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 Wed Jul 18 01:38:30 2018
# Orbit generated from Bernstein formalism
# Fitting   20 observations of   21
# Arc:   5.15y
# First observation: 2013/02/14
#  Last observation: 2018/04/10
Preliminary a, adot, b, bdot, g, gdot:
  -0.000093   0.026560   0.000012  -0.000104   0.026173   0.000000
# Chi-squared of fit:     8.92 DOF:   34 RMS:  0.12
# Min/Max residuals:    -0.21    0.26
# Exact a, adot, b, bdot, g, gdot:
  1.647135E-05  2.667203E-02 -2.219427E-07 -1.404909E-04  2.573025E-02  2.355981E-03
# Covariance matrix:
  3.6676E-13 -2.6266E-13 -1.0274E-15  4.3293E-16 -1.1523E-13 -1.5095E-12
 -2.6266E-13  3.0136E-13  1.5822E-15 -6.5768E-16  1.7730E-13  2.3180E-12
 -1.0274E-15  1.5822E-15  2.6324E-13 -1.0352E-13  3.8427E-15  8.1212E-15
  4.3293E-16 -6.5768E-16 -1.0352E-13  5.7120E-14  4.4655E-15 -1.8873E-14
 -1.1523E-13  1.7730E-13  3.8427E-15  4.4655E-15  3.2837E-13  1.1713E-12
 -1.5095E-12  2.3180E-12  8.1212E-15 -1.8873E-14  1.1713E-12  2.3293E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   10.137265  170.612405    0.413686    0.157809   -0.882248  2456337.906018
# Heliocentric elements and errors
Epoch:              2456330.5000  =  2013/02/07
Mean Anomaly:           36.55276 +/-     0.044
Argument of Peri:       45.21038 +/-     0.063
Long of Asc Node:       78.86596 +/-     0.003
Inclination:             9.91135 +/-     0.000
Eccentricity:         0.12074045 +/-    0.0002
Semi-Major Axis:     43.72561351 +/-    0.0041
Time of Perihelion: 2445607.4104 +/-      12.8
Perihelion:          38.44616322 +/-    0.0077
Aphelion:            49.00506380 +/-    0.0082
Period (y)              289.1426 +/-      0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -38.56153438 +/-    0.0008
Ecliptic Y            6.79656772 +/-    0.0001
Ecliptic Z            6.84044596 +/-    0.0002
Ecliptic XDOT        -0.00071521 +/-    0.0000
Ecliptic YDOT        -0.00275848 +/-    0.0000
Ecliptic ZDOT         0.00002954 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   39.74892410 +/-    0.0008
Geocenter to KBO     38.86475986 +/-    0.0009
# Hcoef:  6.33

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.

2013 02  14.40524  11 41 47.768  +13 01 25.04  22.6w 15BR518   F51  C~2dZL      
2013 02  14.41981  11 41 47.705  +13 01 25.29  22.5w 15BR518   F51  C~2dZL      
2013 02  14.43445  11 41 47.646  +13 01 25.97  22.6w 15BR518   F51  C~2dZL      
2013 02  14.44920  11 41 47.582  +13 01 26.49  22.6w 15BR518   F51  C~2dZL      
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      
2018 04  10.17783  12 05 48.057  +10 18 37.16  22.2R 15BR518   G37  C~2dZL      
2018 04  10.23001  12 05 47.800  +10 18 37.49        15BR518   G37  C~2dZL      

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    -0.02       0.00     0.03
  2   0.0000     -0.94     0.05      -0.14    -0.21
  3   0.0001     -2.01     0.00       0.13    -0.03
  4   0.0001     -3.07    -0.04       0.23    -0.03
  5   1.9499  12028.66     0.03    -225.68     0.19
  6   1.9500  12028.22     0.18    -225.64     0.10
  7   1.9500  12027.32    -0.13    -225.46     0.15
  8   1.9500  12027.08     0.22    -225.37     0.11
  9   2.0041  10877.06     0.00     -49.76    -0.09
 10   2.0042  10876.10    -0.17     -49.58     0.02
 11   2.0042  10875.54     0.05     -49.72    -0.19
 12   2.0042  10874.81     0.10     -49.41     0.05
 13   2.0073  10799.35    -0.17     -42.50    -0.07
 14   2.0073  10798.65    -0.05     -42.42    -0.06
 15   2.0073  10797.75    -0.13     -42.04     0.26
 16   2.3953   5906.51    -0.04   -1275.28    -0.06
 17   2.3953   5906.74    -0.06   -1275.40    -0.10
 18   2.3953   5907.30     0.24   -1275.29     0.08
 19   2.3953   5907.25    -0.07   -1275.45    -0.01
 20   5.1493  23400.58 (  -0.07)   -162.37 (   0.75)
 21   5.1494  23396.96    -0.00    -163.68    -0.14

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:         7:4EEE CLASSICAL    7:4EEE

axisobj        43.570    43.583    43.558
ecceobj         0.118     0.118     0.118
incobj          9.905     9.905     9.905
qmin           36.473    36.540    36.539
qmax           51.234    51.288    51.311
amean          43.727    43.727    43.727
amin           43.356    43.356    43.334
amax           44.137    44.178    44.168
emean           0.116     0.113     0.125
emin            0.061     0.055     0.075
emax            0.162     0.161     0.162
imean           7.999     8.030     7.539
imin            6.290     6.350     6.111
imax           10.519    10.483     9.881
excite_mean     0.183     0.182     0.182
fracstop        1.000     1.000     1.000
cjmean          3.059     3.059     3.059

libcent 0       181.2    -180.0     174.6
libamp  0       174.7    -180.0     106.2
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        84.0      84.0      86.5
kozaiamp         47.0      48.4      42.4