Orbit Fit and Astrometric record for 15KO175

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: 15KO175   
# Created Thu Dec  9 02:13:21 2021
# Orbit generated from Bernstein formalism
# Fitting     28 observations of     28
# Arc:   2.44y
# First observation: 2015/03/19
#  Last observation: 2017/08/26
Preliminary a, adot, b, bdot, g, gdot:
  -0.000107   0.020717  -0.000057  -0.011890   0.024706   0.000000
# Chi-squared of fit:     5.68 DOF:     50 RMS:  0.08
# Min/Max residuals:    -0.19    0.13
# Exact a, adot, b, bdot, g, gdot:
  1.329778E-05  2.067965E-02 -8.178709E-06 -1.203472E-02  2.470112E-02  2.443906E-03
# Covariance matrix:
  1.5529E-13 -1.5763E-14  8.1823E-15 -5.0607E-14  1.1331E-13  2.0737E-12
 -1.5763E-14  2.2591E-13  3.3204E-14 -1.5938E-13  1.5661E-13  6.2803E-12
  8.1823E-15  3.3204E-14  1.1455E-13 -1.2301E-13  3.0884E-14  1.9546E-12
 -5.0607E-14 -1.5938E-13 -1.2301E-13  3.3390E-13 -1.6630E-13 -8.9971E-12
  1.1331E-13  1.5661E-13  3.0884E-14 -1.6630E-13  2.6469E-13  6.6796E-12
  2.0737E-12  6.2803E-12  1.9546E-12 -8.9971E-12  6.6796E-12  3.5182E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    8.484290 -124.114398    0.835830    0.079064   -0.529248  2457101.141658
# Heliocentric elements and errors
Epoch:              2457100.5000  =  2015/03/19
Mean Anomaly:           93.89363 +/-     0.158
Argument of Peri:       59.69953 +/-     0.139
Long of Asc Node:       68.87171 +/-     0.000
Inclination:            31.01294 +/-     0.001
Eccentricity:         0.08848975 +/-    0.0007
Semi-Major Axis:     40.46894857 +/-    0.0063
Time of Perihelion: 2432575.1648 +/-      40.9
Perihelion:          36.88786158 +/-    0.0303
Aphelion:            44.05003556 +/-    0.0306
Period (y)              257.4489 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -23.45168332 +/-    0.0005
Ecliptic Y          -33.12486484 +/-    0.0007
Ecliptic Z            5.97263924 +/-    0.0001
Ecliptic XDOT         0.00163364 +/-    0.0000
Ecliptic YDOT        -0.00167605 +/-    0.0000
Ecliptic ZDOT        -0.00127927 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.02329266 +/-    0.0006
Geocenter to KBO     40.48399856 +/-    0.0008
# Hcoef:  8.15

The following table shows the complete astrometric record for 15KO175. 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 (15KO175) followed by the observatory code and reference code for the source of the astrometry.

2015 03  19.64088  15 42 22.759  -10 58 25.60  23.5r 15KO175   568  C~2nvh      
2015 03  22.56046  15 42 15.909  -10 57 49.92  24.4r 15KO175   568  C~2nvh      
2015 03  22.62952  15 42 15.731  -10 57 49.01  24.4r 15KO175   568  C~2nvh      
2015 04  13.57241  15 41 02.727  -10 52 46.98  24.4r 15KO175   568  C~2nvh      
2015 04  13.61353  15 41 02.558  -10 52 46.43  24.2r 15KO175   568  C~2nvh      
2015 04  18.58247  15 40 41.598  -10 51 34.50  24.3r 15KO175   568  C~2nvh      
2015 04  18.59119  15 40 41.566  -10 51 34.66  24.4r 15KO175   568  C~2nvh      
2015 05  21.34311  15 38 01.766  -10 44 34.72  24.4r 15KO175   568  C~2nvh      
2015 05  21.38417  15 38 01.556  -10 44 34.37  24.3r 15KO175   568  C~2nvh      
2015 05  21.42550  15 38 01.334  -10 44 34.07  24.1r 15KO175   568  C~2nvh      
2015 05  22.50179  15 37 55.840  -10 44 23.32  24.5r 15KO175   568  C~2nvh      
2015 06  20.38172  15 35 38.668  -10 41 43.68  24.4r 15KO175   568  C~2nvh      
2015 06  20.42253  15 35 38.487  -10 41 43.62  24.2r 15KO175   568  C~2nvh      
2015 06  23.44287  15 35 26.117  -10 41 43.29  24.5r 15KO175   568  C~2nvh      
2015 07  18.38638  15 34 07.180  -10 43 52.82  24.7r 15KO175   568  C~2nvh      
2016 02  06.62912  15 46 33.118  -11 58 17.76  24.4w 15KO175   568  C~2nvh      
2016 02  12.61467  15 46 42.729  -11 58 19.15  24.9w 15KO175   568  C~2nvh      
2016 03  15.62284  15 46 33.547  -11 55 14.37  24.6w 15KO175   568  C~2nvh      
2016 04  03.53046  15 45 43.379  -11 51 34.62  24.4w 15KO175   568  C~2nvh      
2016 04  08.58000  15 45 25.266  -11 50 28.59  24.6w 15KO175   568  C~2nvh      
2016 04  29.45756  15 43 54.721  -11 45 49.66  25.1w 15KO175   568  C~2nvh      
2016 05  04.39265  15 43 30.637  -11 44 46.54  24.5w 15KO175   568  C~2nvh      
2016 05  30.46605  15 41 18.415  -11 40 17.50  24.5w 15KO175   568  C~2nvh      
2016 07  04.30222  15 38 48.223  -11 39 04.19  23.5w 15KO175   568  C~2nvh      
2016 07  05.37053  15 38 44.694  -11 39 08.62  24.2w 15KO175   568  C~2nvh      
2017 03  30.57730  15 50 03.270  -12 48 29.05  23.8w 15KO175   568  C~2nvh      
2017 08  20.25685  15 41 45.075  -12 44 23.05  24.7w 15KO175   568  C~2nvh      
2017 08  26.26800  15 41 50.872  -12 46 24.74  24.6w 15KO175   568  C~2nvh      

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     0.10
     2   0.0080   -106.34     0.03      11.82     0.01
     3   0.0082   -109.10     0.01      12.11     0.05
     4   0.0683  -1224.88    -0.08      61.22     0.10
     5   0.0684  -1227.43    -0.04      61.19     0.06
     6   0.0820  -1544.47    -0.17      60.68     0.08
     7   0.0820  -1544.89    -0.01      60.42    -0.17
     8   0.1717  -3933.38    -0.00     -71.64     0.08
     9   0.1718  -3936.47     0.05     -72.02     0.03
    10   0.1719  -3939.72    -0.03     -72.48    -0.10
    11   0.1748  -4021.01    -0.04     -80.71     0.02
    12   0.2539  -6025.88     0.12    -393.99    -0.04
    13   0.2540  -6028.49     0.02    -394.56    -0.04
    14   0.2623  -6206.05     0.13    -436.69    -0.19
    15   0.3306  -7308.34    -0.10    -834.37    -0.09
    16   0.8870   4396.48     0.09   -2670.24    -0.07
    17   0.9034   4534.32     0.05   -2640.06     0.06
    18   0.9911   4361.54    -0.00   -2490.01    -0.15
    19   1.0428   3594.30     0.01   -2440.75     0.04
    20   1.0566   3320.27     0.08   -2436.09     0.06
    21   1.1138   1961.82     0.06   -2463.80    -0.00
    22   1.1273   1602.98    -0.09   -2482.28     0.07
    23   1.1987   -349.60    -0.05   -2661.55    -0.10
    24   1.2941  -2514.41     0.02   -3096.06     0.13
    25   1.2970  -2563.85     0.02   -3112.32     0.11
    26   2.0313   8072.04    -0.04   -4925.25     0.04
    27   2.4219    908.03     0.01   -6318.60    -0.13
    28   2.4384   1018.39    -0.06   -6417.88     0.04

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.

15KO175    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        40.163    40.182    40.144
ecceobj         0.086     0.088     0.084
incobj         31.070    31.070    31.070
qmin           36.389    36.305    36.378
qmax           44.802    44.790    44.628
amean          40.425    40.418    40.387
amin           40.094    40.083    40.068
amax           40.782    40.759    40.717
emean           0.082     0.083     0.082
emin            0.069     0.069     0.069
emax            0.099     0.099     0.097
imean          29.637    29.638    29.618
imin           29.233    29.231    29.245
imax           29.984    30.031    29.996
excite_mean     0.501     0.501     0.501
fracstop        1.000     1.000     1.000
cjmean          2.752     2.752     2.752

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       172.3     172.9     173.0
kozaiamp        180.0     179.9     180.0