Orbit Fit and Astrometric record for 15DH249

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: 15DH249   
# Created Fri Nov  1 01:10:01 2024
# Orbit generated from Bernstein formalism
# Fitting     10 observations of     10
# Arc:   2.13d
# First observation: 2015/02/17
#  Last observation: 2015/02/19
# WARNING Fitting with energy constraint
# WARNING and with gdot fixed = 0
# Chi-squared of fit:     9.68 DOF:     16 RMS:  0.17
# Min/Max residuals:    -0.30    0.42
# Exact a, adot, b, bdot, g, gdot:
  1.398121E-05  2.013712E-02  4.913881E-06  4.852981E-03  2.216620E-02  0.000000E+00
# Covariance matrix:
  2.8762E-11  3.9651E-08  1.2859E-12  1.5048E-09  6.3123E-09  0.0000E+00
  3.9651E-08  5.5495E-05  1.7953E-09  2.1008E-06  8.8127E-06  0.0000E+00
  1.2859E-12  1.7953E-09  3.6580E-13 -6.0778E-12  2.8527E-10  0.0000E+00
  1.5048E-09  2.1008E-06 -6.0778E-12  1.1371E-07  3.3383E-07  0.0000E+00
  6.3123E-09  8.8127E-06  2.8527E-10  3.3383E-07  1.4003E-06  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  1.4332E-04
#      lat0       lon0       xBary       yBary       zBary        JD0
  -16.199718  156.099546    0.141091   -0.271846   -0.936396  2457070.648138
# Heliocentric elements and errors
Epoch:              2457070.5000  =  2015/02/17
Mean Anomaly:          357.26763 +/-   267.518
Argument of Peri:      312.22334 +/-   334.820
Long of Asc Node:      204.67658 +/-     8.907
Inclination:            20.69808 +/-     2.607
Eccentricity:         0.02391536 +/-    0.5583
Semi-Major Axis:     47.18100954 +/-   24.5164
Time of Perihelion: 2457968.9357 +/-  443078.5
Perihelion:          46.05265851 +/-   35.5873
Aphelion:            48.30936056 +/-   36.3862
Period (y)              324.0851 +/-    252.60
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -40.44524676 +/-    2.1144
Ecliptic Y           18.07614709 +/-    0.9372
Ecliptic Z          -12.58595450 +/-    0.6719
Ecliptic XDOT        -0.00116424 +/-    0.0013
Ecliptic YDOT        -0.00221177 +/-    0.0009
Ecliptic ZDOT         0.00057571 +/-    0.0004
# Distances at JD0 (AU)
Heliocenter to KBO   46.05400449 +/-    1.9019
Geocenter to KBO     45.11374035 +/-    2.4084
# Hcoef:  7.64

The following table shows the complete astrometric record for 15DH249. 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 (15DH249) followed by the observatory code and reference code for the source of the astrometry.

2015 02  17.14736  10 07 46.36   -05 48 30.8   25.3g 15DH249   W84  C~2iOW      
2015 02  17.23303  10 07 45.98   -05 48 28.4   24.2g 15DH249   W84  C~2iOW      
2015 02  17.34887  10 07 45.51   -05 48 25.4   24.5g 15DH249   W84  C~2iOW      
2015 02  18.07632  10 07 42.48   -05 48 08.1   25.0g 15DH249   W84  C~2iOW      
2015 02  18.14392  10 07 42.16   -05 48 06.4   24.4g 15DH249   W84  C~2iOW      
2015 02  18.21185  10 07 41.87   -05 48 04.8   24.6g 15DH249   W84  C~2iOW      
2015 02  18.28208  10 07 41.56   -05 48 02.8   24.4g 15DH249   W84  C~2iOW      
2015 02  19.07317  10 07 38.24   -05 47 43.4   24.6g 15DH249   W84  C~2iOW      
2015 02  19.21032  10 07 37.66   -05 47 40.4   25.2g 15DH249   W84  C~2iOW      
2015 02  19.27907  10 07 37.37   -05 47 38.4   24.4g 15DH249   W84  C~2iOW      

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     0.08       0.00    -0.30
     2   0.0002     -6.16    -0.23       0.16    -0.05
     3   0.0006    -13.78     0.04       0.39     0.29
     4   0.0025    -62.19     0.42      -0.04     0.10
     5   0.0027    -67.26    -0.03      -0.20    -0.02
     6   0.0029    -71.87     0.00      -0.29    -0.06
     7   0.0031    -76.91    -0.23      -0.12     0.15
     8   0.0053   -130.12    -0.17      -0.18     0.09
     9   0.0056   -139.27     0.08      -0.55    -0.25
    10   0.0058   -144.03     0.03      -0.27     0.05

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.

15DH249    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