Orbit Fit and Astrometric record for 15PZ315

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: 15PZ315   
# Created Sat Mar 30 01:18:09 2024
# Orbit generated from Bernstein formalism
# Fitting      9 observations of      9
# Arc:   1.22y
# First observation: 2015/08/15
#  Last observation: 2016/11/03
Preliminary a, adot, b, bdot, g, gdot:
   0.000000   0.014802   0.000000   0.000324   0.018772   0.000000
# Chi-squared of fit:     3.18 DOF:     12 RMS:  0.11
# Min/Max residuals:    -0.21    0.17
# Exact a, adot, b, bdot, g, gdot:
  1.294198E-05  1.480861E-02 -2.375290E-07  3.283013E-04  1.878438E-02 -4.654218E-03
# Covariance matrix:
  7.3930E-13  3.2221E-11 -1.1052E-14  8.1757E-13  4.1728E-11  1.9652E-09
  3.2221E-11  4.2664E-09 -1.4109E-12  1.0588E-10  5.4554E-09  2.5596E-07
 -1.1052E-14 -1.4109E-12  4.8866E-13 -4.5976E-13 -1.8007E-12 -8.5879E-11
  8.1757E-13  1.0588E-10 -4.5976E-13  3.2203E-12  1.3530E-10  6.3881E-09
  4.1728E-11  5.4554E-09 -1.8007E-12  1.3530E-10  6.9769E-09  3.2724E-07
  1.9652E-09  2.5596E-07 -8.5879E-11  6.3881E-09  3.2724E-07  1.5389E-05
#      lat0       lon0       xBary       yBary       zBary        JD0
   -4.225894  -37.324511    0.012997   -0.074679   -1.012614  2457249.641549
# Heliocentric elements and errors
Epoch:              2457240.5000  =  2015/08/06
Mean Anomaly:          274.54575 +/-    40.036
Argument of Peri:       46.85406 +/-    21.278
Long of Asc Node:       35.19584 +/-     0.257
Inclination:             4.34670 +/-     0.006
Eccentricity:         0.30657679 +/-    0.1967
Semi-Major Axis:     50.85198523 +/-    7.2106
Time of Perihelion: 2488681.1469 +/-   13124.9
Perihelion:          35.26194662 +/-   11.1840
Aphelion:            66.44202383 +/-   13.7419
Period (y)              362.6353 +/-     77.13
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           43.01513544 +/-    0.1877
Ecliptic Y          -32.81649436 +/-    0.1432
Ecliptic Z           -3.92288196 +/-    0.0174
Ecliptic XDOT         0.00077148 +/-    0.0005
Ecliptic YDOT         0.00211807 +/-    0.0003
Ecliptic ZDOT         0.00009776 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   54.24585866 +/-    0.1722
Geocenter to KBO     53.23570830 +/-    0.2367
# Hcoef:  7.30

The following table shows the complete astrometric record for 15PZ315. 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 (15PZ315) followed by the observatory code and reference code for the source of the astrometry.

2015 08  15.14076  21 45 53.230  -17 56 49.01  24.5r 15PZ315   807  C~2Zs9      
2015 08  15.19904  21 45 53.024  -17 56 50.30        15PZ315   807  C~2Zs9      
2015 08  16.16718  21 45 49.331  -17 57 08.44        15PZ315   807  C~2Zs9      
2016 09  25.03629  21 46 46.927  -17 49 45.44        15PZ315   304  C~2Zs9      
2016 09  25.11768  21 46 46.690  -17 49 46.13        15PZ315   304  C~2Zs9      
2016 09  26.01542  21 46 44.116  -17 49 56.00        15PZ315   304  C~2Zs9      
2016 10  01.07868  21 46 30.392  -17 50 46.42        15PZ315   304  C~2Zs9      
2016 11  02.06604  21 45 39.726  -17 52 31.89        15PZ315   304  C~2Zs9      
2016 11  03.04166  21 45 39.290  -17 52 28.96        15PZ315   304  C~2Zs9      

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    -0.10       0.00     0.11
     2   0.0002     -3.20     0.10      -0.24    -0.16
     3   0.0028    -58.93     0.00       0.17     0.06
     4   1.1140    863.83     0.06     144.09    -0.08
     5   1.1142    860.41     0.17     144.57     0.10
     6   1.1167    822.47    -0.09     147.52     0.05
     7   1.1306    620.91    -0.21     165.33    -0.17
     8   1.2181    -96.33     0.06     306.56     0.02
     9   1.2208   -101.23     0.00     311.39     0.07

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.

15PZ315    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