Orbit Fit and Astrometric record for 23FA55

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: 23FA55    
# Created Wed Dec 25 02:11:20 2024
# Orbit generated from Bernstein formalism
# Fitting      7 observations of      7
# Arc:   0.97y
# First observation: 2023/03/21
#  Last observation: 2024/03/08
Preliminary a, adot, b, bdot, g, gdot:
  -0.000010   0.026692  -0.000002   0.002884   0.025481   0.000000
# Chi-squared of fit:     3.13 DOF:      8 RMS:  0.12
# Min/Max residuals:    -0.23    0.18
# Exact a, adot, b, bdot, g, gdot:
  1.582692E-05  2.649402E-02  1.934121E-06  2.867744E-03  2.569645E-02 -2.817844E-03
# Covariance matrix:
  7.4845E-13  5.8133E-12 -8.9775E-15  6.6974E-13  3.4231E-12  2.3607E-10
  5.8133E-12  1.0903E-09 -3.5026E-12  1.0931E-10  3.4898E-10  3.7709E-08
 -8.9775E-15 -3.5026E-12  3.5468E-13 -7.5547E-13 -1.0798E-12 -1.2066E-10
  6.6974E-13  1.0931E-10 -7.5547E-13  1.2224E-11  3.5204E-11  3.7875E-09
  3.4231E-12  3.4898E-10 -1.0798E-12  3.5204E-11  1.1736E-10  1.2164E-08
  2.3607E-10  3.7709E-08 -1.2066E-10  3.7875E-09  1.2164E-08  1.3069E-06
#      lat0       lon0       xBary       yBary       zBary        JD0
    2.218155  156.460992   -0.403293    0.035405   -0.919805  2460024.799871
# Heliocentric elements and errors
Epoch:              2460020.5000  =  2023/03/17
Mean Anomaly:          319.69853 +/-     8.523
Argument of Peri:       70.70358 +/-    12.938
Long of Asc Node:      137.71325 +/-     0.015
Inclination:             6.52471 +/-     0.005
Eccentricity:         0.13061060 +/-    0.0360
Semi-Major Axis:     43.83270329 +/-    0.4199
Time of Perihelion: 2471886.7706 +/-    2503.7
Perihelion:          38.10768740 +/-    1.6207
Aphelion:            49.55771917 +/-    1.6488
Period (y)              290.2055 +/-      4.17
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -36.64715906 +/-    0.0150
Ecliptic Y           15.52824775 +/-    0.0066
Ecliptic Z            1.50630138 +/-    0.0006
Ecliptic XDOT        -0.00084339 +/-    0.0001
Ecliptic YDOT        -0.00270377 +/-    0.0000
Ecliptic ZDOT         0.00029367 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   39.82975884 +/-    0.0141
Geocenter to KBO     38.91588837 +/-    0.0164
# Hcoef:  7.46

The following table shows the complete astrometric record for 23FA55. 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 (23FA55) followed by the observatory code and reference code for the source of the astrometry.

2023 03  21.29907  10 36 11.920  +11 12 03.96  23.3r 23FA55    568  C~7xZo      
2023 03  21.49670  10 36 11.020  +11 12 09.00  23.3r 23FA55    568  C~7xZo      
2023 04  22.06157  10 34 20.780  +11 22 38.95  23.4r 23FA55    304  C~7xZo      
2023 04  22.12990  10 34 20.600  +11 22 39.90  23.4r 23FA55    304  C~7xZo      
2023 05  15.09172  10 33 48.380  +11 25 10.97  23.5r 23FA55    304  C~7xZo      
2024 03  07.26482  10 43 12.875  +10 40 51.43  23.4r 23FA55    304  C~7xZo      
2024 03  08.25769  10 43 08.159  +10 41 20.78  23.5r 23FA55    304  C~7xZo      

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     0.10       0.00    -0.03
     2   0.0005    -14.17    -0.11      -0.24    -0.23
     3   0.0870  -1753.79     0.11     -16.90     0.16
     4   0.0871  -1756.60    -0.06     -17.00     0.18
     5   0.1500  -2252.69    -0.05     -51.99    -0.06
     6   0.9636   6451.76    -0.14     585.49    -0.02
     7   0.9663   6376.23     0.14     586.46    -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.

23FA55    quality flag:2

Type:      CLASSICAL  SCATNEAR CLASSICAL

axisobj        44.094    44.779    44.033
ecceobj         0.132     0.218     0.128
incobj          6.520     6.506     6.522
qmin           37.729    31.504    37.867
qmax           50.785    62.754    50.535
amean          44.126    45.862    44.061
amin           43.773    44.021    43.703
amax           44.524    47.462    44.476
emean           0.124     0.261     0.120
emin            0.107     0.209     0.102
emax            0.142     0.325     0.138
imean           5.472     4.560     5.480
imin            4.564     0.063     4.585
imax            6.395    10.048     6.392
excite_mean     0.157     0.276     0.154
fracstop        1.000     1.000     1.000
cjmean          3.073     3.028     3.074

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       180.7     184.1     180.6
kozaiamp        180.0     180.0     179.9