Orbit Fit and Astrometric record for 15DL249

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: 15DL249   
# Created Fri Mar 29 01:17:43 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   0.052499   0.000000  -0.005954   0.033365   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:    18.64 DOF:     23 RMS:  0.20
# Min/Max residuals:    -0.40    0.43
# Exact a, adot, b, bdot, g, gdot:
  1.705172E-05  3.534347E-02 -3.285754E-06 -6.310815E-03  3.063527E-02  5.711910E-03
# Covariance matrix:
  2.3153E-11  4.6042E-08  1.5931E-12  9.7087E-10  7.2903E-09 -2.5424E-08
  4.6042E-08  9.2385E-05  3.1927E-09  1.9485E-06  1.4620E-05 -5.8306E-05
  1.5931E-12  3.1927E-09  2.8008E-13  5.3658E-11  5.0537E-10 -1.7849E-09
  9.7087E-10  1.9485E-06  5.3658E-11  4.3983E-08  3.0832E-07 -1.3072E-06
  7.2903E-09  1.4620E-05  5.0537E-10  3.0832E-07  2.3138E-06 -8.9526E-06
 -2.5424E-08 -5.8306E-05 -1.7849E-09 -1.3072E-06 -8.9526E-06  5.9897E-04
#      lat0       lon0       xBary       yBary       zBary        JD0
  -10.090929  157.742757    0.168855   -0.169880   -0.955656  2457070.656158
# Heliocentric elements and errors
Epoch:              2457070.5000  =  2015/02/17
Mean Anomaly:           27.59575 +/-    85.583
Argument of Peri:      178.62905 +/-   163.645
Long of Asc Node:      293.99853 +/-     8.727
Inclination:            14.09817 +/-     2.192
Eccentricity:         0.25171877 +/-    0.5878
Semi-Major Axis:     42.18155250 +/-   22.0265
Time of Perihelion: 2449400.0306 +/-   23017.2
Perihelion:          31.56366404 +/-   29.7715
Aphelion:            52.79944096 +/-   37.0789
Period (y)              273.9631 +/-    214.59
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -30.58029448 +/-    1.4768
Ecliptic Y           12.69645349 +/-    0.6045
Ecliptic Z           -5.71940714 +/-    0.2840
Ecliptic XDOT        -0.00157370 +/-    0.0019
Ecliptic YDOT        -0.00277592 +/-    0.0012
Ecliptic ZDOT        -0.00064462 +/-    0.0004
# Distances at JD0 (AU)
Heliocenter to KBO   33.60157674 +/-    1.3641
Geocenter to KBO     32.64211853 +/-    1.6208
# Hcoef:  8.69

The following table shows the complete astrometric record for 15DL249. 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 (15DL249) followed by the observatory code and reference code for the source of the astrometry.

2015 02  17.15538  10 22 42.76   -00 42 41.7   24.0g 15DL249   W84  C~2iOW      
2015 02  17.24128  10 22 42.28   -00 42 39.4   24.2g 15DL249   W84  C~2iOW      
2015 02  17.31000  10 22 41.85   -00 42 37.1   25.7g 15DL249   W84  C~2iOW      
2015 02  17.35698  10 22 41.56   -00 42 36.4   24.7g 15DL249   W84  C~2iOW      
2015 02  18.08444  10 22 37.50   -00 42 17.4   23.9g 15DL249   W84  C~2iOW      
2015 02  18.15192  10 22 37.12   -00 42 15.8   24.4g 15DL249   W84  C~2iOW      
2015 02  18.22009  10 22 36.72   -00 42 13.8   24.1g 15DL249   W84  C~2iOW      
2015 02  18.29024  10 22 36.33   -00 42 11.8   24.2g 15DL249   W84  C~2iOW      
2015 02  19.08122  10 22 31.86   -00 41 50.8   24.5g 15DL249   W84  C~2iOW      
2015 02  19.21830  10 22 31.06   -00 41 47.5   24.2g 15DL249   W84  C~2iOW      
2015 02  19.28723  10 22 30.66   -00 41 45.5   24.0g 15DL249   W84  C~2iOW      
2015 02  19.35632  10 22 30.29   -00 41 43.8   24.0g 15DL249   W84  C~2iOW      
2015 02  24.12579  10 22 03.22   -00 39 31.3         15DL249   W84  C~2iOW      
2015 02  24.18731  10 22 02.89   -00 39 29.3         15DL249   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     0.25       0.00     0.01
     2   0.0002     -7.54     0.40      -0.51     0.15
     3   0.0004    -14.38    -0.29      -0.75     0.43
     4   0.0006    -18.69    -0.40      -1.70    -0.17
     5   0.0025    -82.30    -0.02      -6.45    -0.05
     6   0.0027    -88.19     0.13      -7.06    -0.17
     7   0.0029    -94.50    -0.05      -7.41    -0.03
     8   0.0031   -100.68     0.08      -7.71     0.19
     9   0.0053   -170.74    -0.08     -12.87     0.12
    10   0.0056   -183.12    -0.11     -14.22    -0.28
    11   0.0058   -189.43    -0.21     -14.57    -0.16
    12   0.0060   -195.22     0.22     -15.03    -0.15
    13   0.0191   -621.50    -0.12     -41.33    -0.11
    14   0.0193   -626.84     0.14     -41.29     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.

15DL249    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