Orbit Fit and Astrometric record for 15VX166

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: 15VX166   
# Created Fri Dec  3 02:13:38 2021
# Orbit generated from Bernstein formalism
# Fitting     30 observations of     31
# Arc:   2.04y
# First observation: 2015/09/07
#  Last observation: 2017/09/22
Preliminary a, adot, b, bdot, g, gdot:
  -0.000065   0.018245   0.000001   0.000966   0.021126   0.000000
# Chi-squared of fit:     8.26 DOF:     54 RMS:  0.09
# Min/Max residuals:    -0.30    0.32
# Exact a, adot, b, bdot, g, gdot:
  1.383145E-05  1.808164E-02  6.204084E-07  9.595631E-04  2.104223E-02 -1.021947E-03
# Covariance matrix:
  2.1888E-13 -5.9779E-14 -1.3359E-15  4.5134E-15  1.5299E-13  2.5945E-12
 -5.9779E-14  2.9892E-13 -3.3305E-15  1.4300E-14  1.3881E-13  8.3112E-12
 -1.3359E-15 -3.3305E-15  1.1399E-13 -9.5296E-14 -3.6307E-15 -1.7621E-13
  4.5134E-15  1.4300E-14 -9.5296E-14  1.3862E-13  1.4047E-14  7.4676E-13
  1.5299E-13  1.3881E-13 -3.6307E-15  1.4047E-14  2.7409E-13  8.1278E-12
  2.5945E-12  8.3112E-12 -1.7621E-13  7.4676E-13  8.1278E-12  4.3379E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.376098   52.122532    0.934524    0.002682   -0.385852  2457273.129809
# Heliocentric elements and errors
Epoch:              2457270.5000  =  2015/09/05
Mean Anomaly:          222.42717 +/-     0.386
Argument of Peri:      153.27190 +/-     0.381
Long of Asc Node:       44.05158 +/-     0.003
Inclination:             3.07705 +/-     0.001
Eccentricity:         0.12680557 +/-    0.0006
Semi-Major Axis:     43.56092217 +/-    0.0068
Time of Perihelion: 2497400.9665 +/-     112.4
Perihelion:          38.03715469 +/-    0.0268
Aphelion:            49.08468966 +/-    0.0272
Period (y)              287.5106 +/-      0.07
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           30.14805606 +/-    0.0007
Ecliptic Y           37.24126151 +/-    0.0009
Ecliptic Z            0.31198583 +/-    0.0000
Ecliptic XDOT        -0.00194101 +/-    0.0000
Ecliptic YDOT         0.00133245 +/-    0.0000
Ecliptic ZDOT         0.00012403 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   47.91569866 +/-    0.0009
Geocenter to KBO     47.52348644 +/-    0.0012
# Hcoef:  8.34

The following table shows the complete astrometric record for 15VX166. 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 (15VX166) followed by the observatory code and reference code for the source of the astrometry.

2015 09  07.62902  03 18 25.533  +18 39 44.65  25.4w 15VX166   568  C~2lVg      
2015 09  12.49264  03 18 18.245  +18 39 21.93  25.3w 15VX166   568  C~2lVg      
2015 10  07.53854  03 17 13.339  +18 35 38.89  25.7w 15VX166   568  C~2lVg      
2015 10  07.59790  03 17 13.124  +18 35 38.19  26.0w 15VX166   568  C~2lVg      
2015 10  09.57780  03 17 06.291  +18 35 13.70  25.4w 15VX166   568  C~2lVg      
2015 11  07.33264  03 15 08.874  +18 28 04.20  24.8r 15VX166   568  C~2lVg      
2015 11  07.37479  03 15 08.686  +18 28 03.61  25.1r 15VX166   568  C~2lVg      
2015 11  07.41697  03 15 08.492  +18 28 02.86  25.3r 15VX166   568  C~2lVg      
2015 11  10.49950  03 14 54.702  +18 27 11.40  25.8w 15VX166   568  C~2lVg      
2015 11  17.34635  03 14 23.956  +18 25 16.25  25.2w 15VX166   568  C~2lVg      
2015 11  17.39294  03 14 23.744  +18 25 15.51  25.6w 15VX166   568  C~2lVg      
2015 12  06.35508  03 13 01.708  +18 20 04.27  25.1w 15VX166   568  C~2lVg      
2015 12  06.49265  03 13 01.168  +18 20 02.22  24.9w 15VX166   568  C~2lVg      
2016 01  01.34294  03 11 32.419  +18 14 20.04  25.5w 15VX166   568  C~2lVg      
2016 01  07.40549  03 11 17.678  +18 13 22.37  25.8w 15VX166   568  C~2lVg      
2016 01  08.25043  03 11 15.852  +18 13 15.44  25.4w 15VX166   568  C~2lVg      
2016 02  10.30227  03 10 50.603  +18 11 37.56  25.1w 15VX166   568  C~2lVg      
2016 09  07.57363  03 22 34.996  +18 58 44.30  25.6w 15VX166   568  C~2lVg      
2016 09  27.51061  03 21 54.038  +18 56 33.52  25.4w 15VX166   568  C~2lVg      
2016 09  29.48481  03 21 48.438  +18 56 14.58  25.3w 15VX166   568  C~2lVg      
2016 10  05.48792  03 21 29.835  +18 55 11.23  25.3w 15VX166   568  C~2lVg      
2016 10  07.49247  03 21 23.142  +18 54 48.66  25.0w 15VX166   568  C~2lVg      
2016 10  07.58817  03 21 22.795  +18 54 47.12  25.2w 15VX166   568  C~2lVg      
2016 10  09.49252  03 21 16.231  +18 54 24.45  25.1w 15VX166   568  C~2lVg      
2016 10  09.56525  03 21 15.959  +18 54 23.55  25.5w 15VX166   568  C~2lVg      
2016 11  04.40663  03 19 31.217  +18 48 11.70  25.4w 15VX166   568  C~2lVg      
2017 01  02.40920  03 15 37.350  +18 33 42.45  25.8w 15VX166   568  C~2lVg      
2017 01  02.42780  03 15 37.294  +18 33 41.98  25.7w 15VX166   568  C~2lVg      
2017 01  27.27995  03 14 56.826  +18 31 06.21  25.1w 15VX166   568  C~2lVg      
2017 09  15.60695  03 26 34.884  +19 16 53.60  23.8w 15VX166   568  C~2lVg      
2017 09  22.59291  03 26 20.244  +19 16 08.50  25.5w 15VX166   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    -0.05       0.00     0.02
     2   0.0133   -105.93     0.02       4.76     0.02
     3   0.0819  -1054.83     0.05      27.96     0.04
     4   0.0821  -1057.97    -0.07      28.07     0.09
     5   0.0875  -1158.14    -0.03      29.63    -0.03
     6   0.1662  -2882.51     0.02      50.65    -0.07
     7   0.1663  -2885.25     0.09      50.78     0.02
     8   0.1664  -2888.11     0.03      50.78    -0.03
     9   0.1749  -3090.98     0.10      52.60    -0.09
    10   0.1936  -3543.50     0.02      56.49     0.04
    11   0.1937  -3546.61     0.03      56.57     0.08
    12   0.2457  -4755.62     0.00      64.78     0.02
    13   0.2460  -4763.58 (   0.44)     64.84 (   0.01)
    14   0.3168  -6073.98    -0.08      71.19     0.01
    15   0.3334  -6291.96    -0.08      71.72    -0.30
    16   0.3357  -6318.91    -0.02      71.99    -0.09
    17   0.4262  -6692.12    -0.02      73.96     0.21
    18   1.0019   3715.78    -0.09     198.98     0.02
    19   1.0565   3120.39    -0.10     219.20    -0.00
    20   1.0619   3038.71     0.05     220.98    -0.11
    21   1.0783   2767.26     0.05     226.58    -0.13
    22   1.0838   2669.65     0.20     228.85     0.32
    23   1.0841   2664.50    -0.10     228.61    -0.03
    24   1.0893   2568.63     0.02     230.32     0.01
    25   1.0895   2564.67    -0.13     230.43     0.04
    26   1.1602   1032.06    -0.01     250.18    -0.06
    27   1.3218  -2402.96     0.15     271.05     0.16
    28   1.3218  -2403.85    -0.01     270.80    -0.08
    29   1.3899  -3000.18    -0.07     271.27    -0.02
    30   2.0232   7282.24     0.02     406.29     0.02
    31   2.0423   7069.98     0.00     413.73    -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.

15VX166    quality flag:2

Type:         7:4EEE    7:4EEE  SCATNEAR

axisobj        43.913    43.930    43.897
ecceobj         0.117     0.119     0.116
incobj          3.062     3.062     3.062
qmin           37.580    37.541    37.451
qmax           50.425    50.453    50.590
amean          43.726    43.726    43.702
amin           43.284    43.281    43.275
amax           44.226    44.225    44.239
emean           0.125     0.128     0.108
emin            0.110     0.116     0.079
emax            0.141     0.141     0.144
imean           1.891     1.985     2.019
imin            0.804     1.025     0.755
imax            2.831     2.898     3.022
excite_mean     0.130     0.133     0.114
fracstop        1.000     1.000     1.000
cjmean          3.078     3.077     3.082

libcent 0       179.7     183.8    -180.0
libamp  0       154.8     137.2    -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       155.6     186.3     183.4
kozaiamp        180.0     180.0     180.0