Orbit Fit and Astrometric record for 15DB250

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: 15DB250   
# Created Tue Dec  7 02:13:19 2021
# Orbit generated from Bernstein formalism
# Fitting     16 observations of     17
# Arc:   1.99y
# First observation: 2013/03/16
#  Last observation: 2015/03/14
Preliminary a, adot, b, bdot, g, gdot:
   0.000000   0.030521  -0.000000  -0.004518   0.027547   0.000000
# Chi-squared of fit:     8.03 DOF:     26 RMS:  0.13
# Min/Max residuals:    -0.25    0.29
# Exact a, adot, b, bdot, g, gdot:
  1.760919E-05  3.048723E-02 -2.563870E-06 -4.508925E-03  2.743714E-02  1.955505E-05
# Covariance matrix:
  5.0108E-13  9.2076E-12  1.2778E-15 -1.3653E-12  6.6941E-12  1.5483E-10
  9.2076E-12  7.6560E-09  1.0352E-12 -1.1057E-09  5.4485E-09  1.2539E-07
  1.2778E-15  1.0352E-12  4.8925E-13 -4.0060E-13  7.3688E-13  1.6955E-11
 -1.3653E-12 -1.1057E-09 -4.0060E-13  1.5984E-10 -7.8698E-10 -1.8110E-08
  6.6941E-12  5.4485E-09  7.3688E-13 -7.8698E-10  3.8826E-09  8.9253E-08
  1.5483E-10  1.2539E-07  1.6955E-11 -1.8110E-08  8.9253E-08  2.0538E-06
#      lat0       lon0       xBary       yBary       zBary        JD0
   -6.521789  158.131149   -0.298711   -0.107766   -0.943409  2456367.566228
# Heliocentric elements and errors
Epoch:              2456360.5000  =  2013/03/09
Mean Anomaly:            2.27723 +/-    10.659
Argument of Peri:      214.02353 +/-    16.245
Long of Asc Node:      301.53739 +/-     0.036
Inclination:            10.47490 +/-     0.008
Eccentricity:         0.19658315 +/-    0.0014
Semi-Major Axis:     46.52684037 +/-    0.1579
Time of Perihelion: 2455627.2391 +/-    3432.3
Perihelion:          37.38044740 +/-    0.1422
Aphelion:            55.67323335 +/-    0.1996
Period (y)              317.3683 +/-      1.62
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -34.59717673 +/-    0.0763
Ecliptic Y           13.56642575 +/-    0.0306
Ecliptic Z           -4.13980783 +/-    0.0094
Ecliptic XDOT        -0.00109381 +/-    0.0001
Ecliptic YDOT        -0.00284100 +/-    0.0001
Ecliptic ZDOT        -0.00044710 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   37.39185144 +/-    0.0715
Geocenter to KBO     36.44694224 +/-    0.0828
# Hcoef:  7.52

The following table shows the complete astrometric record for 15DB250. 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 (15DB250) followed by the observatory code and reference code for the source of the astrometry.

2013 03  16.06545  10 29 24.44   +02 27 51.7   23.4r 15DB250   W84  C~4UG9      
2013 03  16.13824  10 29 24.09   +02 27 53.8         15DB250   W84  C~4UG9      
2013 03  16.20675  10 29 23.76   +02 27 55.8         15DB250   W84  C~4UG9      
2015 02  17.25482  10 43 55.20   +00 28 43.6   23.8g 15DB250   W84  C~2iOX      
2015 02  17.32377  10 43 54.84   +00 28 45.2   23.6g 15DB250   W84  C~2iOX      
2015 02  17.37067  10 43 54.60   +00 28 46.2   23.7g 15DB250   W84  C~2iOX      
2015 02  18.16530  10 43 50.69   +00 29 05.9   23.6g 15DB250   W84  C~2iOX      
2015 02  18.30398  10 43 49.98   +00 29 09.5   23.9g 15DB250   W84  C~2iOX      
2015 02  22.08708  10 43 31.09   +00 30 45.5         15DB250   W84  C~2iOX      
2015 02  22.15439  10 43 30.73   +00 30 47.1         15DB250   W84  C~2iOX      
2015 02  22.22300  10 43 30.38   +00 30 49.1         15DB250   W84  C~2iOX      
2015 02  22.36038  10 43 29.73   +00 30 52.5         15DB250   W84  C~2iOX      
2015 02  24.20076  10 43 20.41   +00 31 41.1         15DB250   W84  C~2iOX      
2015 02  27.19913  10 43 05.25   +00 33 02.0         15DB250   W84  C~2iOX      
2015 03  14.064225 10 41 50.74   +00 40 09.4   22.9i 15DB250   W84  C~4UG9      
2015 03  14.141146 10 41 50.36   +00 40 11.6   22.8r 15DB250   W84  C~4UG9      
2015 03  14.199398 10 41 50.06   +00 40 12.9   23.3g 15DB250   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    -0.01       0.00    -0.01
     2   0.0002     -5.65     0.01       0.01    -0.01
     3   0.0004    -10.98     0.00       0.04     0.02
     4   1.9252  14801.16     0.04   -1806.38     0.15
     5   1.9254  14795.52    -0.12   -1806.90    -0.01
     6   1.9255  14791.79    -0.13   -1807.31    -0.17
     7   1.9277  14729.70     0.02   -1810.76     0.03
     8   1.9281  14718.42    -0.17   -1811.37     0.13
     9   1.9385  14418.19     0.20   -1827.28     0.04
    10   1.9386  14412.55     0.02   -1827.80    -0.20
    11   1.9388  14406.91    -0.04   -1827.89     0.00
    12   1.9392  14396.54 (   0.75)  -1828.35 (   0.12)
    13   1.9442  14247.98     0.04   -1835.05    -0.09
    14   1.9525  14005.66     0.29   -1844.22    -0.11
    15   1.9932  12804.17    -0.09   -1861.53     0.27
    16   1.9934  12798.04    -0.04   -1861.59     0.20
    17   1.9935  12793.36    -0.02   -1862.06    -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.

15DB250    quality flag:2

Type:       SCATEXTD  SCATNEAR  SCATEXTD

axisobj        46.347    47.387    46.289
ecceobj         0.193     0.253     0.192
incobj         10.487    10.513    10.487
qmin           36.496    33.734    36.563
qmax           56.729    63.420    56.577
amean          46.451    47.737    46.373
amin           46.040    46.903    45.978
amax           46.943    48.854    46.858
emean           0.195     0.258     0.194
emin            0.181     0.204     0.179
emax            0.210     0.299     0.208
imean          11.874    11.800    11.878
imin           11.158    10.251    11.165
imax           12.523    13.456    12.526
excite_mean     0.284     0.329     0.283
fracstop        1.000     1.000     1.000
cjmean          3.032     3.012     3.032

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       180.8     177.4     180.8
kozaiamp        180.0     180.0     180.0