Orbit Fit and Astrometric record for 15KV167

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: 15KV167   
# Created Wed Feb 20 02:10:33 2019
# Orbit generated from Bernstein formalism
# Fitting    8 observations of    8
# Arc:   0.90y
# First observation: 2015/05/18
#  Last observation: 2016/04/10
Preliminary a, adot, b, bdot, g, gdot:
  -0.000012   0.009849  -0.000001   0.003487   0.015447   0.000000
# Chi-squared of fit:    10.86 DOF:   10 RMS:  0.21
# Min/Max residuals:    -0.30    0.54
# Exact a, adot, b, bdot, g, gdot:
  9.699301E-06  9.766375E-03  4.541744E-06  3.488365E-03  1.555495E-02 -4.159905E-04
# Covariance matrix:
  4.8546E-13  1.7143E-12  3.1300E-14  5.3602E-13  1.8419E-12  1.9179E-10
  1.7143E-12  8.2871E-11  3.5948E-13  1.5784E-11  3.4516E-11  5.6427E-09
  3.1300E-14  3.5948E-13  3.1802E-13 -2.8093E-13  3.2907E-13  3.3602E-11
  5.3602E-13  1.5784E-11 -2.8093E-13  4.2888E-12  7.7270E-12  1.1420E-09
  1.8419E-12  3.4516E-11  3.2907E-13  7.7270E-12  2.2268E-11  2.7636E-09
  1.9179E-10  5.6427E-09  3.3602E-11  1.1420E-09  2.7636E-09  4.0830E-07
#      lat0       lon0       xBary       yBary       zBary        JD0
   19.552335 -143.141863   -0.347928    0.317324   -0.893202  2457160.818398
# Heliocentric elements and errors
Epoch:              2457160.5000  =  2015/05/18
Mean Anomaly:          188.87672 +/-     9.436
Argument of Peri:      221.05210 +/-     9.719
Long of Asc Node:      174.10729 +/-     0.027
Inclination:            27.11231 +/-     0.012
Eccentricity:         0.26508545 +/-    0.0046
Semi-Major Axis:     51.60774401 +/-    0.1275
Time of Perihelion: 2521529.5839 +/-    3541.4
Perihelion:          37.92728214 +/-    0.2555
Aphelion:            65.28820589 +/-    0.2873
Period (y)              370.7494 +/-      1.37
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -49.02494428 +/-    0.0147
Ecliptic Y          -37.18605257 +/-    0.0110
Ecliptic Z           21.51551648 +/-    0.0065
Ecliptic XDOT         0.00124791 +/-    0.0001
Ecliptic YDOT        -0.00121689 +/-    0.0001
Ecliptic ZDOT         0.00055416 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   65.18562047 +/-    0.0129
Geocenter to KBO     64.28821391 +/-    0.0195
# Hcoef:  7.28

The following table shows the complete astrometric record for 15KV167. 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 (15KV167) followed by the observatory code and reference code for the source of the astrometry.

2015 05  18.31762  14 43 21.450  +04 42 56.05  25.4r 15KV167   568  C~2Zru      
2015 05  18.40098  14 43 21.191  +04 42 56.92        15KV167   568  C~2Zru      
2015 05  18.48649  14 43 20.932  +04 42 57.78        15KV167   568  C~2Zru      
2015 06  11.32152  14 42 15.740  +04 45 21.77  25.2r 15KV167   568  C~2Zru      
2015 06  12.32130  14 42 13.381  +04 45 22.94        15KV167   568  C~2Zru      
2016 03  10.38472  14 48 48.131  +04 20 32.95  25.2r 15KV167   304  C~2Zru      
2016 04  10.49149  14 47 37.259  +04 32 59.15  25.3r 15KV167   568  C~2Zru      
2016 04  10.62356  14 47 36.877  +04 33 02.17  25.2r 15KV167   568  C~2Zru      

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    -0.21
  2   0.0002     -3.95    -0.00      -0.41    -0.26
  3   0.0005     -7.89     0.04      -0.83    -0.30
  4   0.0657   -977.43    -0.09    -175.41     0.27
  5   0.0685  -1011.22    -0.01    -185.55     0.54
  6   0.8133   5058.78     0.08     292.10     0.23
  7   0.8985   3814.90     0.01     658.71    -0.18
  8   0.8989   3808.52    -0.08     659.74    -0.09

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.

15KV167    quality flag:2

Type:       SCATNEAR   7:3EEEE  SCATNEAR

axisobj        51.250    52.609    51.129
ecceobj         0.274     0.317     0.274
incobj         27.255    27.225    27.269
qmin           36.160    35.751    36.473
qmax           67.650    71.072    67.065
amean          51.599    52.968    51.435
amin           51.106    52.372    50.947
amax           52.191    53.695    52.015
emean           0.276     0.302     0.272
emin            0.252     0.279     0.254
emax            0.297     0.325     0.289
imean          26.364    26.971    26.521
imin           25.711    26.276    26.186
imax           27.049    27.644    26.967
excite_mean     0.523     0.545     0.523
fracstop        1.000     1.000     1.000
cjmean          2.838     2.822     2.836

libcent 0      -180.0     177.2    -180.0
libamp  0      -180.0     157.2    -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       185.0     181.0     178.5
kozaiamp        180.0     180.0     180.0