.0081   -191.29    -0.01      18.48     0.02
     7   0.0081   -192.09    -0.10      18.51    -0.00
     8   0.0081   -193.08    -0.08      18.58    -0.01
     9   0.0082   -194.17     0.09      18.51    -0.18
    10   0.0082   -195.18    -0.13      18.68    -0.07
    11   0.0083   -195.77     0.08      19.00     0.18
    12   0.0083   -196.69    -0.01      18.89    -0.00
    13   0.9802   5418.90    -0.05   -1234.10    -0.05
    14   0.9803   5417.39     0.07   -1233.89    -0.07
    15   0.9803   5416.48    -0.04   -1233.57     0.13
    16   0.9803   5415.78     0.04   -1233.40     0.19
    17   1.0099   4754.85    -0.07   -1157.30     0.01
    18   1.0100   4753.76    -0.06   -1157.37    -0.14
    19   1.0102   4747.51    -0.00   -1156.83    -0.07
    20   1.0103   4746.49     0.01   -1156.66     0.02
    21   1.0103   4745.69     0.10   -1156.63    -0.01

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.

15FH561    quality flag:1

Type:       SCATNEAR  CENTAURS  SCATEXTD

axisobj        45.349    49.210    43.240
ecceobj         0.234     0.354     0.115
incobj         18.564    18.522    18.607
qmin           33.358    29.038    37.694
qmax           58.563    75.544    49.640
amean          45.609    50.151    43.521
amin           44.984    46.163    43.165
amax           46.319    53.136    43.901
emean           0.243     0.372     0.116
emin            0.216     0.324     0.102
emax            0.266     0.426     0.131
imean          16.796    16.041    17.064
imin           15.734    12.674    16.526
imax           17.677    18.478    17.586
excite_mean     0.377     0.465     0.316
fracstop        1.000     1.000     1.000
cjmean          2.947     2.902     2.976

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       181.5     172.4     178.8
kozaiamp        180.0     180.0     179.9