Orbit Fit and Astrometric record for 15GG55

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: 15GG55    
# Created Tue Dec  7 02:13:21 2021
# Orbit generated from Bernstein formalism
# Fitting     25 observations of     25
# Arc:   2.34y
# First observation: 2015/02/17
#  Last observation: 2017/06/22
Preliminary a, adot, b, bdot, g, gdot:
  -0.000110   0.030771   0.000005   0.000479   0.027591   0.000000
# Chi-squared of fit:     5.81 DOF:     44 RMS:  0.09
# Min/Max residuals:    -0.26    0.18
# Exact a, adot, b, bdot, g, gdot:
  1.755956E-05  3.069930E-02  8.136350E-07  4.799454E-04  2.762929E-02  2.156889E-03
# Covariance matrix:
  2.1959E-13  2.6015E-14 -2.3870E-15  2.7739E-15  1.8424E-13  2.0189E-12
  2.6015E-14  5.8592E-13 -5.3067E-15  1.3758E-14  3.2022E-13  1.1547E-11
 -2.3870E-15 -5.3067E-15  1.0516E-13 -7.3799E-14 -5.1874E-15 -1.2456E-13
  2.7739E-15  1.3758E-14 -7.3799E-14  1.1626E-13  9.1943E-15  3.3864E-13
  1.8424E-13  3.2022E-13 -5.1874E-15  9.1943E-15  3.6312E-13  7.3315E-12
  2.0189E-12  1.1547E-11 -1.2456E-13  3.3864E-13  7.3315E-12  2.8564E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    2.841179 -157.999989    0.794099    0.029052   -0.582550  2457071.072988
# Heliocentric elements and errors
Epoch:              2457070.5000  =  2015/02/17
Mean Anomaly:           14.40668 +/-     0.138
Argument of Peri:       50.82029 +/-     0.202
Long of Asc Node:      129.60791 +/-     0.012
Inclination:             2.95344 +/-     0.000
Eccentricity:         0.16709786 +/-    0.0002
Semi-Major Axis:     43.77262419 +/-    0.0052
Time of Perihelion: 2452837.3500 +/-      40.6
Perihelion:          36.45831229 +/-    0.0117
Aphelion:            51.08693608 +/-    0.0125
Period (y)              289.6090 +/-      0.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -34.35780771 +/-    0.0007
Ecliptic Y          -13.02386531 +/-    0.0003
Ecliptic Z            1.79405399 +/-    0.0000
Ecliptic XDOT         0.00094019 +/-    0.0000
Ecliptic YDOT        -0.00290521 +/-    0.0000
Ecliptic ZDOT         0.00005819 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   36.78720767 +/-    0.0007
Geocenter to KBO     36.19346987 +/-    0.0008
# Hcoef:  9.08

The following table shows the complete astrometric record for 15GG55. 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 (15GG55) followed by the observatory code and reference code for the source of the astrometry.

2015 02  17.57221  13 25 36.987  -05 55 55.49  24.5r 15GG55    568  C~2lVA      
2015 02  17.61316  13 25 36.887  -05 55 54.65  24.8r 15GG55    568  C~2lVA      
2015 02  20.60593  13 25 29.240  -05 54 55.60  25.0r 15GG55    568  C~2lVA      
2015 03  18.55062  13 23 54.521  -05 43 58.07  24.5r 15GG55    568  C~2lVA      
2015 03  18.59161  13 23 54.334  -05 43 56.81  24.1r 15GG55    568  C~2lVA      
2015 04  11.48904  13 21 58.707  -05 31 48.20  24.4r 15GG55    568  C~2lVA      
2015 04  13.35330  13 21 49.315  -05 30 51.06  24.5r 15GG55    568  C~2lVA      
2015 04  13.39426  13 21 49.090  -05 30 49.84  24.8r 15GG55    568  C~2lVA      
2015 04  13.46376  13 21 48.738  -05 30 47.69  24.3r 15GG55    568  C~2lVA      
2015 04  13.46849  13 21 48.716  -05 30 47.66  24.7r 15GG55    568  C~2lVA      
2015 04  19.39411  13 21 18.906  -05 27 49.22  25.2r 15GG55    568  C~2lVA      
2015 04  19.50579  13 21 18.346  -05 27 45.62  24.8r 15GG55    568  C~2lVA      
2015 05  18.26844  13 19 07.281  -05 15 22.00  24.5r 15GG55    568  C~2lVA      
2015 06  20.26671  13 17 40.017  -05 08 37.07  24.9r 15GG55    568  C~2lVA      
2015 06  20.30767  13 17 39.963  -05 08 36.90  24.6r 15GG55    568  C~2lVA      
2015 06  22.31136  13 17 37.698  -05 08 32.24  25.6r 15GG55    568  C~2lVA      
2016 02  04.54302  13 32 35.576  -06 36 34.87  25.3w 15GG55    568  C~2lVA      
2016 04  03.41700  13 29 16.861  -06 13 37.09  24.7w 15GG55    568  C~2lVA      
2016 04  09.39674  13 28 46.954  -06 10 34.62  25.1w 15GG55    568  C~2lVA      
2016 05  01.39731  13 26 57.668  -05 59 54.78  24.1w 15GG55    568  C~2lVA      
2016 05  28.26386  13 25 07.420  -05 50 04.36  24.8w 15GG55    568  C~2lVA      
2016 06  04.34531  13 24 46.084  -05 48 22.65  25.1w 15GG55    568  C~2lVA      
2017 02  24.63168  13 38 32.083  -07 08 00.35        15GG55    568  C~2lVA      
2017 03  29.44523  13 36 23.387  -06 53 49.91  24.7w 15GG55    568  C~2lVA      
2017 06  22.27110  13 30 45.483  -06 23 25.14  25.2w 15GG55    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     0.00       0.00    -0.11
     2   0.0001     -1.70     0.02       0.23    -0.04
     3   0.0083   -129.55    -0.05      12.76    -0.03
     4   0.0793  -1686.13     0.06      98.68    -0.15
     5   0.0795  -1689.19     0.03      98.81    -0.10
     6   0.1449  -3562.70     0.07     133.28     0.04
     7   0.1500  -3714.17     0.09     134.11     0.13
     8   0.1501  -3717.74    -0.10     133.99     0.03
     9   0.1503  -3723.42    -0.04     134.03     0.09
    10   0.1503  -3723.74     0.04     133.93    -0.01
    11   0.1665  -4203.45     0.06     133.77    -0.26
    12   0.1668  -4212.56     0.08     133.99     0.05
    13   0.2456  -6307.43     0.02      93.96     0.18
    14   0.3359  -7669.45    -0.06     -17.56     0.10
    15   0.3360  -7670.26    -0.08     -17.70     0.14
    16   0.3415  -7703.44    -0.08     -26.04     0.03
    17   0.9636   6703.26    -0.14      37.83    -0.18
    18   1.1248   3439.92     0.03     227.26    -0.00
    19   1.1412   2957.96     0.06     232.11     0.04
    20   1.2014   1206.67    -0.07     223.72     0.12
    21   1.2750   -539.94     0.02     162.46    -0.01
    22   1.2944   -873.34    -0.00     138.76     0.04
    23   2.0207  12346.44    -0.05     228.38     0.01
    24   2.1105  10245.89     0.04     320.02    -0.03
    25   2.3428   4885.53     0.07     168.10    -0.05

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.

15GG55    quality flag:2

Type:         7:4EEE    7:4EEE  SCATNEAR

axisobj        43.313    43.334    43.293
ecceobj         0.158     0.159     0.157
incobj          2.957     2.957     2.957
qmin           35.923    35.810    35.794
qmax           52.217    52.306    52.292
amean          43.726    43.727    43.748
amin           43.222    43.280    43.218
amax           44.295    44.270    44.281
emean           0.166     0.167     0.151
emin            0.151     0.153     0.114
emax            0.179     0.182     0.181
imean           2.442     2.362     2.652
imin            1.195     1.476     0.863
imax            3.618     3.301     4.545
excite_mean     0.172     0.172     0.160
fracstop        1.000     1.000     1.000
cjmean          3.062     3.062     3.067

libcent 0       178.6     178.3    -180.0
libamp  0       143.5     112.5    -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       174.3     149.7     193.3
kozaiamp        179.9     178.9     180.0