Orbit Fit and Astrometric record for 15VM165

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: 15VM165   
# Created Sun Apr 21 01:10:12 2019
# Orbit generated from Bernstein formalism
# Fitting   33 observations of   33
# Arc:   2.25y
# First observation: 2015/09/12
#  Last observation: 2017/12/13
Preliminary a, adot, b, bdot, g, gdot:
  -0.000136   0.037494  -0.000011   0.004290   0.031435   0.000000
# Chi-squared of fit:    10.56 DOF:   60 RMS:  0.10
# Min/Max residuals:    -0.30    0.24
# Exact a, adot, b, bdot, g, gdot:
  1.862373E-05  3.699298E-02  2.452251E-06  4.231578E-03  3.123434E-02 -3.088044E-03
# Covariance matrix:
  1.9158E-13 -4.6975E-14  6.8853E-16  6.6228E-15  1.2446E-13  1.0085E-12
 -4.6975E-14  4.0682E-13 -9.2951E-15  5.0212E-14  1.7591E-13  6.9609E-12
  6.8853E-16 -9.2951E-15  1.0484E-13 -8.8027E-14 -3.3241E-15 -2.2634E-13
  6.6228E-15  5.0212E-14 -8.8027E-14  1.3117E-13  3.0639E-14  1.2283E-12
  1.2446E-13  1.7591E-13 -3.3241E-15  3.0639E-14  2.3151E-13  4.3583E-12
  1.0085E-12  6.9609E-12 -2.2634E-13  1.2283E-12  4.3583E-12  1.7033E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -3.268113   51.501176    0.893545   -0.026691   -0.469974  2457278.005699
# Heliocentric elements and errors
Epoch:              2457270.5000  =  2015/09/05
Mean Anomaly:          334.34270 +/-     0.054
Argument of Peri:       12.32949 +/-     0.091
Long of Asc Node:       76.31539 +/-     0.002
Inclination:             7.21374 +/-     0.000
Eccentricity:         0.20774553 +/-    0.0002
Semi-Major Axis:     39.45203780 +/-    0.0047
Time of Perihelion: 2463721.2623 +/-      13.4
Perihelion:          31.25605314 +/-    0.0103
Aphelion:            47.64802247 +/-    0.0112
Period (y)              247.8063 +/-      0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           20.88581840 +/-    0.0003
Ecliptic Y           24.82755937 +/-    0.0004
Ecliptic Z           -1.82509403 +/-    0.0000
Ecliptic XDOT        -0.00269464 +/-    0.0000
Ecliptic YDOT         0.00181715 +/-    0.0000
Ecliptic ZDOT         0.00038580 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   32.49547788 +/-    0.0004
Geocenter to KBO     32.01604321 +/-    0.0005
# Hcoef: 10.20

The following table shows the complete astrometric record for 15VM165. 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 (15VM165) followed by the observatory code and reference code for the source of the astrometry.

2015 09  12.50491  03 19 49.854  +14 58 51.50  25.2w 15VM165   568  C~2lVb      
2015 10  07.42821  03 18 25.582  +14 52 25.39  25.1w 15VM165   568  C~2lVb      
2015 10  08.44001  03 18 20.919  +14 52 06.18  25.3w 15VM165   568  C~2lVb      
2015 10  08.49908  03 18 20.637  +14 52 05.12  25.3w 15VM165   568  C~2lVb      
2015 11  07.34843  03 15 34.540  +14 41 21.77  25.3r 15VM165   568  C~2lVb      
2015 11  07.39058  03 15 34.300  +14 41 20.76  24.9r 15VM165   568  C~2lVb      
2015 11  07.43274  03 15 34.025  +14 41 19.83  24.7r 15VM165   568  C~2lVb      
2015 11  10.51713  03 15 14.961  +14 40 10.87  25.7w 15VM165   568  C~2lVb      
2015 11  10.54648  03 15 14.755  +14 40 10.40  25.2w 15VM165   568  C~2lVb      
2015 11  17.36382  03 14 32.480  +14 37 41.42  25.2w 15VM165   568  C~2lVb      
2015 11  17.41043  03 14 32.199  +14 37 40.43  25.3w 15VM165   568  C~2lVb      
2015 12  06.37266  03 12 39.160  +14 31 29.71  25.3w 15VM165   568  C~2lVb      
2015 12  13.30706  03 12 01.841  +14 29 39.21  25.2w 15VM165   568  C~2lVb      
2015 12  13.36559  03 12 01.545  +14 29 38.21  25.2w 15VM165   568  C~2lVb      
2016 01  01.36029  03 10 38.553  +14 26 13.22  25.4w 15VM165   568  C~2lVb      
2016 01  07.30705  03 10 19.710  +14 25 42.78  25.4w 15VM165   568  C~2lVb      
2016 02  11.22942  03 09 54.182  +14 28 55.93  25.4w 15VM165   568  C~2lVb      
2016 09  07.58521  03 28 13.006  +15 45 39.98  25.4w 15VM165   568  C~2lVb      
2016 09  25.60907  03 27 29.909  +15 42 15.45  25.9w 15VM165   568  C~2lVb      
2016 09  27.51883  03 27 23.280  +15 41 47.15  25.1w 15VM165   568  C~2lVb      
2016 09  29.49637  03 27 16.029  +15 41 16.80  26.4w 15VM165   568  C~2lVb      
2016 10  07.50403  03 26 42.771  +15 39 02.36  26.2w 15VM165   568  C~2lVb      
2016 10  09.50422  03 26 33.562  +15 38 26.04  25.2w 15VM165   568  C~2lVb      
2016 10  09.57681  03 26 33.226  +15 38 24.86  25.6w 15VM165   568  C~2lVb      
2016 10  10.54805  03 26 28.640  +15 38 06.78  25.4w 15VM165   568  C~2lVb      
2016 10  10.59680  03 26 28.400  +15 38 05.80  25.4w 15VM165   568  C~2lVb      
2016 11  04.46713  03 24 10.150  +15 29 38.20  25.2w 15VM165   568  C~2lVb      
2016 12  24.33677  03 19 22.506  +15 14 55.56  25.3w 15VM165   568  C~2lVb      
2016 12  28.44224  03 19 05.118  +15 14 16.35  25.7w 15VM165   568  C~2lVb      
2017 01  02.43952  03 18 46.171  +15 13 38.43  26.0w 15VM165   568  C~2lVb      
2017 01  26.34976  03 17 54.366  +15 13 24.34  25.0w 15VM165   568  C~2lVb      
2017 09  15.62132  03 36 22.935  +16 29 48.64  25.2w 15VM165   568  C~2lVb      
2017 12  13.36708  03 28 43.379  +16 04 16.70  25.5w 15VM165   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     0.02       0.00    -0.06
  2   0.0682  -1279.65    -0.09     -59.12    -0.30
  3   0.0710  -1349.92    -0.02     -60.24    -0.02
  4   0.0712  -1354.14    -0.02     -60.21     0.06
  5   0.1529  -3848.03    -0.07     -56.55     0.13
  6   0.1530  -3851.65     0.24     -56.62    -0.04
  7   0.1531  -3855.75     0.09     -56.47     0.01
  8   0.1616  -4140.89     0.06     -50.81    -0.21
  9   0.1616  -4143.90    -0.20     -50.49     0.05
 10   0.1803  -4775.32    -0.09     -33.75     0.05
 11   0.1804  -4779.51     0.09     -33.64     0.01
 12   0.2324  -6461.51    -0.10      40.36     0.02
 13   0.2513  -7013.96    -0.10      77.08     0.21
 14   0.2515  -7018.37     0.04      77.25     0.03
 15   0.3035  -8236.63     0.13     199.66     0.10
 16   0.3198  -8509.03     0.00     243.26    -0.13
 17   0.4154  -8815.42     0.02     528.58     0.01
 18   0.9886   7753.50    -0.07     886.97     0.01
 19   1.0379   7099.15    -0.07     842.63    -0.00
 20   1.0432   6999.28    -0.05     838.92    -0.06
 21   1.0486   6890.19     0.18     835.48    -0.02
 22   1.0705   6391.00     0.10     824.49     0.13
 23   1.0760   6252.99    -0.14     822.39     0.03
 24   1.0762   6248.00     0.06     822.46     0.13
 25   1.0788   6179.27     0.02     821.43    -0.05
 26   1.0790   6175.67    -0.03     821.34    -0.10
 27   1.1471   4113.19     0.15     829.66     0.06
 28   1.2836   -135.42    -0.09    1033.41     0.02
 29   1.2948   -388.69     0.01    1060.19     0.07
 30   1.3085   -663.44    -0.17    1094.11    -0.02
 31   1.3740  -1391.53     0.13    1273.94     0.08
 32   2.0099  15268.84     0.02    1749.90    -0.04
 33   2.2529   8454.71    -0.03    1862.04    -0.13

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.

15VM165    quality flag:3

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

axisobj        39.835    39.843    39.828
ecceobj         0.211     0.212     0.211
incobj          7.204     7.205     7.205
qmin           30.855    30.856    30.861
qmax           48.403    48.459    48.392
amean          39.455    39.455    39.455
amin           39.065    39.075    39.082
amax           39.902    39.905    39.856
emean           0.198     0.198     0.198
emin            0.180     0.179     0.180
emax            0.216     0.216     0.216
imean           6.058     6.054     6.061
imin            5.502     5.499     5.501
imax            6.921     6.906     6.927
excite_mean     0.225     0.225     0.225
fracstop        1.000     1.000     1.000
cjmean          2.995     2.995     2.995

libcent 0       178.8     180.4     180.4
libamp  0        51.8      54.4      49.1
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       180.5     181.2     180.7
kozaiamp        180.0     180.0     180.0