Orbit Fit and Astrometric record for 15DM319

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: 15DM319   
# Created Tue Apr  1 01:10:21 2025
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     18 observations of     18
# Arc:   5.91y
# First observation: 2011/08/01
#  Last observation: 2017/06/28
# Chi-squared of fit:     9.04 DOF:     30 RMS:  0.13
# Min/Max residuals:    -0.22    0.22
# Exact a, adot, b, bdot, g, gdot:
  2.011083E-05  3.274247E-02  5.910757E-07  1.789247E-03  2.467884E-02  4.728251E-03
# Covariance matrix:
  7.2663E-13 -3.3418E-13  1.0305E-14 -1.1401E-14 -8.4314E-14 -1.1046E-12
 -3.3418E-13  3.5501E-13 -1.1901E-14  1.8917E-14 -4.0477E-14  1.6302E-12
  1.0305E-14 -1.1901E-14  5.5507E-13 -1.3402E-13 -5.2452E-15 -6.5622E-14
 -1.1401E-14  1.8917E-14 -1.3402E-13  3.8724E-14 -3.7972E-15  9.6233E-14
 -8.4314E-14 -4.0477E-14 -5.2452E-15 -3.7972E-15  2.7305E-13 -2.9553E-14
 -1.1046E-12  1.6302E-12 -6.5622E-14  9.6233E-14 -2.9553E-14  8.4908E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
    6.179943 -131.503892   -0.997217    0.019212   -0.177990  2455774.744719
# Heliocentric elements and errors
Epoch:              2455774.5000  =  2011/08/01
Mean Anomaly:            0.84506 +/-     0.002
Argument of Peri:       43.28697 +/-     0.010
Long of Asc Node:      165.98722 +/-     0.003
Inclination:             6.84224 +/-     0.000
Eccentricity:         0.85670816 +/-    0.0002
Semi-Major Axis:    275.54799564 +/-    0.3186
Time of Perihelion: 2451852.7455 +/-       9.7
Perihelion:          39.48378054 +/-    0.0646
Aphelion:           511.61221074 +/-    0.5933
Period (y)             4574.0835 +/-      7.93
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -26.06314894 +/-    0.0006
Ecliptic Y          -30.96480700 +/-    0.0006
Ecliptic Z            4.36216463 +/-    0.0001
Ecliptic XDOT         0.00238605 +/-    0.0000
Ecliptic YDOT        -0.00277610 +/-    0.0000
Ecliptic ZDOT         0.00025387 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   40.70778646 +/-    0.0006
Geocenter to KBO     40.52046846 +/-    0.0009
# Hcoef:  8.69

The following table shows the complete astrometric record for 15DM319. 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 (15DM319) followed by the observatory code and reference code for the source of the astrometry.

2011 08  01.243953 15 11 06.00   -11 23 05.9   24.8r 15DM319   T14  C~7X9K      
2011 08  01.275567 15 11 05.98   -11 23 06.1         15DM319   T14  C~7X9K      
2014 06  22.329301 15 34 37.81   -12 31 46.8         15DM319   T14  C~7X9K      
2014 06  22.372229 15 34 37.65   -12 31 46.4         15DM319   T14  C~7X9K      
2015 02  25.630100 15 48 08.32   -13 21 19.9         15DM319   T14  C~7X9K      
2015 03  22.543249 15 47 51.60   -13 16 15.9         15DM319   T14  C~7X9K      
2015 04  18.560459 15 46 34.82   -13 08 37.5         15DM319   T14  C~7X9K      
2015 05  21.326470 15 44 14.62   -12 59 08.7   24.9r 15DM319   T14  C~7X9K      
2015 05  21.367719 15 44 14.43   -12 59 08.0         15DM319   T14  C~7X9K      
2015 05  21.408941 15 44 14.24   -12 59 07.7         15DM319   T14  C~7X9K      
2015 05  22.485414 15 44 09.33   -12 58 51.1         15DM319   T14  C~7X9K      
2015 05  25.475993 15 43 55.82   -12 58 06.1         15DM319   T14  C~7X9K      
2015 06  20.365304 15 42 07.16   -12 53 06.0         15DM319   T14  C~7X9K      
2015 06  20.406170 15 42 07.01   -12 53 05.8         15DM319   T14  C~7X9K      
2015 06  23.426435 15 41 56.06   -12 52 43.0         15DM319   T14  C~7X9K      
2016 04  08.628567 15 54 21.81   -13 30 41.1         15DM319   T14  C~7X9K      
2017 06  28.263520 15 56 05.62   -13 31 10.7         15DM319   T14  C~7X9K      
2017 06  28.274291 15 56 05.58   -13 31 10.6   24.8r 15DM319   T14  C~7X9K      

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     0.21       0.00     0.06
     2   0.0001      0.00    -0.11       0.00     0.14
     3   2.8914      0.00    -0.12       0.00    -0.08
     4   2.8915      0.00    -0.22       0.00    -0.00
     5   3.5712      0.00     0.16       0.00    -0.02
     6   3.6394      0.00    -0.05       0.00    -0.09
     7   3.7134      0.00    -0.12       0.00    -0.01
     8   3.8031      0.00     0.06       0.00     0.11
     9   3.8032      0.00     0.07       0.00     0.17
    10   3.8033      0.00     0.08       0.00    -0.16
    11   3.8063      0.00    -0.17       0.00    -0.15
    12   3.8145      0.00     0.22       0.00    -0.07
    13   3.8853      0.00     0.03       0.00    -0.09
    14   3.8855      0.00     0.10       0.00    -0.22
    15   3.8937      0.00    -0.04       0.00    -0.01
    16   4.6883      0.00    -0.14       0.00     0.15
    17   5.9083      0.00     0.03       0.00     0.13
    18   5.9084      0.00    -0.00       0.00     0.17

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.

15DM319    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj       269.536   269.535   269.536
ecceobj         0.854     0.854     0.854
incobj          6.847     6.847     6.847
qmin           36.726    36.663    36.757
qmax          578.064   608.638   603.676
amean         280.479   290.389   284.910
amin          262.158   269.535   269.009
amax          308.750   324.051   321.573
emean           0.859     0.864     0.861
emin            0.846     0.851     0.850
emax            0.872     0.878     0.877
imean           5.926     6.056     5.935
imin            5.682     5.837     5.700
imax            6.321     6.321     6.321
excite_mean     0.865     0.870     0.868
fracstop        1.000     1.000     1.000
cjmean          3.214     3.214     3.214

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        62.8      55.3      62.0
kozaiamp         18.2      13.3      19.4