Orbit Fit and Astrometric record for 19SP235

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: 19SP235   
# Created Tue Apr  1 01:11:16 2025
# Orbit generated from Bernstein formalism
# Fitting      8 observations of      8
# Arc:   2.10y
# First observation: 2019/08/30
#  Last observation: 2021/10/06
Preliminary a, adot, b, bdot, g, gdot:
   0.000010   0.021871   0.000001  -0.001241   0.023260   0.000000
# Chi-squared of fit:     3.04 DOF:     10 RMS:  0.11
# Min/Max residuals:    -0.28    0.17
# Exact a, adot, b, bdot, g, gdot:
  1.429799E-05  2.181378E-02 -9.747422E-07 -1.237062E-03  2.318191E-02 -1.456163E-03
# Covariance matrix:
  7.3956E-13  6.1605E-13  4.2036E-15 -3.9640E-14  1.6411E-12  1.5240E-11
  6.1605E-13  4.6276E-12  3.3412E-14 -2.7734E-13  5.1329E-12  1.0945E-10
  4.2036E-15  3.3412E-14  3.5392E-13 -2.0723E-13  3.3124E-14  8.8160E-13
 -3.9640E-14 -2.7734E-13 -2.0723E-13  2.6507E-13 -2.8884E-13 -7.2099E-12
  1.6411E-12  5.1329E-12  3.3124E-14 -2.8884E-13  8.0018E-12  1.1281E-10
  1.5240E-11  1.0945E-10  8.8160E-13 -7.2099E-12  1.1281E-10  2.8546E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.972022   -7.598261    0.273037   -0.033253   -0.965949  2458725.713221
# Heliocentric elements and errors
Epoch:              2458720.5000  =  2019/08/25
Mean Anomaly:          272.15198 +/-     0.377
Argument of Peri:      306.49144 +/-     0.298
Long of Asc Node:      141.40809 +/-     0.010
Inclination:             3.78137 +/-     0.001
Eccentricity:         0.06964900 +/-    0.0024
Semi-Major Axis:     44.01035507 +/-    0.0246
Time of Perihelion: 2484743.6709 +/-     109.5
Perihelion:          40.94507790 +/-    0.1089
Aphelion:            47.07563223 +/-    0.1097
Period (y)              291.9715 +/-      0.24
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           43.65775351 +/-    0.0052
Ecliptic Y           -6.10590656 +/-    0.0007
Ecliptic Z           -1.48445364 +/-    0.0002
Ecliptic XDOT         0.00017376 +/-    0.0000
Ecliptic YDOT         0.00257762 +/-    0.0000
Ecliptic ZDOT        -0.00014032 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   44.10765397 +/-    0.0052
Geocenter to KBO     43.13707521 +/-    0.0053
# Hcoef:  9.48

The following table shows the complete astrometric record for 19SP235. 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 (19SP235) followed by the observatory code and reference code for the source of the astrometry.

2019 08  30.212420 23 35 12.848  -04 49 35.12  25.9r 19SP235   W84  C~7XM8      
2019 08  30.387214 23 35 12.117  -04 49 40.04  25.9r 19SP235   W84  C~7XM8      
2019 09  28.012277 23 33 11.999  -05 02 56.47  25.7r 19SP235   W84  C~7XM8      
2019 09  28.177548 23 33 11.288  -05 03 00.50  25.7r 19SP235   W84  C~7XM8      
2020 10  18.012125 23 36 35.107  -04 45 36.88  25.8r 19SP235   W84  C~7XM8      
2020 10  18.176134 23 36 34.524  -04 45 40.30  25.8r 19SP235   W84  C~7XM8      
2021 10  06.002765 23 42 05.973  -04 14 44.84  25.9r 19SP235   W84  C~7XM8      
2021 10  06.167954 23 42 05.283  -04 14 49.13  25.9r 19SP235   W84  C~7XM8      

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     0.12       0.00     0.03
     2   0.0005    -11.98    -0.12      -0.20     0.01
     3   0.0788  -1975.75     0.02     -22.08    -0.28
     4   0.0793  -1987.10    -0.02     -21.58     0.17
     5   1.1357   1223.43    -0.05    -268.04     0.04
     6   1.1361   1214.08     0.06    -267.73     0.13
     7   2.1021   6501.89     0.11    -532.72    -0.06
     8   2.1025   6490.70    -0.11    -532.55    -0.02

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.

19SP235    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        44.109    44.165    44.054
ecceobj         0.074     0.078     0.069
incobj          3.778     3.778     3.779
qmin           39.516    39.397    39.634
qmax           48.702    48.904    48.430
amean          43.971    44.026    43.918
amin           43.620    43.676    43.559
amax           44.352    44.405    44.296
emean           0.081     0.086     0.077
emin            0.065     0.068     0.060
emax            0.098     0.102     0.093
imean           3.229     3.232     3.225
imin            2.480     2.481     2.478
imax            3.931     3.935     3.929
excite_mean     0.099     0.103     0.096
fracstop        1.000     1.000     1.000
cjmean          3.089     3.089     3.089

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       178.9     178.7     178.3
kozaiamp        180.0     180.0     179.9