Orbit Fit and Astrometric record for 15BV518

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: 15BV518   
# Created Mon Dec 18 02:38:09 2017
# Orbit generated from Bernstein formalism
# Fitting   27 observations of   27
# Arc:   3.98y
# First observation: 2011/01/30
#  Last observation: 2015/01/22
Preliminary a, adot, b, bdot, g, gdot:
   0.000021   0.020961  -0.000001   0.000562   0.022761   0.000000
# Chi-squared of fit:     3.78 DOF:   48 RMS:  0.07
# Min/Max residuals:    -0.16    0.17
# Exact a, adot, b, bdot, g, gdot:
  1.449223E-05  2.099723E-02  3.040766E-07  5.620260E-04  2.259271E-02  7.128732E-04
# Covariance matrix:
  3.5901E-13 -7.4421E-13  7.0962E-15 -1.9545E-14 -1.2179E-12 -8.1379E-12
 -7.4421E-13  5.5819E-12 -5.8784E-14  1.6388E-13  1.2160E-11  6.8203E-11
  7.0962E-15 -5.8784E-14  2.3607E-13 -6.5292E-14 -1.2925E-13 -7.2168E-13
 -1.9545E-14  1.6388E-13 -6.5292E-14  2.7157E-14  3.6194E-13  2.0132E-12
 -1.2179E-12  1.2160E-11 -1.2925E-13  3.6194E-13  2.8422E-11  1.5061E-10
 -8.1379E-12  6.8203E-11 -7.2168E-13  2.0132E-12  1.5061E-10  8.3781E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.944829  129.368213   -0.014797    0.016291   -0.987965  2455591.978126
# Heliocentric elements and errors
Epoch:              2455590.5000  =  2011/01/29
Mean Anomaly:          103.82770 +/-     0.289
Argument of Peri:      283.09057 +/-     0.236
Long of Asc Node:       98.31912 +/-     0.007
Inclination:             1.79074 +/-     0.000
Eccentricity:         0.03779040 +/-    0.0014
Semi-Major Axis:     44.78294446 +/-    0.0276
Time of Perihelion: 2424020.2422 +/-      82.9
Perihelion:          43.09057898 +/-    0.0689
Aphelion:            46.47530994 +/-    0.0697
Period (y)              299.6934 +/-      0.28
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -28.70623390 +/-    0.0066
Ecliptic Y           34.96728191 +/-    0.0081
Ecliptic Z            0.72986447 +/-    0.0002
Ecliptic XDOT        -0.00202228 +/-    0.0000
Ecliptic YDOT        -0.00154199 +/-    0.0000
Ecliptic ZDOT         0.00006954 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   45.24700400 +/-    0.0075
Geocenter to KBO     44.26207343 +/-    0.0104
# Hcoef:  5.60

The following table shows the complete astrometric record for 15BV518. 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 (15BV518) followed by the observatory code and reference code for the source of the astrometry.

2011 01  30.47736  08 48 16.828  +18 49 13.48  22.4w 15BV518   F51  C~1vYB      
2011 01  30.49245  08 48 16.751  +18 49 13.73  22.1w 15BV518   F51  C~1vYB      
2011 01  30.50873  08 48 16.672  +18 49 13.99  22.1w 15BV518   F51  C~1vYB      
2011 01  30.52381  08 48 16.602  +18 49 14.35  22.2w 15BV518   F51  C~1vYB      
2012 02  13.30793  08 52 09.053  +18 35 53.56  22.1w 15BV518   F51  C~1vYB      
2012 02  13.32248  08 52 08.993  +18 35 53.92  22.5w 15BV518   F51  C~1vYB      
2012 02  13.33705  08 52 08.910  +18 35 54.11  22.2w 15BV518   F51  C~1vYB      
2012 02  13.35162  08 52 08.851  +18 35 54.55  22.1w 15BV518   F51  C~1vYB      
2014 02  26.40790  09 00 57.210  +18 03 38.61  22.4w 15BV518   F51  C~1vYB      
2014 02  26.43393  09 00 57.092  +18 03 39.06  22.5w 15BV518   F51  C~1vYB      
2014 02  26.44695  09 00 57.043  +18 03 39.34  22.2w 15BV518   F51  C~1vYB      
2015 01  17.40903  09 08 50.394  +17 31 37.57  22.4w 15BV518   F51  C~1vYB      
2015 01  17.42104  09 08 50.349  +17 31 37.73  22.2w 15BV518   F51  C~1vYC      
2015 01  17.43307  09 08 50.298  +17 31 38.13  22.2w 15BV518   F51  C~1vYC      
2015 01  17.44511  09 08 50.248  +17 31 38.27  22.4w 15BV518   F51  C~1vYC      
2015 01  17.56998  09 08 49.703  +17 31 40.75  22.2w 15BV518   F51  C~1vYC      
2015 01  17.58226  09 08 49.632  +17 31 40.90  22.3w 15BV518   F51  C~1vYC      
2015 01  17.59462  09 08 49.581  +17 31 41.24  22.0w 15BV518   F51  C~1vYC      
2015 01  17.60703  09 08 49.528  +17 31 41.36  22.4w 15BV518   F51  C~1vYC      
2015 01  20.37441  09 08 37.349  +17 32 36.73  21.9w 15BV518   F51  C~1vYC      
2015 01  20.38644  09 08 37.291  +17 32 37.01  21.9w 15BV518   F51  C~1vYC      
2015 01  20.39849  09 08 37.240  +17 32 37.28  22.1w 15BV518   F51  C~1vYC      
2015 01  20.41073  09 08 37.187  +17 32 37.45  22.1w 15BV518   F51  C~1vYC      
2015 01  22.39535  09 08 28.311  +17 33 17.48  22.1w 15BV518   F51  C~1vYC      
2015 01  22.40750  09 08 28.264  +17 33 17.78  22.0w 15BV518   F51  C~1vYC      
2015 01  22.41964  09 08 28.202  +17 33 18.06  22.0w 15BV518   F51  C~1vYC      
2015 01  22.43182  09 08 28.150  +17 33 18.25  22.1w 15BV518   F51  C~1vYC      

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     0.04       0.00     0.02
  2   0.0000     -1.12    -0.01      -0.05    -0.03
  3   0.0001     -2.27    -0.01      -0.10    -0.08
  4   0.0001     -3.32    -0.00      -0.02     0.01
  5   1.0372   3393.15     0.02     117.71    -0.07
  6   1.0372   3392.23     0.09     117.83     0.05
  7   1.0373   3391.05    -0.10     117.69    -0.09
  8   1.0373   3390.12    -0.03     117.89     0.11
  9   3.0744  11165.63     0.05     346.93     0.11
 10   3.0745  11163.88    -0.06     346.89     0.09
 11   3.0745  11163.13     0.01     346.96     0.17
 12   3.9642  18227.01    -0.16     457.67    -0.02
 13   3.9643  18226.34    -0.03     457.63    -0.07
 14   3.9643  18225.52    -0.04     457.80     0.10
 15   3.9643  18224.79     0.04     457.73     0.01
 16   3.9647  18216.55     0.17     457.81     0.06
 17   3.9647  18215.52    -0.03     457.65    -0.10
 18   3.9647  18214.72    -0.01     457.77     0.01
 19   3.9648  18213.95     0.05     457.66    -0.10
 20   3.9723  18029.77     0.01     459.49    -0.04
 21   3.9724  18028.89    -0.05     459.52    -0.02
 22   3.9724  18028.10    -0.01     459.56     0.02
 23   3.9724  18027.32     0.04     459.50    -0.05
 24   3.9779  17893.21    -0.04     460.56    -0.08
 25   3.9779  17892.48     0.06     460.65     0.01
 26   3.9779  17891.54    -0.04     460.66     0.01
 27   3.9780  17890.77     0.03     460.62    -0.03

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.

15BV518    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        44.952    45.035    44.871
ecceobj         0.039     0.035     0.042
incobj          1.790     1.790     1.790
qmin           42.305    42.562    42.064
qmax           47.679    47.623    47.778
amean          44.892    44.976    44.810
amin           44.540    44.620    44.458
amax           45.253    45.349    45.182
emean           0.040     0.037     0.044
emin            0.025     0.023     0.030
emax            0.054     0.050     0.058
imean           0.489     0.475     0.504
imin            0.172     0.176     0.169
imax            0.746     0.720     0.780
excite_mean     0.041     0.038     0.045
fracstop        1.000     1.000     1.000
cjmean          3.110     3.112     3.109

libcent 0      -180.0    -180.0    -180.0
libamp  0      -180.0    -180.0    -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       178.6     181.8     175.9
kozaiamp        180.0     180.0     180.0