Orbit Fit and Astrometric record for 14LP28

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: 14LP28    
# Created Mon Dec 11 02:38:06 2017
# Orbit generated from Bernstein formalism
# Fitting   18 observations of   18
# Arc:   2.03y
# First observation: 2013/07/16
#  Last observation: 2015/07/28
Preliminary a, adot, b, bdot, g, gdot:
  -0.000131   0.026137   0.000015  -0.006113   0.025698   0.000000
# Chi-squared of fit:     5.90 DOF:   30 RMS:  0.10
# Min/Max residuals:    -0.28    0.22
# Exact a, adot, b, bdot, g, gdot:
  1.586180E-05  2.614122E-02 -3.624246E-06 -6.104038E-03  2.612721E-02  4.871310E-04
# Covariance matrix:
  3.6089E-13 -5.3021E-13 -2.2188E-14  7.9777E-14 -2.0944E-13 -6.8238E-12
 -5.3021E-13  1.5447E-12  8.9818E-14 -3.1364E-13  1.0458E-12  2.6611E-11
 -2.2188E-14  8.9818E-14  2.7827E-13 -2.1661E-13  7.1528E-14  1.7724E-12
  7.9777E-14 -3.1364E-13 -2.1661E-13  2.7474E-13 -2.2797E-13 -6.2745E-12
 -2.0944E-13  1.0458E-12  7.1528E-14 -2.2797E-13  1.2975E-12  1.8818E-11
 -6.8238E-12  2.6611E-11  1.7724E-12 -6.2745E-12  1.8818E-11  5.3441E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    9.742388  -37.378096    0.489591    0.151181   -0.880417  2456490.025328
# Heliocentric elements and errors
Epoch:              2456490.5000  =  2013/07/17
Mean Anomaly:            6.60615 +/-     1.048
Argument of Peri:      136.11157 +/-     1.149
Long of Asc Node:      177.47524 +/-     0.002
Inclination:            16.08104 +/-     0.001
Eccentricity:         0.04440673 +/-    0.0002
Semi-Major Axis:     40.96234014 +/-    0.0051
Time of Perihelion: 2454733.2988 +/-     278.9
Perihelion:          39.14333669 +/-    0.0081
Aphelion:            42.78134359 +/-    0.0083
Period (y)              262.1714 +/-      0.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           30.38898683 +/-    0.0013
Ecliptic Y          -23.82851684 +/-    0.0010
Ecliptic Z            6.47663214 +/-    0.0003
Ecliptic XDOT         0.00178270 +/-    0.0000
Ecliptic YDOT         0.00207987 +/-    0.0000
Ecliptic ZDOT        -0.00062163 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   39.15655117 +/-    0.0012
Geocenter to KBO     38.27427068 +/-    0.0017
# Hcoef:  6.16

The following table shows the complete astrometric record for 14LP28. 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 (14LP28) followed by the observatory code and reference code for the source of the astrometry.

2013 07  16.52455  21 27 12.549  -04 44 46.28  22.0w 14LP28    F51  C~1vXY      
2013 07  16.54157  21 27 12.477  -04 44 46.57  22.1w 14LP28    F51  C~1vXY      
2013 07  16.55569  21 27 12.413  -04 44 46.78  22.0w 14LP28    F51  C~1vXY      
2013 07  16.57187  21 27 12.345  -04 44 47.00  21.9w 14LP28    F51  C~1vXY      
2014 06  03.55872  21 35 19.407  -04 31 48.22  22.1w 14LP28    F51  C~1vXY      
2014 06  03.57126  21 35 19.395  -04 31 48.14  22.0w 14LP28    F51  C~1vXY      
2014 06  03.58381  21 35 19.375  -04 31 48.16  22.4w 14LP28    F51  C~1vXY      
2014 08  20.37536  21 30 40.277  -04 49 48.68  21.9w 14LP28    F51  C~1vXY      
2014 08  20.38811  21 30 40.217  -04 49 48.89  22.0w 14LP28    F51  C~1vXY      
2014 08  20.40089  21 30 40.156  -04 49 49.31  22.1w 14LP28    F51  C~1vXY      
2014 08  20.41367  21 30 40.086  -04 49 49.54  22.1w 14LP28    F51  C~1vXY      
2014 08  21.35194  21 30 35.631  -04 50 17.13  22.1w 14LP28    F51  C~1vXY      
2014 08  21.36480  21 30 35.544  -04 50 17.56  21.9w 14LP28    F51  C~1vXY      
2014 08  21.37767  21 30 35.487  -04 50 17.72  21.9w 14LP28    F51  C~1vXY      
2014 08  21.39057  21 30 35.442  -04 50 18.07  22.1w 14LP28    F51  C~1vXY      
2015 07  28.44666  21 38 38.647  -04 30 58.68  21.2i 14LP28    F51  C~1vXZ      
2015 07  28.45910  21 38 38.578  -04 30 59.25  21.6i 14LP28    F51  C~1vXZ      
2015 07  28.47184  21 38 38.514  -04 30 59.14  21.6i 14LP28    F51  C~1vXZ      

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    -0.01
  2   0.0000     -1.11     0.01       0.07    -0.02
  3   0.0001     -2.09    -0.02       0.17     0.02
  4   0.0001     -3.12     0.03       0.28     0.06
  5   0.8817   7150.62     0.02   -1581.83     0.08
  6   0.8817   7150.47     0.05   -1581.70     0.08
  7   0.8818   7150.18    -0.06   -1581.62     0.02
  8   1.0947   2848.22    -0.00   -1273.53    -0.14
  9   1.0948   2847.30     0.08   -1273.44     0.01
 10   1.0948   2846.30     0.08   -1273.55    -0.05
 11   1.0948   2845.24     0.01   -1273.44     0.12
 12   1.0974   2773.32     0.09   -1278.39    -0.19
 13   1.0974   2771.95    -0.28   -1278.38    -0.13
 14   1.0975   2771.09    -0.13   -1278.26     0.05
 15   1.0975   2770.34     0.13   -1278.38    -0.00
 16   2.0313   9993.95     0.16   -2491.08     0.05
 17   2.0313   9992.79    -0.10   -2491.29    -0.17
 18   2.0313   9991.91    -0.05   -2490.87     0.22

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.

14LP28    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        41.075    41.090    41.059
ecceobj         0.048     0.048     0.047
incobj         16.053    16.053    16.053
qmin           38.449    38.152    38.493
qmax           43.944    44.280    43.923
amean          41.122    41.142    41.104
amin           40.806    40.820    40.801
amax           41.453    41.474    41.417
emean           0.046     0.048     0.045
emin            0.032     0.029     0.031
emax            0.062     0.068     0.061
imean          16.271    16.275    16.269
imin           15.500    15.490    15.503
imax           16.979    17.017    16.994
excite_mean     0.284     0.284     0.284
fracstop        1.000     1.000     1.000
cjmean          2.973     2.973     2.973

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       180.2     183.6     179.5
kozaiamp        180.0     180.0     180.0