Orbit Fit and Astrometric record for 15KJ174

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: 15KJ174   
# Created Fri Dec  3 02:13:22 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     28 observations of     28
# Arc:   6.21y
# First observation: 2015/02/25
#  Last observation: 2021/05/12
# Chi-squared of fit:     7.18 DOF:     50 RMS:  0.09
# Min/Max residuals:    -0.25    0.17
# Exact a, adot, b, bdot, g, gdot:
  1.590322E-05  2.323376E-02  1.659982E-06  3.274042E-03  2.408424E-02  2.821601E-03
# Covariance matrix:
  2.1449E-13 -7.7810E-14 -5.8180E-16 -9.9816E-15  9.9748E-14 -4.3618E-13
 -7.7810E-14  1.5841E-13 -1.6811E-14  2.5330E-14  4.5633E-14  1.1519E-12
 -5.8180E-16 -1.6811E-14  8.5520E-14 -2.9146E-14 -1.2855E-14 -1.4140E-13
 -9.9816E-15  2.5330E-14 -2.9146E-14  2.6191E-14  8.0164E-15  2.1312E-13
  9.9748E-14  4.5633E-14 -1.2855E-14  8.0164E-15  1.3753E-13  3.8313E-13
 -4.3618E-13  1.1519E-12 -1.4140E-13  2.1312E-13  3.8313E-13  9.6922E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
    6.756890 -123.599798    0.971805    0.020342   -0.170613  2457079.117438
# Heliocentric elements and errors
Epoch:              2457078.5000  =  2015/02/25
Mean Anomaly:           74.13688 +/-     0.027
Argument of Peri:      314.25690 +/-     0.027
Long of Asc Node:      195.75895 +/-     0.001
Inclination:            10.55068 +/-     0.000
Eccentricity:         0.10034437 +/-    0.0001
Semi-Major Axis:     42.45880354 +/-    0.0032
Time of Perihelion: 2436268.0317 +/-       7.9
Perihelion:          38.19830173 +/-    0.0064
Aphelion:            46.71930536 +/-    0.0067
Period (y)              276.6686 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -23.72463175 +/-    0.0004
Ecliptic Y          -33.94866288 +/-    0.0005
Ecliptic Z            4.88530372 +/-    0.0001
Ecliptic XDOT         0.00204427 +/-    0.0000
Ecliptic YDOT        -0.00169605 +/-    0.0000
Ecliptic ZDOT         0.00040743 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.70408569 +/-    0.0005
Geocenter to KBO     41.52086301 +/-    0.0006
# Hcoef:  7.84

The following table shows the complete astrometric record for 15KJ174. 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 (15KJ174) followed by the observatory code and reference code for the source of the astrometry.

2015 02  25.61666  15 42 48.657  -12 46 18.49  24.4r 15KJ174   568  C~2lVJ      
2015 03  22.53917  15 42 22.179  -12 40 00.10  23.9r 15KJ174   568  C~2lVJ      
2015 04  13.55184  15 41 15.405  -12 32 45.82        15KJ174   568  C~2lVJ      
2015 05  21.32236  15 38 26.050  -12 20 03.34  23.7r 15KJ174   568  C~2lVJ      
2015 05  21.36353  15 38 25.853  -12 20 02.82  24.2r 15KJ174   568  C~2lVJ      
2015 05  21.40471  15 38 25.654  -12 20 01.89  24.0r 15KJ174   568  C~2lVJ      
2015 05  22.48134  15 38 20.499  -12 19 42.66  24.1r 15KJ174   568  C~2lVJ      
2015 05  25.47177  15 38 06.223  -12 18 50.39  24.2r 15KJ174   568  C~2lVJ      
2015 06  20.36123  15 36 12.051  -12 12 53.67  24.1r 15KJ174   568  C~2lVJ      
2015 06  20.40209  15 36 11.890  -12 12 53.29  23.8r 15KJ174   568  C~2lVJ      
2015 06  23.42230  15 36 00.390  -12 12 24.92  23.9r 15KJ174   568  C~2lVJ      
2015 07  11.29546  15 35 04.157  -12 10 42.67  24.1r 15KJ174   568  C~2lVJ      
2015 07  18.36550  15 34 48.359  -12 10 34.74  24.1r 15KJ174   568  C~2lVJ      
2016 02  06.63317  15 47 54.516  -12 55 52.92  23.9w 15KJ174   568  C~2lVJ      
2016 02  12.61871  15 48 05.649  -12 55 15.82  23.8w 15KJ174   568  C~2lVJ      
2016 03  15.62688  15 48 05.472  -12 48 44.82  24.3w 15KJ174   568  C~2lVJ      
2016 04  03.55069  15 47 21.160  -12 42 59.68  24.2w 15KJ174   568  C~2lVJ      
2016 04  08.60024  15 47 04.672  -12 41 19.22  24.2w 15KJ174   568  C~2lVJ      
2016 04  29.50143  15 45 40.846  -12 34 12.35  24.4w 15KJ174   568  C~2lVJ      
2016 05  04.47406  15 45 18.210  -12 32 32.35  24.3w 15KJ174   568  C~2lVJ      
2016 05  30.45796  15 43 14.783  -12 24 44.59  24.1w 15KJ174   568  C~2lVJ      
2016 07  04.31032  15 40 54.517  -12 18 41.96  24.4w 15KJ174   568  C~2lVJ      
2016 07  05.38268  15 40 51.261  -12 18 37.24  23.8w 15KJ174   568  C~2lVJ      
2017 03  30.57730  15 53 05.586  -12 50 57.13  24.9w 15KJ174   568  C~2lVJ      
2017 08  20.25685  15 45 27.387  -12 28 45.12  24.2w 15KJ174   568  C~2lVJ      
2017 08  26.26800  15 45 34.030  -12 30 00.38  24.1w 15KJ174   568  C~2lVJ      
2021 05  12.400240 16 12 23.556  -12 59 48.87  24.5G 15KJ174   G37  C~4pVr      
2021 05  12.431840 16 12 23.425  -12 59 48.76        15KJ174   G37  C~4pVr      

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    -0.11       0.00     0.13
     2   0.0682      0.00    -0.04       0.00    -0.05
     3   0.1285      0.00     0.10       0.00     0.01
     4   0.2319      0.00    -0.15       0.00     0.03
     5   0.2320      0.00    -0.09       0.00    -0.19
     6   0.2321      0.00    -0.07       0.00     0.00
     7   0.2351      0.00     0.07       0.00    -0.02
     8   0.2433      0.00    -0.03       0.00     0.02
     9   0.3142      0.00     0.02       0.00     0.04
    10   0.3143      0.00     0.04       0.00     0.01
    11   0.3225      0.00    -0.01       0.00     0.00
    12   0.3715      0.00    -0.01       0.00     0.05
    13   0.3908      0.00     0.11       0.00    -0.01
    14   0.9473      0.00     0.14       0.00    -0.09
    15   0.9637      0.00     0.17       0.00    -0.01
    16   1.0514      0.00    -0.04       0.00     0.11
    17   1.1032      0.00    -0.05       0.00    -0.07
    18   1.1170      0.00     0.04       0.00    -0.05
    19   1.1742      0.00    -0.02       0.00    -0.08
    20   1.1878      0.00    -0.03       0.00    -0.01
    21   1.2590      0.00    -0.02       0.00     0.02
    22   1.3544      0.00    -0.03       0.00     0.04
    23   1.3573      0.00     0.09       0.00    -0.05
    24   2.0916      0.00    -0.12       0.00    -0.02
    25   2.4822      0.00    -0.05       0.00     0.17
    26   2.4987      0.00    -0.00       0.00     0.15
    27   6.2089      0.00    -0.14       0.00     0.17
    28   6.2089      0.00     0.14       0.00    -0.25

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.

15KJ174    quality flag:2

Type:       SCATNEAR  SCATNEAR CLASSICAL

axisobj        42.118    42.118    42.118
ecceobj         0.095     0.095     0.095
incobj         10.595    10.595    10.595
qmin           36.136    35.661    36.810
qmax           48.894    49.507    48.152
amean          42.328    42.328    42.331
amin           41.879    41.895    41.936
amax           42.790    42.810    42.763
emean           0.093     0.099     0.033
emin            0.034     0.049     0.004
emax            0.145     0.156     0.128
imean          11.118    11.038    12.142
imin            9.556     9.839     9.843
imax           12.272    12.293    13.103
excite_mean     0.215     0.217     0.215
fracstop        1.000     1.000     1.000
cjmean          3.027     3.027     3.027

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       269.1     271.6     200.6
kozaiamp         70.7      65.1     180.0