Orbit Fit and Astrometric record for 15DJ249

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: 15DJ249   
# Created Mon Dec  6 02:13:13 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     58 observations of     58
# Arc:  15.99y
# First observation: 2002/02/13
#  Last observation: 2018/02/08
# Chi-squared of fit:    63.38 DOF:    110 RMS:  0.18
# Min/Max residuals:    -0.50    0.41
# Exact a, adot, b, bdot, g, gdot:
  1.723627E-05  2.756115E-02 -5.040357E-07  2.926916E-04  2.535591E-02 -2.283350E-03
# Covariance matrix:
  3.2438E-13 -6.8373E-14  3.2774E-15 -5.9746E-16 -5.2102E-14 -1.0927E-13
 -6.8373E-14  2.5419E-14 -1.4102E-15  2.7955E-16  2.2018E-14  5.0422E-14
  3.2774E-15 -1.4102E-15  2.1068E-13 -1.6106E-14 -4.5201E-15 -2.6854E-15
 -5.9746E-16  2.7955E-16 -1.6106E-14  1.3798E-15  9.7875E-17  5.9957E-16
 -5.2102E-14  2.2018E-14 -4.5201E-15  9.7875E-17  8.4794E-14  4.0732E-14
 -1.0927E-13  5.0422E-14 -2.6854E-15  5.9957E-16  4.0732E-14  1.0620E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
  -13.073592  133.282266   -0.193968   -0.218562   -0.940817  2452318.754200
# Heliocentric elements and errors
Epoch:              2452318.5000  =  2002/02/13
Mean Anomaly:          345.81256 +/-     0.003
Argument of Peri:      296.44937 +/-     0.004
Long of Asc Node:      220.30294 +/-     0.000
Inclination:            12.78239 +/-     0.000
Eccentricity:         0.23420667 +/-    0.0000
Semi-Major Axis:     51.91997999 +/-    0.0031
Time of Perihelion: 2457703.6987 +/-      11.7
Perihelion:          39.75997424 +/-    0.0030
Aphelion:            64.07998573 +/-    0.0042
Period (y)              374.1192 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -27.14067248 +/-    0.0003
Ecliptic Y           28.54174813 +/-    0.0003
Ecliptic Z           -8.92110126 +/-    0.0001
Ecliptic XDOT        -0.00201520 +/-    0.0000
Ecliptic YDOT        -0.00221069 +/-    0.0000
Ecliptic ZDOT         0.00008677 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   40.38363164 +/-    0.0003
Geocenter to KBO     39.43863201 +/-    0.0005
# Hcoef:  6.62

The following table shows the complete astrometric record for 15DJ249. 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 (15DJ249) followed by the observatory code and reference code for the source of the astrometry.

2002 02  13.253457 08 48 10.27   +04 16 27.9   22.5r 15DJ249   645  C~444E      
2002 02  13.254287 08 48 10.28   +04 16 27.8   22.1i 15DJ249   645  C~444E      
2002 02  13.255945 08 48 10.24   +04 16 27.8   21.6z 15DJ249   645  C~444E      
2002 02  13.256775 08 48 10.27   +04 16 27.8   23.5g 15DJ249   645  C~444E      
2006 11  18.449231 09 23 34.50   +02 03 02.4   22.5r 15DJ249   645  C~444E      
2006 11  18.450060 09 23 34.49   +02 03 02.4   22.0i 15DJ249   645  C~444E      
2006 11  18.452548 09 23 34.48   +02 03 02.1         15DJ249   645  C~444E      
2007 03  14.228430 09 16 55.61   +02 21 33.7   22.2r 15DJ249   645  C~444E      
2007 03  14.229259 09 16 55.60   +02 21 33.6   22.0i 15DJ249   645  C~444E      
2007 03  14.230918 09 16 55.59   +02 21 33.6   21.3z 15DJ249   645  C~444E      
2007 03  14.231747 09 16 55.59   +02 21 33.4   23.6g 15DJ249   645  C~444E      
2015 02  17.15003  10 08 42.59   -01 23 14.5   23.5g 15DJ249   W84  C~2iOW      
2015 02  17.23580  10 08 42.19   -01 23 12.2   23.3g 15DJ249   W84  C~2iOW      
2015 02  17.30445  10 08 41.86   -01 23 10.5   23.4g 15DJ249   W84  C~2iOW      
2015 02  17.35153  10 08 41.64   -01 23 09.2   23.7g 15DJ249   W84  C~2iOW      
2015 02  18.07910  10 08 38.20   -01 22 49.9   23.1g 15DJ249   W84  C~2iOW      
2015 02  18.14658  10 08 37.86   -01 22 47.9   23.4g 15DJ249   W84  C~2iOW      
2015 02  18.21462  10 08 37.55   -01 22 46.2   23.4g 15DJ249   W84  C~2iOW      
2015 02  18.28477  10 08 37.20   -01 22 44.2         15DJ249   W84  C~2iOW      
2015 02  18.35376  10 08 36.89   -01 22 42.6   23.6g 15DJ249   W84  C~2iOW      
2015 02  19.07585  10 08 33.47   -01 22 23.3         15DJ249   W84  C~2iOW      
2015 02  19.07635  10 08 33.46   -01 22 22.7   23.7g 15DJ249   W84  C~2y2b      
2015 02  19.14370  10 08 33.15   -01 22 20.7         15DJ249   W84  C~2y2b      
2015 02  19.21297  10 08 32.80   -01 22 19.3   23.6g 15DJ249   W84  C~2iOW      
2015 02  19.21347  10 08 32.79   -01 22 18.9         15DJ249   W84  C~2y2b      
2015 02  19.28175  10 08 32.47   -01 22 17.6   23.5g 15DJ249   W84  C~2iOW      
2015 02  19.28225  10 08 32.47   -01 22 17.0         15DJ249   W84  C~2y2b      
2015 02  19.35086  10 08 32.13   -01 22 15.9         15DJ249   W84  C~2iOW      
2015 02  22.06830  10 08 19.28   -01 21 00.7         15DJ249   W84  C~2iOW      
2015 02  22.13567  10 08 18.94   -01 20 58.7         15DJ249   W84  C~2iOW      
2015 02  22.27270  10 08 18.30   -01 20 55.0         15DJ249   W84  C~2iOW      
2015 02  22.34137  10 08 17.95   -01 20 53.0         15DJ249   W84  C~2iOW      
2015 02  24.053484 10 08 09.86   -01 20 03.9   22.6r 15DJ249   W84  C~444E      
2015 02  27.054086 10 07 55.72   -01 18 36.6         15DJ249   W84  C~444E      
2015 03  08.239514 10 07 13.49   -01 13 55.4   22.3r 15DJ249   W84  C~444E      
2015 03  19.006331 10 06 27.34   -01 08 07.3   21.9i 15DJ249   W84  C~444E      
2015 03  23.115706 10 06 11.10   -01 05 52.3   23.3g 15DJ249   W84  C~444E      
2015 04  09.064334 10 05 14.92   -00 56 46.5   21.9z 15DJ249   W84  C~444E      
2015 05  17.001845 10 04 32.66   -00 40 58.8   22.7r 15DJ249   309  C~444E      
2015 05  17.005829 10 04 32.67   -00 40 58.9   22.6r 15DJ249   309  C~444E      
2015 05  17.009829 10 04 32.65   -00 40 58.8   22.3r 15DJ249   309  C~444E      
2015 05  17.013814 10 04 32.68   -00 40 58.8   22.5r 15DJ249   309  C~444E      
2015 05  17.054774 10 04 32.68   -00 40 57.7         15DJ249   309  C~444E      
2015 05  17.058759 10 04 32.66   -00 40 57.9         15DJ249   309  C~444E      
2015 05  17.062744 10 04 32.69   -00 40 57.8   23.5g 15DJ249   309  C~444E      
2015 05  17.066729 10 04 32.70   -00 40 58.0         15DJ249   309  C~444E      
2015 05  18.015311 10 04 33.34   -00 40 42.0   23.7g 15DJ249   309  C~444E      
2015 05  18.019294 10 04 33.35   -00 40 41.7   23.7g 15DJ249   309  C~444E      
2015 05  18.023276 10 04 33.34   -00 40 41.9         15DJ249   309  C~444E      
2015 05  18.027261 10 04 33.34   -00 40 41.8         15DJ249   309  C~444E      
2016 01  16.288125 10 17 18.43   -01 59 52.4   22.4r 15DJ249   W84  C~444E      
2016 01  16.289115 10 17 18.45   -01 59 52.2   22.7g 15DJ249   W84  C~444E      
2016 02  28.278715 10 14 09.40   -01 44 59.8   21.9z 15DJ249   W84  C~444E      
2016 12  29.322633 10 24 23.19   -02 27 20.4   23.4g 15DJ249   W84  C~444E      
2017 03  04.124485 10 20 06.40   -02 09 29.9   23.3g 15DJ249   W84  C~444E      
2017 03  30.993113 10 18 14.21   -01 54 50.1   21.8z 15DJ249   W84  C~444E      
2018 02  07.382604 10 28 20.97   -02 47 20.7   21.7z 15DJ249   W84  C~444E      
2018 02  08.329473 10 28 16.74   -02 47 00.2   21.7z 15DJ249   W84  C~444E      

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     0.03       0.00     0.14
     2   0.0000      0.00     0.24       0.00     0.02
     3   0.0000      0.00    -0.24       0.00    -0.02
     4   0.0000      0.00     0.27       0.00    -0.04
     5   4.7617      0.00     0.03       0.00     0.17
     6   4.7617      0.00    -0.12       0.00     0.19
     7   4.7617      0.00    -0.27       0.00    -0.06
     8   5.0786      0.00     0.02       0.00     0.13
     9   5.0786      0.00    -0.09       0.00     0.01
    10   5.0787      0.00    -0.14       0.00    -0.04
    11   5.0787      0.00    -0.10       0.00    -0.27
    12  13.0100      0.00    -0.08       0.00    -0.20
    13  13.0102      0.00     0.12       0.00    -0.15
    14  13.0104      0.00     0.13       0.00    -0.26
    15  13.0105      0.00     0.23       0.00    -0.21
    16  13.0125      0.00     0.11       0.00    -0.20
    17  13.0127      0.00    -0.12       0.00    -0.00
    18  13.0129      0.00     0.15       0.00    -0.12
    19  13.0131      0.00    -0.02       0.00     0.01
    20  13.0133      0.00     0.31       0.00    -0.24
    21  13.0153      0.00     0.12       0.00    -0.36
    22  13.0153      0.00     0.01       0.00     0.22
    23  13.0154      0.00     0.22       0.00     0.40
    24  13.0156      0.00    -0.01       0.00    -0.07
    25  13.0156      0.00    -0.13       0.00     0.31
    26  13.0158      0.00     0.01       0.00    -0.24
    27  13.0158      0.00     0.05       0.00     0.35
    28  13.0160      0.00    -0.10       0.00    -0.41
    29  13.0234      0.00     0.26       0.00    -0.23
    30  13.0236      0.00     0.02       0.00    -0.12
    31  13.0240      0.00     0.32       0.00    -0.27
    32  13.0242      0.00     0.02       0.00    -0.20
    33  13.0289      0.00    -0.10       0.00     0.22
    34  13.0371      0.00    -0.26       0.00     0.07
    35  13.0622      0.00    -0.02       0.00    -0.39
    36  13.0917      0.00    -0.29       0.00     0.01
    37  13.1030      0.00    -0.05       0.00     0.18
    38  13.1494      0.00    -0.10       0.00     0.41
    39  13.2532      0.00    -0.04       0.00     0.12
    40  13.2533      0.00     0.08       0.00    -0.05
    41  13.2533      0.00    -0.25       0.00    -0.02
    42  13.2533      0.00     0.17       0.00    -0.09
    43  13.2534      0.00    -0.16       0.00     0.32
    44  13.2534      0.00    -0.50       0.00     0.05
    45  13.2534      0.00    -0.08       0.00     0.08
    46  13.2534      0.00     0.04       0.00    -0.19
    47  13.2560      0.00     0.14       0.00    -0.05
    48  13.2560      0.00     0.25       0.00     0.19
    49  13.2560      0.00     0.06       0.00    -0.08
    50  13.2561      0.00     0.03       0.00    -0.04
    51  13.9221      0.00    -0.14       0.00     0.11
    52  13.9221      0.00     0.21       0.00     0.30
    53  14.0398      0.00    -0.01       0.00     0.23
    54  14.8749      0.00    -0.06       0.00     0.04
    55  15.0524      0.00    -0.17       0.00     0.18
    56  15.1259      0.00    -0.00       0.00     0.00
    57  15.9839      0.00    -0.15       0.00     0.10
    58  15.9865      0.00    -0.19       0.00     0.24

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.

15DJ249    quality flag:2

Type:       SCATNEAR  SCATNEAR  SCATEXTD

axisobj        51.484    51.484    51.484
ecceobj         0.228     0.228     0.228
incobj         12.783    12.783    12.783
qmin           39.129    39.123    39.136
qmax           64.345    64.456    64.450
amean          51.527    51.527    51.527
amin           51.060    51.062    51.061
amax           52.104    52.113    52.087
emean           0.225     0.225     0.225
emin            0.213     0.213     0.213
emax            0.238     0.238     0.238
imean          13.752    13.752    13.752
imin           13.332    13.333    13.332
imax           14.126    14.119    14.123
excite_mean     0.327     0.327     0.327
fracstop        1.000     1.000     1.000
cjmean          3.060     3.060     3.060

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       174.4     174.4     174.4
kozaiamp        180.0     180.0     180.0