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 Fri Dec 15 02:38:08 2017
# Orbit generated from Bernstein formalism
# Fitting   21 observations of   21
# Arc:   1.20y
# First observation: 2015/08/15
#  Last observation: 2016/10/27
Preliminary a, adot, b, bdot, g, gdot:
  -0.000024   0.027529  -0.000003   0.011001   0.027378   0.000000
# Chi-squared of fit:    14.65 DOF:   36 RMS:  0.15
# Min/Max residuals:    -0.34    0.34
# Exact a, adot, b, bdot, g, gdot:
  1.585398E-05  2.704237E-02  6.139155E-06  1.081175E-02  2.693738E-02 -1.631321E-03
# Covariance matrix:
  3.0010E-13  4.0061E-13  3.8852E-14  2.4041E-13  5.9387E-13  2.3828E-11
  4.0061E-13  6.0550E-12  1.1065E-13  2.5833E-12  3.7625E-12  2.6980E-10
  3.8852E-14  1.1065E-13  1.6881E-13 -1.0330E-13  1.4620E-13  4.5714E-12
  2.4041E-13  2.5833E-12 -1.0330E-13  1.4040E-12  1.6617E-12  1.2024E-10
  5.9387E-13  3.7625E-12  1.4620E-13  1.6617E-12  3.0606E-12  1.7019E-10
  2.3828E-11  2.6980E-10  4.5714E-12  1.2024E-10  1.7019E-10  1.2584E-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:          327.33657 +/-     0.982
Argument of Peri:        5.35601 +/-     1.407
Long of Asc Node:       71.75804 +/-     0.003
Inclination:            26.12283 +/-     0.002
Eccentricity:         0.13414091 +/-    0.0027
Semi-Major Axis:     41.81295339 +/-    0.0256
Time of Perihelion: 2466200.8290 +/-     269.2
Perihelion:          36.20412562 +/-    0.1147
Aphelion:            47.42178115 +/-    0.1162
Period (y)              270.3799 +/-      0.25
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           28.46264874 +/-    0.0018
Ecliptic Y           22.08116337 +/-    0.0015
Ecliptic Z           -9.86669310 +/-    0.0006
Ecliptic XDOT        -0.00164347 +/-    0.0000
Ecliptic YDOT         0.00220216 +/-    0.0000
Ecliptic ZDOT         0.00110348 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   37.35039199 +/-    0.0016
Geocenter to KBO     37.12313967 +/-    0.0024
# Hcoef:  8.71

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 09  27.44396  02 50 57.75   +00 44 26.4   24.8g 15PL312   568  C~2NNK      
2016 09  27.56353  02 50 57.27   +00 44 23.1   24.8g 15PL312   568  C~2NNK      
2016 09  28.45298  02 50 53.77   +00 43 59.0   24.9g 15PL312   568  C~2NNK      
2016 09  28.57265  02 50 53.29   +00 43 55.7   24.9g 15PL312   568  C~2NNK      
2016 09  29.52511  02 50 49.47   +00 43 30.0   24.9g 15PL312   568  C~2NNK      
2016 09  29.58445  02 50 49.22   +00 43 28.4   24.6g 15PL312   568  C~2NNK      
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     0.00       0.00     0.04
  2   0.0246   -120.36     0.05    -160.26    -0.02
  3   0.0246   -120.39     0.07    -160.35    -0.08
  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    -0.09
  8   0.1695  -2985.97     0.11    -716.23     0.05
  9   0.1695  -2986.43    -0.16    -716.19     0.09
 10   0.1695  -2986.54     0.05    -716.04     0.24
 11   0.2184  -4444.28    -0.06    -663.88    -0.06
 12   1.0319   5428.29     0.21    2036.77     0.23
 13   1.1199   3999.68    -0.02    1636.98    -0.05
 14   1.1202   3991.81    -0.07    1636.05    -0.10
 15   1.1227   3934.42    -0.12    1629.25    -0.13
 16   1.1230   3926.55    -0.03    1628.32    -0.23
 17   1.1256   3864.11    -0.00    1621.47    -0.20
 18   1.1258   3860.05    -0.06    1621.10    -0.18
 19   1.1411   3475.27    -0.03    1588.22     0.25
 20   1.2012   1765.68    -0.18    1578.03     0.04
 21   1.2012   1765.63     0.32    1578.36     0.34

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        42.238    42.266    42.214
ecceobj         0.139     0.143     0.136
incobj         26.087    26.091    26.085
qmin           34.899    34.834    35.134
qmax           49.250    49.480    49.014
amean          41.924    41.973    41.924
amin           41.569    41.603    41.569
amax           42.316    42.375    42.312
emean           0.145     0.148     0.141
emin            0.126     0.131     0.124
emax            0.164     0.168     0.159
imean          24.451    24.473    24.468
imin           23.886    23.975    23.948
imax           24.980    25.026    25.015
excite_mean     0.439     0.440     0.438
fracstop        1.000     1.000     1.000
cjmean          2.844     2.843     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       176.0     176.9     176.0
kozaiamp        180.0     180.0     180.0