Orbit Fit and Astrometric record for 24PL17

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: 24PL17    
# Created Wed Dec 25 02:11:23 2024
# Orbit generated from Bernstein formalism
# Fitting     16 observations of     16
# Arc:   0.93y
# First observation: 2023/10/05
#  Last observation: 2024/09/08
Preliminary a, adot, b, bdot, g, gdot:
   0.000031  -0.170418  -0.000085   0.051812   0.102534   0.000000
# Chi-squared of fit:     7.31 DOF:     26 RMS:  0.12
# Min/Max residuals:    -0.35    0.27
# Exact a, adot, b, bdot, g, gdot:
 -2.715248E-05 -1.461563E-01  7.712443E-06  4.590379E-02  8.577616E-02 -1.403801E-01
# Covariance matrix:
  3.6715E-13 -5.8063E-13 -2.1953E-17  6.5480E-14  7.3802E-14  1.3288E-12
 -5.8063E-13  3.9404E-10  7.4155E-13 -1.1464E-10 -2.4831E-10 -2.4385E-09
 -2.1953E-17  7.4155E-13  3.6712E-13 -6.1690E-13 -4.7623E-13 -4.5442E-12
  6.5480E-14 -1.1464E-10 -6.1690E-13  3.4099E-11  7.1972E-11  7.1276E-10
  7.3802E-14 -2.4831E-10 -4.7623E-13  7.1972E-11  1.5770E-10  1.5326E-09
  1.3288E-12 -2.4385E-09 -4.5442E-12  7.1276E-10  1.5326E-09  1.5150E-08
#      lat0       lon0       xBary       yBary       zBary        JD0
  -35.915922    3.564245   -0.137995   -0.576139   -0.795092  2460222.928375
# Heliocentric elements and errors
Epoch:              2460220.5000  =  2023/10/03
Mean Anomaly:          357.71736 +/-     0.047
Argument of Peri:       26.21704 +/-     0.008
Long of Asc Node:      307.20212 +/-     0.003
Inclination:           142.03030 +/-     0.001
Eccentricity:         0.92203538 +/-    0.0011
Semi-Major Axis:     84.29188341 +/-    1.1535
Time of Perihelion: 2462012.8046 +/-       0.9
Perihelion:           6.57178487 +/-    0.1284
Aphelion:           162.01198195 +/-    2.2190
Period (y)              773.9036 +/-     15.89
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           10.40335195 +/-    0.0014
Ecliptic Y            0.78768419 +/-    0.0001
Ecliptic Z           -6.83863718 +/-    0.0010
Ecliptic XDOT        -0.00247805 +/-    0.0000
Ecliptic YDOT        -0.00482041 +/-    0.0000
Ecliptic ZDOT         0.00381503 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   12.47465979 +/-    0.0013
Geocenter to KBO     11.65825139 +/-    0.0017
# Hcoef: 10.81

The following table shows the complete astrometric record for 24PL17. 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 (24PL17) followed by the observatory code and reference code for the source of the astrometry.

2023 10  05.427574 01 16 18.311  -31 12 33.33  21.8w 24PL17    F51  C~8Hfg      
2023 10  05.438528 01 16 18.020  -31 12 35.17  21.9w 24PL17    F51  C~8Hfg      
2023 10  05.449485 01 16 17.665  -31 12 36.39  21.6w 24PL17    F51  C~8Hfg      
2023 10  05.460442 01 16 17.370  -31 12 37.62  21.6w 24PL17    F51  C~8Hfg      
2024 08  15.501591 00 54 20.061  -29 55 40.18  21.4w 24PL17    F51  C~8Hfg      
2024 08  15.511285 00 54 19.840  -29 55 42.43  21.3w 24PL17    F51  C~8Hfg      
2024 08  15.520962 00 54 19.615  -29 55 44.46  21.2w 24PL17    F51  C~8Hfg      
2024 08  15.530639 00 54 19.387  -29 55 46.98  21.4w 24PL17    F51  C~8Hfg      
2024 09  01.504431 00 46 54.418  -30 59 09.81  21.1G 24PL17    F51  C~8Hfg      
2024 09  07.480050 00 43 54.260  -31 19 42.33  21.2w 24PL17    F51  C~8Hfg      
2024 09  07.491588 00 43 53.884  -31 19 44.48  21.4w 24PL17    F51  C~8Hfg      
2024 09  07.503198 00 43 53.525  -31 19 46.75  21.4w 24PL17    F51  C~8Hfg      
2024 09  07.568280 00 43 51.508  -31 19 59.66  21.7G 24PL17    F51  C~8Hfg      
2024 09  07.568925 00 43 51.471  -31 19 59.86  21.8G 24PL17    F51  C~8Hfg      
2024 09  08.468747 00 43 23.470  -31 22 58.20  21.7G 24PL17    T12  C~8Hfg      
2024 09  08.469827 00 43 23.433  -31 22 58.46  21.9G 24PL17    T12  C~8Hfg      

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     0.04       0.00     0.15
     2   0.0000     -4.16     0.12       0.10    -0.35
     3   0.0001     -8.76    -0.24       1.14     0.07
     4   0.0001    -12.68     0.08       1.80     0.13
     5   0.8626 -13260.37    -0.06   11694.27    -0.02
     6   0.8627 -13263.94     0.00   11693.44    -0.04
     7   0.8627 -13267.47     0.10   11692.83     0.15
     8   0.8627 -13271.24    -0.04   11691.79    -0.09
     9   0.9092 -20133.68    -0.02   10608.97    -0.05
    10   0.9255 -22777.59    -0.05   10413.12    -0.10
    11   0.9256 -22782.94    -0.15   10413.08     0.12
    12   0.9256 -22788.13    -0.07   10412.84     0.13
    13   0.9258 -22817.36     0.27   10411.35     0.01
    14   0.9258 -22817.88     0.05   10411.35     0.03
    15   0.9282 -23223.31     0.01   10391.14    -0.05
    16   0.9282 -23223.85    -0.04   10391.09    -0.08

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.

24PL17    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        83.054    84.132    82.011
ecceobj         0.922     0.923     0.920
incobj        142.039   142.036   142.042
qmin            6.372     6.345     6.343
qmax          175.583   187.379   194.657
amean          81.165    88.187    90.184
amin           71.820    77.261    73.887
amax           91.262    97.625   101.162
emean           0.912     0.918     0.918
emin            0.893     0.902     0.900
emax            0.926     0.926     0.927
imean         141.538   140.207   139.918
imin          138.793   136.569   135.883
imax          144.135   143.976   144.051
excite_mean     1.104     1.119     1.122
fracstop        0.058     0.090     0.094
cjmean         -0.683    -0.702    -0.712

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        30.9      31.1      31.1
kozaiamp          4.1       4.1       4.5