Orbit Fit and Astrometric record for 15PL312

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: 15PL312   
# Created Tue Oct 17 01:38:34 2017
# Orbit generated from Bernstein formalism
# Fitting   15 observations of   15
# Arc:   1.20y
# First observation: 2015/08/15
#  Last observation: 2016/10/27
Preliminary a, adot, b, bdot, g, gdot:
  -0.000028   0.027492  -0.000005   0.010997   0.027358   0.000000
# Chi-squared of fit:     8.25 DOF:   24 RMS:  0.13
# Min/Max residuals:    -0.34    0.28
# Exact a, adot, b, bdot, g, gdot:
  1.584654E-05  2.704202E-02  6.072594E-06  1.081237E-02  2.693714E-02 -1.669781E-03
# Covariance matrix:
  3.0169E-13  4.2406E-13  3.7934E-14  2.6455E-13  6.1059E-13  2.5875E-11
  4.2406E-13  6.4169E-12  9.9870E-14  2.9130E-12  4.0180E-12  3.0150E-10
  3.7934E-14  9.9870E-14  1.7018E-13 -1.2592E-13  1.3834E-13  3.7302E-12
  2.6455E-13  2.9130E-12 -1.2592E-13  1.8609E-12  1.8980E-12  1.4792E-10
  6.1059E-13  4.0180E-12  1.3834E-13  1.8980E-12  3.2416E-12  1.9262E-10
  2.5875E-11  3.0150E-10  3.7302E-12  1.4792E-10  1.9262E-10  1.5380E-08
#      lat0       lon0       xBary       yBary       zBary        JD0
  -15.413812   39.375183    0.990110   -0.059690   -0.217113  2457249.894678
# Heliocentric elements and errors
Epoch:              2457240.5000  =  2015/08/06
Mean Anomaly:          327.02069 +/-     1.065
Argument of Peri:        5.82933 +/-     1.533
Long of Asc Node:       71.75501 +/-     0.004
Inclination:            26.12463 +/-     0.002
Eccentricity:         0.13508674 +/-    0.0030
Semi-Major Axis:     41.82230964 +/-    0.0285
Time of Perihelion: 2466290.5199 +/-     292.0
Perihelion:          36.17267005 +/-    0.1280
Aphelion:            47.47194923 +/-    0.1297
Period (y)              270.4707 +/-      0.28
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           28.46288749 +/-    0.0019
Ecliptic Y           22.08135896 +/-    0.0015
Ecliptic Z           -9.86678075 +/-    0.0007
Ecliptic XDOT        -0.00164636 +/-    0.0000
Ecliptic YDOT         0.00219977 +/-    0.0000
Ecliptic ZDOT         0.00110459 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   37.35071271 +/-    0.0017
Geocenter to KBO     37.12346050 +/-    0.0025
# Hcoef:  8.58

The following table shows the complete astrometric record for 15PL312. 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 (15PL312) followed by the observatory code and reference code for the source of the astrometry.

2015 08  15.393889 02 47 17.60   -00 02 00.6   23.5i 15PL312   W84  C~2B02      
2015 08  24.361215 02 47 13.25   -00 05 10.1   24.8r 15PL312   W84  C~2B02      
2015 08  24.363588 02 47 13.25   -00 05 10.2   23.8i 15PL312   W84  C~2B02      
2015 08  24.367593 02 47 13.24   -00 05 10.6   23.3z 15PL312   W84  C~2B02      
2015 09  12.310602 02 46 38.28   -00 13 09.2   24.4r 15PL312   W84  C~2B02      
2015 09  12.316910 02 46 38.27   -00 13 09.6   23.5z 15PL312   W84  C~2B02      
2015 10  16.294670 02 44 22.88   -00 28 40.2   24.8g 15PL312   W84  C~2B02      
2015 10  16.296875 02 44 22.87   -00 28 40.1   23.4r 15PL312   W84  C~2B02      
2015 10  16.299225 02 44 22.84   -00 28 40.2   23.7i 15PL312   W84  C~2B02      
2015 10  16.303206 02 44 22.83   -00 28 40.1   23.7z 15PL312   W84  C~2B02      
2015 11  03.178229 02 42 49.31   -00 35 18.4   23.3z 15PL312   W84  C~2B02      
2016 08  26.293206 02 52 20.15   +00 58 05.4   24.4r 15PL312   W84  C~2B02      
2016 10  05.184826 02 50 25.49   +00 40 58.9   23.3z 15PL312   W84  C~2B02      
2016 10  27.117662 02 48 37.26   +00 32 03.8   23.1i 15PL312   W84  C~2B02      
2016 10  27.124282 02 48 37.25   +00 32 04.1   23.1z 15PL312   W84  C~2B02      

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     0.01       0.00     0.06
  2   0.0246   -120.36     0.05    -160.26    -0.01
  3   0.0246   -120.39     0.07    -160.35    -0.07
  4   0.0246   -120.65    -0.11    -160.69    -0.34
  5   0.0764   -766.81    -0.02    -454.86     0.24
  6   0.0764   -767.08     0.02    -455.19    -0.02
  7   0.1695  -2985.86     0.05    -716.37    -0.11
  8   0.1695  -2985.97     0.11    -716.23     0.04
  9   0.1695  -2986.43    -0.16    -716.19     0.08
 10   0.1695  -2986.54     0.04    -716.04     0.22
 11   0.2184  -4444.28    -0.05    -663.88    -0.08
 12   1.0319   5428.29     0.07    2036.77     0.02
 13   1.1411   3475.27    -0.12    1588.22     0.04
 14   1.2012   1765.68    -0.22    1578.03    -0.19
 15   1.2012   1765.63     0.28    1578.36     0.11

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.

15PL312    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        42.247    42.279    42.222
ecceobj         0.140     0.145     0.137
incobj         26.089    26.095    26.086
qmin           35.075    34.798    35.086
qmax           49.118    49.536    49.009
amean          41.944    41.981    41.921
amin           41.587    41.611    41.557
amax           42.323    42.388    42.296
emean           0.144     0.150     0.143
emin            0.126     0.132     0.125
emax            0.162     0.170     0.159
imean          24.491    24.498    24.466
imin           23.986    23.964    23.930
imax           25.021    25.062    24.967
excite_mean     0.439     0.441     0.438
fracstop        1.000     1.000     1.000
cjmean          2.844     2.842     2.845

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       178.7     176.5     174.6
kozaiamp        180.0     180.0     180.0