Orbit Fit and Astrometric record for 15VU166

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: 15VU166   
# Created Wed Feb 20 02:10:39 2019
# Orbit generated from Bernstein formalism
# Fitting   31 observations of   31
# Arc:   2.27y
# First observation: 2015/09/07
#  Last observation: 2017/12/13
Preliminary a, adot, b, bdot, g, gdot:
  -0.000069   0.018594  -0.000002   0.001060   0.021291   0.000000
# Chi-squared of fit:     7.14 DOF:   56 RMS:  0.08
# Min/Max residuals:    -0.16    0.23
# Exact a, adot, b, bdot, g, gdot:
  1.326195E-05  1.843051E-02  8.125799E-07  1.050036E-03  2.120047E-02  2.447800E-04
# Covariance matrix:
  1.9491E-13  8.2575E-15 -9.6981E-16  1.0033E-14  1.7006E-13  5.6342E-12
  8.2575E-15  3.5717E-13 -5.6633E-15  3.1192E-14  2.6651E-13  1.7422E-11
 -9.6981E-16 -5.6633E-15  1.0797E-13 -8.6003E-14 -4.7045E-15 -4.4325E-13
  1.0033E-14  3.1192E-14 -8.6003E-14  1.2285E-13  3.2009E-14  2.3304E-12
  1.7006E-13  2.6651E-13 -4.7045E-15  3.2009E-14  3.8311E-13  1.7918E-11
  5.6342E-12  1.7422E-11 -4.4325E-13  2.3304E-12  1.7918E-11  1.3009E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.494149   53.085394    0.940932   -0.009499   -0.369852  2457273.121609
# Heliocentric elements and errors
Epoch:              2457270.5000  =  2015/09/05
Mean Anomaly:          186.31124 +/-     1.134
Argument of Peri:      150.03628 +/-     1.139
Long of Asc Node:       76.56687 +/-     0.007
Inclination:             3.55531 +/-     0.001
Eccentricity:         0.08898790 +/-    0.0002
Semi-Major Axis:     43.67830408 +/-    0.0027
Time of Perihelion: 2508141.0336 +/-     332.2
Perihelion:          39.79146369 +/-    0.0101
Aphelion:            47.56514447 +/-    0.0103
Period (y)              288.6735 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           29.29151050 +/-    0.0008
Ecliptic Y           37.43050012 +/-    0.0011
Ecliptic Z           -1.22987284 +/-    0.0000
Ecliptic XDOT        -0.00188376 +/-    0.0000
Ecliptic YDOT         0.00145124 +/-    0.0000
Ecliptic ZDOT         0.00013479 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   47.54521547 +/-    0.0010
Geocenter to KBO     47.16876967 +/-    0.0014
# Hcoef:  7.92

The following table shows the complete astrometric record for 15VU166. 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 (15VU166) followed by the observatory code and reference code for the source of the astrometry.

2015 09  07.62082  03 24 20.115  +17 05 52.17  24.7w 15VU166   568  C~2lVg      
2015 09  12.48448  03 24 13.420  +17 05 21.37  24.7w 15VU166   568  C~2lVg      
2015 10  07.52687  03 23 11.145  +17 01 06.39  24.9w 15VU166   568  C~2lVg      
2015 10  07.58621  03 23 10.944  +17 01 05.66  25.1w 15VU166   568  C~2lVg      
2015 10  09.56611  03 23 04.268  +17 00 39.54  24.4w 15VU166   568  C~2lVg      
2015 11  06.33883  03 21 12.690  +16 53 36.83  24.4r 15VU166   568  C~2lVg      
2015 11  06.40946  03 21 12.373  +16 53 35.67  24.7r 15VU166   568  C~2lVg      
2015 11  06.47899  03 21 12.064  +16 53 34.44  24.5r 15VU166   568  C~2lVg      
2015 11  07.49597  03 21 07.547  +16 53 17.78  24.6w 15VU166   568  C~2lVg      
2015 11  17.47779  03 20 22.856  +16 50 34.23  24.7w 15VU166   568  C~2lVg      
2015 11  17.56554  03 20 22.451  +16 50 32.71  24.2w 15VU166   568  C~2lVg      
2015 12  06.34344  03 19 00.758  +16 45 42.19  24.7w 15VU166   568  C~2lVg      
2015 12  06.48092  03 19 00.184  +16 45 40.23  24.4w 15VU166   568  C~2lVg      
2015 12  31.36453  03 17 32.250  +16 40 47.31  24.7w 15VU166   568  C~2lVg      
2016 01  07.39390  03 17 14.225  +16 39 53.47  24.5w 15VU166   568  C~2lVg      
2016 02  11.24684  03 16 43.825  +16 39 23.05  24.8w 15VU166   568  C~2lVg      
2016 09  07.57941  03 28 32.290  +17 24 56.71  24.9w 15VU166   568  C~2lVg      
2016 09  27.51468  03 27 53.663  +17 22 16.81  25.0w 15VU166   568  C~2lVg      
2016 09  29.49059  03 27 48.263  +17 21 55.71  24.8w 15VU166   568  C~2lVg      
2016 10  05.49370  03 27 30.244  +17 20 45.81  25.0w 15VU166   568  C~2lVg      
2016 10  07.49825  03 27 23.732  +17 20 20.95  25.0w 15VU166   568  C~2lVg      
2016 10  07.59395  03 27 23.406  +17 20 19.67  25.0w 15VU166   568  C~2lVg      
2016 10  09.49835  03 27 17.012  +17 19 55.73  24.7w 15VU166   568  C~2lVg      
2016 10  09.57103  03 27 16.756  +17 19 54.57  24.9w 15VU166   568  C~2lVg      
2016 11  02.49681  03 25 41.961  +17 14 03.81  24.7w 15VU166   568  C~2lVg      
2016 11  04.47292  03 25 33.287  +17 13 32.51  24.6w 15VU166   568  C~2lVg      
2016 12  28.46047  03 21 51.844  +17 00 53.95  25.0w 15VU166   568  C~2lVg      
2016 12  29.39076  03 21 49.073  +17 00 45.22  24.9w 15VU166   568  C~2lVg      
2017 01  27.29772  03 20 54.445  +16 58 25.80  24.8w 15VU166   568  C~2lVg      
2017 12  13.38599  03 27 00.511  +17 23 13.36  24.9w 15VU166   568  C~2lVg      
2017 12  13.42326  03 27 00.343  +17 23 13.04  25.0w 15VU166   568  C~2lVg      

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     0.10       0.00    -0.01
  2   0.0133   -100.64     0.08      -5.82    -0.06
  3   0.0819  -1029.11     0.01     -28.73    -0.06
  4   0.0820  -1032.08     0.02     -28.71    -0.02
  5   0.0875  -1131.33    -0.04     -29.91    -0.02
  6   0.1635  -2787.29    -0.07     -34.39     0.09
  7   0.1637  -2791.99    -0.07     -34.36     0.08
  8   0.1639  -2796.59    -0.04     -34.42    -0.03
  9   0.1667  -2863.54    -0.13     -34.08    -0.01
 10   0.1940  -3525.73     0.03     -29.05    -0.03
 11   0.1942  -3531.74    -0.08     -29.04    -0.08
 12   0.2456  -4740.60     0.07      -9.98     0.11
 13   0.2460  -4749.08     0.11      -9.76     0.12
 14   0.3142  -6046.05    -0.06      32.38    -0.06
 15   0.3334  -6310.41     0.09      47.32     0.04
 16   0.4288  -6740.67     0.01     131.12    -0.02
 17   1.0019   3783.61    -0.04     215.54    -0.04
 18   1.0565   3208.21    -0.10     196.03     0.01
 19   1.0619   3128.07     0.09     194.56     0.08
 20   1.0784   2860.77    -0.03     190.21    -0.13
 21   1.0839   2764.26    -0.03     189.06    -0.10
 22   1.0841   2759.42    -0.08     188.97    -0.16
 23   1.0893   2664.77     0.17     188.30     0.23
 24   1.0895   2660.94     0.09     188.08     0.03
 25   1.1550   1258.51    -0.02     183.93    -0.05
 26   1.1604   1130.35    -0.08     184.48     0.04
 27   1.3083  -2132.98    -0.15     246.11     0.08
 28   1.3108  -2173.65     0.10     247.72    -0.11
 29   1.3899  -2967.15     0.04     311.64     0.07
 30   2.2663   2484.50     0.12     438.08    -0.11
 31   2.2664   2482.09    -0.10     438.36     0.11

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.

15VU166    quality flag:2

Type:         7:4EEE CLASSICAL    7:4EEE

axisobj        44.055    44.066    44.046
ecceobj         0.080     0.080     0.080
incobj          3.548     3.548     3.549
qmin           39.355    39.397    39.226
qmax           48.392    48.385    48.526
amean          43.726    43.722    43.726
amin           43.350    43.337    43.339
amax           44.128    44.142    44.139
emean           0.086     0.074     0.087
emin            0.074     0.053     0.074
emax            0.097     0.096     0.100
imean           1.921     1.706     2.003
imin            1.119     0.801     1.156
imax            2.671     2.452     2.859
excite_mean     0.092     0.080     0.094
fracstop        1.000     1.000     1.000
cjmean          3.088     3.090     3.087

libcent 0       177.6    -180.0     177.3
libamp  0       133.3    -180.0     108.3
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       202.0     199.2     183.1
kozaiamp        179.9     180.0     180.0