Orbit Fit and Astrometric record for 15VU164

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: 15VU164   
# Created Sun Apr 21 01:10:12 2019
# Orbit generated from Bernstein formalism
# Fitting   30 observations of   30
# Arc:   2.32y
# First observation: 2015/08/20
#  Last observation: 2017/12/13
Preliminary a, adot, b, bdot, g, gdot:
  -0.000165   0.020451  -0.000021  -0.015715   0.025752   0.000000
# Chi-squared of fit:     3.46 DOF:   54 RMS:  0.06
# Min/Max residuals:    -0.21    0.13
# Exact a, adot, b, bdot, g, gdot:
  1.229011E-05  2.021247E-02 -9.701523E-06 -1.558526E-02  2.560212E-02  4.111502E-03
# Covariance matrix:
  2.0983E-13 -8.1898E-15  1.9719E-14 -7.6620E-14  1.5131E-13  2.2983E-12
 -8.1898E-15  1.9235E-13  4.0914E-14 -1.6080E-13  1.3528E-13  4.7698E-12
  1.9719E-14  4.0914E-14  1.1878E-13 -1.3636E-13  4.9343E-14  1.9641E-12
 -7.6620E-14 -1.6080E-13 -1.3636E-13  3.5141E-13 -1.9306E-13 -7.7267E-12
  1.5131E-13  1.3528E-13  4.9343E-14 -1.9306E-13  2.4772E-13  5.7518E-12
  2.2983E-12  4.7698E-12  1.9641E-12 -7.7267E-12  5.7518E-12  2.2898E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.044037   53.345389    1.012355    0.000081   -0.067377  2457255.068249
# Heliocentric elements and errors
Epoch:              2457250.5000  =  2015/08/16
Mean Anomaly:           78.43922 +/-     0.078
Argument of Peri:       85.89133 +/-     0.033
Long of Asc Node:      231.80967 +/-     0.000
Inclination:            37.52952 +/-     0.001
Eccentricity:         0.13698585 +/-    0.0006
Semi-Major Axis:     39.48717943 +/-    0.0071
Time of Perihelion: 2437502.9434 +/-      18.8
Perihelion:          34.07799466 +/-    0.0237
Aphelion:            44.89636420 +/-    0.0243
Period (y)              248.1375 +/-      0.07
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           24.16643740 +/-    0.0005
Ecliptic Y           30.78469927 +/-    0.0006
Ecliptic Z           -0.03037745 +/-    0.0000
Ecliptic XDOT        -0.00147433 +/-    0.0000
Ecliptic YDOT         0.00163572 +/-    0.0000
Ecliptic ZDOT        -0.00166695 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   39.13713490 +/-    0.0006
Geocenter to KBO     39.05926966 +/-    0.0008
# Hcoef:  7.68

The following table shows the complete astrometric record for 15VU164. 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 (15VU164) followed by the observatory code and reference code for the source of the astrometry.

2015 08  20.56746  03 23 52.091  +18 34 00.68  23.7w 15VU164   568  C~2lVY      
2015 09  07.61267  03 23 43.810  +18 30 43.79  23.8w 15VU164   568  C~2lVY      
2015 09  12.46374  03 23 35.995  +18 29 29.78  23.4w 15VU164   568  C~2lVY      
2015 10  07.51519  03 22 21.530  +18 20 59.21  23.7w 15VU164   568  C~2lVY      
2015 10  07.57457  03 22 21.290  +18 20 57.76  23.7w 15VU164   568  C~2lVY      
2015 10  09.55447  03 22 13.264  +18 20 09.22  23.7w 15VU164   568  C~2lVY      
2015 11  06.32832  03 19 58.684  +18 07 23.78  23.6r 15VU164   568  C~2lVY      
2015 11  06.39169  03 19 58.342  +18 07 21.90  23.6r 15VU164   568  C~2lVY      
2015 11  06.46246  03 19 57.959  +18 07 19.83  23.5r 15VU164   568  C~2lVY      
2015 11  07.48432  03 19 52.490  +18 06 49.79  23.7w 15VU164   568  C~2lVY      
2015 11  17.46555  03 18 58.612  +18 01 53.01  23.6w 15VU164   568  C~2lVY      
2015 11  17.55383  03 18 58.116  +18 01 50.10  23.6w 15VU164   568  C~2lVY      
2015 12  31.35875  03 15 34.870  +17 42 15.13  23.7w 15VU164   568  C~2lVY      
2016 01  07.38812  03 15 13.847  +17 39 52.43  23.9w 15VU164   568  C~2lVY      
2016 01  07.42286  03 15 13.743  +17 39 51.72  24.0w 15VU164   568  C~2lVY      
2016 01  08.24465  03 15 11.595  +17 39 36.25  23.8w 15VU164   568  C~2lVY      
2016 02  04.37827  03 14 38.189  +17 33 35.86  23.5w 15VU164   568  C~2lVY      
2016 02  11.24103  03 14 42.074  +17 32 53.72  23.9w 15VU164   568  C~2lVY      
2016 09  07.59099  03 29 22.960  +17 55 39.35  23.8w 15VU164   568  C~2lVY      
2016 10  09.58259  03 27 54.166  +17 44 46.11        15VU164   568  C~2lVY      
2016 11  02.49681  03 26 01.021  +17 33 57.06        15VU164   568  C~2lVY      
2016 11  04.47292  03 25 50.645  +17 33 00.17        15VU164   568  C~2lVY      
2016 12  28.46047  03 21 26.465  +17 08 55.22  23.7w 15VU164   568  C~2lVY      
2016 12  29.39076  03 21 23.175  +17 08 35.62  23.7w 15VU164   568  C~2lVY      
2017 01  27.29772  03 20 20.031  +17 01 08.08  23.7w 15VU164   568  C~2lVY      
2017 01  27.30287  03 20 20.025  +17 01 07.97  23.8w 15VU164   568  C~2lVY      
2017 09  16.62789  03 34 43.936  +17 17 53.11  23.6w 15VU164   568  C~2lVY      
2017 09  23.56691  03 34 27.604  +17 15 35.57  23.8w 15VU164   568  C~2lVY      
2017 12  13.39528  03 28 10.531  +16 40 05.54  23.7w 15VU164   568  C~2lVY      
2017 12  13.43255  03 28 10.347  +16 40 04.69  23.7w 15VU164   568  C~2lVY      

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     0.02
  2   0.0494   -163.35    -0.02    -161.09     0.09
  3   0.0627   -289.53    -0.02    -204.86     0.07
  4   0.1313  -1443.69    -0.02    -432.27     0.05
  5   0.1314  -1447.36     0.01    -432.81     0.03
  6   0.1369  -1570.19     0.05    -450.91    -0.02
  7   0.2129  -3619.52    -0.03    -703.87    -0.11
  8   0.2131  -3624.72    -0.02    -704.45    -0.14
  9   0.2133  -3630.53     0.01    -705.05    -0.13
 10   0.2161  -3713.61     0.01    -714.16     0.00
 11   0.2434  -4532.66     0.03    -804.07     0.07
 12   0.2436  -4540.24    -0.21    -805.07    -0.14
 13   0.3636  -7650.11    -0.02   -1188.17    -0.02
 14   0.3828  -7977.90     0.13   -1247.38     0.03
 15   0.3829  -7979.52    -0.01   -1247.68     0.02
 16   0.3852  -8013.26     0.02   -1254.58     0.04
 17   0.4594  -8569.60    -0.02   -1477.38     0.09
 18   0.4782  -8526.98     0.01   -1532.67    -0.03
 19   1.0514   4000.39     0.02   -3394.29     0.04
 20   1.1390   2610.85     0.07   -3718.08    -0.03
 21   1.2045    883.13     0.04   -3948.51    -0.01
 22   1.2099    725.24     0.01   -3966.85     0.01
 23   1.3577  -3299.81    -0.01   -4417.47     0.10
 24   1.3602  -3350.42     0.00   -4424.48    -0.01
 25   1.4394  -4340.49    -0.01   -4627.31     0.04
 26   1.4394  -4340.60    -0.05   -4627.39    -0.01
 27   2.0755   7917.91    -0.02   -6699.55     0.02
 28   2.0945   7657.63    -0.06   -6777.83     0.04
 29   2.3158   1887.27     0.05   -7540.84    -0.11
 30   2.3159   1884.50    -0.02   -7541.01    -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.

15VU164    quality flag:3

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

axisobj        39.819    39.842    39.797
ecceobj         0.142     0.143     0.141
incobj         37.400    37.400    37.400
qmin           30.911    31.683    30.317
qmax           48.526    47.743    49.034
amean          39.454    39.454    39.454
amin           39.065    39.034    39.081
amax           39.899    39.898    39.863
emean           0.177     0.167     0.185
emin            0.123     0.125     0.123
emax            0.218     0.198     0.232
imean          37.981    38.148    37.828
imin           37.357    37.634    37.088
imax           38.657    38.675    38.626
excite_mean     0.641     0.640     0.641
fracstop        1.000     1.000     1.000
cjmean          2.537     2.537     2.538

libcent 0       181.3     179.3     179.7
libamp  0        90.2     103.9      77.2
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       178.5     174.0     180.2
kozaiamp        180.0     180.0     180.0