Orbit Fit and Astrometric record for 15GS58

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: 15GS58    
# Created Sun Nov 24 02:10:18 2024
# Orbit generated from Bernstein formalism
# Fitting     31 observations of     31
# Arc:   2.11y
# First observation: 2015/02/17
#  Last observation: 2017/03/29
Preliminary a, adot, b, bdot, g, gdot:
  -0.000105   0.021543   0.000002  -0.000184   0.022868   0.000000
# Chi-squared of fit:    11.29 DOF:     56 RMS:  0.11
# Min/Max residuals:    -0.42    0.19
# Exact a, adot, b, bdot, g, gdot:
  1.494812E-05  2.139273E-02 -9.946068E-11 -1.831420E-04  2.289760E-02 -9.046203E-04
# Covariance matrix:
  1.9016E-13 -1.8327E-14 -5.3957E-16 -4.0670E-16  1.3939E-13  2.2589E-12
 -1.8327E-14  3.0945E-13 -5.2773E-16 -1.4728E-15  1.8124E-13  8.4781E-12
 -5.3957E-16 -5.2773E-16  1.0033E-13 -8.0714E-14 -9.2688E-16 -2.0905E-14
 -4.0670E-16 -1.4728E-15 -8.0714E-14  1.2205E-13 -1.3287E-15 -6.7312E-14
  1.3939E-13  1.8124E-13 -9.2688E-16 -1.3287E-15  2.6576E-13  7.5540E-12
  2.2589E-12  8.4781E-12 -2.0905E-14 -6.7312E-14  7.5540E-12  3.8814E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    1.453286 -154.359787    0.829337    0.013631   -0.531806  2457071.093388
# Heliocentric elements and errors
Epoch:              2457070.5000  =  2015/02/17
Mean Anomaly:          256.23645 +/-     0.288
Argument of Peri:      218.41412 +/-     0.277
Long of Asc Node:       96.60581 +/-     0.034
Inclination:             1.50895 +/-     0.000
Eccentricity:         0.06144307 +/-    0.0009
Semi-Major Axis:     43.42899769 +/-    0.0050
Time of Perihelion: 2487201.2851 +/-      83.4
Perihelion:          40.76058683 +/-    0.0373
Aphelion:            46.09740855 +/-    0.0374
Period (y)              286.2055 +/-      0.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -40.20073957 +/-    0.0009
Ecliptic Y          -18.37442317 +/-    0.0004
Ecliptic Z            1.10762559 +/-    0.0000
Ecliptic XDOT         0.00120019 +/-    0.0000
Ecliptic YDOT        -0.00226505 +/-    0.0000
Ecliptic ZDOT        -0.00002454 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   44.21476816 +/-    0.0008
Geocenter to KBO     43.67269072 +/-    0.0010
# Hcoef:  8.29

The following table shows the complete astrometric record for 15GS58. 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 (15GS58) followed by the observatory code and reference code for the source of the astrometry.

2015 02  17.59261  13 37 12.598  -08 33 26.84  24.8r 15GS58    568  C~2nva      
2015 02  17.63360  13 37 12.518  -08 33 26.27  25.1r 15GS58    568  C~2nva      
2015 02  20.62674  13 37 06.361  -08 32 45.44  24.7r 15GS58    568  C~2nva      
2015 03  18.57107  13 35 47.900  -08 24 36.04  24.6r 15GS58    568  C~2nva      
2015 03  18.61845  13 35 47.707  -08 24 35.13  24.5r 15GS58    568  C~2nva      
2015 03  20.57526  13 35 40.312  -08 23 50.14  25.4r 15GS58    568  C~2nva      
2015 04  11.50958  13 34 09.217  -08 14 50.54  25.0r 15GS58    568  C~2nva      
2015 04  13.37381  13 34 01.095  -08 14 03.41  24.5r 15GS58    568  C~2nva      
2015 04  13.41479  13 34 00.914  -08 14 02.21  24.8r 15GS58    568  C~2nva      
2015 04  13.51735  13 34 00.461  -08 13 59.53  24.5r 15GS58    568  C~2nva      
2015 04  19.41451  13 33 34.699  -08 11 30.76  24.9r 15GS58    568  C~2nva      
2015 04  19.54875  13 33 34.120  -08 11 26.83  24.6r 15GS58    568  C~2nva      
2015 05  18.33721  13 31 37.229  -08 00 26.98  24.2r 15GS58    568  C~2nva      
2015 06  20.28725  13 30 11.931  -07 53 03.41  24.7r 15GS58    568  C~2nva      
2015 06  20.32802  13 30 11.878  -07 53 03.28  25.1r 15GS58    568  C~2nva      
2015 06  22.33199  13 30 09.123  -07 52 51.31  25.0r 15GS58    568  C~2nva      
2015 07  14.28422  13 30 00.266  -07 52 47.07  25.1r 15GS58    568  C~2nva      
2015 07  20.27720  13 30 04.754  -07 53 26.84  24.5r 15GS58    568  C~2nva      
2016 02  04.61026  13 42 07.430  -09 02 44.76  24.9w 15GS58    568  C~2nva      
2016 02  11.59334  13 42 00.076  -09 01 49.50  24.7w 15GS58    568  C~2nva      
2016 03  11.60082  13 40 49.416  -08 54 19.77  24.5w 15GS58    568  C~2nva      
2016 04  03.47362  13 39 20.589  -08 45 32.52  24.9w 15GS58    568  C~2nva      
2016 04  09.45477  13 38 54.832  -08 43 02.84  24.7w 15GS58    568  C~2nva      
2016 05  02.31935  13 37 15.822  -08 33 39.01  24.9w 15GS58    568  C~2nvb      
2016 05  06.32911  13 36 59.261  -08 32 06.52  25.2w 15GS58    568  C~2nvb      
2016 05  29.32744  13 35 36.607  -08 24 36.74  24.8w 15GS58    568  C~2nvb      
2016 06  04.38987  13 35 19.458  -08 23 07.52  24.8w 15GS58    568  C~2nvb      
2016 06  27.32513  13 34 37.898  -08 19 51.18  24.6w 15GS58    568  C~2nvb      
2016 07  07.31590  13 34 32.581  -08 19 41.95  24.9w 15GS58    568  C~2nvb      
2017 03  29.47811  13 44 23.993  -09 15 08.95        15GS58    568  C~2nvb      
2017 03  29.49962  13 44 23.916  -09 15 08.52  24.8w 15GS58    568  C~2nvb      

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    -0.03
     2   0.0001     -1.31    -0.01       0.10     0.02
     3   0.0083   -101.23     0.15       5.03     0.07
     4   0.0793  -1363.56     0.08      38.36     0.09
     5   0.0795  -1366.56    -0.03      38.17    -0.13
     6   0.0848  -1485.15     0.06      40.19     0.16
     7   0.1449  -2941.02    -0.11      50.61     0.04
     8   0.1500  -3070.50    -0.08      50.55    -0.18
     9   0.1501  -3073.44    -0.13      50.68    -0.03
    10   0.1504  -3080.68    -0.12      50.73     0.05
    11   0.1665  -3491.17    -0.08      49.78    -0.42
    12   0.1669  -3500.61    -0.05      50.30     0.18
    13   0.2457  -5358.43     0.10      30.31    -0.00
    14   0.3359  -6701.17     0.01     -21.17     0.15
    15   0.3360  -6701.95     0.18     -21.33     0.08
    16   0.3415  -6744.47    -0.02     -25.21     0.02
    17   0.4016  -6868.59     0.13     -69.56     0.05
    18   0.4180  -6791.88    -0.04     -82.11    -0.06
    19   0.9638   4711.11     0.00     -61.02     0.07
    20   0.9829   4589.52    -0.04     -48.63    -0.10
    21   1.0623   3450.43     0.19      -5.99     0.19
    22   1.1249   2032.02     0.13      10.60    -0.09
    23   1.1413   1621.83    -0.01      12.12    -0.02
    24   1.2039     48.98    -0.03       6.00    -0.10
    25   1.2149   -213.49    -0.19       3.09    -0.06
    26   1.2779  -1519.42    -0.02     -23.22     0.05
    27   1.2944  -1788.94    -0.09     -32.66    -0.02
    28   1.3572  -2434.94     0.11     -74.28    -0.03
    29   1.3846  -2511.81    -0.02     -94.43    -0.01
    30   2.1106   6867.56    -0.12     -29.90     0.04
    31   2.1106   6866.34     0.09     -29.91     0.03

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.

15GS58    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        43.046    43.057    43.034
ecceobj         0.067     0.068     0.065
incobj          1.509     1.509     1.509
qmin           39.652    39.590    39.717
qmax           47.255    47.315    47.161
amean          43.327    43.338    43.315
amin           42.986    42.994    42.975
amax           43.687    43.695    43.672
emean           0.064     0.066     0.063
emin            0.043     0.044     0.042
emax            0.082     0.083     0.080
imean           1.186     1.193     1.180
imin            0.000     0.000     0.020
imax            1.834     1.849     1.820
excite_mean     0.068     0.070     0.067
fracstop        1.000     1.000     1.000
cjmean          3.088     3.088     3.088

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       177.6     177.5     177.8
kozaiamp        180.0     180.0     180.0