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 Mon Jun 25 01:38:16 2018
# Orbit generated from Bernstein formalism
# Fitting   25 observations of   25
# Arc:   4.13y
# First observation: 2014/02/21
#  Last observation: 2018/04/10
Preliminary a, adot, b, bdot, g, gdot:
   0.001497   0.055708   0.001022   0.024552   0.040506   0.000000
# Chi-squared of fit:    15.96 DOF:   44 RMS:  0.14
# Min/Max residuals:    -0.41    0.25
# Exact a, adot, b, bdot, g, gdot:
  2.342978E-05  5.928309E-02  8.937291E-06  2.629272E-02  4.243276E-02  1.885023E-02
# Covariance matrix:
  4.1780E-13 -4.5846E-13  1.2332E-13 -1.8249E-13 -6.9183E-14 -1.6831E-12
 -4.5846E-13  1.0065E-12 -2.9825E-13  4.2270E-13  6.0104E-13  3.9030E-12
  1.2332E-13 -2.9825E-13  2.6617E-13 -2.2563E-13 -1.8324E-13 -1.2554E-12
 -1.8249E-13  4.2270E-13 -2.2563E-13  2.6768E-13  2.4690E-13  1.7899E-12
 -6.9183E-14  6.0104E-13 -1.8324E-13  2.4690E-13  6.6706E-13  2.2828E-12
 -1.6831E-12  3.9030E-12 -1.2554E-12  1.7899E-12  2.2828E-12  1.6524E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
  -19.195825  173.892262    0.357708   -0.302337   -0.868708  2456709.988748
# Heliocentric elements and errors
Epoch:              2456700.5000  =  2014/02/12
Mean Anomaly:            8.49302 +/-     0.002
Argument of Peri:      277.81044 +/-     0.007
Long of Asc Node:      209.29429 +/-     0.000
Inclination:            29.45617 +/-     0.000
Eccentricity:         0.61405992 +/-    0.0001
Semi-Major Axis:     57.12725022 +/-    0.0101
Time of Perihelion: 2452979.8130 +/-       0.4
Perihelion:          22.04769573 +/-    0.0057
Aphelion:            92.20680471 +/-    0.0167
Period (y)              431.7906 +/-      0.11
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -23.00801516 +/-    0.0004
Ecliptic Y            2.82319004 +/-    0.0000
Ecliptic Z           -7.74848169 +/-    0.0001
Ecliptic XDOT        -0.00210953 +/-    0.0000
Ecliptic YDOT        -0.00362470 +/-    0.0000
Ecliptic ZDOT         0.00120237 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   24.44132018 +/-    0.0004
Geocenter to KBO     23.56669681 +/-    0.0005
# Hcoef:  7.74

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 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      
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      
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    -0.28       0.00     0.18
  2   0.0000     -0.81     0.25      -0.28    -0.04
  3   0.0001     -2.28     0.12      -0.71    -0.41
  4   1.0047  11852.25    -0.08    5325.12     0.06
  5   1.0048  11850.97    -0.13    5325.10     0.08
  6   1.0048  11849.87     0.00    5325.10     0.10
  7   1.0048  11848.60    -0.03    5325.07     0.09
  8   1.1303   6702.11    -0.04    6064.47     0.04
  9   1.1304   6701.06     0.02    6064.87     0.10
 10   1.1304   6699.87    -0.06    6065.16     0.05
 11   1.1304   6698.91     0.11    6065.64     0.18
 12   1.1466   6111.30     0.07    6272.67     0.02
 13   1.1467   6110.25     0.07    6273.01    -0.03
 14   1.1467   6109.11    -0.01    6273.62     0.19
 15   1.1467   6108.18     0.12    6273.89     0.07
 16   1.1521   5923.01     0.09    6347.74     0.16
 17   1.1522   5922.04     0.13    6347.94    -0.03
 18   1.1522   5921.02     0.11    6348.18    -0.19
 19   1.1522   5919.93     0.03    6348.85     0.08
 20   1.2314   3960.18     0.03    7657.49    -0.01
 21   1.2315   3959.56    -0.11    7657.85    -0.23
 22   1.2315   3958.96    -0.24    7658.53    -0.14
 23   1.2315   3958.49    -0.23    7659.01    -0.24
 24   4.1306  41002.38     0.23   21070.19    -0.10
 25   4.1307  40996.13    -0.19   21071.69     0.02

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