Orbit Fit and Astrometric record for 15DW249

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: 15DW249   
# Created Fri Mar 29 01:17:44 2024
# Orbit generated from Bernstein formalism
# Fitting     30 observations of     30
# Arc:  33.87d
# First observation: 2015/02/17
#  Last observation: 2015/03/23
Preliminary a, adot, b, bdot, g, gdot:
  -0.000001   0.037711   0.000003   0.004097   0.029273   0.000000
# Chi-squared of fit:    16.67 DOF:     54 RMS:  0.13
# Min/Max residuals:    -0.21    0.34
# Exact a, adot, b, bdot, g, gdot:
  1.814764E-05  3.226202E-02  3.381219E-06  4.280680E-03  2.843458E-02 -3.052776E-03
# Covariance matrix:
  2.0560E-13  1.4582E-10  4.0320E-14 -4.7429E-12  2.3657E-11 -6.3674E-11
  1.4582E-10  3.3378E-07  9.2635E-11 -1.1319E-08  5.1008E-08 -1.4392E-06
  4.0320E-14  9.2635E-11  1.3259E-13 -4.5023E-12  1.4139E-11 -4.0842E-10
 -4.7429E-12 -1.1319E-08 -4.5023E-12  4.1754E-10 -1.7214E-09  5.3007E-08
  2.3657E-11  5.1008E-08  1.4139E-11 -1.7214E-09  7.8357E-09 -2.0032E-07
 -6.3674E-11 -1.4392E-06 -4.0842E-10  5.3007E-08 -2.0032E-07  1.5843E-05
#      lat0       lon0       xBary       yBary       zBary        JD0
  -12.990086  155.244396    0.124980   -0.219495   -0.952304  2457070.736578
# Heliocentric elements and errors
Epoch:              2457070.5000  =  2015/02/17
Mean Anomaly:          341.82022 +/-    16.539
Argument of Peri:      329.92323 +/-    29.096
Long of Asc Node:      213.87994 +/-     0.487
Inclination:            14.68620 +/-     0.074
Eccentricity:         0.23367691 +/-    0.0920
Semi-Major Axis:     45.97509228 +/-    2.9753
Time of Perihelion: 2462820.5071 +/-    5201.1
Perihelion:          35.23177490 +/-    4.8060
Aphelion:            56.71840965 +/-    5.6011
Period (y)              311.7397 +/-     30.26
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -31.95769127 +/-    0.0969
Ecliptic Y           14.87261984 +/-    0.0447
Ecliptic Z           -7.90517425 +/-    0.0246
Ecliptic XDOT        -0.00112848 +/-    0.0003
Ecliptic YDOT        -0.00290762 +/-    0.0002
Ecliptic ZDOT         0.00046779 +/-    0.0001
# Distances at JD0 (AU)
Heliocenter to KBO   36.12451567 +/-    0.0878
Geocenter to KBO     35.16844133 +/-    0.1095
# Hcoef:  7.65

The following table shows the complete astrometric record for 15DW249. 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 (15DW249) followed by the observatory code and reference code for the source of the astrometry.

2015 02  17.23580  10 09 21.60   -02 31 03.7   23.7g 15DW249   W84  C~2iOW      
2015 02  17.30445  10 09 21.25   -02 31 01.7   23.7g 15DW249   W84  C~2iOW      
2015 02  17.35153  10 09 21.00   -02 31 00.0   23.4g 15DW249   W84  C~2iOW      
2015 02  18.07910  10 09 17.27   -02 30 38.7   23.9g 15DW249   W84  C~2iOW      
2015 02  18.14708  10 09 16.89   -02 30 36.6   23.9g 15DW249   W84  C~5hWs      
2015 02  18.21462  10 09 16.53   -02 30 34.7   23.5g 15DW249   W84  C~2iOW      
2015 02  18.21512  10 09 16.53   -02 30 34.5         15DW249   W84  C~5hWs      
2015 02  18.28477  10 09 16.18   -02 30 32.7   23.7g 15DW249   W84  C~2iOW      
2015 02  18.28527  10 09 16.16   -02 30 32.3         15DW249   W84  C~5hWs      
2015 02  18.35376  10 09 15.80   -02 30 30.4   23.9g 15DW249   W84  C~2iOW      
2015 02  18.35426  10 09 15.80   -02 30 30.1         15DW249   W84  C~5hWs      
2015 02  19.35086  10 09 10.65   -02 30 00.8         15DW249   W84  C~2iOW      
2015 02  22.06830  10 08 56.58   -02 28 36.9         15DW249   W84  C~2iOW      
2015 02  22.13567  10 08 56.25   -02 28 34.9         15DW249   W84  C~2iOW      
2015 02  22.20383  10 08 55.87   -02 28 32.6         15DW249   W84  C~2iOW      
2015 03  14.044734 10 07 16.95   -02 17 07.3   22.8i 15DW249   W84  C~4UG9      
2015 03  14.126296 10 07 16.56   -02 17 04.3   22.9r 15DW249   W84  C~4UG9      
2015 03  14.180116 10 07 16.30   -02 17 02.4   23.2g 15DW249   W84  C~4UG9      
2015 03  19.068310 10 06 54.07   -02 14 00.9         15DW249   W84  C~4UG9      
2015 03  19.072095 10 06 54.05   -02 14 01.0         15DW249   W84  C~4UG9      
2015 03  19.075914 10 06 54.02   -02 14 00.8         15DW249   W84  C~4UG9      
2015 03  19.079699 10 06 54.01   -02 14 00.6         15DW249   W84  C~4UG9      
2015 03  19.091667 10 06 53.96   -02 14 00.1         15DW249   W84  C~4UG9      
2015 03  19.097766 10 06 53.94   -02 13 59.9         15DW249   W84  C~4UG9      
2015 03  19.103889 10 06 53.90   -02 13 59.6         15DW249   W84  C~4UG9      
2015 03  19.109988 10 06 53.87   -02 13 59.4         15DW249   W84  C~4UG9      
2015 03  23.065405 10 06 36.81   -02 11 31.0         15DW249   W84  C~4UG9      
2015 03  23.080602 10 06 36.77   -02 11 30.6         15DW249   W84  C~4UG9      
2015 03  23.085556 10 06 36.73   -02 11 30.3         15DW249   W84  C~4UG9      
2015 03  23.110046 10 06 36.62   -02 11 29.6         15DW249   W84  C~4UG9      

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    -0.04       0.00    -0.21
     2   0.0002     -5.61     0.12      -0.03    -0.16
     3   0.0003     -9.72    -0.04       0.20     0.12
     4   0.0023    -69.54     0.25      -0.15     0.05
     5   0.0025    -75.61    -0.10      -0.25     0.01
     6   0.0027    -81.32    -0.12      -0.43    -0.11
     7   0.0027    -81.39    -0.15      -0.25     0.07
     8   0.0029    -86.94     0.19      -0.47    -0.09
     9   0.0029    -87.36    -0.19      -0.20     0.18
    10   0.0031    -93.08    -0.15      -0.38     0.04
    11   0.0031    -93.18    -0.21      -0.10     0.32
    12   0.0058   -175.73     0.21      -0.69    -0.17
    13   0.0132   -402.66    -0.03       1.28    -0.07
    14   0.0134   -407.99     0.34       1.36    -0.04
    15   0.0136   -414.13    -0.01       1.44    -0.01
    16   0.0679  -2044.22    -0.00     103.97     0.16
    17   0.0681  -2050.76    -0.03     104.65     0.15
    18   0.0683  -2055.08    -0.06     105.01     0.05
    19   0.0817  -2431.42     0.03     153.61     0.08
    20   0.0817  -2431.66     0.08     153.41    -0.16
    21   0.0817  -2432.15    -0.12     153.43    -0.18
    22   0.0817  -2432.37    -0.04     153.56    -0.08
    23   0.0817  -2433.25    -0.01     153.76    -0.01
    24   0.0818  -2433.60     0.11     153.83     0.00
    25   0.0818  -2434.27    -0.09     153.90     0.00
    26   0.0818  -2434.76    -0.11     153.92    -0.04
    27   0.0926  -2726.89    -0.12     199.69     0.09
    28   0.0927  -2727.59     0.29     199.85     0.07
    29   0.0927  -2728.26    -0.01     199.91     0.08
    30   0.0927  -2730.05     0.00     199.97    -0.16

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.

15DW249    quality flag:0

Type:      ERR2LARGE ERR2LARGE ERR2LARGE

axisobj         0.000     0.000     0.000
ecceobj        -1.000    -1.000    -1.000
incobj         -1.000    -1.000    -1.000
qmin            0.000     0.000     0.000
qmax            0.000     0.000     0.000
amean           0.000     0.000     0.000
amin            0.000     0.000     0.000
amax            0.000     0.000     0.000
emean           0.000     0.000     0.000
emin            0.000     0.000     0.000
emax            0.000     0.000     0.000
imean           0.000     0.000     0.000
imin            0.000     0.000     0.000
imax            0.000     0.000     0.000
excite_mean     0.000     0.000     0.000
fracstop        0.000     0.000     0.000
cjmean          0.000     0.000     0.000

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         0.0       0.0       0.0
kozaiamp          0.0       0.0       0.0