Orbit Fit and Astrometric record for 12VP113

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: 12VP113   
# Created Wed Oct 18 01:38:12 2017
# Orbit generated from Bernstein formalism
# Fitting   28 observations of   28
# Arc:   5.04y
# First observation: 2011/10/22
#  Last observation: 2016/11/04
Preliminary a, adot, b, bdot, g, gdot:
  -0.000023   0.010255  -0.000009   0.003243   0.012032   0.000000
# Chi-squared of fit:    48.58 DOF:   50 RMS:  0.23
# Min/Max residuals:    -0.73    0.49
# Exact a, adot, b, bdot, g, gdot:
  1.350936E-05  1.033313E-02  5.522581E-06  3.267597E-03  1.221944E-02  1.663604E-03
# Covariance matrix:
  5.1765E-13 -4.6411E-13  1.0373E-13 -1.2703E-13 -6.7817E-14 -7.3204E-12
 -4.6411E-13  4.9741E-13 -1.2628E-13  1.4702E-13  1.2636E-13  8.4589E-12
  1.0373E-13 -1.2628E-13  2.0202E-13 -1.1215E-13 -5.7462E-14 -2.3837E-12
 -1.2703E-13  1.4702E-13 -1.1215E-13  9.3109E-14  4.4356E-14  2.7535E-12
 -6.7817E-14  1.2636E-13 -5.7462E-14  4.4356E-14  1.8694E-13  2.5103E-12
 -7.3204E-12  8.4589E-12 -2.3837E-12  2.7535E-12  2.5103E-12  1.5838E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
  -17.019159   48.377854    0.334427   -0.273258   -0.892756  2455857.051269
# Heliocentric elements and errors
Epoch:              2455850.5000  =  2011/10/16
Mean Anomaly:            2.61278 +/-     0.019
Argument of Peri:      293.88677 +/-     0.143
Long of Asc Node:       90.85608 +/-     0.002
Inclination:            24.02904 +/-     0.001
Eccentricity:         0.70392770 +/-    0.0008
Semi-Major Axis:    271.91503773 +/-    0.6627
Time of Perihelion: 2443964.1570 +/-      74.3
Perihelion:          80.50650946 +/-    0.3005
Aphelion:           463.32356601 +/-    1.1519
Period (y)             4483.9219 +/-     16.39
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           52.84971510 +/-    0.0018
Ecliptic Y           58.97494209 +/-    0.0021
Ecliptic Z          -23.95252545 +/-    0.0008
Ecliptic XDOT        -0.00135526 +/-    0.0000
Ecliptic YDOT         0.00196954 +/-    0.0000
Ecliptic ZDOT         0.00059103 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   82.73366701 +/-    0.0019
Geocenter to KBO     81.83683433 +/-    0.0029
# Hcoef:  4.08

The following table shows the complete astrometric record for 12VP113. 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 (12VP113) followed by the observatory code and reference code for the source of the astrometry.

2011 10  22.550503 03 22 15.529  +00 54 17.81  22.5R 12VP113   568  C~1286      
2011 10  22.553946 03 22 15.522  +00 54 17.80  22.8R 12VP113   568  C~1286      
2012 11  05.19447  03 23 47.159  +01 12 01.65  23.1r 12VP113   807  C~10W7      
2012 11  05.19585  03 23 47.154  +01 12 01.54        12VP113   807  C~10W7      
2012 11  05.19722  03 23 47.085  +01 12 01.11        12VP113   807  C~1286      
2012 11  05.19861  03 23 47.088  +01 12 01.53        12VP113   807  C~1286      
2012 11  05.26339  03 23 46.978  +01 12 00.61        12VP113   807  C~1286      
2012 11  05.26476  03 23 46.947  +01 12 00.74        12VP113   807  C~1286      
2012 11  05.26755  03 23 46.950  +01 12 00.72        12VP113   807  C~1286      
2012 11  05.34585  03 23 46.777  +01 12 00.64        12VP113   807  C~1286      
2012 11  05.34721  03 23 46.797  +01 11 59.81        12VP113   807  C~1286      
2012 11  05.34996  03 23 46.760  +01 12 00.28        12VP113   807  C~1286      
2013 03  10.01482  03 21 38.344  +01 25 39.33        12VP113   304  C~1286      
2013 03  10.03753  03 21 38.361  +01 25 39.54        12VP113   304  C~1286      
2013 03  10.05447  03 21 38.382  +01 25 40.22        12VP113   304  C~1286      
2013 03  11.01704  03 21 39.889  +01 25 58.46        12VP113   304  C~1286      
2013 03  11.02837  03 21 39.911  +01 25 58.47        12VP113   304  C~1286      
2013 03  11.05185  03 21 39.948  +01 25 58.99        12VP113   304  C~1286      
2013 08  10.34128  03 27 34.587  +01 48 43.12  23.3r 12VP113   304  C~1286      
2013 08  10.36004  03 27 34.579  +01 48 42.93  23.3r 12VP113   304  C~1286      
2013 08  10.41789  03 27 34.612  +01 48 42.58  23.2r 12VP113   304  C~1286      
2013 08  11.38266  03 27 35.213  +01 48 34.79  23.2r 12VP113   304  C~1286      
2013 08  11.41952  03 27 35.230  +01 48 34.28  23.3r 12VP113   304  C~1286      
2013 10  28.25273  03 26 11.698  +01 33 29.90        12VP113   304  C~1286      
2013 10  29.24975  03 26 09.381  +01 33 19.13        12VP113   304  C~1286      
2013 10  30.33180  03 26 06.819  +01 33 08.55  23.1r 12VP113   304  C~1286      
2016 11  02.20670  03 32 11.066  +02 32 25.89  23.1r 12VP113   304  C~2ADZ      
2016 11  04.15229  03 32 06.397  +02 32 08.13        12VP113   304  C~2ADZ      

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    -0.03       0.00    -0.27
  2   0.0000     -0.10    -0.01       0.02    -0.24
  3   1.0394   1606.48     0.38     663.01     0.09
  4   1.0394   1606.38     0.33     662.92     0.00
  5   1.0394   1605.27    -0.73     662.78    -0.14
  6   1.0394   1605.42    -0.52     663.18     0.25
  7   1.0396   1603.59     0.12     662.72    -0.26
  8   1.0396   1603.18    -0.24     662.97    -0.02
  9   1.0396   1603.21    -0.10     662.94    -0.05
 10   1.0398   1600.69     0.37     663.55     0.48
 11   1.0398   1600.76     0.49     662.67    -0.40
 12   1.0398   1600.35     0.18     663.27     0.20
 13   1.3811    -40.61     0.24    1962.06     0.13
 14   1.3812    -40.31    -0.07    1962.20    -0.02
 15   1.3813    -39.82    -0.05    1962.77     0.34
 16   1.3839    -13.21    -0.00    1974.39     0.18
 17   1.3839    -12.89     0.00    1974.31    -0.04
 18   1.3840    -12.22     0.03    1974.67     0.03
 19   1.8009   5478.23     0.11    1886.82    -0.08
 20   1.8010   5478.06    -0.18    1886.67    -0.04
 21   1.8011   5478.45    -0.16    1886.20     0.07
 22   1.8038   5485.09     0.18    1876.31    -0.00
 23   1.8039   5485.20     0.08    1875.75    -0.19
 24   2.0170   4037.68    -0.21    1333.49     0.15
 25   2.0197   4001.31    -0.13    1332.27    -0.27
 26   2.0227   3961.45    -0.18    1332.20     0.29
 27   5.0312  10174.53     0.09    3328.00    -0.29
 28   5.0366  10102.18     0.01    3329.24     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.

12VP113    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj       275.677   277.744   273.685
ecceobj         0.708     0.710     0.706
incobj         24.022    24.021    24.022
qmin           76.898    76.721    77.045
qmax          470.845   475.072   466.772
amean         263.035   264.904   261.237
amin          254.847   256.256   252.946
amax          275.677   277.744   273.685
emean           0.693     0.696     0.691
emin            0.680     0.683     0.678
emax            0.708     0.710     0.706
imean          22.555    22.555    22.556
imin           22.272    22.270    22.264
imax           22.866    22.863    22.873
excite_mean     0.793     0.795     0.790
fracstop        1.000     1.000     1.000
cjmean          4.048     4.048     4.048

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       297.0     296.5     297.4
kozaiamp          4.5       4.5       4.6