Orbit Fit and Astrometric record for 15BY518

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: 15BY518   
# Created Mon Oct 23 01:38:34 2017
# Orbit generated from Bernstein formalism
# Fitting   35 observations of   35
# Arc:  58.91d
# First observation: 2015/01/19
#  Last observation: 2015/03/19
Preliminary a, adot, b, bdot, g, gdot:
  -0.000009   0.030787   0.000006   0.007322   0.026967   0.000000
# Chi-squared of fit:     8.10 DOF:   64 RMS:  0.09
# Min/Max residuals:    -0.19    0.17
# Exact a, adot, b, bdot, g, gdot:
  1.663667E-05  2.839554E-02  4.329783E-06  7.476500E-03  2.662550E-02 -3.420945E-03
# Covariance matrix:
  1.0816E-13 -4.5813E-13  9.7941E-16  1.3821E-13  4.1804E-13  1.1227E-10
 -4.5813E-13  4.8513E-09  1.1824E-11 -2.8559E-10  7.3567E-10 -1.9065E-08
  9.7941E-16  1.1824E-11  1.0667E-13 -1.3143E-12  1.8045E-12 -4.4394E-11
  1.3821E-13 -2.8559E-10 -1.3143E-12  2.8290E-11 -4.1491E-11  1.6740E-09
  4.1804E-13  7.3567E-10  1.8045E-12 -4.1491E-11  1.1691E-10 -1.4349E-09
  1.1227E-10 -1.9065E-08 -4.4394E-11  1.6740E-09 -1.4349E-09  4.9477E-07
#      lat0       lon0       xBary       yBary       zBary        JD0
  -22.470504  139.636479    0.350581   -0.350408   -0.847630  2457041.974258
# Heliocentric elements and errors
Epoch:              2457040.5000  =  2015/01/18
Mean Anomaly:          336.54427 +/-     2.818
Argument of Peri:      340.03257 +/-     5.237
Long of Asc Node:      194.23388 +/-     0.075
Inclination:            26.14699 +/-     0.021
Eccentricity:         0.23682560 +/-    0.0189
Semi-Major Axis:     48.28452224 +/-    0.5429
Time of Perihelion: 2465025.1679 +/-     949.7
Perihelion:          36.84951126 +/-    1.0016
Aphelion:            59.71953322 +/-    1.1324
Period (y)              335.5213 +/-      5.66
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -26.91978375 +/-    0.0107
Ecliptic Y           23.33856469 +/-    0.0091
Ecliptic Z          -14.35482925 +/-    0.0058
Ecliptic XDOT        -0.00187107 +/-    0.0000
Ecliptic YDOT        -0.00225037 +/-    0.0000
Ecliptic ZDOT         0.00084497 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   38.41125462 +/-    0.0096
Geocenter to KBO     37.55798081 +/-    0.0153
# Hcoef:  6.27

The following table shows the complete astrometric record for 15BY518. 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 (15BY518) followed by the observatory code and reference code for the source of the astrometry.

2015 01  19.47348  09 00 29.231  -06 27 57.56  22.3w 15BY518   F51  C~1vYC      
2015 01  19.48481  09 00 29.183  -06 27 57.36  22.5w 15BY518   F51  C~1vYC      
2015 01  19.49615  09 00 29.119  -06 27 57.43  22.3w 15BY518   F51  C~1vYC      
2015 01  19.50762  09 00 29.069  -06 27 57.02  22.1w 15BY518   F51  C~1vYC      
2015 01  21.49804  09 00 19.278  -06 27 27.74  22.0w 15BY518   F51  C~1vYC      
2015 01  21.51155  09 00 19.212  -06 27 27.68  22.2w 15BY518   F51  C~1vYC      
2015 01  21.52508  09 00 19.150  -06 27 27.44  21.9w 15BY518   F51  C~1vYC      
2015 01  21.53851  09 00 19.073  -06 27 27.20  21.9w 15BY518   F51  C~1vYC      
2015 01  23.39542  09 00 09.887  -06 26 57.29  22.1w 15BY518   F51  C~1vYC      
2015 01  23.39608  09 00 09.876  -06 26 57.35  22.2w 15BY518   F51  C~1vYC      
2015 01  23.40878  09 00 09.820  -06 26 57.07  22.3w 15BY518   F51  C~1vYC      
2015 01  23.40945  09 00 09.809  -06 26 56.93  22.0w 15BY518   F51  C~1vYC      
2015 01  23.42212  09 00 09.751  -06 26 56.80  21.9w 15BY518   F51  C~1vYC      
2015 01  23.42278  09 00 09.745  -06 26 56.73  22.1w 15BY518   F51  C~1vYC      
2015 01  23.43545  09 00 09.683  -06 26 56.57  22.1w 15BY518   F51  C~1vYC      
2015 01  23.43611  09 00 09.682  -06 26 56.50  22.2w 15BY518   F51  C~1vYC      
2015 01  25.37926  08 59 59.991  -06 26 22.37  22.4w 15BY518   F51  C~1vYC      
2015 01  25.39232  08 59 59.926  -06 26 22.15  22.1w 15BY518   F51  C~1vYC      
2015 01  25.40539  08 59 59.840  -06 26 21.73  22.2w 15BY518   F51  C~1vYC      
2015 01  25.41844  08 59 59.783  -06 26 21.60  22.5w 15BY518   F51  C~1vYC      
2015 02  18.38235  08 57 59.949  -06 15 51.50  22.2w 15BY518   F51  C~1vYC      
2015 02  18.39534  08 57 59.893  -06 15 51.05  22.3w 15BY518   F51  C~1vYC      
2015 02  18.40827  08 57 59.817  -06 15 50.54  22.1w 15BY518   F51  C~1vYC      
2015 02  20.37368  08 57 50.466  -06 14 44.10  22.0w 15BY518   F51  C~1vYC      
2015 02  20.38651  08 57 50.390  -06 14 43.68  22.4w 15BY518   F51  C~1vYC      
2015 02  20.39944  08 57 50.341  -06 14 43.32  22.3w 15BY518   F51  C~1vYC      
2015 02  20.41237  08 57 50.272  -06 14 42.87  22.4w 15BY518   F51  C~1vYC      
2015 03  18.34569  08 56 04.803  -05 57 46.26  22.1w 15BY518   F51  C~1vYC      
2015 03  18.35861  08 56 04.751  -05 57 45.77  22.3w 15BY518   F51  C~1vYC      
2015 03  18.37159  08 56 04.717  -05 57 45.26  22.2w 15BY518   F51  C~1vYC      
2015 03  18.38449  08 56 04.676  -05 57 44.53  22.1w 15BY518   F51  C~1vYC      
2015 03  19.34315  08 56 01.617  -05 57 03.86  21.9w 15BY518   F51  C~1vYC      
2015 03  19.35611  08 56 01.572  -05 57 03.29  22.3w 15BY518   F51  C~1vYC      
2015 03  19.36904  08 56 01.527  -05 57 02.73  22.3w 15BY518   F51  C~1vYC      
2015 03  19.38197  08 56 01.484  -05 57 02.09  22.6w 15BY518   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     0.05       0.00     0.02
  2   0.0000     -0.74     0.15      -0.03     0.10
  3   0.0001     -1.63     0.12      -0.39    -0.15
  4   0.0001     -2.46     0.14      -0.22     0.12
  5   0.0055   -150.37    -0.12     -16.86     0.10
  6   0.0056   -151.33    -0.04     -17.10    -0.04
  7   0.0056   -152.28     0.03     -17.15     0.02
  8   0.0057   -153.45    -0.11     -17.27     0.01
  9   0.0107   -292.96     0.00     -30.57    -0.07
 10   0.0107   -293.10    -0.09     -30.68    -0.17
 11   0.0108   -293.98     0.01     -30.67    -0.07
 12   0.0108   -294.18    -0.14     -30.58     0.02
 13   0.0108   -295.04    -0.02     -30.72    -0.03
 14   0.0108   -295.15    -0.08     -30.68     0.01
 15   0.0108   -296.08    -0.03     -30.81    -0.03
 16   0.0108   -296.11    -0.02     -30.75     0.04
 17   0.0162   -444.08     0.13     -42.34     0.01
 18   0.0162   -445.07     0.15     -42.42    -0.00
 19   0.0162   -446.42    -0.18     -42.41     0.08
 20   0.0163   -447.27    -0.01     -42.55     0.02
 21   0.0819  -2340.95    -0.09      11.23     0.03
 22   0.0819  -2341.88     0.02      11.40     0.08
 23   0.0820  -2343.11    -0.19      11.54     0.10
 24   0.0873  -2496.21     0.14      32.09     0.02
 25   0.0874  -2497.42    -0.05      32.15    -0.07
 26   0.0874  -2498.22     0.17      32.27    -0.09
 27   0.0874  -2499.34     0.07      32.38    -0.11
 28   0.1584  -4308.86     0.06     517.76     0.05
 29   0.1585  -4309.75    -0.05     517.99    -0.05
 30   0.1585  -4310.39     0.09     518.32    -0.04
 31   0.1586  -4311.20     0.06     518.83     0.14
 32   0.1612  -4367.15     0.02     543.53    -0.03
 33   0.1612  -4367.96    -0.02     543.86    -0.03
 34   0.1612  -4368.77    -0.07     544.19    -0.04
 35   0.1613  -4369.58    -0.12     544.60     0.04

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.

15BY518    quality flag:1

Type:           2:1E  SCATNEAR  SCATEXTD

axisobj        47.994    49.524    46.950
ecceobj         0.230     0.280     0.194
incobj         26.177    26.148    26.219
qmin           36.081    34.115    36.743
qmax           60.417    65.593    57.468
amean          47.795    49.542    46.881
amin           47.184    49.043    46.474
amax           48.502    50.110    47.349
emean           0.225     0.290     0.198
emin            0.199     0.270     0.182
emax            0.247     0.309     0.214
imean          26.237    25.884    26.188
imin           25.812    25.391    25.760
imax           26.802    26.393    26.564
excite_mean     0.496     0.524     0.484
fracstop        1.000     1.000     1.000
cjmean          2.832     2.816     2.837

libcent 0       180.4    -180.0    -180.0
libamp  0       171.4    -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       154.4     182.2     170.2
kozaiamp        180.0     180.0     180.0