Orbit Fit and Astrometric record for 24OR4

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: 24OR4     
# Created Fri Jul  4 01:12:17 2025
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     36 observations of     42
# Arc:   9.60y
# First observation: 2015/02/16
#  Last observation: 2024/09/23
# Chi-squared of fit:    23.35 DOF:     66 RMS:  0.14
# Min/Max residuals:    -0.39    0.45
# Exact a, adot, b, bdot, g, gdot:
  6.344186E-04  6.262469E-02 -1.122987E-05 -4.362616E-03  4.335254E-02 -2.424133E-02
# Covariance matrix:
  7.1435E-13 -1.8204E-13 -1.2048E-15  7.4152E-15 -6.9303E-14 -1.1538E-13
 -1.8204E-13  1.3089E-13  1.9729E-15 -7.6888E-15  6.8098E-14  1.2145E-13
 -1.2048E-15  1.9729E-15  6.0233E-13 -6.4340E-14 -3.1403E-15  2.0374E-15
  7.4152E-15 -7.6888E-15 -6.4340E-14  7.5752E-15 -4.8830E-15 -7.5267E-15
 -6.9303E-14  6.8098E-14 -3.1403E-15 -4.8830E-15  6.6092E-14  6.6111E-14
 -1.1538E-13  1.2145E-13  2.0374E-15 -7.5267E-15  6.6111E-14  1.1916E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
   18.353066  -84.509925    0.771962   -0.192503    0.580817  2457069.877768
# Heliocentric elements and errors
Epoch:              2457070.5000  =  2015/02/17
Mean Anomaly:          336.30669 +/-     0.001
Argument of Peri:      171.37571 +/-     0.002
Long of Asc Node:      173.57427 +/-     0.000
Inclination:            19.09537 +/-     0.000
Eccentricity:         0.51850202 +/-    0.0000
Semi-Major Axis:     35.69149662 +/-    0.0004
Time of Perihelion: 2462196.3850 +/-       1.1
Perihelion:          17.18538370 +/-    0.0004
Aphelion:            54.19760955 +/-    0.0007
Period (y)              213.2335 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X            1.27920850 +/-    0.0000
Ecliptic Y          -21.25581382 +/-    0.0001
Ecliptic Z            7.26277343 +/-    0.0000
Ecliptic XDOT         0.00380243 +/-    0.0000
Ecliptic YDOT         0.00173285 +/-    0.0000
Ecliptic ZDOT        -0.00074345 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   22.49897269 +/-    0.0001
Geocenter to KBO     23.06691094 +/-    0.0001
# Hcoef:  8.55

The following table shows the complete astrometric record for 24OR4. 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 (24OR4) followed by the observatory code and reference code for the source of the astrometry.

2015 02  16.376990 18 20 55.17   -04 59 11.8         24OR4     W84  C~8vOg      
2015 02  16.385249 18 20 55.24   -04 59 11.5         24OR4     W84  C~8vOg      
2019 06  10.192572 19 29 59.903  -03 55 57.92  22.1g 24OR4     W84  C~8vOg      
2023 08  12.990897 20 46 57.382  -04 05 21.85  20.9V 24OR4     Y89  B~8vOg      
2023 08  13.004734 20 46 57.259  -04 05 22.49  20.6V 24OR4     Y89  B~8vOg      
2023 08  13.017841 20 46 57.088  -04 05 22.27  20.8V 24OR4     Y89  B~8vOg      
2024 06  15.537628 21 18 07.654  -03 22 16.88  21.1G 24OR4     F52  C~8AlF      
2024 06  15.550239 21 18 07.600  -03 22 16.88  21.1G 24OR4     F52  C~8AlF      
2024 06  15.562889 21 18 07.551  -03 22 16.93  20.8G 24OR4     F52  C~8AlF      
2024 06  15.575564 21 18 07.503  -03 22 16.88  21.1G 24OR4     F52  C~8AlG      
2024 06  20.557817 21 17 46.239  -03 22 29.85  20.9G 24OR4     F52  C~8AlG      
2024 06  20.570498 21 17 46.156  -03 22 29.87  22.1G 24OR4     F52  C~8AlG      
2024 06  20.583163 21 17 46.095  -03 22 29.57  21.6G 24OR4     F52  C~8AlG      
2024 06  28.572431 21 17 03.443  -03 23 55.07  21.0G 24OR4     F51  C~8AlG      
2024 06  28.581536 21 17 03.383  -03 23 55.23  21.0G 24OR4     F51  C~8AlG      
2024 06  28.590616 21 17 03.327  -03 23 55.37  21.1G 24OR4     F51  C~8AlG      
2024 06  28.599904 21 17 03.269  -03 23 55.62  21.1G 24OR4     F51  C~8AlG      
2024 07  03.525020 21 16 32.127  -03 25 27.49  21.1G 24OR4     F51  C~8AlG      
2024 07  03.536473 21 16 32.047  -03 25 27.78  21.0G 24OR4     F51  C~8AlG      
2024 07  03.547881 21 16 31.975  -03 25 28.05  21.2G 24OR4     F51  C~8AlG      
2024 07  03.559290 21 16 31.894  -03 25 28.26  21.0G 24OR4     F51  C~8AlG      
2024 07  26.451338 21 13 30.454  -03 38 48.21  21.9G 24OR4     F51  C~8AlG      
2024 07  26.458658 21 13 30.403  -03 38 48.49  21.0G 24OR4     F51  C~8AlG      
2024 07  30.66277  21 12 52.71   -03 42 15.2   20.9R 24OR4     D29  C~8AlG      
2024 07  30.68314  21 12 52.53   -03 42 16.2   21.4R 24OR4     D29  C~8AlG      
2024 07  30.70634  21 12 52.28   -03 42 17.5   21.0R 24OR4     D29  C~8AlG      
2024 07  31.34989  21 12 46.50   -03 42 50.7   20.2G 24OR4     673  C~8AlG      
2024 07  31.37821  21 12 46.20   -03 42 52.0         24OR4     673  C~8AlG      
2024 08  03.224735 21 12 20.25   -03 45 23.4   20.9G 24OR4     H21  C~8AlG      
2024 08  03.230426 21 12 20.18   -03 45 24.0   20.9G 24OR4     H21  C~8AlG      
2024 08  03.233559 21 12 20.16   -03 45 24.2   21.0G 24OR4     H21  C~8AlG      
2024 09  09.300605 21 07 01.323  -04 25 43.26  21.0w 24OR4     F52  C~8Dt6      
2024 09  09.313867 21 07 01.225  -04 25 44.25  21.0w 24OR4     F52  C~8Dt6      
2024 09  09.327137 21 07 01.131  -04 25 45.18  20.9w 24OR4     F52  C~8Dt6      
2024 09  09.340407 21 07 01.030  -04 25 46.12  21.0w 24OR4     F52  C~8Dt6      
2024 09  23.328975 21 05 35.628  -04 42 11.50  21.1w 24OR4     F52  C~8HfH      
2024 09  23.341682 21 05 35.579  -04 42 12.35  21.0w 24OR4     F52  C~8HfH      
2024 09  23.354387 21 05 35.507  -04 42 13.36  21.2w 24OR4     F52  C~8HfH      
2024 10  04.222446 21 04 51.709  -04 54 20.94  21.0w 24OR4     F52  C~8HfH      
2024 10  04.235772 21 04 51.663  -04 54 21.77  21.1w 24OR4     F52  C~8HfH      
2024 10  04.249118 21 04 51.613  -04 54 22.71  21.2w 24OR4     F52  C~8HfH      
2024 10  04.262477 21 04 51.571  -04 54 23.73  21.0w 24OR4     F52  C~8HfH      

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 (-126.61)      0.00 (  -2.84)
     2   0.0000      0.00 (-126.64)      0.00 (  -2.87)
     3   4.3116      0.00 ( -55.82)      0.00 (  -1.91)
     4   8.4863      0.00 (  -4.10)      0.00 (  -0.33)
     5   8.4863      0.00 (  -4.04)      0.00 (  -0.15)
     6   8.4864      0.00 (  -4.80)      0.00 (   0.84)
     7   9.3283      0.00     0.03       0.00    -0.03
     8   9.3283      0.00    -0.02       0.00    -0.04
     9   9.3284      0.00     0.01       0.00    -0.10
    10   9.3284      0.00     0.05       0.00    -0.05
    11   9.3420      0.00    -0.02       0.00    -0.07
    12   9.3421      0.00    -0.33       0.00    -0.02
    13   9.3421      0.00    -0.31       0.00     0.36
    14   9.3640      0.00     0.08       0.00     0.04
    15   9.3640      0.00     0.02       0.00     0.02
    16   9.3640      0.00     0.02       0.00     0.03
    17   9.3641      0.00     0.01       0.00    -0.08
    18   9.3775      0.00    -0.02       0.00     0.02
    19   9.3776      0.00    -0.04       0.00    -0.03
    20   9.3776      0.00     0.06       0.00    -0.05
    21   9.3776      0.00     0.02       0.00    -0.01
    22   9.4403      0.00    -0.22       0.00    -0.07
    23   9.4403      0.00     0.01       0.00    -0.00
    24   9.4518      0.00     0.02       0.00     0.20
    25   9.4519      0.00     0.15       0.00     0.24
    26   9.4520      0.00    -0.39       0.00     0.13
    27   9.4537      0.00     0.45       0.00     0.09
    28   9.4538      0.00    -0.12       0.00     0.25
    29   9.4616      0.00     0.15       0.00    -0.02
    30   9.4616      0.00    -0.10       0.00    -0.31
    31   9.4616      0.00     0.04       0.00    -0.34
    32   9.5631      0.00     0.02       0.00     0.04
    33   9.5631      0.00     0.00       0.00    -0.00
    34   9.5632      0.00     0.05       0.00     0.01
    35   9.5632      0.00    -0.01       0.00     0.02
    36   9.6015      0.00     0.00       0.00     0.03
    37   9.6015      0.00     0.26       0.00     0.05
    38   9.6016      0.00     0.17       0.00    -0.08
    39   9.6313      0.00     0.13       0.00     0.12
    40   9.6314      0.00     0.08       0.00     0.15
    41   9.6314      0.00    -0.03       0.00     0.07
    42   9.6314      0.00    -0.02       0.00    -0.09

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.

24OR4    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        35.679    35.679    35.679
ecceobj         0.521     0.521     0.521
incobj         19.116    19.116    19.116
qmin           16.879    16.896    16.942
qmax           58.308    56.152    55.143
amean          36.325    35.970    35.077
amin           35.492    35.436    33.506
amax           38.161    36.673    36.150
emean           0.523     0.521     0.501
emin            0.512     0.510     0.456
emax            0.539     0.531     0.526
imean          18.727    18.654    19.188
imin           18.206    18.235    18.203
imax           20.049    19.710    21.044
excite_mean     0.614     0.611     0.599
fracstop        0.024     0.023     0.028
cjmean          2.607     2.611     2.628

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       193.9     194.7     195.5
kozaiamp         20.3      23.0      23.4