Orbit Fit and Astrometric record for 15BR518

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: 15BR518   
# Created Tue Oct 24 01:38:33 2017
# Orbit generated from Bernstein formalism
# Fitting   15 observations of   15
# Arc: 162.68d
# First observation: 2015/01/27
#  Last observation: 2015/07/09
Preliminary a, adot, b, bdot, g, gdot:
  -0.000038   0.031934  -0.000047   0.000401   0.026482   0.000000
# Chi-squared of fit:     5.82 DOF:   24 RMS:  0.11
# Min/Max residuals:    -0.21    0.27
# Exact a, adot, b, bdot, g, gdot:
  1.652982E-05  2.623936E-02 -5.162934E-07 -4.125650E-04  2.547568E-02  3.422963E-03
# Covariance matrix:
  3.6500E-13 -1.3058E-12 -1.3422E-14 -2.7584E-13  1.2238E-12  1.6707E-10
 -1.3058E-12  2.3683E-09 -2.1884E-11  3.4570E-10  4.2177E-10 -2.7712E-08
 -1.3422E-14 -2.1884E-11  3.6279E-13 -3.6080E-12 -4.0465E-12  2.4004E-10
 -2.7584E-13  3.4570E-10 -3.6080E-12  5.3680E-11  6.0660E-11 -4.1619E-09
  1.2238E-12  4.2177E-10 -4.0465E-12  6.0660E-11  8.4436E-11 -3.8940E-09
  1.6707E-10 -2.7712E-08  2.4004E-10 -4.1619E-09 -3.8940E-09  4.4361E-07
#      lat0       lon0       xBary       yBary       zBary        JD0
   10.057311  174.002064    0.718296    0.117179   -0.659855  2457050.114008
# Heliocentric elements and errors
Epoch:              2457050.5000  =  2015/01/28
Mean Anomaly:           42.92968 +/-     3.888
Argument of Peri:       37.93624 +/-     6.417
Long of Asc Node:       78.85863 +/-     0.080
Inclination:             9.91174 +/-     0.001
Eccentricity:         0.14745411 +/-    0.0218
Semi-Major Axis:     44.16618290 +/-    0.2348
Time of Perihelion: 2444265.8644 +/-    1153.3
Perihelion:          37.65369774 +/-    0.9813
Aphelion:            50.67866806 +/-    0.9977
Period (y)              293.5236 +/-      2.34
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -39.03283256 +/-    0.0139
Ecliptic Y            4.82309574 +/-    0.0015
Ecliptic Z            6.85487169 +/-    0.0025
Ecliptic XDOT        -0.00066640 +/-    0.0001
Ecliptic YDOT        -0.00277125 +/-    0.0000
Ecliptic ZDOT         0.00002068 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   39.92259430 +/-    0.0136
Geocenter to KBO     39.25312712 +/-    0.0142
# Hcoef:  6.27

The following table shows the complete astrometric record for 15BR518. 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 (15BR518) followed by the observatory code and reference code for the source of the astrometry.

2015 01  27.61323  11 54 09.971  +11 36 14.94  22.9w 15BR518   F51  C~1vYB      
2015 01  27.62539  11 54 09.945  +11 36 15.16  22.6w 15BR518   F51  C~1vYB      
2015 01  27.63752  11 54 09.894  +11 36 15.69  22.3w 15BR518   F51  C~1vYB      
2015 01  27.64961  11 54 09.882  +11 36 15.87  22.7w 15BR518   F51  C~1vYB      
2015 02  16.41057  11 53 03.722  +11 46 48.92  22.3w 15BR518   F51  C~1vYB      
2015 02  16.42200  11 53 03.668  +11 46 49.48  22.3w 15BR518   F51  C~1vYB      
2015 02  16.43346  11 53 03.629  +11 46 49.58  22.6w 15BR518   F51  C~1vYB      
2015 02  16.44491  11 53 03.593  +11 46 50.16  22.7w 15BR518   F51  C~1vYB      
2015 02  17.55525  11 52 59.118  +11 47 27.48  22.5w 15BR518   F51  C~1vYB      
2015 02  17.56710  11 52 59.077  +11 47 27.84  22.3w 15BR518   F51  C~1vYB      
2015 02  17.57901  11 52 59.032  +11 47 28.56  22.3w 15BR518   F51  C~1vYB      
2015 07  09.27728  11 47 21.150  +12 02 06.57  22.2w 15BR518   F51  C~1vYB      
2015 07  09.28241  11 47 21.161  +12 02 06.37  22.1w 15BR518   F51  C~1vYB      
2015 07  09.28756  11 47 21.199  +12 02 06.24  22.2w 15BR518   F51  C~1vYB      
2015 07  09.29271  11 47 21.191  +12 02 06.12  22.1w 15BR518   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    -0.05       0.00     0.05
  2   0.0000     -0.44     0.10       0.05    -0.03
  3   0.0001     -1.34    -0.21       0.23     0.02
  4   0.0001     -1.57     0.15       0.32    -0.02
  5   0.0542  -1146.18     0.06     187.54    -0.08
  6   0.0542  -1147.14    -0.12     187.74     0.03
  7   0.0543  -1147.70     0.10     187.60    -0.19
  8   0.0543  -1148.42     0.16     187.91     0.05
  9   0.0573  -1223.60    -0.12     195.60    -0.06
 10   0.0574  -1224.29     0.00     195.68    -0.04
 11   0.0574  -1225.19    -0.07     196.08     0.27
 12   0.4453  -6122.50    -0.06    -986.36    -0.03
 13   0.4454  -6122.27    -0.08    -986.47    -0.08
 14   0.4454  -6121.71     0.23    -986.37     0.10
 15   0.4454  -6121.77    -0.09    -986.53     0.01

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.

15BR518    quality flag:2

Type:       SCATNEAR  SCATNEAR CLASSICAL

axisobj        43.804    44.793    43.272
ecceobj         0.143     0.208     0.092
incobj          9.906     9.908     9.905
qmin           33.171    30.767    38.143
qmax           55.025    72.887    48.931
amean          43.866    46.635    43.412
amin           43.139    43.644    43.063
amax           44.397    52.373    43.791
emean           0.186     0.286     0.099
emin            0.132     0.196     0.080
emax            0.241     0.395     0.118
imean           8.768     6.128     8.315
imin            7.117     2.789     7.383
imax           10.381     8.578     9.241
excite_mean     0.241     0.307     0.175
fracstop        1.000     1.000     1.000
cjmean          3.027     3.014     3.058

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       177.3     183.0     176.7
kozaiamp        180.0     180.0     179.9