Orbit Fit and Astrometric record for 15DP248

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: 15DP248   
# Created Fri Apr 19 01:17:09 2024
# Orbit generated from Bernstein formalism
# Fitting     14 observations of     14
# Arc:   7.03d
# First observation: 2015/02/17
#  Last observation: 2015/02/24
Preliminary a, adot, b, bdot, g, gdot:
   0.000001   0.014842  -0.000001   0.002838   0.021688   0.000000
# WARNING MRQMIN stopped after  13 iterations -- oscilliatory solution
# WARNING Fitting with energy constraint
# WARNING MRQMIN stopped after  13 iterations -- oscilliatory solution
# Chi-squared of fit:    12.21 DOF:     23 RMS:  0.17
# Min/Max residuals:    -0.30    0.34
# Exact a, adot, b, bdot, g, gdot:
  1.496749E-05  2.018756E-02  1.376327E-06  2.553401E-03  2.255203E-02  7.143341E-03
# Covariance matrix:
  4.3378E-11  6.0119E-08  7.1927E-13 -3.2283E-09  9.5593E-09 -1.0703E-07
  6.0119E-08  8.3709E-05  1.0018E-09 -4.4939E-06  1.3306E-05 -1.5076E-04
  7.1927E-13  1.0018E-09  1.8406E-13 -6.7952E-11  1.5922E-10 -1.8691E-09
 -3.2283E-09 -4.4939E-06 -6.7952E-11  2.4425E-07 -7.1435E-07  8.1073E-06
  9.5593E-09  1.3306E-05  1.5922E-10 -7.1435E-07  2.1152E-06 -2.3881E-05
 -1.0703E-07 -1.5076E-04 -1.8691E-09  8.1073E-06 -2.3881E-05  4.9043E-04
#      lat0       lon0       xBary       yBary       zBary        JD0
  -19.100513  141.639856   -0.106169   -0.320325   -0.925604  2457070.609368
# Heliocentric elements and errors
Epoch:              2457070.5000  =  2015/02/17
Mean Anomaly:           61.79950 +/-    70.483
Argument of Peri:      189.19465 +/-    79.347
Long of Asc Node:      210.55306 +/-    11.641
Inclination:            19.95071 +/-     1.476
Eccentricity:         0.33711453 +/-    1.0294
Semi-Major Axis:     47.82970796 +/-   24.0917
Time of Perihelion: 2436329.6062 +/-   17720.0
Perihelion:          31.70561850 +/-   51.7619
Aphelion:            63.95379742 +/-   58.8384
Period (y)              330.7918 +/-    249.93
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -33.69276317 +/-    2.1187
Ecliptic Y           26.52838187 +/-    1.6772
Ecliptic Z          -14.50983246 +/-    0.9357
Ecliptic XDOT        -0.00224673 +/-    0.0016
Ecliptic YDOT        -0.00135579 +/-    0.0022
Ecliptic ZDOT         0.00000924 +/-    0.0008
# Distances at JD0 (AU)
Heliocenter to KBO   45.27132175 +/-    1.8821
Geocenter to KBO     44.34190334 +/-    2.8596
# Hcoef:  7.18

The following table shows the complete astrometric record for 15DP248. 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 (15DP248) followed by the observatory code and reference code for the source of the astrometry.

2015 02  17.10859  09 11 49.27   -03 50 20.5   24.4g 15DP248   W84  C~2iOU      
2015 02  17.19356  09 11 48.91   -03 50 18.5   24.2g 15DP248   W84  C~2iOU      
2015 02  17.26222  09 11 48.62   -03 50 16.8         15DP248   W84  C~2iOU      
2015 02  18.03728  09 11 45.28   -03 49 56.9   23.8g 15DP248   W84  C~2iOU      
2015 02  18.10514  09 11 44.99   -03 49 55.2   24.0g 15DP248   W84  C~2iOU      
2015 02  18.17261  09 11 44.70   -03 49 53.6         15DP248   W84  C~2iOU      
2015 02  18.24095  09 11 44.42   -03 49 51.9         15DP248   W84  C~2iOU      
2015 02  18.31138  09 11 44.10   -03 49 49.6   24.2g 15DP248   W84  C~2iOU      
2015 02  19.03405  09 11 41.01   -03 49 30.7   24.1g 15DP248   W84  C~2iOU      
2015 02  19.10178  09 11 40.74   -03 49 29.0   24.1g 15DP248   W84  C~2iOU      
2015 02  19.23925  09 11 40.16   -03 49 25.3   24.4g 15DP248   W84  C~2iOU      
2015 02  19.30837  09 11 39.83   -03 49 23.7   24.0g 15DP248   W84  C~2iOU      
2015 02  24.07905  09 11 19.82   -03 47 14.4         15DP248   W84  C~2iOU      
2015 02  24.13962  09 11 19.58   -03 47 12.8         15DP248   W84  C~2iOU      

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    -0.17       0.00     0.09
     2   0.0002     -5.74     0.05       0.22    -0.01
     3   0.0004    -10.40     0.22       0.47    -0.01
     4   0.0025    -64.10    -0.13       3.75    -0.11
     5   0.0027    -68.75    -0.04       4.01    -0.14
     6   0.0029    -73.38     0.06       4.17    -0.25
     7   0.0031    -77.89     0.33       4.47    -0.24
     8   0.0033    -83.16    -0.02       5.16     0.15
     9   0.0053   -133.00    -0.30       8.66     0.14
    10   0.0055   -137.37     0.05       9.01     0.18
    11   0.0058   -146.77     0.24       9.81     0.34
    12   0.0060   -151.96    -0.14       9.78    -0.01
    13   0.0191   -476.86    -0.09      38.95    -0.04
    14   0.0192   -480.77     0.14      39.35    -0.06

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.

15DP248    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