Orbit Fit and Astrometric record for 15GB56

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: 15GB56    
# Created Fri Dec  3 02:13:17 2021
# Orbit generated from Bernstein formalism
# Fitting     30 observations of     30
# Arc:   2.35y
# First observation: 2015/02/17
#  Last observation: 2017/06/24
Preliminary a, adot, b, bdot, g, gdot:
  -0.000111   0.025367   0.000018  -0.014248   0.024062   0.000000
# Chi-squared of fit:     4.47 DOF:     54 RMS:  0.07
# Min/Max residuals:    -0.27    0.14
# Exact a, adot, b, bdot, g, gdot:
  1.640333E-05  2.518031E-02 -9.291753E-06 -1.415067E-02  2.409985E-02 -2.247398E-03
# Covariance matrix:
  1.7095E-13 -1.7893E-14  6.3922E-15 -3.7386E-14  1.2371E-13  1.3006E-12
 -1.7893E-14  4.4877E-13  5.8924E-14 -3.0316E-13  1.9074E-13  1.0395E-11
  6.3922E-15  5.8924E-14  9.4384E-14 -1.1616E-13  3.1529E-14  1.8199E-12
 -3.7386E-14 -3.0316E-13 -1.1616E-13  3.8484E-13 -1.6768E-13 -9.3579E-12
  1.2371E-13  1.9074E-13  3.1529E-14 -1.6768E-13  2.2712E-13  5.7718E-12
  1.3006E-12  1.0395E-11  1.8199E-12 -9.3579E-12  5.7718E-12  3.2084E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    2.918229 -157.006552    0.804010    0.029135   -0.568790  2457071.081158
# Heliocentric elements and errors
Epoch:              2457070.5000  =  2015/02/17
Mean Anomaly:          356.32206 +/-     0.023
Argument of Peri:      189.08999 +/-     0.097
Long of Asc Node:       27.00780 +/-     0.000
Inclination:            29.42729 +/-     0.001
Eccentricity:         0.54835984 +/-    0.0002
Semi-Major Axis:     92.03881015 +/-    0.0311
Time of Perihelion: 2460365.5165 +/-      20.8
Perihelion:          41.56842318 +/-    0.0238
Aphelion:           142.50919713 +/-    0.0518
Period (y)              883.0081 +/-      0.45
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -38.98889992 +/-    0.0008
Ecliptic Y          -15.67000115 +/-    0.0003
Ecliptic Z            2.11210608 +/-    0.0000
Ecliptic XDOT         0.00127316 +/-    0.0000
Ecliptic YDOT        -0.00257126 +/-    0.0000
Ecliptic ZDOT        -0.00161840 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   42.07308219 +/-    0.0007
Geocenter to KBO     41.49402691 +/-    0.0008
# Hcoef:  7.88

The following table shows the complete astrometric record for 15GB56. 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 (15GB56) followed by the observatory code and reference code for the source of the astrometry.

2015 02  17.58038  13 29 26.376  -06 13 37.84  24.2r 15GB56    568  C~2lVD      
2015 02  17.62132  13 29 26.272  -06 13 37.54  24.2r 15GB56    568  C~2lVD      
2015 02  20.61441  13 29 19.049  -06 13 09.14  24.1r 15GB56    568  C~2lVD      
2015 03  18.55881  13 27 51.126  -06 06 56.37  24.3r 15GB56    568  C~2lVD      
2015 03  18.59998  13 27 50.953  -06 06 55.61  24.2r 15GB56    568  C~2lVD      
2015 03  20.56294  13 27 42.815  -06 06 20.51  24.3r 15GB56    568  C~2lVD      
2015 04  11.49722  13 26 04.247  -05 59 22.61  24.0r 15GB56    568  C~2lVD      
2015 04  13.36151  13 25 55.550  -05 58 46.72  23.9r 15GB56    568  C~2lVD      
2015 04  13.40245  13 25 55.353  -05 58 45.91  24.1r 15GB56    568  C~2lVD      
2015 04  13.48799  13 25 54.947  -05 58 44.42  23.7r 15GB56    568  C~2lVD      
2015 04  13.50003  13 25 54.895  -05 58 44.13  24.0r 15GB56    568  C~2lVD      
2015 04  13.50498  13 25 54.863  -05 58 43.99  24.1r 15GB56    568  C~2lVD      
2015 04  19.40228  13 25 27.363  -05 56 52.86  23.9r 15GB56    568  C~2lVD      
2015 04  19.51922  13 25 26.789  -05 56 50.76  22.9r 15GB56    568  C~2lVD      
2015 05  18.27664  13 23 23.594  -05 49 28.25  24.0r 15GB56    568  C~2lVD      
2015 05  18.32493  13 23 23.412  -05 49 27.83  24.2r 15GB56    568  C~2lVD      
2015 06  20.27498  13 21 55.807  -05 47 14.26  24.1r 15GB56    568  C~2lVD      
2015 06  20.31583  13 21 55.746  -05 47 14.42  24.2r 15GB56    568  C~2lVD      
2015 06  22.31959  13 21 53.040  -05 47 23.11  24.3r 15GB56    568  C~2lVD      
2015 07  14.27191  13 21 45.725  -05 51 13.58  24.4r 15GB56    568  C~2lVD      
2015 07  20.26475  13 21 50.981  -05 52 59.80  24.1r 15GB56    568  C~2lVD      
2016 02  04.55115  13 34 01.894  -07 31 48.69  24.4w 15GB56    568  C~2lVD      
2016 02  10.53908  13 33 53.871  -07 31 34.31  24.6w 15GB56    568  C~2lVD      
2016 03  11.54027  13 32 30.883  -07 26 33.58  24.3w 15GB56    568  C~2lVD      
2016 04  03.42104  13 30 53.589  -07 19 53.86  24.3w 15GB56    568  C~2lVD      
2016 04  09.40077  13 30 25.811  -07 18 00.11  24.2w 15GB56    568  C~2lVD      
2016 06  27.28082  13 25 56.755  -07 04 59.86  24.3w 15GB56    568  C~2lVD      
2017 02  24.64250  13 37 37.960  -08 47 28.51        15GB56    568  C~2lVD      
2017 03  29.45933  13 35 35.557  -08 39 51.33  24.2w 15GB56    568  C~2lVD      
2017 06  24.28972  13 30 12.819  -08 22 07.37  24.3w 15GB56    568  C~2lVD      

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     0.02       0.00     0.00
     2   0.0001     -1.55    -0.04      -0.29    -0.09
     3   0.0083   -112.15    -0.04     -13.57    -0.05
     4   0.0793  -1468.44     0.03    -150.53    -0.03
     5   0.0795  -1471.12     0.00    -150.78    -0.01
     6   0.0848  -1596.89     0.09    -162.96    -0.03
     7   0.1449  -3117.76     0.05    -317.84    -0.03
     8   0.1500  -3251.61     0.00    -332.49     0.06
     9   0.1501  -3254.64    -0.04    -332.82     0.08
    10   0.1503  -3260.82     0.03    -333.68    -0.05
    11   0.1504  -3261.65     0.08    -333.69     0.03
    12   0.1504  -3262.15    -0.06    -333.74     0.02
    13   0.1665  -3684.54     0.00    -382.29    -0.01
    14   0.1668  -3693.27    -0.27    -383.51    -0.20
    15   0.2456  -5565.56    -0.06    -653.65     0.14
    16   0.2457  -5568.24     0.01    -654.27     0.04
    17   0.3359  -6832.92     0.03   -1015.81     0.05
    18   0.3360  -6833.70     0.04   -1016.30     0.04
    19   0.3415  -6868.01     0.04   -1039.39    -0.01
    20   0.4016  -6883.75    -0.01   -1294.07     0.10
    21   0.4180  -6771.35     0.04   -1363.56     0.02
    22   0.9636   5540.68     0.03   -2857.03    -0.06
    23   0.9800   5424.30    -0.01   -2887.33     0.12
    24   1.0622   4164.97     0.02   -3059.77    -0.15
    25   1.1248   2671.44    -0.01   -3219.38    -0.03
    26   1.1412   2245.18     0.06   -3265.57     0.11
    27   1.3572  -1765.05     0.02   -4017.83    -0.06
    28   2.0207  10194.08     0.04   -5917.94     0.03
    29   2.1106   8333.12    -0.05   -6153.03    -0.01
    30   2.3483   3482.38    -0.05   -6916.90    -0.02

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.

15GB56    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        90.115    90.173    90.058
ecceobj         0.539     0.539     0.539
incobj         29.528    29.528    29.528
qmin           39.548    39.583    39.469
qmax          145.823   146.018   145.846
amean          91.136    91.222    91.088
amin           89.708    89.857    89.670
amax           93.140    93.293    93.221
emean           0.551     0.552     0.551
emin            0.536     0.537     0.535
emax            0.566     0.566     0.567
imean          28.588    28.608    28.542
imin           28.057    28.100    27.967
imax           29.440    29.439    29.467
excite_mean     0.730     0.730     0.730
fracstop        1.000     1.000     1.000
cjmean          2.879     2.879     2.879

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       261.2     260.2     263.7
kozaiamp         72.8      71.4      75.2