Orbit Fit and Astrometric record for 15VO165

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: 15VO165   
# Created Tue Feb 19 02:10:39 2019
# Orbit generated from Bernstein formalism
# Fitting   32 observations of   32
# Arc:   3.08y
# First observation: 2014/11/17
#  Last observation: 2017/12/16
Preliminary a, adot, b, bdot, g, gdot:
  -0.000240   0.033565  -0.000042   0.005806   0.030112   0.000000
# Chi-squared of fit:     3.03 DOF:   58 RMS:  0.05
# Min/Max residuals:    -0.09    0.17
# Exact a, adot, b, bdot, g, gdot:
  1.776222E-05  3.334661E-02  3.308242E-06  5.777508E-03  3.004604E-02 -5.793765E-03
# Covariance matrix:
  3.2329E-13 -4.0666E-13  2.6231E-14 -5.3788E-14 -1.5685E-13 -3.3866E-12
 -4.0666E-13  7.1041E-13 -5.5405E-14  1.1406E-13  2.9044E-13  7.1742E-12
  2.6231E-14 -5.5405E-14  1.8337E-13 -1.2091E-13 -2.4248E-14 -6.4825E-13
 -5.3788E-14  1.1406E-13 -1.2091E-13  1.1368E-13  4.8686E-14  1.3381E-12
 -1.5685E-13  2.9044E-13 -2.4248E-14  4.8686E-14  2.3836E-13  3.0823E-12
 -3.3866E-12  7.1742E-12 -6.4825E-13  1.3381E-12  3.0823E-12  8.4103E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.940246   47.496251   -0.122132   -0.033087   -0.981335  2456978.901288
# Heliocentric elements and errors
Epoch:              2456970.5000  =  2014/11/09
Mean Anomaly:          318.45709 +/-     0.020
Argument of Peri:       50.36154 +/-     0.043
Long of Asc Node:       58.44405 +/-     0.000
Inclination:            10.01513 +/-     0.001
Eccentricity:         0.21304485 +/-    0.0003
Semi-Major Axis:     39.56845414 +/-    0.0050
Time of Perihelion: 2467461.4897 +/-       4.6
Perihelion:          31.13859868 +/-    0.0110
Aphelion:            47.99830959 +/-    0.0119
Period (y)              248.9040 +/-      0.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           23.04415394 +/-    0.0004
Ecliptic Y           25.33060122 +/-    0.0004
Ecliptic Z           -1.12675897 +/-    0.0000
Ecliptic XDOT        -0.00258888 +/-    0.0000
Ecliptic YDOT         0.00167218 +/-    0.0000
Ecliptic ZDOT         0.00054413 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   34.26283664 +/-    0.0004
Geocenter to KBO     33.28225725 +/-    0.0005
# Hcoef:  8.74

The following table shows the complete astrometric record for 15VO165. 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 (15VO165) followed by the observatory code and reference code for the source of the astrometry.

2014 11  17.40051  03 02 23.345  +15 11 24.48  23.9r 15VO165   568  C~2lVb      
2014 11  17.51464  03 02 22.666  +15 11 22.10  23.9r 15VO165   568  C~2lVb      
2014 11  19.30670  03 02 12.125  +15 10 44.97  23.9r 15VO165   568  C~2lVb      
2014 11  23.41007  03 01 48.187  +15 09 21.52  24.2r 15VO165   568  C~2lVb      
2015 08  11.59273  03 15 09.263  +16 21 28.54  24.1w 15VO165   568  C~2lVb      
2015 09  12.51312  03 14 56.749  +16 20 52.75  24.1w 15VO165   568  C~2lVb      
2015 10  07.43992  03 13 30.983  +16 15 42.96  23.7w 15VO165   568  C~2lVb      
2015 10  07.44703  03 13 30.944  +16 15 42.87  24.0w 15VO165   568  C~2lVb      
2015 10  08.45165  03 13 26.324  +16 15 26.28  24.2w 15VO165   568  C~2lVb      
2015 10  08.51072  03 13 26.054  +16 15 25.30  24.2w 15VO165   568  C~2lVb      
2015 11  07.35903  03 10 42.786  +16 05 47.29  23.9r 15VO165   568  C~2lVb      
2015 11  07.40112  03 10 42.530  +16 05 46.33  24.0r 15VO165   568  C~2lVb      
2015 11  07.44330  03 10 42.275  +16 05 45.44  24.0r 15VO165   568  C~2lVb      
2015 11  10.52886  03 10 23.697  +16 04 41.23  24.0w 15VO165   568  C~2lVb      
2015 11  17.37547  03 09 42.459  +16 02 19.67  24.1w 15VO165   568  C~2lVb      
2015 11  17.42215  03 09 42.175  +16 02 18.72  24.1w 15VO165   568  C~2lVb      
2015 12  06.38432  03 07 52.977  +15 56 17.70  24.2w 15VO165   568  C~2lVb      
2015 12  13.31874  03 07 17.110  +15 54 25.58  24.3w 15VO165   568  C~2lVb      
2016 01  01.37186  03 05 57.446  +15 50 43.40  24.2w 15VO165   568  C~2lVb      
2016 01  07.31862  03 05 39.551  +15 50 04.59  24.2w 15VO165   568  C~2lVb      
2016 02  04.29505  03 05 09.422  +15 50 52.52  24.4w 15VO165   568  C~2lVb      
2016 02  04.30157  03 05 09.433  +15 50 52.45  24.2w 15VO165   568  C~2lVb      
2016 02  10.28486  03 05 15.237  +15 51 53.54  24.3w 15VO165   568  C~2lVb      
2016 09  07.62568  03 22 26.389  +17 10 16.65        15VO165   568  C~2lVb      
2016 09  26.58416  03 21 37.358  +17 07 38.56  24.1w 15VO165   568  C~2lVb      
2016 10  09.54522  03 20 43.610  +17 04 39.69  24.2w 15VO165   568  C~2lVb      
2016 10  09.61729  03 20 43.261  +17 04 38.50  24.2w 15VO165   568  C~2lVb      
2017 01  02.39822  03 13 09.825  +16 40 49.09        15VO165   568  C~2lVb      
2017 01  02.41556  03 13 09.758  +16 40 49.01  24.3w 15VO165   568  C~2lVb      
2017 01  26.32220  03 12 21.437  +16 39 49.63  24.3w 15VO165   568  C~2lVb      
2017 01  26.32908  03 12 21.430  +16 39 49.64  24.3w 15VO165   568  C~2lVb      
2017 12  16.36856  03 21 52.061  +17 34 07.40  23.4w 15VO165   568  C~2lVb      

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    -0.04       0.00    -0.06
  2   0.0003    -10.10     0.05       0.45    -0.07
  3   0.0052   -167.00     0.05       7.30    -0.01
  4   0.0165   -523.09    -0.06      23.82    -0.03
  5   0.7315  11794.62    -0.07    1048.10     0.10
  6   0.8189  11610.85    -0.07    1061.13    -0.02
  7   0.8872  10334.54     0.09    1089.47    -0.02
  8   0.8872  10333.97     0.02    1089.53     0.02
  9   0.8899  10265.25    -0.08    1091.22     0.05
 10   0.8901  10261.24     0.06    1091.31     0.01
 11   0.9718   7835.56     0.07    1163.30     0.09
 12   0.9719   7831.75     0.05    1163.36    -0.00
 13   0.9721   7827.96     0.08    1163.50    -0.03
 14   0.9805   7552.42    -0.07    1173.73     0.09
 15   0.9992   6941.07    -0.03    1197.77    -0.02
 16   0.9994   6936.87    -0.01    1197.96    -0.03
 17   1.0513   5321.91    -0.05    1277.50     0.05
 18   1.0703   4793.26    -0.03    1310.65    -0.05
 19   1.1224   3626.45     0.05    1411.52     0.03
 20   1.1387   3367.41    -0.05    1445.12    -0.06
 21   1.2153   2962.51     0.01    1610.81     0.17
 22   1.2153   2962.64     0.08    1610.70     0.02
 23   1.2317   3059.99    -0.03    1646.38     0.03
 24   1.8076  18655.87     0.03    2252.34    -0.01
 25   1.8595  17930.34     0.00    2278.79    -0.09
 26   1.8950  17133.92     0.03    2303.28    -0.02
 27   1.8952  17128.75    -0.03    2303.41    -0.05
 28   2.1273  10442.31     0.00    2624.40    -0.07
 29   2.1274  10441.36    -0.09    2624.58     0.02
 30   2.1928   9754.65     0.03    2752.37    -0.05
 31   2.1928   9754.55     0.00    2752.40    -0.05
 32   3.0800  18545.87     0.01    3767.51     0.07

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.

15VO165    quality flag:3

Type:           3:2E      3:2E      3:2E

axisobj        39.825    39.835    39.816
ecceobj         0.213     0.213     0.212
incobj          9.994     9.994     9.994
qmin           28.875    28.947    28.980
qmax           50.524    50.466    50.412
amean          39.455    39.455    39.455
amin           39.042    39.044    39.052
amax           39.934    39.929    39.928
emean           0.229     0.229     0.229
emin            0.198     0.199     0.198
emax            0.266     0.265     0.264
imean           7.159     7.281     7.180
imin            3.759     4.135     4.719
imax            9.074     9.074     9.074
excite_mean     0.263     0.263     0.262
fracstop        1.000     1.000     1.000
cjmean          2.973     2.973     2.974

libcent 0       181.0     180.2     180.7
libamp  0        62.3      65.2      58.1
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       138.5     143.4     132.4
kozaiamp        179.9     179.9     180.0