Orbit Fit and Astrometric record for 15VC166

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: 15VC166   
# Created Fri Mar 29 01:18:26 2024
# Orbit generated from Bernstein formalism
# Fitting     24 observations of     24
# Arc:   2.02y
# First observation: 2015/09/12
#  Last observation: 2017/09/20
Preliminary a, adot, b, bdot, g, gdot:
  -0.000064   0.030943   0.000001   0.001571   0.027280   0.000000
# Chi-squared of fit:    13.08 DOF:     42 RMS:  0.13
# Min/Max residuals:    -0.62    0.22
# Exact a, adot, b, bdot, g, gdot:
  1.831327E-05  3.061958E-02  5.454438E-07  1.556969E-03  2.705858E-02 -2.189687E-03
# Covariance matrix:
  2.7553E-13 -8.5031E-14 -8.2216E-16  3.7862E-15  2.1292E-13  1.3784E-12
 -8.5031E-14  5.6796E-13 -5.5666E-15  2.7432E-14  2.1563E-13  9.8955E-12
 -8.2216E-16 -5.5666E-15  1.3075E-13 -1.0626E-13 -3.6877E-15 -1.3779E-13
  3.7862E-15  2.7432E-14 -1.0626E-13  1.6032E-13  1.7800E-14  6.7741E-13
  2.1292E-13  2.1563E-13 -3.6877E-15  1.7800E-14  3.9714E-13  6.4387E-12
  1.3784E-12  9.8955E-12 -1.3779E-13  6.7741E-13  6.4387E-12  2.4444E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.015207   51.918618    0.897052    0.000267   -0.464022  2457277.993429
# Heliocentric elements and errors
Epoch:              2457270.5000  =  2015/09/05
Mean Anomaly:          342.29578 +/-     0.074
Argument of Peri:       29.59484 +/-     0.131
Long of Asc Node:       50.25471 +/-     0.000
Inclination:             2.92063 +/-     0.001
Eccentricity:         0.24115735 +/-    0.0003
Semi-Major Axis:     48.09759463 +/-    0.0087
Time of Perihelion: 2463262.3057 +/-      25.1
Perihelion:          36.49850620 +/-    0.0155
Aphelion:            59.69668305 +/-    0.0177
Period (y)              333.5748 +/-      0.09
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           23.78243891 +/-    0.0005
Ecliptic Y           28.90176822 +/-    0.0007
Ecliptic Z            0.00984177 +/-    0.0000
Ecliptic XDOT        -0.00257718 +/-    0.0000
Ecliptic YDOT         0.00173002 +/-    0.0000
Ecliptic ZDOT         0.00015753 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   37.42882183 +/-    0.0006
Geocenter to KBO     36.95685618 +/-    0.0009
# Hcoef:  8.99

The following table shows the complete astrometric record for 15VC166. 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 (15VC166) followed by the observatory code and reference code for the source of the astrometry.

2015 09  12.49264  03 17 59.251  +18 15 40.01  24.9w 15VC166   568  C~2lVd      
2015 10  07.53854  03 16 42.843  +18 11 11.44  25.0w 15VC166   568  C~2lVd      
2015 10  07.59790  03 16 42.602  +18 11 10.49  25.1w 15VC166   568  C~2lVd      
2015 10  09.57780  03 16 34.362  +18 10 40.74  25.0w 15VC166   568  C~2lVd      
2015 11  07.33264  03 14 11.487  +18 01 55.34  24.7r 15VC166   568  C~2lVd      
2015 11  07.37479  03 14 11.251  +18 01 54.51  24.5r 15VC166   568  C~2lVd      
2015 11  07.41697  03 14 11.013  +18 01 53.76  24.8r 15VC166   568  C~2lVd      
2015 11  10.49950  03 13 54.153  +18 00 50.81  24.7w 15VC166   568  C~2lVd      
2015 11  17.34635  03 13 16.616  +17 58 30.52  24.9w 15VC166   568  C~2lVd      
2015 11  17.39294  03 13 16.358  +17 58 29.48  25.0w 15VC166   568  C~2lVd      
2015 12  06.35508  03 11 36.508  +17 52 14.20  24.9w 15VC166   568  C~2lVd      
2015 12  06.49265  03 11 35.774  +17 52 11.37  25.2w 15VC166   568  C~2lVd      
2016 01  08.25043  03 09 30.892  +17 44 23.82  24.8w 15VC166   568  C~2lVd      
2016 09  07.57363  03 25 09.892  +18 47 53.73        15VC166   568  C~2lVd      
2016 09  27.51061  03 24 24.078  +18 45 27.51  25.1w 15VC166   568  C~2lVd      
2016 10  05.48792  03 23 55.576  +18 43 51.46  24.8w 15VC166   568  C~2lVd      
2016 10  07.49247  03 23 47.583  +18 43 24.42  23.8w 15VC166   568  C~2lVd      
2016 10  09.49252  03 23 39.377  +18 42 56.15  25.2w 15VC166   568  C~2lVd      
2016 10  09.56525  03 23 39.060  +18 42 54.88  24.7w 15VC166   568  C~2lVd      
2016 11  02.50259  03 21 42.372  +18 36 07.17  25.0w 15VC166   568  C~2lVd      
2016 12  24.32550  03 17 18.582  +18 20 17.04  25.1w 15VC166   568  C~2lVd      
2017 01  02.42780  03 16 46.733  +18 18 21.96  25.2w 15VC166   568  C~2lVd      
2017 09  15.56413  03 32 05.963  +19 18 19.58        15VC166   568  C~2lVd      
2017 09  20.61305  03 31 54.924  +19 17 47.23        15VC166   568  C~2lVd      

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    -0.09       0.00     0.08
     2   0.0686  -1121.05     0.03      22.77     0.00
     3   0.0687  -1124.62     0.11      22.75    -0.09
     4   0.0742  -1245.74     0.05      24.57    -0.08
     5   0.1529  -3349.54     0.10      50.74     0.02
     6   0.1530  -3353.01     0.07      50.82     0.05
     7   0.1531  -3356.48     0.04      50.99     0.16
     8   0.1616  -3605.13    -0.03      53.65     0.00
     9   0.1803  -4158.88     0.17      59.78     0.05
    10   0.1804  -4162.71     0.17      59.75    -0.04
    11   0.2323  -5637.10     0.05      76.46    -0.02
    12   0.2327  -5647.96    -0.62      76.53    -0.09
    13   0.3224  -7493.41     0.00     104.16    -0.09
    14   0.9886   6416.92    -0.04     317.60    -0.01
    15   1.0432   5749.80    -0.12     338.16    -0.10
    16   1.0650   5333.49     0.06     346.40    -0.01
    17   1.0705   5216.71    -0.33     348.66     0.22
    18   1.0760   5096.69     0.12     350.51     0.06
    19   1.0762   5092.01    -0.00     350.41    -0.14
    20   1.1417   3383.73     0.05     373.88     0.03
    21   1.2836   -487.76     0.19     417.49     0.04
    22   1.3085   -955.61    -0.03     424.09     0.02
    23   2.0098  12596.86     0.06     649.84    -0.04
    24   2.0236  12436.79    -0.01     655.81    -0.01

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.

15VC166    quality flag:2

Type:           2:1E  SCATNEAR      2:1E

axisobj        48.647    48.665    48.629
ecceobj         0.247     0.247     0.247
incobj          2.911     2.911     2.911
qmin           36.070    35.673    36.031
qmax           60.777    61.296    60.780
amean          47.798    47.839    47.799
amin           47.027    46.946    47.051
amax           48.694    48.750    48.677
emean           0.232     0.234     0.232
emin            0.216     0.201     0.215
emax            0.249     0.258     0.249
imean           2.094     1.817     2.146
imin            1.715     0.880     1.756
imax            2.544     2.486     2.511
excite_mean     0.235     0.236     0.235
fracstop        1.000     1.000     1.000
cjmean          3.079     3.078     3.079

libcent 0       180.1    -180.0     178.7
libamp  0       165.4    -180.0     164.6
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       164.7     158.0     203.5
kozaiamp        180.0     179.9     180.0