Orbit Fit and Astrometric record for 15VP166

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: 15VP166   
# Created Tue Apr 23 01:10:47 2019
# Orbit generated from Bernstein formalism
# Fitting   26 observations of   26
# Arc:   3.08y
# First observation: 2014/11/17
#  Last observation: 2017/12/16
Preliminary a, adot, b, bdot, g, gdot:
   0.000370   0.023692   0.000126   0.009231   0.023475   0.000000
# Chi-squared of fit:     9.52 DOF:   46 RMS:  0.11
# Min/Max residuals:    -0.37    0.27
# Exact a, adot, b, bdot, g, gdot:
  1.672629E-05  2.448867E-02  6.434574E-06  9.535454E-03  2.406186E-02  8.998452E-03
# Covariance matrix:
  3.1478E-13 -3.4087E-13  4.1132E-14 -9.0173E-14 -1.7376E-13 -3.2964E-12
 -3.4087E-13  5.4142E-13 -7.8779E-14  1.7275E-13  2.4667E-13  6.3230E-12
  4.1132E-14 -7.8779E-14  1.8844E-13 -1.2500E-13 -3.9381E-14 -1.0783E-12
 -9.0173E-14  1.7275E-13 -1.2500E-13  1.4276E-13  8.6250E-14  2.3648E-12
 -1.7376E-13  2.4667E-13 -3.9381E-14  8.6250E-14  3.2004E-13  3.1393E-12
 -3.2964E-12  6.3230E-12 -1.0783E-12  2.3648E-12  3.1393E-12  8.6576E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.337214   48.638778   -0.100448   -0.005647   -0.984348  2456978.782278
# Heliocentric elements and errors
Epoch:              2456970.5000  =  2014/11/09
Mean Anomaly:           17.17984 +/-     0.015
Argument of Peri:      301.88051 +/-     0.026
Long of Asc Node:       49.62296 +/-     0.000
Inclination:            21.29469 +/-     0.001
Eccentricity:         0.52335416 +/-    0.0004
Semi-Major Axis:     75.19609804 +/-    0.0434
Time of Perihelion: 2445604.4910 +/-       1.5
Perihelion:          35.84190708 +/-    0.0359
Aphelion:           114.55028900 +/-    0.0722
Period (y)              652.0804 +/-      0.56
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           28.03414484 +/-    0.0006
Ecliptic Y           31.99907580 +/-    0.0007
Ecliptic Z           -0.24434372 +/-    0.0000
Ecliptic XDOT        -0.00141485 +/-    0.0000
Ecliptic YDOT         0.00260957 +/-    0.0000
Ecliptic ZDOT         0.00107904 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   42.54308208 +/-    0.0007
Geocenter to KBO     41.55955060 +/-    0.0010
# Hcoef:  8.24

The following table shows the complete astrometric record for 15VP166. 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 (15VP166) followed by the observatory code and reference code for the source of the astrometry.

2014 11  17.28150  03 05 06.765  +17 02 47.90  24.3r 15VP166   568  C~2lVf      
2014 11  17.50402  03 05 05.663  +17 02 44.66  24.1r 15VP166   568  C~2lVf      
2014 11  19.29385  03 04 56.888  +17 02 18.86  24.2r 15VP166   568  C~2lVf      
2014 11  23.39737  03 04 36.896  +17 01 20.31  24.2r 15VP166   568  C~2lVf      
2015 08  11.57225  03 14 43.539  +18 05 49.12  24.8w 15VP166   568  C~2lVf      
2015 09  06.61892  03 14 38.027  +18 07 51.69  24.7w 15VP166   568  C~2lVf      
2015 09  12.50905  03 14 28.226  +18 07 46.01  24.5w 15VP166   568  C~2lVf      
2015 10  07.43408  03 13 15.606  +18 05 22.31  25.3w 15VP166   568  C~2lVf      
2015 10  08.44583  03 13 11.718  +18 05 13.00  24.7w 15VP166   568  C~2lVf      
2015 10  08.50488  03 13 11.497  +18 05 12.49  24.7w 15VP166   568  C~2lVf      
2015 11  07.35377  03 10 56.661  +17 59 08.02  24.2r 15VP166   568  C~2lVf      
2015 11  07.39585  03 10 56.449  +17 59 07.40  24.4r 15VP166   568  C~2lVf      
2015 11  07.43803  03 10 56.244  +17 59 06.85  24.8r 15VP166   568  C~2lVf      
2015 11  10.52298  03 10 40.964  +17 58 23.22  24.6w 15VP166   568  C~2lVf      
2015 11  17.36965  03 10 07.066  +17 56 46.07  24.5w 15VP166   568  C~2lVf      
2015 11  17.41626  03 10 06.836  +17 56 45.39  24.5w 15VP166   568  C~2lVf      
2015 12  13.31287  03 08 07.263  +17 51 06.23  24.6w 15VP166   568  C~2lVf      
2015 12  13.37141  03 08 07.028  +17 51 05.59  24.7w 15VP166   568  C~2lVf      
2016 11  02.53733  03 16 13.166  +18 52 24.21        15VP166   568  C~2lVf      
2016 11  04.41248  03 16 04.041  +18 51 59.63        15VP166   568  C~2lVf      
2016 12  24.30698  03 12 18.308  +18 41 36.04        15VP166   568  C~2lVf      
2017 01  02.40920  03 11 50.003  +18 40 25.62        15VP166   568  C~2lVf      
2017 01  26.29981  03 11 09.055  +18 39 25.19  23.9w 15VP166   568  C~2lVf      
2017 09  15.60695  03 24 04.492  +19 49 07.89  24.7w 15VP166   568  C~2lVf      
2017 09  22.59291  03 23 48.258  +19 48 55.18  25.1w 15VP166   568  C~2lVf      
2017 12  16.36391  03 17 41.808  +19 34 01.53  24.9w 15VP166   568  C~2lVf      

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    -0.13       0.00    -0.03
  2   0.0006    -16.09     0.03       1.23    -0.09
  3   0.0055   -144.17     0.12      11.04     0.01
  4   0.0167   -435.94    -0.06      33.70     0.14
  5   0.7318   8966.50     0.27    1425.01     0.06
  6   0.8031   8922.83    -0.37    1564.06     0.27
  7   0.8192   8786.28    -0.04    1595.32    -0.11
  8   0.8875   7748.03     0.07    1729.81    -0.21
  9   0.8903   7692.03    -0.13    1735.50     0.00
 10   0.8904   7688.85     0.04    1735.84     0.00
 11   0.9721   5735.92     0.13    1896.13     0.07
 12   0.9723   5732.84     0.10    1896.34     0.04
 13   0.9724   5729.87     0.21    1896.59     0.05
 14   0.9808   5507.97    -0.10    1912.90    -0.04
 15   0.9996   5015.60    -0.04    1949.02    -0.03
 16   0.9997   5012.26     0.01    1949.25    -0.07
 17   1.0706   3276.49    -0.11    2083.17    -0.03
 18   1.0707   3273.09     0.03    2083.47    -0.05
 19   1.9610  10933.90     0.04    3792.91    -0.04
 20   1.9661  10802.06    -0.09    3802.89    -0.03
 21   2.1027   7538.25     0.03    4043.98    -0.04
 22   2.1277   7131.22     0.10    4082.97     0.00
 23   2.1931   6553.55    -0.07    4179.83     0.10
 24   2.8291  18292.71     0.04    5392.64    -0.01
 25   2.8482  18065.93    -0.01    5437.52     0.03
 26   3.0803  12802.39    -0.06    5884.91     0.00

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.

15VP166    quality flag:2

Type:       SCATNEAR    4:1EEE  SCATNEAR

axisobj        76.626    76.756    76.495
ecceobj         0.532     0.534     0.531
incobj         21.244    21.244    21.244
qmin           34.680    34.866    34.817
qmax          120.170   120.198   118.027
amean          75.823    75.872    75.234
amin           74.274    74.438    74.216
amax           77.954    77.902    76.792
emean           0.523     0.527     0.520
emin            0.502     0.515     0.504
emax            0.543     0.544     0.537
imean          20.848    20.562    20.815
imin           19.672    19.895    19.851
imax           22.061    21.036    21.777
excite_mean     0.633     0.634     0.630
fracstop        1.000     1.000     1.000
cjmean          2.925     2.923     2.925

libcent 0      -180.0     178.9    -180.0
libamp  0      -180.0     174.5    -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       168.7     167.5     200.9
kozaiamp        180.0     180.0     180.0