Orbit Fit and Astrometric record for 15BO518

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: 15BO518   
# Created Wed Dec 13 02:38:09 2017
# Orbit generated from Bernstein formalism
# Fitting   18 observations of   18
# Arc:   4.05y
# First observation: 2011/01/30
#  Last observation: 2015/02/16
Preliminary a, adot, b, bdot, g, gdot:
  -0.000056   0.025727   0.000013  -0.003303   0.025806   0.000000
# Chi-squared of fit:     6.07 DOF:   30 RMS:  0.10
# Min/Max residuals:    -0.20    0.22
# Exact a, adot, b, bdot, g, gdot:
  1.637560E-05  2.513697E-02 -1.838176E-06 -3.229144E-03  2.493193E-02 -5.106815E-03
# Covariance matrix:
  4.8868E-13 -2.8857E-13 -3.7917E-15  2.1439E-14 -1.4671E-13 -1.6138E-12
 -2.8857E-13  2.7927E-12  6.2857E-14 -3.5611E-13  4.7207E-12  2.6840E-11
 -3.7917E-15  6.2857E-14  4.6321E-13 -1.2978E-13  1.0789E-13  6.1258E-13
  2.1439E-14 -3.5611E-13 -1.2978E-13  8.4666E-14 -6.1158E-13 -3.4706E-12
 -1.4671E-13  4.7207E-12  1.0789E-13 -6.1158E-13  9.2488E-12  4.6112E-11
 -1.6138E-12  2.6840E-11  6.1258E-13 -3.4706E-12  4.6112E-11  2.6158E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    2.347700  143.871691    0.231829    0.039342   -0.959832  2455592.054086
# Heliocentric elements and errors
Epoch:              2455590.5000  =  2011/01/29
Mean Anomaly:          311.23690 +/-     0.059
Argument of Peri:      235.14911 +/-     0.031
Long of Asc Node:      340.79721 +/-     0.001
Inclination:             7.68913 +/-     0.000
Eccentricity:         0.23082569 +/-    0.0008
Semi-Major Axis:     46.38016789 +/-    0.0334
Time of Perihelion: 2471217.8644 +/-       8.4
Perihelion:          35.67443351 +/-    0.0442
Aphelion:            57.08590227 +/-    0.0546
Period (y)              315.8688 +/-      0.34
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -33.00442468 +/-    0.0039
Ecliptic Y           24.38093690 +/-    0.0029
Ecliptic Z            1.64293822 +/-    0.0002
Ecliptic XDOT        -0.00118774 +/-    0.0000
Ecliptic YDOT        -0.00254526 +/-    0.0000
Ecliptic ZDOT        -0.00037726 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.06606115 +/-    0.0036
Geocenter to KBO     40.10920624 +/-    0.0049
# Hcoef:  6.53

The following table shows the complete astrometric record for 15BO518. 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 (15BO518) followed by the observatory code and reference code for the source of the astrometry.

2011 01  30.55332  09 47 58.688  +15 46 41.53  22.6w 15BO518   F51  C~1vYB      
2011 01  30.57064  09 47 58.614  +15 46 41.81  22.5w 15BO518   F51  C~1vYB      
2011 01  30.58575  09 47 58.541  +15 46 42.45  22.8w 15BO518   F51  C~1vYB      
2014 02  28.30870  10 01 52.737  +13 56 32.10  22.4w 15BO518   F51  C~1vYB      
2014 02  28.32175  10 01 52.675  +13 56 32.52  22.7w 15BO518   F51  C~1vYB      
2014 02  28.33490  10 01 52.613  +13 56 32.77  22.3w 15BO518   F51  C~1vYB      
2014 02  28.34791  10 01 52.546  +13 56 33.19  22.6w 15BO518   F51  C~1vYB      
2015 01  20.42407  10 10 27.116  +12 58 19.25  22.9w 15BO518   F51  C~1vYB      
2015 01  20.44519  10 10 27.033  +12 58 19.86  22.8w 15BO518   F51  C~1vYB      
2015 01  20.45856  10 10 26.964  +12 58 20.18  23.0w 15BO518   F51  C~1vYB      
2015 01  20.47201  10 10 26.910  +12 58 20.36  22.6w 15BO518   F51  C~1vYB      
2015 01  22.44380  10 10 18.682  +12 59 04.02  22.9w 15BO518   F51  C~1vYB      
2015 01  22.45740  10 10 18.612  +12 59 04.52  22.6w 15BO518   F51  C~1vYB      
2015 01  22.47101  10 10 18.542  +12 59 04.84  22.9w 15BO518   F51  C~1vYB      
2015 01  22.48471  10 10 18.486  +12 59 05.15  22.7w 15BO518   F51  C~1vYB      
2015 02  16.34390  10 08 22.062  +13 09 12.12  22.2w 15BO518   F51  C~1vYB      
2015 02  16.35642  10 08 22.004  +13 09 12.37  22.3w 15BO518   F51  C~1vYB      
2015 02  16.36899  10 08 21.921  +13 09 12.75  22.6w 15BO518   F51  C~1vYB      

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    -0.04
  2   0.0000     -1.10     0.09      -0.09    -0.11
  3   0.0001     -2.31    -0.00       0.16     0.16
  4   3.0794  13641.72    -0.01   -2088.09    -0.10
  5   3.0794  13640.73    -0.01   -2088.01     0.02
  6   3.0795  13639.79     0.05   -2088.09    -0.02
  7   3.0795  13638.72    -0.03   -2088.04     0.07
  8   3.9723  21958.56     0.07   -2716.83     0.03
  9   3.9723  21957.19     0.09   -2716.69     0.19
 10   3.9724  21956.13    -0.09   -2716.75     0.15
 11   3.9724  21955.32    -0.01   -2716.86     0.05
 12   3.9778  21825.94     0.22   -2718.89    -0.20
 13   3.9778  21824.79    -0.00   -2718.79    -0.08
 14   3.9779  21823.71    -0.16   -2718.85    -0.13
 15   3.9779  21822.82    -0.12   -2718.85    -0.11
 16   4.0460  19998.35     0.04   -2755.60     0.08
 17   4.0460  19997.46     0.13   -2755.67     0.04
 18   4.0460  19996.18    -0.16   -2755.74    -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.

15BO518    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        46.489    46.581    46.398
ecceobj         0.230     0.232     0.228
incobj          7.686     7.686     7.686
qmin           35.083    35.043    34.964
qmax           58.552    58.797    58.159
amean          46.542    46.602    46.306
amin           46.094    46.137    45.565
amax           47.088    47.231    46.993
emean           0.228     0.231     0.225
emin            0.212     0.216     0.211
emax            0.246     0.247     0.240
imean           8.660     8.660     8.620
imin            7.609     7.651     7.519
imax            9.576     9.484     9.555
excite_mean     0.274     0.276     0.271
fracstop        1.000     1.000     1.000
cjmean          3.040     3.039     3.039

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       180.2     179.9     181.7
kozaiamp        180.0     179.9     179.9