Orbit Fit and Astrometric record for 15GE55

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: 15GE55    
# Created Thu Dec  9 02:13:13 2021
# Orbit generated from Bernstein formalism
# Fitting     35 observations of     35
# Arc:   2.35y
# First observation: 2015/02/17
#  Last observation: 2017/06/25
Preliminary a, adot, b, bdot, g, gdot:
  -0.000103   0.024994   0.000001  -0.000658   0.024666   0.000000
# Chi-squared of fit:    13.32 DOF:     64 RMS:  0.11
# Min/Max residuals:    -0.64    0.25
# Exact a, adot, b, bdot, g, gdot:
  1.591863E-05  2.486101E-02 -1.275364E-07 -6.558439E-04  2.465384E-02  4.180829E-04
# Covariance matrix:
  1.8245E-13  1.1955E-14 -1.1060E-17 -2.4675E-15  1.4485E-13  2.1464E-12
  1.1955E-14  2.8363E-13  1.0835E-15 -7.9207E-15  1.9050E-13  6.5546E-12
 -1.1060E-17  1.0835E-15  8.9575E-14 -6.4111E-14  5.6109E-16  3.8313E-14
 -2.4675E-15 -7.9207E-15 -6.4111E-14  8.5831E-14 -6.9720E-15 -2.6535E-13
  1.4485E-13  1.9050E-13  5.6109E-16 -6.9720E-15  2.6399E-13  5.8871E-12
  2.1464E-12  6.5546E-12  3.8313E-14 -2.6535E-13  5.8871E-12  2.1898E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.974099 -153.788172    0.835328    0.009029   -0.522441  2457071.015468
# Heliocentric elements and errors
Epoch:              2457070.5000  =  2015/02/17
Mean Anomaly:          358.72206 +/-     0.511
Argument of Peri:      148.59841 +/-     0.580
Long of Asc Node:       57.88285 +/-     0.011
Inclination:             1.77263 +/-     0.001
Eccentricity:         0.06228635 +/-    0.0000
Semi-Major Axis:     43.82390710 +/-    0.0026
Time of Perihelion: 2457446.6593 +/-     150.4
Perihelion:          41.09427570 +/-    0.0032
Aphelion:            46.55353849 +/-    0.0034
Period (y)              290.1181 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -37.22579405 +/-    0.0008
Ecliptic Y          -17.39446902 +/-    0.0004
Ecliptic Z            0.68955470 +/-    0.0000
Ecliptic XDOT         0.00117303 +/-    0.0000
Ecliptic YDOT        -0.00250357 +/-    0.0000
Ecliptic ZDOT        -0.00007194 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.09504570 +/-    0.0007
Geocenter to KBO     40.56163991 +/-    0.0008
# Hcoef:  7.89

The following table shows the complete astrometric record for 15GE55. 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 (15GE55) followed by the observatory code and reference code for the source of the astrometry.

2015 02  17.51469  13 38 39.853  -09 12 39.80  24.2r 15GE55    568  C~2lVA      
2015 02  17.55579  13 38 39.764  -09 12 39.25  24.5r 15GE55    568  C~2lVA      
2015 02  20.48657  13 38 33.546  -09 12 00.60  24.1r 15GE55    568  C~2lVA      
2015 03  18.49249  13 37 11.015  -09 03 48.01  24.1r 15GE55    568  C~2lVA      
2015 03  18.53407  13 37 10.842  -09 03 47.25  23.8r 15GE55    568  C~2lVA      
2015 03  20.53726  13 37 02.811  -09 03 00.08  23.9r 15GE55    568  C~2lVA      
2015 04  11.47256  13 35 25.994  -08 53 39.67  23.8r 15GE55    568  C~2lVA      
2015 04  12.37938  13 35 21.804  -08 53 15.45  23.9r 15GE55    568  C~2lVA      
2015 04  12.42509  13 35 21.598  -08 53 14.41  24.1r 15GE55    568  C~2lVA      
2015 04  12.46730  13 35 21.390  -08 53 13.19  24.0r 15GE55    568  C~2lVA      
2015 04  18.43790  13 34 53.579  -08 50 34.51  23.9r 15GE55    568  C~2lVA      
2015 04  18.48560  13 34 53.365  -08 50 32.97  23.9r 15GE55    568  C~2lVA      
2015 05  16.28656  13 32 51.558  -08 39 08.16  23.5r 15GE55    568  C~2lVA      
2015 05  17.24686  13 32 47.880  -08 38 47.89  23.7r 15GE55    568  C~2lVA      
2015 05  25.38864  13 32 18.213  -08 36 05.61  23.9r 15GE55    568  C~2lVA      
2015 05  25.44647  13 32 18.008  -08 36 04.53  24.0r 15GE55    568  C~2lVA      
2015 06  21.33827  13 31 11.425  -08 30 18.92  24.1r 15GE55    568  C~2lVA      
2015 06  22.29486  13 31 10.097  -08 30 12.78  24.2r 15GE55    568  C~2lVA      
2015 07  19.27863  13 31 05.244  -08 30 34.83  24.1r 15GE55    568  C~2lVA      
2016 02  04.61431  13 44 17.572  -09 47 23.66  24.4w 15GE55    568  C~2lVA      
2016 02  11.59753  13 44 10.415  -09 46 36.04  24.0w 15GE55    568  C~2lVA      
2016 04  03.47768  13 41 23.140  -09 30 17.04  24.3w 15GE55    568  C~2lVA      
2016 04  09.45883  13 40 55.768  -09 27 41.65  24.2w 15GE55    568  C~2lVA      
2016 05  01.46556  13 39 14.041  -09 18 10.42  24.3w 15GE55    568  C~2lVA      
2016 05  02.33963  13 39 10.145  -09 17 48.88  24.3w 15GE55    568  C~2lVA      
2016 05  07.34298  13 38 48.172  -09 15 47.13  24.1w 15GE55    568  C~2lVA      
2016 05  29.32744  13 37 24.219  -09 08 10.34  24.4w 15GE55    568  C~2lVA      
2016 06  04.38987  13 37 05.899  -09 06 33.75  24.1w 15GE55    568  C~2lVA      
2016 06  27.32010  13 36 21.606  -09 02 56.26  23.9w 15GE55    568  C~2lVA      
2016 06  27.32513  13 36 21.587  -09 02 56.32  23.7w 15GE55    568  C~2lVA      
2016 07  07.31590  13 36 16.034  -09 02 42.31  24.4w 15GE55    568  C~2lVA      
2017 02  27.64150  13 48 58.694  -10 15 49.28        15GE55    568  C~2lVA      
2017 02  27.64549  13 48 58.665  -10 15 49.13        15GE55    568  C~2lVA      
2017 03  30.49241  13 47 07.028  -10 05 10.97  24.2w 15GE55    568  C~2lVA      
2017 06  25.27303  13 41 43.657  -09 36 03.77  24.9w 15GE55    568  C~2lVA      

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     0.01       0.00    -0.06
     2   0.0001     -1.43    -0.06       0.04    -0.04
     3   0.0081   -101.24    -0.03       2.78     0.07
     4   0.0793  -1418.96     0.00      19.43     0.08
     5   0.0795  -1421.62     0.01      19.21    -0.13
     6   0.0849  -1549.60    -0.02      20.04     0.00
     7   0.1450  -3089.87    -0.09      21.36    -0.03
     8   0.1475  -3156.54     0.05      21.34     0.12
     9   0.1476  -3159.76     0.25      21.20     0.01
    10   0.1477  -3163.08     0.10      21.22     0.05
    11   0.1641  -3604.86    -0.02      19.07    -0.17
    12   0.1642  -3608.38     0.05      19.35     0.15
    13   0.2403  -5540.57    -0.64      -1.34     0.08
    14   0.2429  -5598.79     0.13      -2.39     0.05
    15   0.2652  -6068.01     0.07     -12.09     0.00
    16   0.2654  -6071.24     0.01     -12.20    -0.02
    17   0.3390  -7117.92     0.01     -51.93    -0.05
    18   0.3416  -7138.52     0.07     -53.43     0.01
    19   0.4155  -7197.51     0.11    -100.35     0.02
    20   0.9640   5412.67     0.01    -147.47     0.05
    21   0.9831   5296.76     0.05    -140.85    -0.05
    22   1.1252   2635.50    -0.04    -114.54    -0.01
    23   1.1415   2201.68     0.02    -115.30    -0.06
    24   1.2018    591.41    -0.17    -125.39     0.06
    25   1.2042    529.85    -0.03    -126.13    -0.08
    26   1.2179    182.56     0.01    -130.14    -0.02
    27   1.2781  -1141.60    -0.01    -154.19     0.03
    28   1.2947  -1429.50    -0.01    -162.51    -0.03
    29   1.3574  -2119.83     0.20    -197.85     0.05
    30   1.3575  -2120.07     0.04    -198.01    -0.10
    31   1.3848  -2201.81    -0.08    -214.82    -0.09
    32   2.0291   9906.62     0.15    -262.76     0.03
    33   2.0291   9906.16    -0.13    -262.77     0.01
    34   2.1136   8135.36     0.01    -251.42    -0.03
    35   2.3512   3043.45    -0.03    -328.96     0.12

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.

15GE55    quality flag:2

Type:         7:4EEE    7:4EEE CLASSICAL

axisobj        43.401    43.409    43.393
ecceobj         0.053     0.053     0.053
incobj          1.776     1.776     1.776
qmin           40.447    40.481    40.287
qmax           47.317    47.246    47.434
amean          43.726    43.726    43.725
amin           43.355    43.369    43.358
amax           44.109    44.117    44.118
emean           0.059     0.061     0.048
emin            0.045     0.050     0.026
emax            0.073     0.072     0.075
imean           1.001     1.016     1.036
imin            0.112     0.140     0.168
imax            1.572     1.632     1.631
excite_mean     0.062     0.064     0.052
fracstop        1.000     1.000     1.000
cjmean          3.094     3.093     3.095

libcent 0       174.9     181.4    -180.0
libamp  0       174.8     128.5    -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       180.4     192.0     182.7
kozaiamp        180.0     179.6     179.9