Orbit Fit and Astrometric record for 15DV224

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: 15DV224   
# Created Thu Sep 20 01:38:39 2018
# Orbit generated from Bernstein formalism
# Fitting   69 observations of   69
# Arc:   4.20y
# First observation: 2014/01/26
#  Last observation: 2018/04/10
Preliminary a, adot, b, bdot, g, gdot:
   0.000770   0.055504   0.001091   0.024688   0.039757   0.000000
# Chi-squared of fit:    35.22 DOF:  132 RMS:  0.13
# Min/Max residuals:    -0.52    0.30
# Exact a, adot, b, bdot, g, gdot:
  2.247986E-05  5.843008E-02  1.010674E-05  2.625522E-02  4.205318E-02  1.958022E-02
# Covariance matrix:
  2.0056E-13 -1.1075E-13  2.7861E-14 -3.4429E-14  3.0792E-14 -3.2896E-13
 -1.1075E-13  2.0970E-13 -6.8173E-14  9.5436E-14  1.2301E-13  9.0981E-13
  2.7861E-14 -6.8173E-14  1.2657E-13 -7.0463E-14 -4.1601E-14 -3.2125E-13
 -3.4429E-14  9.5436E-14 -7.0463E-14  6.4230E-14  6.3352E-14  4.5104E-13
  3.0792E-14  1.2301E-13 -4.1601E-14  6.3352E-14  1.6572E-13  6.0312E-13
 -3.2896E-13  9.0981E-13 -3.2125E-13  4.5104E-13  6.0312E-13  4.2996E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
  -19.096962  174.575657    0.732773   -0.213885   -0.618110  2456684.048938
# Heliocentric elements and errors
Epoch:              2456680.5000  =  2014/01/23
Mean Anomaly:            8.45466 +/-     0.001
Argument of Peri:      277.80611 +/-     0.003
Long of Asc Node:      209.29177 +/-     0.000
Inclination:            29.45760 +/-     0.000
Eccentricity:         0.61389418 +/-    0.0000
Semi-Major Axis:     57.10220475 +/-    0.0052
Time of Perihelion: 2452979.0550 +/-       0.2
Perihelion:          22.04749376 +/-    0.0029
Aphelion:            92.15691575 +/-    0.0086
Period (y)              431.5067 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -22.95325775 +/-    0.0002
Ecliptic Y            2.91720011 +/-    0.0000
Ecliptic Z           -7.77964638 +/-    0.0001
Ecliptic XDOT        -0.00212150 +/-    0.0000
Ecliptic YDOT        -0.00362291 +/-    0.0000
Ecliptic ZDOT         0.00119834 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   24.41075574 +/-    0.0002
Geocenter to KBO     23.77941436 +/-    0.0002
# Hcoef:  7.78

The following table shows the complete astrometric record for 15DV224. 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 (15DV224) followed by the observatory code and reference code for the source of the astrometry.

2014 01  26.54816  11 09 10.695  -15 20 43.51  21.9G 15DV224   F51  C           
2014 02  13.55456  11 07 27.250  -15 14 57.94  21.2G 15DV224   F51  C           
2014 02  21.48797  11 06 34.138  -15 10 14.68  21.4i 15DV224   F51  C~2dZl      
2014 02  21.50021  11 06 34.079  -15 10 14.60  21.2i 15DV224   F51  C~2dZl      
2014 02  21.51244  11 06 33.974  -15 10 14.39  21.2i 15DV224   F51  C~2dZl      
2014 12  18.60666  11 25 11.215  -15 07 10.21  22.1G 15DV224   F51  C           
2015 02  23.46403  11 21 30.382  -15 08 23.67  21.7w 15DV224   F51  C~1vYK      
2015 02  23.47553  11 21 30.301  -15 08 23.18  21.5w 15DV224   F51  C~1vYK      
2015 02  23.48703  11 21 30.231  -15 08 22.75  21.6w 15DV224   F51  C~1vYK      
2015 02  23.49853  11 21 30.150  -15 08 22.28  21.5w 15DV224   F51  C~1vYK      
2015 04  10.34692  11 16 25.553  -14 23 03.58  21.8w 15DV224   F51  C~1vYK      
2015 04  10.35754  11 16 25.498  -14 23 02.79  21.6w 15DV224   F51  C~1vYK      
2015 04  10.36817  11 16 25.431  -14 23 02.05  21.8w 15DV224   F51  C~1vYK      
2015 04  10.37882  11 16 25.384  -14 23 01.23  22.2w 15DV224   F51  C~1vYK      
2015 04  16.30100  11 15 54.074  -14 15 56.72  21.6w 15DV224   F51  C~1vYK      
2015 04  16.31185  11 15 54.017  -14 15 55.98  21.5w 15DV224   F51  C~1vYK      
2015 04  16.32270  11 15 53.962  -14 15 54.97  21.7w 15DV224   F51  C~1vYK      
2015 04  16.33358  11 15 53.911  -14 15 54.35  21.6w 15DV224   F51  C~1vYK      
2015 04  18.30133  11 15 44.287  -14 13 32.63  21.7w 15DV224   F51  C~1vYK      
2015 04  18.31196  11 15 44.232  -14 13 32.06  21.8w 15DV224   F51  C~1vYK      
2015 04  18.32260  11 15 44.174  -14 13 31.43  22.0w 15DV224   F51  C~1vYK      
2015 04  18.33321  11 15 44.124  -14 13 30.39  21.7w 15DV224   F51  C~1vYK      
2015 05  17.26828  11 14 16.977  -13 40 26.95  21.7w 15DV224   F51  C~1vYK      
2015 05  17.27989  11 14 16.948  -13 40 26.37  21.7w 15DV224   F51  C~1vYK      
2015 05  17.29148  11 14 16.929  -13 40 25.51  21.7w 15DV224   F51  C~1vYK      
2015 05  17.30310  11 14 16.913  -13 40 24.88  21.7w 15DV224   F51  C~1vYK      
2015 05  18.29168  11 14 15.951  -13 39 23.51  21.7G 15DV224   F51  C           
2016 03  01.43869  11 35 19.682  -14 59 49.27  21.1G 15DV224   F51  C           
2016 03  01.44941  11 35 19.604  -14 59 48.60  21.6G 15DV224   F51  C           
2016 03  01.45979  11 35 19.530  -14 59 48.17  21.1G 15DV224   F51  C           
2016 03  01.47020  11 35 19.471  -14 59 47.81  21.2G 15DV224   F51  C           
2016 03  15.38876  11 33 44.252  -14 47 59.27  21.0G 15DV224   F51  C           
2016 04  03.34432  11 31 38.273  -14 28 14.78  21.7G 15DV224   F51  C           
2016 04  03.35557  11 31 38.202  -14 28 13.98  21.7G 15DV224   F51  C           
2016 04  03.36683  11 31 38.132  -14 28 13.33  21.8G 15DV224   F51  C           
2016 04  03.37808  11 31 38.058  -14 28 12.42  21.6G 15DV224   F51  C           
2016 04  29.30339  11 29 24.298  -13 58 28.39  21.3G 15DV224   F51  C           
2016 04  29.31502  11 29 24.246  -13 58 27.53  21.8G 15DV224   F51  C           
2016 04  29.32665  11 29 24.205  -13 58 26.72  21.2G 15DV224   F51  C           
2016 04  29.33826  11 29 24.145  -13 58 26.11  21.0G 15DV224   F51  C           
2016 05  21.32754  11 28 30.485  -13 35 05.23  22.0G 15DV224   F51  C           
2017 01  30.54419  11 52 00.448  -15 06 22.32  22.2G 15DV224   F51  C           
2017 01  30.55581  11 52 00.394  -15 06 22.30  21.7G 15DV224   F51  C           
2017 01  30.56743  11 52 00.350  -15 06 22.19  22.1G 15DV224   F51  C           
2017 01  30.57906  11 52 00.305  -15 06 22.04  21.8G 15DV224   F51  C           
2017 02  17.51763  11 50 33.651  -15 00 30.76  22.4G 15DV224   F51  C           
2017 02  17.53010  11 50 33.580  -15 00 30.24  22.0G 15DV224   F51  C           
2017 02  17.54259  11 50 33.502  -15 00 29.96  21.7G 15DV224   F51  C           
2017 02  17.55506  11 50 33.436  -15 00 29.68  21.4G 15DV224   F51  C           
2017 03  21.39117  11 47 07.774  -14 36 34.49  21.9G 15DV224   F51  C           
2017 03  21.40236  11 47 07.693  -14 36 33.91  21.9G 15DV224   F51  C           
2017 03  21.41358  11 47 07.626  -14 36 33.28  21.7G 15DV224   F51  C           
2017 03  21.42479  11 47 07.548  -14 36 32.62  21.6G 15DV224   F51  C           
2017 03  31.36541  11 46 01.461  -14 26 29.68  21.6G 15DV224   F51  C           
2017 03  31.37728  11 46 01.381  -14 26 28.99  21.6G 15DV224   F51  C           
2017 03  31.38916  11 46 01.301  -14 26 28.24  21.5G 15DV224   F51  C           
2017 03  31.40104  11 46 01.227  -14 26 27.32  21.9G 15DV224   F51  C           
2017 04  25.32379  11 43 39.159  -13 59 03.84  22.1G 15DV224   F51  C           
2017 04  25.33424  11 43 39.125  -13 59 03.12  22.1G 15DV224   F51  C           
2017 04  25.34470  11 43 39.079  -13 59 02.44  22.8G 15DV224   F51  C           
2017 04  25.35520  11 43 39.017  -13 59 01.67  21.9G 15DV224   F51  C           
2017 12  31.62545  12 05 54.482  -14 52 19.09  22.3G 15DV224   F51  C           
2018 02  11.55147  12 04 25.543  -14 53 28.72  22.1G 15DV224   F51  C           
2018 02  11.56330  12 04 25.482  -14 53 28.46  21.8G 15DV224   F51  C           
2018 02  11.57515  12 04 25.431  -14 53 28.23  22.0G 15DV224   F51  C           
2018 02  11.58698  12 04 25.375  -14 53 27.95  22.2G 15DV224   F51  C           
2018 03  22.41861  12 00 30.753  -14 27 25.81  22.3G 15DV224   F51  C           
2018 04  10.17619  11 58 29.527  -14 08 38.19  21.7R 15DV224   G37  C~2dZl      
2018 04  10.22848  11 58 29.179  -14 08 34.63        15DV224   G37  C~2dZl      

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    -0.11       0.00    -0.05
  2   0.0493  -1506.32    -0.38    -301.01     0.30
  3   0.0710  -2323.53    -0.31    -360.46     0.07
  4   0.0711  -2324.34     0.22    -360.74    -0.15
  5   0.0711  -2325.81     0.09    -361.18    -0.52
  6   0.8927  12419.05    -0.02    6345.77     0.05
  7   1.0757   9501.19    -0.02    5007.74     0.08
  8   1.0758   9499.91    -0.06    5007.72     0.09
  9   1.0758   9498.81     0.06    5007.71     0.11
 10   1.0758   9497.54     0.03    5007.68     0.11
 11   1.2014   4352.94     0.03    5728.11     0.07
 12   1.2014   4351.89     0.09    5728.51     0.13
 13   1.2014   4350.70     0.01    5728.80     0.08
 14   1.2015   4349.74     0.17    5729.27     0.21
 15   1.2177   3761.68     0.13    5934.12     0.04
 16   1.2177   3760.63     0.13    5934.46     0.00
 17   1.2177   3759.49     0.05    5935.06     0.22
 18   1.2178   3758.56     0.18    5935.33     0.10
 19   1.2231   3573.20     0.15    6008.49     0.19
 20   1.2232   3572.24     0.20    6008.69    -0.00
 21   1.2232   3571.21     0.18    6008.92    -0.16
 22   1.2232   3570.12     0.10    6009.58     0.11
 23   1.3025   1606.14     0.10    7310.86     0.02
 24   1.3025   1605.52    -0.04    7311.22    -0.20
 25   1.3025   1604.92    -0.16    7311.90    -0.10
 26   1.3025   1604.45    -0.15    7312.38    -0.20
 27   1.3053   1566.72    -0.12    7362.85     0.01
 28   2.0942  20433.06    -0.07   10207.84    -0.07
 29   2.0942  20431.74    -0.21   10208.03     0.09
 30   2.0942  20430.57    -0.24   10208.01     0.04
 31   2.0942  20429.64    -0.04   10208.01     0.01
 32   2.1323  18867.43    -0.02   10329.18    -0.19
 33   2.1842  16705.54    -0.05   10713.19    -0.04
 34   2.1843  16704.27    -0.05   10713.52     0.01
 35   2.1843  16703.07     0.01   10713.73    -0.08
 36   2.1843  16701.72    -0.08   10714.15     0.05
 37   2.2553  14200.37     0.05   11601.59    -0.02
 38   2.2554  14199.33    -0.05   11602.08     0.01
 39   2.2554  14198.46     0.01   11602.60     0.06
 40   2.2554  14197.41    -0.10   11602.82    -0.19
 41   2.3156  12924.69     0.06   12589.94    -0.29
 42   3.0116  34314.50     0.13   15390.98     0.09
 43   3.0117  34313.74     0.06   15390.70    -0.03
 44   3.0117  34313.09     0.09   15390.56    -0.01
 45   3.0117  34312.41     0.10   15390.46     0.04
 46   3.0608  32976.90     0.11   15247.38    -0.11
 47   3.0609  32975.72     0.07   15247.48     0.04
 48   3.0609  32974.54     0.03   15247.32    -0.08
 49   3.0609  32973.52     0.16   15247.22    -0.13
 50   3.1481  29588.17    -0.09   15465.50     0.03
 51   3.1481  29586.83    -0.12   15465.60    -0.06
 52   3.1482  29585.67     0.03   15465.82    -0.02
 53   3.1482  29584.35     0.02   15466.01    -0.01
 54   3.1754  28445.20    -0.08   15666.06    -0.01
 55   3.1754  28443.83    -0.07   15666.27    -0.07
 56   3.1755  28442.45    -0.09   15666.53    -0.08
 57   3.1755  28441.08    -0.09   15666.98     0.11
 58   3.2437  25862.88    -0.14   16416.43    -0.08
 59   3.2438  25862.14     0.08   16416.91     0.03
 60   3.2438  25861.25     0.15   16417.29     0.04
 61   3.2438  25860.10    -0.04   16417.66     0.04
 62   3.9290  45799.09     0.07   20734.79    -0.14
 63   4.0438  44548.32     0.06   20186.03     0.07
 64   4.0438  44547.35     0.01   20185.95     0.06
 65   4.0439  44546.54     0.11   20185.89     0.07
 66   4.0439  44545.64     0.12   20185.86     0.10
 67   4.1502  40633.67    -0.06   20407.87     0.00
 68   4.2016  38502.99     0.00   20820.64     0.00
 69   4.2017  38496.76    -0.42   20822.12     0.12

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.

15DV224    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        56.794    56.837    56.751
ecceobj         0.612     0.612     0.611
incobj         29.447    29.446    29.447
qmin           21.640    19.683    21.680
qmax           93.204    96.419    92.922
amean          56.351    56.303    55.860
amin           55.652    54.161    53.943
amax           57.667    58.226    57.571
emean           0.607     0.631     0.604
emin            0.599     0.593     0.589
emax            0.616     0.656     0.614
imean          29.933    27.309    30.110
imin           29.752    25.529    29.774
imax           30.147    30.426    30.728
excite_mean     0.786     0.781     0.785
fracstop        0.018     0.155     0.021
cjmean          2.428     2.415     2.427

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       282.6     304.3     283.3
kozaiamp          4.8     179.9       5.7